HN210 Lecture Notes - Lecture 5: Subclavius Muscle, Nuchal Ligament, External Occipital Protuberance
Document Summary
Proximal means it is close to your naval nerve) Allows for your face to turn (unilateral contraction) one side contracting then your head turns the other direction. A: turns face toward opposite side (uni)flex neck towards side of muscle (bi)flex neck raise clavicle and sternum to assist breathing. Allows for deep breathing and expansions of ribs. N: nerve to subclavius from brachial plexus. A: depress clavicle and help raise 1st rib when. I: inferior surface of clavicle (middle 1/3) clavicle raises; protects subclavian artery when clavicle fractures. Dominates posterior surface of upper surface and neck. O: medial part of superior nuchal line, ext occipital protuberance, ligamentum nuchal, spinous processes of c7-t12. I: spine od scapula, acromion lat 1/3 of clavicle. N: accessory (motor) nerve 11, c3 and c4 sensory a: (upper) elevate scapula and turn glenoid cavity up to raise hands above the head ; (lower ) depress scapula; (middle) retraction. O: comes off of the transverse processes of.
