87-522: The Codex Windsor is a collection of manuscript sheets with artistic drawings and anatomical studies by the Italian Renaissance artist Leonardo da Vinci . The Codex Windsor owes its name to its preservation in the Royal Collection at Windsor Castle , where it has been since the 17th century. The collection now comprises 606 individually catalogued sheets in various formats. The sheets of
174-461: A distinctive long rectangular shape, were used dating back to the 5th century BCE or earlier, and in some cases continued to be used until the 19th century. In China, bamboo and wooden slips were used prior to the introduction of paper . In Russia, birch bark documents as old as from the 11th century have survived. Paper spread from China via the Islamic world to Europe by the 14th century, and by
261-399: A higher degree, the hands of other primates are anatomically similar and the dexterity of the human hand can not be explained solely on anatomical factors. The neural machinery underlying hand movements is a major contributing factor; primates have evolved direct connections between neurons in cortical motor areas and spinal motoneurons , giving the cerebral cortex monosynaptic control over
348-732: A manuscript is called facsimile . Digital reproductions can be called (high-resolution) scans or digital images . Before the inventions of printing, in China by woodblock and in Europe by movable type in a printing press , all written documents had to be both produced and reproduced by hand. In the west, manuscripts were produced in form of scrolls ( volumen in Latin) or books ( codex , plural codices ). Manuscripts were produced on vellum and other parchment, on papyrus , and on paper. In Indian Subcontinent and Southeast Asia , palm leaf manuscripts , with
435-407: A manuscript, or script for short, is an author's or dramatist's text, used by a theatre company or film crew during the production of the work's performance or filming. More specifically, a motion picture manuscript is called a screenplay; a television manuscript, a teleplay; a manuscript for the theatre, a stage play; and a manuscript for audio-only performance is often called a radio play, even when
522-458: A metal stylus. In the Philippines , for example, as early as 900 AD, specimen documents were not inscribed by stylus, but were punched much like the style of today's dot-matrix printers . This type of document was rare compared to the usual leaves and bamboo staves that were inscribed. However, neither the leaves nor paper were as durable as the metal document in the hot, humid climate. In Burma ,
609-523: A pencil—reflects individual brain functioning. Among humans, the hands play an important function in body language and sign language . Likewise, the ten digits of two hands and the twelve phalanges of four fingers (touchable by the thumb) have given rise to number systems and calculation techniques. Many mammals and other animals have grasping appendages similar in form to a hand such as paws , claws , and talons, but these are not scientifically considered to be grasping hands. The scientific use of
696-399: A primitive trait, while the palms of other extant higher primates are elongated to the extent that some of the thumb's original function has been lost (most notably in highly arboreal primates such as the spider monkey ). In humans, the big toe is thus more derived than the thumb. There is a hypothesis suggesting the form of the modern human hand is especially conducive to the formation of
783-427: A transitional element to the fifth metacarpal. Together with the thumb, the four fingers form four oblique arches, of which the arch of the index finger functionally is the most important, especially for precision grip, while the arch of the little finger contribute an important locking mechanism for power grip. The thumb is undoubtedly the "master digit" of the hand, giving value to all the other fingers. Together with
870-570: Is Digital Scriptorium , hosted by the University of California at Berkeley . Hand A hand is a prehensile , multi- fingered appendage located at the end of the forearm or forelimb of primates such as humans , chimpanzees , monkeys , and lemurs . A few other vertebrates such as the koala (which has two opposable thumbs on each "hand" and fingerprints extremely similar to human fingerprints ) are often described as having "hands" instead of paws on their front limbs. The raccoon
957-474: Is located on one of the sides, parallel to the arm. A reliable way of identifying human hands is from the presence of opposable thumbs. Opposable thumbs are identified by the ability to be brought opposite to the fingers, a muscle action known as opposition. The skeleton of the human hand consists of 27 bones: the eight short carpal bones of the wrist are organized into a proximal row ( scaphoid , lunate , triquetral and pisiform ) which articulates with
