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Encyclopedia > 5th metatarsal bone

The metatarsus consists of the five long bones of the foot, which are numbered from the medial side (ossa metatarsalia I.-V.); each presents for examination a body and two extremities. These are analogous to the metacarpals of the hand. Grays illustration of a human femur, a typically recognized bone. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... In human and zoological anatomy (sometimes called zootomy), several terms are used to describe the location of organs and other structures in the body of bilateral animals. ... The metacarpus is the intermediate part of the hand skeleton that is located between the fingers distally and the carpus which forms the connection to the forearm. ... A human hand typically has four fingers and a thumb The hand (med. ...

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Common characteristics of the metatarsal bones

The body is prismoid in form, tapers gradually from the tarsal to the phalangeal extremity, and is curved longitudinally, so as to be concave below, slightly convex above. The base or posterior extremity is wedge-shaped, articulating proximally with the tarsal bones, and by its sides with the contiguous metatarsal bones: its dorsal and plantar surfaces are rough for the attachment of ligaments. The head or anterior extremity presents a convex articular surface, oblong from above downward, and extending farther backward below than above. Its sides are flattened, and on each is a depression, surmounted by a tubercle, for ligamentous attachment. Its plantar surface is grooved antero-posteriorly for the passage of the flexor tendons, and marked on either side by an articular eminence continuous with the terminal articular surface. In tetrapods, the tarsi are the cluster of bones in the foot between the tibia and fibula and the metatarsus. ... The phalanges in a human hand The name Phalanges is commonly given to the bones that form fingers and toes. ... In geometry, concavity is a property of certain geometric figures, and in calculus, a property of certain graphs of functions. ... In mathematics, an object is convex if for any pair of points within the object, any point on the straight line segment that joins them is also within the object. ... The English word POSTERIOR is identical to the original Latin adjective, and has two different uses : as an ADJECTIVE, it indicates that someone or something is behind another, either spatially or chronologically it also became a SUBSTANTIVE, indicating the rear-end, especially of a person, i. ... Technically a portable double inclined plane, a wedge is a simple machine used to separate two objects, or portions of objects, through the application of force, perpendicular to the inclined surfaces, developed by conversion of force applied to the blunt end. ... The word dorsal can refer to many different things. ... A ligament is a short band of tough fibrous connective tissue composed mainly of long, stringy collagen fibres. ... 1. ... In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals. ... A tendon or sinew is a tough band of fibrous connective tissue that connects muscle to bone. ...


Characteristics of the individual metatarsal bones

The first metatarsal bone

('os metatarsale I; metatarsal bone of the great toe') [Fig. 1] The first metatarsal bone is remarkable for its great thickness, and is the shortest of the metatarsal bones. The body is strong, and of well-marked prismoid form. The base presents, as a rule, no articular facets on its sides, but occasionally on the lateral side there is an oval facet, by which it articulates with the second metatarsal. Its proximal articular surface is of large size and kidney-shaped; its circumference is grooved, for the tarsometatarsal ligaments, and medially gives insertion to part of the tendon of the Tibialis anterior; its plantar angle presents a rough oval prominence for the insertion of the tendon of the Peronæus longus. The head is large; on its plantar surface are two grooved facets, on which glide sesamoid bones; the facets are separated by a smooth elevation. Human kidneys viewed from behind with spine removed The kidneys are bean-shaped excretory organs in vertebrates. ...

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Figure 1 : The first metatarsal. (Left.)
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Figure 2 : The second metatarsal. (Left.)
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Figure 3 : The third metatarsal. (Left.)
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Figure 4 : The fourth metatarsal. (Left.)

Image File history File links Gray284. ... Image File history File links Gray285. ... Image File history File links Gray286. ... Image File history File links Gray287. ...

