Anatomy and Cell Biology 3319 Lecture Notes - Lecture 29: Abdominal External Oblique Muscle, Spondylosis, Stretch Reflex
10 Jan 2017
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Jan 10 muscles of upper limb shoulder and arm. Movements: flexion, extension, adduction, abduction, medial rotation, lateral rotation, circumduction movements. Abduction and adduction around imaginary line in middle of hand vs body. Origin: clavicular head: anterior surface of medial clavicle, sternocostal head: ant. Surface of sternum, superior 6 costal cartilages, aponeurosis of external oblique. Insertion: lateral lip of intertubercular groove of humerus. Teres major (not minor minor is part of rotator cuff) Origin: posterior surface of inferior angle of scapula. Action: extends, adducts, and medially rotates arm, synergist with lat. Origin: spinous processes of inferior 6 thoracic vertebrae; thoracolumbar fascia (dense connective tissue pink in diagram), iliac crest and inf. The deltoid muscle (has 2 sets of fibers: anterior, medial and posterior) Origin: lateral clavicle (anterior), acromium and spine of scapula (posterior) Fibers: flexion and medial rotation, mid fibers: abducts arm, post fibers: extend and laterally rotates arm.