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#17330861392831044-685: Is often used by modern academics, especially where the animal has not been established by testing. Merovingian script , or "Luxeuil minuscule", is named after an abbey in Western France, the Luxeuil Abbey , founded by the Irish missionary St Columba c. 590 . Caroline minuscule is a calligraphic script developed as a writing standard in Europe so that the Latin alphabet could be easily recognized by
1131-408: Is supplemented by the precision grip between the thumb and the distal finger pads made possible by the opposable thumbs. Hominidae (great apes including humans) acquired an erect bipedal posture about 3.6 million years ago , which freed the hands from the task of locomotion and paved the way for the precision and range of motion in human hands. Functional analyses of the features unique to
1218-497: Is to the neck of a metacarpal. One can also have a broken finger . The prehensile hands and feet of primates evolved from the mobile hands of semi- arboreal tree shrews that lived about 60 million years ago . This development has been accompanied by important changes in the brain and the relocation of the eyes to the front of the face, together allowing the muscle control and stereoscopic vision necessary for controlled grasping. This grasping, also known as power grip,
1305-505: Is usually described as having "hands" though opposable thumbs are lacking. Some evolutionary anatomists use the term hand to refer to the appendage of digits on the forelimb more generally—for example, in the context of whether the three digits of the bird hand involved the same homologous loss of two digits as in the dinosaur hand. The human hand usually has five digits: four fingers plus one thumb ; these are often referred to collectively as five fingers , however, whereby
1392-662: The Dead Sea scrolls make no such differentiation. Manuscripts using all upper case letters are called majuscule , those using all lower case are called minuscule . Usually, the majuscule scripts such as uncial are written with much more care. The scribe lifted his pen between each stroke, producing an unmistakable effect of regularity and formality. On the other hand, while minuscule scripts can be written with pen-lift, they may also be cursive , that is, use little or no pen-lift. Islamic manuscripts were produced in different ways depending on their use and time period. Parchment (vellum)
1479-402: The Latin : manūscriptum (from manus , hand and scriptum from scribere , to write ). The study of the writing (the "hand") in surviving manuscripts is termed palaeography (or paleography). The traditional abbreviations are MS for manuscript and MSS for manuscripts, while the forms MS. , ms or ms. for singular, and MSS. , mss or mss. for plural (with or without
1566-523: The University of Timbuktu in Mali . Major U.S. repositories of medieval manuscripts include: Many European libraries have far larger collections. Because they are books, pre-modern manuscripts are best described using bibliographic rather than archival standards. The standard endorsed by the American Library Association is known as AMREMM. A growing digital catalog of pre-modern manuscripts
1653-470: The carpal tunnel and contribute to the deep and superficial palmar arches . Several muscle tendons attaching to the TCL and the distal carpals also contribute to maintaining the carpal arch. Compared to the carpal arches, the arch formed by the distal ends of the metacarpal bones is flexible due to the mobility of the peripheral metacarpals (thumb and little finger). As these two metacarpals approach each other,
1740-600: The chimpanzee–human last common ancestor (CHLCA) and absent in modern humans are still present in the hands of Australopithecus , Paranthropus , and Homo floresiensis . This suggests that the derived changes in modern humans and Neanderthals did not evolve until 2.5 to 1.5 million years ago or after the appearance of the earliest Acheulian stone tools, and that these changes are associated with tool-related tasks beyond those observed in other hominins. The thumbs of Ardipithecus ramidus , an early hominin, are almost as robust as in humans, so this may be
1827-462: The codex are dated to the period between 1478 and 1518. The texts and commentaries were written by Leonardo in mirror script . The sheets contain contributions to art and painting, studies of people, animals, plants, and landscapes, as well as mechanics, weaponry, and anatomy. The 153 sheets of anatomical drawings were previously grouped into three volumes: Anatomical Manuscript A (18 sheets), B (42 sheets), and C (93 sheets). Anatomical manuscript C
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#17330861392831914-419: The dermis of palmoplantar skin inhibit melanin production and thus the ability to tan , and promote the thickening of the stratum lucidum and stratum corneum layers of the epidermis . All parts of the skin involved in grasping are covered by papillary ridges ( fingerprints ) acting as friction pads. In contrast, the hairy skin on the dorsal side is thin, soft, and pliable, so that the skin can recoil when
