HLSC 2F95 Lecture Notes - Lecture 7: Teres Minor Muscle, Axillary Artery, Aortic Arch

• School: Brock University
• Department: Health Sciences
• Course: HLSC 2F95
• Professor: dr.macpherson

Document Summary

The intrinsic muscles provide fine- tuned control of the hand. Anterior muscles flex while posterior muscles extend. Abductors are on the sides of the arm. Innervates muscles of the pectoral girdle and upper limb. Peripheral nerves complex mixing of spinal nerves. Levels of mixing: roots, trunks, divisions, cords, branches: ventral rami root from spinal nerves c5 to t1 converge to form 3 trunks. Inferior (c8-t1: trunks split into 2 divisions. Medial anterior division of inferior trunk. Posterior 3 posterior divisions: cords of brachial plexus extend for form branches (peripheral nerves) Lateral cord extends to form the musculocutaneous nerve. Lateral & medial cord extends to form the median nerve. Medial cord extends to form the ulnar nerve. Posterior cord extends to form radial and axillary nerves. Ulnar (med/post/then ant) medial forearm and hand flexors. Median entrapment neuropathy: when the median nerve gets compressed, treated by wearing a splint to prevent flexion, or surgically cutting the retinaculum.