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Muscles Acting on the Humerus and Shoulder
N/A
27
Anatomy
Undergraduate 1
10/29/2013

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Cards

Term
Pectoralis major - Origin
Definition
Medial clavicle; Lateral sternum; Costal cartilages R1 - R7; Aponeurosis of external oblique
Term
Pectoralis major - Insertion
Definition
Intertubercular sulcus of humerus
Term
Pectoralis major - Action
Definition
Flex, adduct, medially rotate shoulder
Term
Latissimus dorsi - Origin
Definition
T7 - L5; R9 - R12; Iliac crest; Thoracolumbar fascia
Term
Latissimus dorsi - Insertion
Definition
Intertubercular sulcus of humerus
Term
Latissimus dorsi - Action
Definition
Extend, adduct, medially rotate shoulder
Term
Deltoid - Origin
Definition
Acromion, spine of scapula; clavicle
Term
Deltoid - Insertion
Definition
Deltoid tuberosity of humerus
Term
Deltoid - Action
Definition
Abduct shoulder; Flex, medially rotate shoulder; Extend, laterally rotate shoulder
Term
Teres major - Origin
Definition
Inferior angle of scapula
Term
Teres major - Insertion
Definition
Intertubercular sulcus of humerus
Term
Teres major - Action
Definition
Extend, medially rotate shoulder
Term
Coracobrachialis - Origin
Definition
Coracoid process of scapula
Term
Coracobrachialis - Insertion
Definition
Medial shaft of humerus
Term
Coracobrachialis - Action
Definition
Flex, medially rotate shoulder
Term
Supraspinatus - Origin
Definition
Supraspinous fossa of scapula
Term
Supraspinatus - Insertion
Definition
Greater tubercle of humerus
Term
Supraspinatus - Action
Definition
Abduct shoulder
Term
Infraspinatus - Origin
Definition
Infraspinous fossa of scapula
Term
Infraspinatus - Insertion
Definition
Greater tubercle of humerus
Term
Infraspinatus - Action
Definition
Laterally rotate shoulder
Term
Teres minor - Origin
Definition
Lateral border and posterior surface of scapula
Term
Teres minor - Insertion
Definition
Greater tubercle of humerus
Term
Teres minor - Action
Definition
Laterally rotate shoulder
Term
Subscapularis - Origin
Definition
Subscapular fossa of scapula
Term
Subscapularis - Insertion
Definition
Lesser tubercle of humerus
Term
Subscapularis - Action
Definition
Medially rotate shoulder
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