2001-745: The middens of Oxyrhynchus or secreted for safe-keeping in jars and buried ( Nag Hammadi library ) or stored in dry caves ( Dead Sea scrolls ). Volcanic ash preserved some of the Roman library of the Villa of the Papyri in Herculaneum . Manuscripts in Tocharian languages , written on palm leaves, survived in desert burials in the Tarim Basin of Central Asia. Ironically, the manuscripts that were being most carefully preserved in
2088-523: The ulnar nerve may result in a condition in which some of the fingers cannot be flexed. A common fracture of the hand is a scaphoid fracture —a fracture of the scaphoid bone , one of the carpal bones. This is the commonest carpal bone fracture and can be slow to heal due to a limited blood flow to the bone. There are various types of fracture to the base of the thumb; these are known as Rolando fractures , Bennet's fracture , and Gamekeeper's thumb . Another common fracture, known as Boxer's fracture ,
2175-471: The Bible came scores of commentaries. Commentaries were written in volumes, with some focusing on just single pages of scripture. Across Europe, there were universities that prided themselves on their biblical knowledge. Along with universities, certain cities also had their own celebrities of biblical knowledge during the medieval period. A book of hours is a type of devotional text which was widely popular during
2262-688: The Carolingian script, giving it proportion and legibility. This new revision of the Caroline minuscule was called English Protogothic Bookhand. Another script that is derived from the Caroline Minuscule was the German Protogothic Bookhand. It originated in southern Germany during the second half of the 12th century. All the individual letters are Caroline; but just as with English Protogothic Bookhand it evolved. This can be seen most notably in
2349-562: The Middle Ages. They are the most common type of surviving medieval illuminated manuscripts . Each book of hours contain a similar collection of texts, prayers , and psalms but decoration can vary between each and each example. Many have minimal illumination, often restricted to ornamented initials , but books of hours made for wealthier patrons can be extremely extravagant with full-page miniatures . These books were used for owners to recite prayers privately eight different times, or hours, of
2436-455: The anatomy of the human body in the late 1470s and may have participated in the first dissections at the University of Padua . His records indicate that he began performing autopsies himself around 1505. By the year 1518, he reported that he had performed a total of thirty autopsies during his lifetime. He seems to have been particularly interested in the movement and function of internal organs . Leonardo's drawings show representations of
2523-684: The arm of the letter h. It has a hairline that tapers out by curving to the left. When first read the German Protogothic h looks like the German Protogothic b. Many more scripts sprang out of the German Protogothic Bookhand. After those came Bastard Anglicana, which is best described as: The coexistence in the Gothic period of formal hands employed for the copying of books and cursive scripts used for documentary purposes eventually resulted in cross-fertilization between these two fundamentally different writing styles. Notably, scribes began to upgrade some of
2610-402: The back of the hand), the deep palmar arch , and the superficial palmar arch . Together these three arches and their anastomoses provide oxygenated blood to the palm, the fingers, and the thumb. The hand is drained by the dorsal venous network of the hand with deoxygenated blood leaving the hand via the cephalic vein and the basilic vein . The glabrous (hairless) skin on the front of
2697-542: The beginning of this text coming from the Abby of Saint-Martin at Tours . Caroline Minuscule arrived in England in the second half of the 10th century. Its adoption there, replacing Insular script , was encouraged by the importation of continental European manuscripts by Saints Dunstan , Aethelwold , and Oswald . This script spread quite rapidly, being employed in many English centres for copying Latin texts. English scribes adapted
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2784-418: The bones of the forearm, and a distal row ( trapezium , trapezoid , capitate and hamate ), which articulates with the bases of the five metacarpal bones of the hand. The heads of the metacarpals will each in turn articulate with the bases of the proximal phalanx of the fingers and thumb. These articulations with the fingers are the metacarpophalangeal joints known as the knuckles. At the palmar aspect of
