Pectoral Region Muscles

Question 0

Pectoralis Major

Insertion

Answer 0

lateral lip of intertubercular groove of humerus

Question 1

Pectoralis Major

origin

Answer 1

1. clavicular head: anterior medial of clavicle
2. sternocostal head: anterior surface of the sternum and costal cartilage of ribs 1-7
3. aponeurosis of external obliques

Question 2

Pectoralis Major

Innervation

Answer 2

medial and later pectoral nerves

1. C5-C6 to the clavicle
2. C6, C7, C8, C11 to the sternal head

Question 3

Pectoralis minor

origin

Answer 3

anterior ribs 3-5

Question 4

Pectoralis Major

Functions

Answer 4

1. clavicular head: flexes from neutral to flexion
   medial rotates
   horizontally adducts at the GH joint
2. Sternocostal: obliquely adducts the arm to the opposite side

fixed insert: elevates thorax during forced inspiration

Question 5

Pectoralis Minor

insertion

Answer 5

coracoid process of scapula

Question 6

Pectoralis Minor

Innervation

Answer 6

medial pectoral nerve C8, T1

sometimes runs with lateral pectoral nerve as well
C5-C7

Question 7

Pectoralis Minor

Functions

Answer 7

Protraction of scapula
(medial border of scapula slides antero-laterally away from the midline along the thracic cavity)

Fixed insert: elevates ribs during forced inspiration

Question 8

Serratus Anterior

Origin

Answer 8

lateral aspect of ribs 1-9

Question 9

Serratus Anterior

insertion

Answer 9

medial, ventral border of the scapula

Question 10

Serratus Anterior

Innervation

Answer 10

long thoracic nerve

C5-C7

Question 11

Serratus Anterior

Functions

Answer 11

MAJOR PROTRACTOR

works together with the upper and lower traps to produce upward rotation of the scapula

Question 12

Subclavius

origin

Answer 12

1st rib junction of rib and costal cartilage

Question 13

Subclavius

innervation

Answer 13

nerve to subclavius

C5-C6

Question 14

Subclavius

insertion

Answer 14

groove for subclavius on inferior clavicle

Question 15

Pectoral Region:

Answer 15

anchors the limb to the trunk

Question 16

Subclavius

functions

Answer 16

provides support to the sternoclavicular joint
pulls clavicle medially

fixed insert: elevates first rib during forced inspiration

Question 17

Pectoral girdle

Answer 17

clavicle and scapula

Question 18

Superficial compartment

Answer 18

contains skin, superficial fascia, and breast

Question 19

deep compartment

Answer 19

contains muscles

associated neurovascular structures

Question 20

major blood supply

Answer 20

thoracoacromial artery

Question 21

axilla is:

Answer 21

major pathway for the transmission of major nerves and vessels passing between the neck and arm

Question 22

contents of axilla

Answer 22

axillary artery
axillary vein
nerves of the brachial plexus
lymphatics and lymph nodes
axillary breast tissue in females

Question 23

upper bony margins of axilla

Answer 23

lateral border of first rib
posterior surface of the clavicle
superior border of scapula

Question 24

clavipectoral triangle is:

Answer 24

depression between pectoralis major, deltoid, and clavicle

Question 26

venous drainage is

Answer 26

runs superficial to deep

distal to proximal

Question 27

3 things attach to coracoid process

Answer 27

1. short bicep
2. pec minor
3. coracoidbrachialis

Question 28

Pec Major blood supply

Answer 28

thoracoacromial artery

Question 29

anterior wall of axilla

Answer 29

pec major

Question 30

poster wall of axilla

Answer 30

lats

Question 31

drains blood from the extermity

Answer 31

cephalic vein

Question 32

cephalic vein empties into

Answer 32

the axillary vein