ANAT 315 Chapter Notes - Chapter 4: Ulnar Nerve, Pronator Quadratus Muscle, Pronator Teres Muscle
16 Oct 2016
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Home to the muscles that flex the wrist and fingers. The median nerve innervates all of them (except for 1 and muscle) Most of them have a common origin (except?) = cfo = medial epicondyle + medial supracondylar ridge (of the humerus) Carpus = wrist, pollicis = thumb, digit = fingers. 3x groups of anterior muscles: superficial, intermediate, deep. Fpl (radius) and fdp (ulna) lie side by side on the bones and interosseous membrane. Pronators must originate on ulna and insert on radius. Only one of the group that does not cross the wrist. Half way down the lateral side of the shaft of the radius. Tendons crosses the wrist to insert on the bases of 2nd + 3rd metacarpals. Has a small pencil thin belly + long thin tendon that crosses the wrist. Passes right down the ulna to insert on the pisiform + hamate + base of 5th metacarpal (articulates w/ hamate)
