VMED5123 Scapula and Shoulder mm.
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origin: The spine and acromial process of the scapula
insertion: The deltoid tuberosity
action: To flex the shoulder joint.
origin: The infraspinous fossa
insertion: A small, circumscribed area on the lateral side of the greater tubercle of the humerus .
- action: extend/flex shoulder joint
- abduct shoulder
- rotate brachium laterally
- laterally stabilize shoulder joint
*its tendon functions as a lateral collateral ligament of the shoulder
teres minor origin
origin: The infraglenoid tubercle and distal third of the caudal border of the scapula
teres minor insertion
insertion: The teres minor tuberosity of the humerus
teres minor action
action: To flex the shoulder joint, rotate the shoulder laterally, and prevent medial rotation when bearing weight
origin: The supraspinous fossa
insertion: The greater tubercle of the humerus, by a thick tendon
action: To extend and laterally stabilize the shoulder joint
origin: The subscapular fossa.
insertion: The lesser tubercle of the humerus
action: To adduct, extend, and medially stabilize the shoulder joint. To rotate the shoulder medially and prevent lateral rotation when bearing weight.
*distal part considered the medial collateral ligament of the shoulder joint
teres major origin
origin: The caudal angle and adjacent caudal border of the scapula; the caudal surface of the subscapularis.
teres major insertion
insertion: The teres major tuberosity of the humerus
teres major action
action: Flex the shoulder, rotate the shoulder medially, and prevent lateral rotation when weight bearing
origin:The coracoid process of the scapula
insertion: The crest of the lesser tubercle of the humerus proximal to the teres major tuberosity
action:To adduct, extend, and stabilize the shoulder joint.
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