BIOL1300 Lecture Notes - Palmar Aponeurosis, Posterior Interosseous Nerve, Infraspinatus Muscle
Document Summary
**combined with upward rotation of the scapula (scapulothoracic joint) after the first 30 degrees of abduction: 0-30 gh joint, 30-90 1:2 st joint:gh joint, >90 1:1 st:gh. Of the 180 degrees of rotation, 120 gh and 60 st. ***subacromial space is so limited that during full abduction of the arm we have to laterally rotate (sit, posterior deltoid) the humerus to move the greater tuberostiy out of the way. Acromioclavicular joint (plane type synovial) rotation of scapula on the clavicle. Sternoclavicular joint (saddle type synovial fnxl ball and socket) elev/dep; prot/retrac rotation about the long axis of clavicle abduction and m/l rotation. Coracoclavicular ligament (trapezium and conoid: elbow: humeroulnar and humeroradial joint, humeroulnar joint: hinge synovial, flex/extension, humeroradial joint: modified hinge synovial, flex/extension and supination/pronation. *humeroradial joint (modified hinge), proximal (radial notch of ulna) and distal (ulnar notch of radius) radioulnar joints (pivot synovial joints) **humeroulnar, humeroradial, proximal radioulnar joints share synovial capsule.
