KINES 300 Lecture Notes - Lecture 18: Upper Extremity Of Humerus, Sternoclavicular Joint, Sagittal Plane
22 May 2020
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Document Summary
Doesn"t do flexion because horizontal and vertical fibers cancel out. 70% of oblique strains occur in internal oblique of non-dominant arm. Hip flexion, lumbar flexion, lateral lumbar flexion. Osteokinematics and arthrokinematics of ac, sc, gh and scapulothoracic joints. Slight wiggle motions in horizontal and sagittal plane, does not follow any concave/convex rules. Function: keep glenoid in optimal position to align with humeral head. Combination of movements from ac joint and sc joint. Elevation/depression: clavicle motion at sc joint, some ac rotation. Protraction/retraction: mainly sc rotation, some ac rotation. Upward/downward rotation: clavicle motion at sc, some ac rotation. Anterior/posterior tipping: anterior with full shoulder extension, posterior with full shoulder flexion. Primary movers for gh and scapulothoracic joints. Scapula elevation- upper traps, levator scapulae, some rhomboids. Scapula depression- lower traps, latissimus dorsi, pec minor, subclavius. Upward rotation of scapula- serratus anterior and trapezius.