The second metatarsal bone

('os metatarsale II') [Fig. 2] The second metatarsal bone is the longest of the metatarsal bones, being prolonged backward into the recess formed by the three cuneiform bones. Its base is broad above, narrow and rough below. It presents four articular surfaces: one behind, of a triangular form, for articulation with the second cuneiform; one at the upper part of its medial surface, for articulation with the first cuneiform; and two on its lateral surface, an upper and lower, separated by a rough non-articular interval. Each of these lateral articular surfaces is divided into two by a vertical ridge; the two anterior facets articulate with the third metatarsal; the two posterior (sometimes continuous) with the third cuneiform. A fifth facet is occasionally present for articulation with the first metatarsal; it is oval in shape, and is situated on the medial side of the body near the base. There are three cuneiform bones in the human foot: the medial cuneiform, the intermediate cuneiform and the lateral cuneiform. ... For alternate meanings, such as the musical instrument, see triangle (disambiguation). ... An oval or ovoid was originally an egg shape (from Latin OVVM); it is now usually used to refer to ellipses, but can also mean any similar shape, such as egg shapes or race-course shapes (a semicircle on either side of a quadrilateral). ...


The third metatarsal bone

('os metatarsale III') [Fig. 3] The third metatarsal bone articulates proximally, by means of a triangular smooth surface, with the third cuneiform; medially, by two facets, with the second metatarsal; and laterally, by a single facet, with the fourth metatarsal. This last facet is situated at the dorsal angle of the base.

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Figure 5 : The fifth metatarsal. (Left.)

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The fourth metatarsal bone

('os metatarsale IV') [Fig. 4] The fourth metatarsal bone is smaller in size than the preceding; its base presents an oblique quadrilateral surface for articulation with the cuboid; a smooth facet on the medial side, divided by a ridge into an anterior portion for articulation with the third metatarsal, and a posterior portion for articulation with the third cuneiform; on the lateral side a single facet, for articulation with the fifth metatarsal. Oblique can mean one of several things: In linguistics, oblique case. ... In geometry, a quadrilateral is a polygon with four sides and four vertices. ...


The fifth metatarsal bone

('os metatarsale V') [Fig. 5] The fifth metatarsal bone is recognized by a rough eminence, the tuberosity, on the lateral side of its base. The base articulates behind, by a triangular surface cut obliquely in a transverse direction, with the cuboid; and medially, with the fourth metatarsal. On the medial part of its dorsal surface is inserted the tendon of the Peronæus tertius and on the dorsal surface of the tuberosity that of the Peronæus brevis. A strong band of the plantar aponeurosis connects the projecting part of the tuberosity with the lateral process of the tuberosity of the calcaneus. The plantar surface of the base is grooved for the tendon of the Abductor digiti quinti, and gives origin to the Flexor digiti quinti brevis. The term, transverse means side-to-side as opposed to longitudinal which means front-to-back. In automotive engineering, the term, transverse refers to an engine in which the crankshaft is oriented side-to-side relative to the wheels of the vehicle. ... In anatomy, the cuboid bone is a bone in the foot. ... In anatomy, a process (Latin: processus) is a projection or outgrowth of tissue from a larger body. ...


Articulations

The base of each metatarsal bone articulates with one or more of the tarsal bones, and the head with one of the first row of phalanges. The first metatarsal articulates with the first cuneiform, the second with all three cuneiforms, the third with the third cuneiform, the fourth with the third cuneiform and the cuboid, and the fifth with the cuboid.


This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... Henry Grays Anatomy of the Human Body, commonly known as Grays Anatomy, is an anatomy textbook widely regarded as a classic work on human anatomy. ...