2871-464: The codex format (as in a modern book), which had replaced the scroll by Late Antiquity . Parchment or vellum , as the best type of parchment is known, had also replaced papyrus , which was not nearly so long lived and has survived to the present almost exclusively in the very dry climate of Egypt , although it was widely used across the Roman world. Parchment is made of animal skin, normally calf, sheep, or goat, but also other animals. With all skins,
2958-715: The collection, in accordance with national and international content standards such as DACS and ISAD(G) . In other contexts, however, the use of the term "manuscript" no longer necessarily means something that is hand-written. By analogy a typescript has been produced on a typewriter. In book, magazine, and music publishing, a manuscript is an autograph or copy of a work, written by an author, composer or copyist. Such manuscripts generally follow standardized typographic and formatting rules, in which case they can be called fair copy (whether original or copy). The staff paper commonly used for handwritten music is, for this reason, often called "manuscript paper". In film and theatre,
3045-432: The cursive scripts. A script that has been thus formalized is known as a bastard script (whereas a bookhand that has had cursive elements fused onto it is known as a hybrid script). The advantage of such a script was that it could be written more quickly than a pure bookhand; it thus recommended itself to scribes in a period when demand for books was increasing and authors were tending to write longer texts. In England during
3132-457: The day. Along with Bibles, large numbers of manuscripts made in the Middle Ages were received in Church . Due to the complex church system of rituals and worship these books were the most elegantly written and finely decorated of all medieval manuscripts. Liturgical books usually came in two varieties. Those used during mass and those for divine office. Most liturgical books came with a calendar in
3219-437: The densest areas of nerve endings in the body, and are the richest source of tactile feedback. They also have the greatest positioning capability of the body; thus, the sense of touch is intimately associated with hands. Like other paired organs (eyes, feet, legs) each hand is dominantly controlled by the opposing brain hemisphere , so that handedness —the preferred hand choice for single-handed activities such as writing with
3306-519: The disorders that can cause this is Catel-Manzke syndrome . The fingers may be fused in a disorder known as syndactyly . Or there may be an absence of one or more central fingers—a condition known as ectrodactyly . Additionally, some people are born without one or both hands ( amelia ). Hereditary multiple exostoses of the forearm—also known as hereditary multiple osteochondromas—is another cause of hand and forearm deformity in children and adults. There are several cutaneous conditions that can affect
3393-506: The documents in 1570. Around 1590, Orazio Melzi sold over 2,500 individual sheets to the sculptor and art collector Pompeo Leoni . Leoni attempted to organize the manuscripts thematically, separating Leonardo's artistic ideas from his technical and scientific drawings. He cut out sheets and glued together others that were not originally part of the whole. In this way, he grouped Leonardo's anatomical drawings with other manuscripts on different subjects into several volumes, which were later given
3480-537: The early centuries of the Christian era , manuscripts were written without spaces between the words ( scriptio continua ), which makes them especially hard for the untrained to read. Extant copies of these early manuscripts written in Greek or Latin and usually dating from the 4th century to the 8th century, are classified according to their use of either all upper case or all lower case letters . Hebrew manuscripts, such as
3567-617: The entire human body in various stages of dissection , as well as individual limbs and organs. He drew body parts through multiple incisions and is therefore often considered the historical founder of tomographic imaging in medicine. It is mentioned that the Codex Windsor also deals with Leonardo's incessant study of horses, their movements, their postures, etc. After Leonardo's death most of his manuscripts and drawings were kept at his villa near Vaprio d'Adda , Lombardy, by his student and heir Francesco Melzi . His son, Orazio Melzi, inherited
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3654-447: The exact number varies between people: whereas a pair of sesamoid bones are found at virtually all thumb metacarpophalangeal joints, sesamoid bones are also common at the interphalangeal joint of the thumb (72.9%) and at the metacarpophalangeal joints of the little finger (82.5%) and the index finger (48%). In rare cases, sesamoid bones have been found in all the metacarpophalangeal joints and all distal interphalangeal joints except that of
