ZOO 3713C Lecture Notes - Lecture 1: Flexor Digitorum Profundus Muscle, Flexor Carpi Ulnaris Muscle, Flexor Pollicis Longus Muscle
Document Summary
Traction on the arm at birth or falling on the shoulder may damage the upper part of the plexus (roots may be pulled out of spinal cord) Signs: deltoid and supraspinatus are paralyzed (no arm abduction) Infraspinatus paralysis leads to medial rotation of the arm. Biceps and brachialis are also paralyzed (no elbow flexion) . Adductors of shoulder are mildly affected (pectoralis major and latissimus dorsi) Tendonopathy of the supraspinatus? usually from baseball calcification, pain tendon rupture if greater then 40 avulsion of the greater tub - younger people. Carpal tunnel syndrome compression of the median nerve in the tunnel, and is very painful due to hypothyroidism rheumatoid arthritis, pregnancy amyloidosis. Drop, due to damage of the radial nerve: lower brachial plexus lesion: Paralysis of the intrinsic muscle of hand (small muscles) with anesthesia. Results from sudden upward pull of the shoulder. Injury to c8-t1 roots following forced abduction of the shoulder.