Human Bones

SKULL: cranial (frontal | parietal | temporal | occipital | sphenoid | ethmoid) | facial (zygomatic | maxilla | nasal | mandible | palatine | lacrimal | vomer | inferior nasal conchae) | ossicles (malleus | incus | stapes) | other (hyoid)
A typical adult human skeleton consists of the following 206 bones. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... A hippopotamus skull A skull, or cranium, is a bony structure of Craniates which serves as the general framework for a head. ... The frontal bone (os frontale) is a bone in the human skull that resembles a cockle-shell in form, and consists of two portions—a vertical portion, the squama, corresponding with the region of the forehead; and an orbital or horizontal portion, which enters into the formation of the roofs... The parietal bones (os parietale) are bones in the human skull and form, by their union, the sides and roof of the cranium. ... The temporal bones (os temporales) are situated at the sides and base of the skull. ... The occipital bone [Fig. ... Figure 1 : Sphenoid bone, upper surface. ... Your skull is in your back (this is obviously not true, I was just testing the website to see if it really works) The ethmoid bone (os ethmoidale) is a bone in the skull that separates the nasal cavity from the brain. ... The zygomatic bone (also known as the zygoma; Os Zygomaticum; Malar Bone) is a paired bone of the human skull. ... The maxillae are the largest bones of the face, except for the mandible, and form, by their union, the whole of the upper jaw. ... The Nasal Bones (Ossa Faciei & Ossa Nasalia) are two small oblong bones, varying in size and form in different individuals; they are placed side by side at the middle and upper part of the face, and form, by their junction, the bridge of the nose. ... The mandible (inferior maxillary bone) (together with the maxilla) is the largest and strongest bone of the face. ... The palatine bone is a bone situated at the back part of the nasal cavity between the maxilla and the pterygoid process of the sphenoid. ... The lacrimal bone (Os Lacrimale), the smallest and most fragile bone of the face, is situated at the front part of the medial wall of the orbit . ... The vomer bone is one of the unpaired facial bones of the skull. ... The inferior nasal concha (Concha Nasalis Inferior; Inferior Turbinated Bone) extends horizontally along the lateral wall of the nasal cavity [Fig. ... The ossicles (also called auditory ossicles) are the three smallest bones in the human body. ... The malleus is hammer-shaped small bone or ossicle of the middle ear which connects with the incus and is attached to the inner surface of the eardrum. ... The incus is the anvil-shaped small bone or ossicle in the middle ear. ... stapes The stapes or stirrup is the stirrup-shaped small bone or ossicle in the middle ear which attaches the incus to the fenestra ovalis, the oval window which is adjacent to the vestibule of the inner ear. ... The hyoid bone (Os Hyoideum; Lingual Bone) is a bone in the human neck, not articulated to any other bone; it is supported by the muscles of the neck and in turn supports the root of the tongue. ...


UPPER LIMBS: arm (humerus | ulna | radius) | carpus (scaphoid | lunate bone | triquetral | pisiform | trapezium | trapezoid | capitate | hamate) | metacarpals | phalanges (proximal | intermediate | distal)
ARM may stand for: Most likely: ARM Ltd (originally Advanced RISC Machines) ARM architecture CPU design or one of its derivatives developed by ARM Ltd (originally called The Acorn RISC Machine) Adjustable rate mortgage Annotated Reference Manual (C++) Artificial rupture of membranes (see amniotic sac) the ISO 3166-1 3... The humerus is a long bone in the arm or fore-legs (animals) that runs from the shoulder to the elbow. ... The ulna (Elbow Bone) [Figs. ... The radius and ulna of the left forearm, posterior surface. ... In Greek mythology, Carpus fruit was a son of Chloris and Boreas. ... The scaphoid bone of the wrist is found on the thumb side of the hand, within the anatomical snuffbox. ... The lunate bone (os lunatum; semilunar bone) is a bone in the human hand that may be distinguished by its deep concavity and crescentic outline. ... The triquetral bone (also called triquetral, os triquetrum, cuneiform bone, pyramidal bone, cubital bone, os pyramidale, os triangulare, three-cornered bone, and triangular bone) is a type of carpal bone. ... The left pisiform bone. ... The trapezium is a bone in the human hand. ... In human anatomy, the trapezoid bone (lesser multangular bone; os multangulum minus) is a bone in the hands. ... The capitate bone (os capitatum; os magnum) is a bone in the human hand. ... The hamate bone (os hamatum; unciform bone) is a bone in the human hand that may be readily distinguished by its wedge-shaped form, and the hook-like process which projects from its volar surface. ... The metacarpus is the intermediate part of the hand skeleton that is located between the fingers distally and the carpus which forms the connection to the forearm. ... Proximal phalanges are bones found in the limbs of most vertebrates. ... Intermediate phalanges are bones found in the limbs of most vertebrates. ... Distal phalanges are bones found in the limbs of most vertebrate skeletons. ...


