Ventral muscles of the pectoral girdle

Question 1

Origin: Pectoralis major?

Answer 1

Clavicular head - ant of med 1/2 clavicle

Sternocostal head - ant sternum, 1-7 costal cartilages, EO aponeurosis

Question 2

Insertion: Pectoralis major?

Answer 2

Lat lip of intertubercular sulcus

Question 3

Innervation: Pectoralis major?

Answer 3

Med and lat pectoral nerves

Question 4

Function: Pectoralis major?

Answer 4

Flexion and adduction

clavicular - flexion of extended arm, sternocostal - extension of flexed arm

Question 5

Origin: Pectoralis minor?

Answer 5

Ant surface of ribs 3-5

Question 6

Insertion: Pectoralis minor?

Answer 6

Coracoid process (scapula)

Question 7

Innervation: Pectoralis minor?

Answer 7

Med pectoral nerve (C5-T1)

Question 8

Function: Pectoralis minor?

Answer 8

Pulls down tip of shoulder and protracts scapula

Question 9

Origin: Serratus anterior?

Answer 9

Lat surface of upper 8-9 ribs

Question 10

Insertion: Serratus anterior?

Answer 10

Costal (ant) surface of med border of scapula

Question 11

Innervation: Serratus anterior?

Answer 11

Long thoracic nerve (c5-7)

WINGS OF HEAVEN

Question 12

Function: Serratus anterior?

Answer 12

Protraction of scapula

Keeps scapula opposed on thoracic wall

Question 13

Origin: subclavius?

Answer 13

1st rib (& junction between rib/cartilage)

Question 14

Insertion: subclavius?

Answer 14

Groove on inf surface of mid 1/3 of clavicle

Question 15

Innervation: subclavius?

Answer 15

Subclavian nerve (C5,C6)

Question 16

Function: subclavius?

Answer 16

Pulls tip of shoulder down

Protracts scapula