PHTY101 Lecture Notes - Lecture 4: Musculocutaneous Nerve, Axillary Nerve, Lateral Cord
Document Summary
Trunks: upper- c5 and 6 form upper trunk, middle- c7 forms middle, lower- c8 and t1 form lower trunk. Divisions: (6: posterior division: extensor muscles, anterior division: flexor muscles. Cords: (3: lateral: anterior division of upper merges with anterior division of middle to form lateral cord, posterior: all three posterior divisions merge to form posterior cord, medial: anterior division of lower trunk forms medial cord. Terminal branches/ named nerves: musculocutaneous nerve: input from lateral, median nerve: input from booth medial and lateral cords, ulnar nerve: input from medial, axillary nerve: posterior, radial nerve: posterior. All upper limb extensors, brachioradialis, supinator, abd pl. Skin of posterior arm, forearm and hand, wrist and elbow joints. Skin of lateral forearm to base of thumb, elbow joint. Skin of lateral 3 digits ad corresponding palm, wrist and elbow joints. Dm, fdm, opp dm, medial 2 lumbricals, add poll, interossei. Skin of medial 1 digits ad corresponding palm, wrist joint.