THORAX AND SHOULDER: clavicle | scapula | sternum | rib | vertebrae (cervical - atlas - axis | thoracic | lumbar) | coccyx | ossa coxae | sacrum Diagram of a tsetse fly, showing the head, thorax and abdomen The thorax is a division of an animals body that lies between the head and the abdomen. ... The human upper arm In human anatomy, the shoulder joint is composed of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone). ... Left clavicle - from above Left clavicle - from below In human anatomy, the clavicle or collar bone is a bone that makes up part of the shoulder girdle (pectoral girdle). ... Left scapula - front view () Left scapula - rear view () In anatomy, the scapula, or shoulder blade, is the bone that connects the humerus (arm bone) with the clavicle (collar bone). ... Sternum or breastbone is a long, flat bone located in the center of the thorax (chest). ... The human rib cage. ... A diagram of a thoracic vertebra. ... A cervical vertebra Cervical vertebrae (Vertebrae cervicales) are the smallest of the true vertebrae, and can be readily distinguished from those of the thoracic or lumbar regions by the presence of a foramen (hole) in each transverse process. ... First cervical vertebra, or Atlas In anatomy, the Atlas (C1) is the topmost (first) cervical vertebra of the spine. ... In anatomy, the second cervical vertebra (C2) of the spine is named the axis or epistropheus. ... A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ... Categories: Anatomy stubs | Anatomy ... The coccyx is formed of four fused vertebrae. ... Human male pelvis, viewed from front Human female pelvis, viewed from front The pelvis is the bony structure located at the base of the spine (properly known as the caudal end). ... Sacrum, pelvic surface The sacrum (os sacrum) is a large, triangular bone at the base of the vertebral column and at the upper and back part of the pelvic cavity, where it is inserted like a wedge between the two hip bones. ...


LOWER LIMBS: leg (femur | patella | fibula | tibia) | tarsus (calcaneus | talus | navicular | cuneiform | cuboid ) | metatarsals | phalanges (proximal | intermediate | distal)
In common language leg refers to the entire lower limb, including (at least) the thigh, the knee, and the calf. ... Anterior view of the femur The femur or thigh bone is the longest, most voluminous and strongest bone of the human body. ... Left patella - anterior aspect Left patella - posterior aspect The patella or kneecap is a thick, triangular bone which articulates with the femur and covers and protects the front of the knee joint. ... Figure 1 : Lower extremity of right fibula. ... Figure 1 : Upper surface of right tibia. ... In tetrapods, the tarsi are the cluster of bones in the foot between the tibia and fibula and the metatarsus. ... The calcaneus is the large bone making up the heel of the human foot. ... In anatomy, the talus bone of the ankle joint connects the leg to the foot. ... The navicular bone (also called the navicular or scaphoid) is a small boat-shaped human bone of the tarsus. ... There are three cuneiform bones in the human foot: the medial cuneiform, the intermediate cuneiform and the lateral cuneiform. ... The cuboid bone is one of seven Tarsal bones. ... Proximal phalanges are bones found in the limbs of most vertebrates. ... Intermediate phalanges are bones found in the limbs of most vertebrates. ... Distal phalanges are bones found in the limbs of most vertebrate skeletons. ...

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