3741-426: The fingers and toes". The ratio of the length of the index finger to the length of the ring finger in adults is affected by the level of exposure to male sex hormones of the embryo in utero . This digit ratio is below 1 for both sexes but it is lower in males than in females on average. A number of genetic disorders affect the hand. Polydactyly is the presence of more than the usual number of fingers. One of
3828-434: The fingers are stretched. On the dorsal side, the skin can be moved across the hand up to 3 cm (1.2 in); an important input the cutaneous mechanoreceptors . The web of the hand is a "fold of skin which connects the digits". These webs, located between each set of digits, are known as skin folds (interdigital folds or plica interdigitalis). They are defined as "one of the folds of skin, or rudimentary web, between
3915-417: The first metacarpophalangeal joints are small, almost spherical bones called the sesamoid bones. The fourteen phalanges make up the fingers and thumb, and are numbered I-V (thumb to little finger) when the hand is viewed from an anatomical position (palm up). The four fingers each consist of three phalanx bones: proximal, middle, and distal. The thumb only consists of a proximal and distal phalanx. Together with
4002-447: The fourteenth and fifteenth centuries, many books were written in the script known as Bastard Anglicana. From ancient texts to medieval maps, anything written down for study would have been done with manuscripts. Some of the most common genres were bibles, religious commentaries, philosophy, law and government texts. " The Bible was the most studied book of the Middle Ages". The Bible was the center of medieval religious life. Along with
4089-558: The front. This served as a quick reference point for important dates in Jesus' life and to tell church officials which saints were to be honored and on what day. In the context of library science , a manuscript is defined as any hand-written item in the collections of a library or an archive. For example, a library's collection of hand-written letters or diaries is considered a manuscript collection. Such manuscript collections are described in finding aids, similar to an index or table of contents to
4176-523: The full stop, all uppercase or all lowercase) are also accepted. The second s is not simply the plural; by an old convention, a doubling of the last letter of the abbreviation expresses the plural, just as pp. means "pages". A manuscript may be a codex (i.e. bound as a book ), a scroll , or bound differently or consist of loose pages. Illuminated manuscripts are enriched with pictures, border decorations, elaborately embossed initial letters or full-page illustrations. The mechanical reproduction of
4263-418: The groove on the dorsum of inferior side of ulna. The hand is innervated by the radial , median , and ulnar nerves . The radial nerve supplies the finger extensors and the thumb abductor , thus the muscles that extends at the wrist and metacarpophalangeal joints (knuckles); and that abducts and extends the thumb. The median nerve supplies the flexors of the wrist and digits, the abductors and opponens of
4350-456: The hand including the nails . The autoimmune disease rheumatoid arthritis can affect the hand, particularly the joints of the fingers. Some conditions can be treated by hand surgery . These include carpal tunnel syndrome , a painful condition of the hand and fingers caused by compression of the median nerve , and Dupuytren's contracture , a condition in which fingers bend towards the palm and cannot be straightened. Similarly, injury to
4437-457: The hand of modern humans have shown that they are consistent with the stresses and requirements associated with the effective use of paleolithic stone tools. It is possible that the refinement of the bipedal posture in the earliest hominids evolved to facilitate the use of the trunk as leverage in accelerating the hand. While the human hand has unique anatomical features, including a longer thumb and fingers that can be controlled individually to
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#17330861392834524-448: The hand, that of the thumb is the most mobile (and the least longitudinal). While the ray formed by the little finger and its associated metacarpal bone still offers some mobility, the remaining rays are firmly rigid. The phalangeal joints of the index finger, however, offer some independence to its finger, due to the arrangement of its flexor and extension tendons. The carpal bones form two transversal rows, each forming an arch concave on
4611-400: The hand, the palm, is relatively thick and can be bent along the hand's flexure lines where the skin is tightly bound to the underlying tissue and bones. Compared to the rest of the body's skin, the hands' palms (as well as the soles of the feet ) are usually lighter—and even much lighter in dark-skinned individuals, compared to the other side of the hand. Indeed, genes specifically expressed in
