Anatomy and Cell Biology 3319 Lecture Notes - Lecture 2: Aponeurosis, Iliac Crest, Bicipital Groove
23 Jun 2016
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Describe the 9 muscles that cross the shoulder joint and move the arm. Describe the attachments, functions and innervation of each muscle (text: table 11-11). Describe the anterior and posterior compartments of the arm and their muscular components, actions and innervation. Movements of the arm at the shoulder joint. Flexion extension adduction abduction medial rotation lateral rotation. Dw about spinal origins of innervation, just the nerve. Medial rotation is rotation towards the midline; lateral rotation is rotation away from midline. Circumduction is circular rotation of arms: pectoralis major. Surface of sternum, superior 6 costal cartilages, aponeurosis of external oblique. Origin: tip of coracoid process of scapula insertion: middle 1/3 of medial humerus action: flexes and. Origin: dorsal surface of inferior angle of scapula insertion: intertubercular groove of humerus action: Extends, adducts and medially rotates arm innervation: lower subscapular nerve (c6,c7: latissimus dorsi. Origin: spinous processes of inferior 6 thoracic vertebrae; thoracolumbar fascia, iliac crest and inf.
