BIOS1168 Lecture Notes - Lecture 7: Flexor Pollicis Muscle, Metacarpal Bones, Pisiform Bone
31 Jul 2018
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Distal row = trapezium, trapezoid, capitate, hamate. Carpometacarpal joints = these are also synovial joints and plane. Carpometacarpal joint 1 = this is a saddle and synovial joint, allows flexion, extension, abduction and adduction as well as opposition. Flexor retinaculum = it is located on the proximal hand and is attached to the carpal bones, it forms the roof of the carpal tunnel. Extensor retinaculum = this is located on the posterior of the distal forearm and limits dorsal movement of the extensor tendons. Palmer aponeurosis = superficial layer of the hand, limits the movement of the skin. Fibrous flexor sheath = palmer aspect of the digits, lies over the tendons of flexors and limits anterior and lateral movement. Dorsal digital expansion = attach along with the lumbricals and the interossei and results in the extension of the digits, they act to help flex the mcpj and extend the ipj.
