Muscles Of Posterior Wall Of Axilla OINA

Question 1

Subscapularis Origin

Answer 1

Medial 2/3 of subscapular fossa

Question 2

Subscapularis Insertion

Answer 2

Lesser tubercle of humerus

Question 3

Subscapularis Innervation

Answer 3

Upper & lower subscapular nerves (C5,C6,C7)

Question 4

Subscapularis Action

Answer 4

Rotator cuff muscle
Medial (internal) rotation of the arm at the glenohumeral joint

Question 5

Teres Major Origin

Answer 5

Elongate oval area on the posterior surface of the inferior angle of the scapula

Question 6

Teres Major Insertion

Answer 6

Medial lip of the intertubercular sulcus on the anterior surface of the humerus

Question 7

Teres Major Innervation

Answer 7

Lower subscapular nerve (C5,C6,C7)

Question 8

Teres Major Action

Answer 8

Medial (internal) rotation & extension of the arm at the glenohumeral joint

Question 9

Latissimus Dorsi Origin

Answer 9

Spinous processes of lower 6 thoracic vertebrae & related interspinous ligaments
Via the thoracolumbar fascia to the spinous processes of the lumbar vertebrae, related interspinous ligaments, & iliac crest
Lower 3-4 ribs

Question 10

Latissimus Dorsi Insertion

Answer 10

Floor of the intertubercular sulcus

Question 11

Latissimus Dorsi Innervation

Answer 11

Thoracodorsal nerve (C6,C7,C8)

Question 12

Latissimus Dorsi Action

Answer 12

Adduction, medial (internal) rotation, & extension of the arm at the glenohumeral joint