10-29-09A - Fingers Joints Intercarpal joints of the wrist...

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Unformatted text preview: Fingers Joints Intercarpal joints of the wrist and carpometacarpal (CMC) joint of the fingers Metacarpal phalangeal (MCP) joint of the fingers Proximal interphalangeal (P IP) and distal interphalangeal (D IP) joints of the fingers Joints of the Fingers Intercarpal joints of the wrist and carpometacarpal (CMC) joint of the fingers Classification : diarthrodial, gliding, arthrodial, nonaxial Articulating surfaces : adjacent carpal bones; distal row of carpal bones with the bases of the corresponding metacarpals (MC) Degrees of freedom of motion : zero or infinite Motions : slight wrist flexion/extension o Slight radial deviation/ulnar deviation Comments : There is little motion at each joint, but there are many joints. The intercarpal joints add to the wrist motion. The intercarpal joints produce little motion Joints of the fingers Metacarpal phalangeal (MCP) joint of the fingers Classification : diarthrodial, condyloid, oval, axial Articulating surfaces : head of the corresponding MC with the base of the corresponding proximal phalanges Degrees of freedom of motion : 2 Motions : MCP flexion/extension o MCP abduction/adduction Comments : Abduction is limited by the soft tissue between the fingers o The 3 rd finger , or middle finger is the midline of the hand so it doesnt abduct Joints of the Fingers Proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints of the fingers Classification : diarthrodial, ginglymus, hinge, axial Articulating surfaces : PIP head of the proximal phalanx with the base of themiddle phalanx; DIP head of the middle phalanx with the base of the distal phalanx Degrees of freedom of motion : 1 Motions : PIP and DIP flexion/extension Comments: none Muscles of the Fingers The fingers are supplied by extrinsic muscles muscles with the bellies in the forearm and intrinsic muscles muscles with the bellies in the hand Flexor Digitorum superfi...
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10-29-09A - Fingers Joints Intercarpal joints of the wrist...

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