4698-461: The human hand are plesiomorphic (shared by both ancestors and extant primate species); the elongated thumbs and short hands more closely resemble the hand proportions of Miocene apes than those of extant primates. Humans did not evolve from knuckle-walking apes, and chimpanzees and gorillas independently acquired elongated metacarpals as part of their adaptation to their modes of locomotion. Several primitive hand features most likely present in
4785-413: The human hand include: There are five digits attached to the hand, notably with a nail fixed to the end in place of the normal claw . The four fingers can be folded over the palm which allows the grasping of objects. Each finger, starting with the one closest to the thumb, has a colloquial name to distinguish it from the others: The thumb (connected to the first metacarpal bone and trapezium )
4872-413: The human hand, including pentadactyly (having five fingers), the hairless skin of the palm and fingers, and the os centrale found in human embryos, prosimians, and apes. Furthermore, the precursors of the intrinsic muscles of the hand are present in the earliest fishes, reflecting that the hand evolved from the pectoral fin and thus is much older than the arm in evolutionary terms. The proportions of
4959-450: The index and middle finger, it forms the dynamic tridactyl configuration responsible for most grips not requiring force. The ring and little fingers are more static, a reserve ready to interact with the palm when great force is needed. The muscles acting on the hand can be subdivided into two groups: the extrinsic and intrinsic muscle groups. The extrinsic muscle groups are the long flexors and extensors . They are called extrinsic because
5046-421: The index finger. For example, in some individuals, the ulnar nerve supplies the entire ring finger and the ulnar side of the middle finger, whilst, in others, the median nerve supplies the entire ring finger. The hand is supplied with blood from two arteries, the ulnar artery and the radial artery . These arteries form three arches over the dorsal and palmar aspects of the hand, the dorsal carpal arch (across
5133-477: The interlocking shapes of the carpal bones, and the wrist is therefore more stable in flexion than in extension. The distal carpal arch affects the function of the CMC joints and the hands, but not the function of the wrist or the proximal carpal arch. The ligaments that maintain the distal carpal arches are the transverse carpal ligament and the intercarpal ligaments (also oriented transversally). These ligaments also form
5220-505: The kammavaca, Buddhist manuscripts, were inscribed on brass, copper or ivory sheets, and even on discarded monk robes folded and lacquered. In Italy some important Etruscan texts were similarly inscribed on thin gold plates: similar sheets have been discovered in Bulgaria . Technically, these are all inscriptions rather than manuscripts. In the Western world, from the classical period through
5307-549: The late 15th century had largely replaced parchment for many purposes there. When Greek or Latin works were published, numerous professional copies were sometimes made simultaneously by scribes in a scriptorium , each making a single copy from an original that was declaimed aloud. The oldest written manuscripts have been preserved by the perfect dryness of their Middle Eastern resting places, whether placed within sarcophagi in Egyptian tombs, or reused as mummy -wrappings, discarded in
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#17330861392835394-402: The libraries of antiquity are virtually all lost. Papyrus has a life of at most a century or two in relatively humid Italian or Greek conditions; only those works copied onto parchment, usually after the general conversion to Christianity, have survived, and by no means all of those. Originally, all books were in manuscript form. In China, and later other parts of East Asia, woodblock printing
5481-652: The literate class from different regions. It was used in the Holy Roman Empire between approximately 800 and 1200. Codices, classical and Christian texts, and educational material were written in Carolingian minuscule throughout the Carolingian Renaissance . The script developed into blackletter and became obsolete, though its revival in the Italian renaissance forms the basis of more recent scripts. In Introduction to Manuscript Studies , Clemens and Graham associate
5568-420: The long finger. The articulations are: The fixed and mobile parts of the hand adapt to various everyday tasks by forming bony arches: longitudinal arches (the rays formed by the finger bones and their associated metacarpal bones), transverse arches (formed by the carpal bones and distal ends of the metacarpal bones), and oblique arches (between the thumb and four fingers): Of the longitudinal arches or rays of
