Grant's Ch. 2 - Axillary Muscles

Question 1

What muscle makes up the medial wall of the axilla?

Answer 1

Serratus anterior

Question 2

What 3 muscles make up the posterior wall of the axilla?

Answer 2

1) Subscapularis
2) Latissimus dorsi
3) Teres major

Question 3

What is the medial attachment of the serratus anterior?

Answer 3

Anterior surface of the medial border of the scapula

Question 4

What is the lateral attachment of the serratus anterior (NOTE: a range of ribs)?

Answer 4

Ribs 1-9 (lateral parts)

Question 5

List the 2 actions of the serratus anterior.

Answer 5

1) Rotate the glenoid cavity superiorly
2) Protract the scapula

Question 6

What innervates the serratus anterior?

Answer 6

Long thoracic n.

Question 7

What is the medial attachment of the subscapularis?

Answer 7

Subscapular fossa

Question 8

What is the lateral attachment of the subscapularis?

Answer 8

Lesser tubercle of the humerus

Question 9

What is the action of the subscapularis?

Answer 9

Medially rotate humerus

Question 10

What are the 2 innervations of the subscapularis?

Answer 10

Upper and lower subscapular nn.

Question 11

List the 2 medial attachments of the latissimus dorsi.

Answer 11

1) Thoracolumbar fascia
2) Iliac crest

Question 12

What is the lateral attachment of the latissimus dorsi?

Answer 12

Intertubercular groove (floor)

Question 13

List the 3 actions of the latissimus dorsi.

Answer 13

1) Extend humerus
2) Adduct humerus
3) Medially rotate humerus

Question 14

What innervates the latissimus dorsi?

Answer 14

Thoracodorsal n.

Question 15

What is the medial attachment of the teres major?

Answer 15

Inferior angle of scapula

Question 16

What is the lateral attachment of the teres major?

Answer 16

Medial lip of intertubercular sulcus

Question 17

List the 2 actions of the teres major.

Answer 17

1) Adduct humerus
2) Medially rotate humerus

Question 18

What innervates the teres major?

Answer 18

Lower subscapular n.