Deep Posterior Pectoral Girdle

Question 1

Deltoid

Answer 1

Anterior
O: Lateral 1/3 of clavicle
I: Deltoid tuberosity
A: Flexion & internal rotation of humerus
N: Axillary n.

Middle
O: Acromion
I: Deltoid tuberosity
A: Abduction of humerus
N: Axillary n.

Posterior
O: Spine of scapula
I: Deltoid tuberosity
A: Extension, external rotation, horizontal abduction of humerus
N: Axillary n.

Question 2

Teres Major

Answer 2

O: Posterior aspect of inferior border of scapula
I: Crest of lesser tubercle of humerus
A: Adduction & internal rotation of humerus
N: Lower subscapular n.

Question 3

Supraspinatus

Answer 3

O: Supraspinous fossa
I: Greater tubercle of humerus
A: Abduction of humerus
N: Suprascapular n.

Question 4

Infraspinatus

Answer 4

O: Infraspinous fossa
I: Greater tubercle of humerus
A: External rotation, horizontal abduction of humerus
N: Suprascapular n.

Question 5

Teres Minor

Answer 5

O: Posterior aspect, superior 1/2 of lateral border of scapula
I: Greater tubercle of humerus
A: External rotation, horizontal abduction of humerus
N: Axillary n.

Question 6

Subscapularis

Answer 6

O: Subscapular fossa
I: Lesser tubercle of humerus
A: Internal rotation of humerus
N: Upper & lower subscapular n.