5655-456: The motoneurons of the hand muscles; placing the hands "closer" to the brain. The recent evolution of the human hand is thus a direct result of the development of the central nervous system , and the hand, therefore, is a direct tool of our consciousness—the main source of differentiated tactile sensations—and a precise working organ enabling gestures—the expressions of our personalities. There are nevertheless several primitive features left in
5742-455: The muscle belly is located on the forearm. The intrinsic muscle groups are the thenar (thumb) and hypothenar (little finger) muscles; the interosseous muscles ( four dorsally and three volarly ) originating between the metacarpal bones; and the lumbrical muscles arising from the deep flexor (and are special because they have no bony origin) to insert on the dorsal extensor hood mechanism. The fingers have two long flexors, located on
5829-675: The name Codex Windsor. The origins of the Codex Windsor in the Royal Collection are still unclear. It was probably acquired by Charles I or Charles II in the 17th century. However, it is known that Mary II showed the codex to the Dutch statesman Constantijn Huygens at Kensington Palace in 1690. Manuscript A manuscript (abbreviated MS for singular and MSS for plural) was, traditionally, any document written by hand or typewritten , as opposed to mechanically printed or reproduced in some indirect or automated way. More recently,
5916-403: The palmar gutter deepens. The central-most metacarpal (middle finger) is the most rigid. It and its two neighbors are tied to the carpus by the interlocking shapes of the metacarpal bones. The thumb metacarpal only articulates with the trapezium and is therefore completely independent, while the fifth metacarpal (little finger) is semi-independent with the fourth metacarpal (ring finger) which forms
6003-407: The palmar side of the thumb, index, middle, and half ring fingers. Dorsal branches innervates the distal phalanges of the index, middle, and half ring fingers. The ulnar nerve supplies the ulnar third of the hand, both at the palm and the back of the hand, and the little and half ring fingers. There is a considerable variation to this general pattern, except for the little finger and volar surface of
6090-410: The palmar side. Because the proximal arch simultaneously has to adapt to the articular surface of the radius and to the distal carpal row, it is by necessity flexible. In contrast, the capitate, the "keystone" of the distal arch, moves together with the metacarpal bones and the distal arch is therefore rigid. The stability of these arches is more dependent of the ligaments and capsules of the wrist than of
6177-415: The phalanges of the fingers and thumb these metacarpal bones form five rays or poly-articulated chains. Because supination and pronation (rotation about the axis of the forearm) are added to the two axes of movements of the wrist, the ulna and radius are sometimes considered part of the skeleton of the hand. There are numerous sesamoid bones in the hand, small ossified nodes embedded in tendons;
6264-697: The population organized around the NGO "Sauvegarde et valorisation des manuscrits pour la défense de la culture islamique" (SAVAMA-DCI). Some 350,000 manuscripts were transported to safety, and 300,000 of them were still in Bamako in 2022. An international consultation on the safeguarding, accessibility and promotion of ancient manuscripts in the Sahel was held at the UNESCO office in Bamako in 2020. Most surviving pre-modern manuscripts use
6351-542: The quality of the finished product is based on how much preparation and skill was put into turning the skin into parchment. Parchment made from calf or sheep was the most common in Northern Europe, while civilizations in Southern Europe preferred goatskin. Often, if the parchment is white or cream in color and veins from the animal can still be seen, it is calfskin. If it is yellow, greasy or in some cases shiny, then it
6438-418: The recorded performance is disseminated via non-radio means. In insurance, a manuscript policy is one that is negotiated between the insurer and the policyholder, as opposed to an off-the-shelf form supplied by the insurer. About 300,000 Latin, 55,000 Greek, 30,000 Armenian and 12,000 Georgian medieval manuscripts have survived. National Geographic estimates that 700,000 African manuscripts have survived at
6525-403: The tendons of these form the anatomical snuff box . Also, the index finger and the little finger have an extra extensor used, for instance, for pointing. The extensors are situated within 6 separate compartments. The first four compartments are located in the grooves present on the dorsum of inferior side of radius while the 5th compartment is in between radius and ulna. The 6th compartment is in
6612-410: The term hand in this sense to distinguish the terminations of the front paws from the hind ones is an example of anthropomorphism . The only true grasping hands appear in the mammalian order of primates . Hands must also have opposable thumbs , as described later in the text. The hand is located at the distal end of each arm. Apes and monkeys are sometimes described as having four hands, because
