Muscles Of Pectoral Region

Question 1

Which muscle is responsible for adducting and medially rotating the arm?

Answer 1

Pectoralis major

Question 2

True or False: The pectoralis minor is located deep to the pectoralis major.

Answer 2

True

Question 3

Which muscle is responsible for protracting the scapula?

Answer 3

Serratus anterior

Question 4

What is the function of the subclavius muscle?

Answer 4

Stabilizes and depresses the clavicle

Question 5

Which muscle is sometimes referred to as the ‘boxer’s muscle’?

Answer 5

Pectoralis major

Question 6

Which muscle originates from the ribs and inserts into the coracoid process of the scapula?

Answer 6

Pectoralis minor

Question 7

What is the action of the pectoralis major muscle?

Answer 7

Flexion, adduction, and medial rotation of the arm

Question 8

What is the innervation of the pectoralis major muscle?

Answer 8

Medial and lateral pectoral nerves (C5-T1)

Question 9

Which muscle is responsible for drawing the scapula forward and around the thorax?

Answer 9

Serratus anterior

Question 10

What is the function of the pectoralis minor muscle?

Answer 10

Protraction of the shoulder girdle
Depression of the shoulder
With fixed scapula, it can raise the ribs in forced inspiration

Question 11

True or False: The pectoralis minor muscle is larger and more superficial than the pectoralis major.

Answer 11

False

Question 12

Which muscle originates from the outer surface of ribs 1-8?

Answer 12

Serratus anterior

Question 13

What is the action of the serratus anterior muscle?

Answer 13

Protraction and upward rotation of the scapula

Question 14

What is the innervation of the pectoralis minor muscle?

Answer 14

Medial pectoral nerve (C8-T1)

Question 15

Which muscle is responsible for raising the ribs during forced inhalation?

Answer 15

Serratus anterior

Question 16

What is the insertion of the pectoralis major muscle?

Answer 16

Greater tubercle of the humerus

Question 17

What is the insertion of the pectoralis minor muscle?

Answer 17

Into the medial border and the upper surface of the coracoid process.

Question 18

Which muscle is responsible for stabilizing and depressing the clavicle during movements of the shoulder girdle?

Answer 18

Subclavius

Question 19

What is the innervation of the serratus anterior muscle?

Answer 19

Long thoracic nerve (C5-C7)

Question 20

True or False: The pectoralis major muscle is divided into clavicular and sternal heads.

Answer 20

True

Question 21

Which muscle is located deep to the pectoralis major and pectoralis minor muscles?

Answer 21

Subclavius

Question 22

What is the action of the subclavius muscle?

Answer 22

It steadies the clavicle thus preventing excessive movements of the shoulder girdle.

Question 23

Which muscle is responsible for stabilizing the scapula against the thorax?

Answer 23

Pectoralis minor

Question 24

What is the origin of the pectoralis major muscle?

Answer 24

1. Clavicular head: arises from the anterior surface of the medial 1/2 of the
   clavicle.
2. Sternocostal head: aroses from:
   . Anterior surface of the sternum
   . Front of the upper** 6 costal cartilages.**
   . Aponeurosis of external abdominal oblique muscle.

Question 25

The anterior wall of the axilla is formed by

Answer 25

Superficial layer: is formed by pectoralis major muscle.
2. Deep layer (the axillary septum), formed from above downwards by:
•subclavius
•clavi-pectoral fascia
•pectoralis minor
• Suspensory ligament of the axilla, attached below to the axillary
fascia (deep fascia in the base of axilla)
Anterior fold ofaxilla: is the lower border of the anteri

Question 26

Pectoralis major muscles has….heads:

Answer 26

2 clavicular head
Sternocostal head

Question 27

Innervation of pectoralis major

Answer 27

Lateral and medial pectoral nerves(from axilla)

Question 28

The pectoralis major muscle action: 1
2
3

Answer 28

1)the muscle adducts and medially rotates the arm
2) clavicular head flexes the arm
3) the sternocostal head extends the flexed arm and comes to work in swimming, rowing and climbing

Question 29

Insertion of pectoralis major muscle

Answer 29

Bilamina tendon into the lateral lip of the intertubercular (biceps) groove

Question 30

Pectoralis minor is …..the costal cartilages
Insertion:

Answer 30

Near
Coracoid process

Question 31

Nerve supply of pectoralis minor is

Answer 31

Medial pectoral nerve

Question 32

Pectoralis minor action is 1)
2)
3)

Answer 32

1)Protraction of the shoulder girdle
2) depression of the shoulder
3) with fixed scapula, it can raise the ribs in forced inspiration

Question 33

Muscle moves in front of the joint

Answer 33

Flexion

Question 34

Muscle moves behind the joint

Answer 34

Extension

Question 35

Muscle moves above the joint

Answer 35

Abduction

Question 36

Flexion

Answer 36

Fate7 3ala fate7

Question 37

Extension

Answer 37

8ame2 3ala 8ame2

Question 38

Muscle move below the joint

Answer 38

Adduction

Question 39

In front on the humerus

Answer 39

Medial rotation

Question 40

Behind the humerus

Answer 40

Lateral rotation

Question 41

Subclavius muscle origin

Answer 41

From the upper surface of the 1st costo-chondral junction

Question 42

Subclavius insertion

Answer 42

Into a groove on the lower surface of the middle third of the clavicle

Question 43

Innervation of subclavius

Answer 43

Nerve to subclavius (C5)

Question 44

Subclavius action

Answer 44

Steadies the clavicle thus preventing excessive movement of the shoulder girdle