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Encyclopedia > Metacarpophalangeal joint
Metacarpophalangeal joint
Metacarpophalangeal articulation and articulations of digit. Volar aspect.
Metacarpophalangeal articulation and articulations of digit. Ulnar aspect.
Latin Articulationes Metacarpophalangeæ
Gray's subject #90 332
MeSH Metacarpophalangeal+Joint

The Metacarpophalangeal joint (MCP): The Metacarpophalangeal Articulations are of the condyloid kind, formed by the reception of the rounded heads of the metacarpal bones into shallow cavities on the proximal ends of the first phalanges, with the exception of that of the thumb, which presents more of the characters of a ginglymoid joint. The main examples of this kind of joint are in the human hand. Image File history File links Gray337. ... Image File history File links Gray338. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... In a condyloid joint (condyloid articulation, ellipsoidal joint) an ovoid articular surface, or condyle, is received into an elliptical cavity in such a manner as to permit of flexion, extension, adduction, abduction, and circumduction, but no axial rotation. ... 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. ... The phalanges in a human hand The name Phalanges is commonly given to the bones that form fingers and toes. ... In human anatomy, the thumb is the first digit on a hand. ... In the hinge joint (ginglymus), the articular surfaces are moulded to each other in such a manner as to permit motion only in one plane, forward and backward, the extent of motion at the same time being considerable. ...

Contents

Ligaments

Each joint has a volar and two collateral ligaments. 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. ... A ligament is a short band of tough fibrous connective tissue composed mainly of long, stringy collagen molecules. ...


Volar ligaments

The volar ligaments (glenoid ligaments of Cruveilhier; palmar or vaginal ligaments) are thick, dense, fibrocartilaginous structures, placed upon the volar surfaces of the joints in the intervals between the collateral ligaments, to which they are connected; they are loosely united to the metacarpal bones, but are very firmly attached to the bases of the first phalanges. The phalanges in a human hand The name Phalanges is commonly given to the bones that form fingers and toes. ...


Their volar surfaces are intimately blended with the transverse metacarpal ligament, and present grooves for the passage of the Flexor tendons, the sheaths surrounding which are connected to the sides of the grooves.


Their deep surfaces form parts of the articular facets for the heads of the metacarpal bones, and are lined by synovial membranes.


Collateral Ligaments

The collateral ligaments (ligamenta collateralia; lateral ligaments) are strong, rounded cords, placed on the sides of the joints (Radial Collateral Ligament (RCL), Ulnar Collateral Ligament (UCL)); each is attached by one extremity to the posterior tubercle and adjacent depression on the side of the head of the metacarpal bone, and by the other to the contiguous extremity of the phalanx. The posterior arch of a cervical vertebra forms about two-fifths of the circumference of the ring: it ends behind in the posterior tubercle, which is the rudiment of a spinous process and gives origin to the Recti capitis posteriores minores. ... The phalanges in a human hand Bones of the human hand. ...


Dorsal surfaces

The dorsal surfaces of these joints are covered by the expansions of the Extensor tendons, together with some loose areolar tissue which connects the deep surfaces of the tendons to the bones. Types of connective tissue Areolar connective tissue (or loose connective tissue) is the most widely distributed connective tissue type in vertebrates. ...


Movements

The movements which occur in these joints are flexion, extension, adduction, abduction, and circumduction; the movements of abduction and adduction are very limited, and cannot be performed when the fingers are flexed. In anatomy, Flexion is movement whereby bones or other objects are brought closer together. ... In metaphysics, extension is the property of taking up space; see Extension (metaphysics). ... In anatomy and physiology, adduction is the moving of limbs towards the midline of the body. ... // Introduction The movement of body structures is accomplished by the contraction of muscles. ... This article is being considered for deletion in accordance with Wikipedias deletion policy. ...


See also

The interphalangeal joints are hinge-joints in the digits (fingers and toes); each has a volar ligament and two collateral ligaments. ...

External links

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 University of Kansas (often referred to as KU or Kansas) is an institution of higher learning located in Lawrence, Kansas. ... 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. ... An illustration from the 1918 edition 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. ...


 
 

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