6699-469: The term has come to be understood to further include any written, typed, or word-processed copy of an author's work, as distinguished from the rendition as a printed version of the same. Before the arrival of prints, all documents and books were manuscripts. Manuscripts are not defined by their contents, which may combine writing with mathematical calculations, maps, music notation , explanatory figures, or illustrations. The word "manuscript" derives from
6786-405: The thumb in opposition, making grasping possible. The extensors are located on the back of the forearm and are connected in a more complex way than the flexors to the dorsum of the fingers. The tendons unite with the interosseous and lumbrical muscles to form the extensorhood mechanism. The primary function of the extensors is to straighten out the digits. The thumb has two extensors in the forearm;
6873-415: The thumb is included as one of the fingers . It has 27 bones, not including the sesamoid bone , the number of which varies among people, 14 of which are the phalanges ( proximal , intermediate and distal ) of the fingers and thumb. The metacarpal bones connect the fingers and the carpal bones of the wrist . Each human hand has five metacarpals and eight carpal bones. Fingers contain some of
6960-461: The thumb, the first and second lumbrical. The ulnar nerve supplies the remaining intrinsic muscles of the hand. All muscles of the hand are innervated by the brachial plexus (C5–T1) and can be classified by innervation: The radial nerve supplies the skin on the back of the hand from the thumb to the ring finger and the dorsal aspects of the index, middle, and half ring fingers as far as the proximal interphalangeal joints. The median nerve supplies
7047-410: The toes are long and the hallux is opposable and looks more like a thumb , thus enabling the feet to be used as hands. The word "hand" is sometimes used by evolutionary anatomists to refer to the appendage of digits on the forelimb such as when researching the homology between the three digits of the bird hand and the dinosaur hand. An adult human male's hand weighs about a pound. Areas of
7134-486: The typewriter in the late 19th century. Because of the likelihood of errors being introduced each time a manuscript was copied, the filiation of different versions of the same text is a fundamental part of the study and criticism of all texts that have been transmitted in manuscript. In Southeast Asia , in the first millennium, documents of sufficiently great importance were inscribed on soft metallic sheets such as copperplate , softened by refiner's fire and inscribed with
7221-435: The underside of the forearm. They insert by tendons to the phalanges of the fingers. The deep flexor attaches to the distal phalanx, and the superficial flexor attaches to the middle phalanx. The flexors allow for the actual bending of the fingers. The thumb has one long flexor and a short flexor in the thenar muscle group. The human thumb also has other muscles in the thenar group ( opponens and abductor brevis muscle ), moving
7308-576: Was a common way to produce manuscripts. Manuscripts eventually transitioned to using paper in later centuries with the diffusion of paper making in the Islamic empire. When Muslims encountered paper in Central Asia, its use and production spread to Iran, Iraq, Syria, Egypt, and North Africa during the 8th century. 4,203 of Timbuktu's manuscripts were burned or stolen during the armed conflict in Mali between 2012 and 2013. 90% of these manuscripts were saved by
7395-494: Was in turn divided into six anatomical quires, the Quaderni di anatomia I–VI . One image shows a fetus in the right position within an excised uterus. Leonardo also accurately drew uterine arteries and the vascular system of the cervix and vagina. To prepare for these drawings, Leonardo studied human embryology with the help of anatomist Marcantonio della Torre and saw a fetus in a dissected corpse. Leonardo da Vinci began studying
7482-412: Was made from sheepskin. Vellum comes from the Latin word vitulinum which means "of calf"/ "made from calf". For modern parchment makers and calligraphers, and apparently often in the past, the terms parchment and vellum are used based on the different degrees of quality, preparation and thickness, and not according to which animal the skin came from, and because of this, the more neutral term "membrane"
7569-504: Was used for books from about the 7th century. The earliest dated example is the Diamond Sutra of 868. In the Islamic world and the West, all books were in manuscript until the introduction of movable type printing in about 1450. Manuscript copying of books continued for a least a century, as printing remained expensive. Private or government documents remained hand-written until the invention of
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