Muscles Of Posterior Scapular Region OINA Flashcards
Supraspinatus Origin
Medial 2/3 of the supraspinous fossa of the scapula & the deep fascia that covers the muscle
Supraspinatus Insertion
Most superior facet on the greater tubercle of the humerus
Supraspinatus Innervation
Suprascapular nerve (C5, C6)
Supraspinatus Action
Rotator cuff muscle
Participates in abduction of the glenohumeral joint
Stabilization of the glenohumeral joint
Infraspinatus Origin
Medial 2/3 of the infraspinous fossa of the scapula & the deep fascia that covers the muscle
Infraspinatus Insertion
Middle facet on posterior surface of the greater tubercle of the humerus
Infraspinatus Innervation
Suprascapular nerve (C5, C6)
Infraspinatus Action
Rotator cuff muscle
Lateral (external) rotation at the glenohumeral joint
Stabilization of the glenohumeral joint
Teres Minor Origin
Upper 2/3 of a flattened strip of bone on the posterior surface of the scapula immediately adjacent to the lateral border of the scapula
Teres Minor Insertion
Inferior facet on the posterior surface of the greater tubercle of the humerus
Teres Minor Innervation
Axillary nerve (C5,C6)
Teres Minor Action
Rotator cuff muscle
Lateral (external) rotation of the glenohumeral joint
Stabilization of the glenohumeral joint
Teres Major Origin
Elongate oval area on the posterior surface of the inferior angle of the scapula
Teres Major Insertion
Medial lip of the intertubercular sulcus on the anterior surface of the humerus
Teres Major Innervation
Inferior subscapular nerve (C5,C6,C7)
