Health Sciences 2300A/B Lecture Notes - Lecture 11: Ulna, Coracoid Process, Median Nerve

• School: Western University
• Department: Health Sciences
• Course: Health Sciences 2300A/B
• Professor: Gillian Gabriela Corbo

Document Summary

Lecture 11 muscles and nerves of the upper limb i. Axilla brachial plexus and axillary artery travel through here. Very important structures pass through them (i. e. Subclavius acts on clavicle and pectoralis major and latissimus dorsi act on the arm. All other muscles act on the scapula. Must know that these nerves branch off of the brachial plexus. Innervation is not from the brachial plexus. Composed of superior, middle and inferior fibers. Strengthen turn head to the side, shrug. Biceptall groove is the intertubercular sulcus (can be used interchangeably) Stretch bring arm over your head, pullups (exercise) Shrug, turn your head to the side. Two separate muscles, but thought of as one muscle. Minor is thin in comparison to the major. Has two innervations due to its size. Don"t have good motor control of that muscle. People who have rounded shoulders have a tight pectoralis minor. Important muscle in anchoring scapula to thoracic wall.