Grant's Ch. 2 - Pectoral Muscles (P1)

Question 1

List the 3 muscles of the pectoral region.

Answer 1

1) Pectoralis major
2) Pectoralis minor
3) Subclavius

Question 2

List the 3 medial attachments of the pectoralis major.

Answer 2

1) Medial half of clavicle
2) Sternum
3) Costal cartilages 1-7

Question 3

What is the lateral attachment of the pectoralis major?

Answer 3

Lateral lip of intertubercular sulcus

Question 4

List the 3 actions of the pectoralis major (HINT: Humeral).

Answer 4

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

Question 5

What 2 nerves innervate the pectoralis major?

Answer 5

Medial & lateral pectoral nn.

Question 6

List the medial attachments of the pectoralis minor (NOTE: a range of ribs).

Answer 6

Ribs 3-5

Question 7

What is the lateral attachment of the pectoralis minor?

Answer 7

Coracoid process of the scapula

Question 8

List the 2 actions of the pectoralis minor.

Answer 8

1) Anteriorly tilt scapula
2) Depress scapula

Question 9

What innervates the pectoralis minor?

Answer 9

Medial pectoral n.

Question 10

What is the medial attachment of the subclavius (HINT: only a single rib; THE VERY TOP!!!)?

Answer 10

Rib 1

Question 11

What is the lateral attachment of the subclavius?

Answer 11

Clavicle

Question 12

List the 2 actions of the subclavius.

Answer 12

1) Depress clavicle
2) Stabilize SC joint

Question 13

What innervates the subclavius?

NOTE: it has no special/fancy name

Answer 13

Nerve to subclavius