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Posterior Muscles of Human Trunk
Posterior Muscles of Human Trunk
27
Biology
Undergraduate 4
03/27/2014

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Term
Trapezius :: Origin
Definition
Occipital bone, spine of C7 and all thoracic vertebrae
Term
Trapezius :: Insertion
Definition
Lateral clavicle, acromion & spine of scapula
Term
Trapezius :: Action
Definition
Raises, rotates and retracts scapula; Neck Extension
Term
Latissimus dorsi :: Origin
Definition
Spinous processes of T7-L5, last 4 ribs and iliac crest
Term
Latissimus dorsi :: Insertion
Definition
Intertubercular sulcus of humerus
Term
Latissimus dorsi :: Action
Definition
Extends, adducts, shoulder; medially rotates humerus
Term
Infraspinatus :: Origin
Definition
Infraspinous fossa of scapula
Term
Infraspinatus :: Insertion
Definition
Greater tubercle of humerus
Term
Infraspinatus :: Action
Definition
Lateral rotation of humerus; stabilizes shoulder
Term
Teres major :: Origin
Definition
Posterior surface at inferior angle of scapula
Term
Teres major :: Insertion
Definition
Intertubercular sulcus of humerus
Term
Teres major :: Action
Definition
Extends, adducts shoulder; medially rotates humerus
Term
Teres minor :: Origin
Definition
Lateral margin of scapula
Term
Teres minor :: Insertion
Definition
Greater tubercle of humerus
Term
Teres minor :: Action
Definition
Lateral rotation of shoulder
Term
Rhomboid major :: Origin
Definition
Spinous processes of T2-T5
Term
Rhomboid major :: Insertion
Definition
Medial border of scapula
Term
Rhomboid major :: Action
Definition
Adducts, retracts, elevates and rotates scapula
Term
Rhomboid minor :: Origin
Definition
Spinous processes of C7 and T1
Term
Rhomboid minor :: Insertion
Definition
Medial border of scapula
Term
Rhomboid minor :: Action
Definition
Retracts and stabilizes scapula
Term
Subscapularis :: Origin
Definition
Subscapular fossa of scapula
Term
Subscapularis :: Insertion
Definition
Lesser tubercle of humerus
Term
Subscapularis :: Action
Definition
Medially rotates and stabilizes humerus
Term
Supraspinatus :: Origin
Definition
Supraspinous fossa of scapula
Term
Supraspinatus :: Insertion
Definition
Greater tubercle of humerus
Term
Supraspinatus :: Action
Definition
Abducts humerus and stabilizes shoulder
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