Muscles Of Thorax And Back

Question 1

What is the insertion of serratus anterior?

Answer 1

Medial margin of costal surface of scapula

Question 2

What is the action of serratus anterior?

Answer 2

Lateral rotation of scapula
Draws scapula medially and forwards
Adduction of arm
Elevation of ribs

Question 3

What is the nerve supply to serratus anterior?

Answer 3

Long thoracic nerve

Question 4

What is the arterial supply to serratus anterior?

Answer 4

Lateral thoracic artery

Question 5

What is the origin of pectoralis minor?

Answer 5

Ribs 3-5

Question 6

What is the insertion of pectoralis minor?

Answer 6

Coracoid process of scapula

Question 7

What is the action of pectoralis minor?

Answer 7

Pulls scapula medially, forwards and downwards

Question 8

What is the nerve supply to pectoralis minor?

Answer 8

Medial and lateral pectoral nerves

Question 9

What is the arterial supply to pectoralis minor?

Answer 9

Thoracoacromial artery

Question 10

What is the origin of pectoralis major?

Answer 10

Clavicle, sternum and ribs 1-6

Question 11

What is the insertion of pectoralis major?

Answer 11

Greater tubercle of humerus

Question 12

What are the actions of pectoralis major?

Answer 12

Adduction, medial rotation and flexion of arm

Question 13

What is the nerve supply to pectoralis major?

Answer 13

Medial and lateral pectoral nerves

Question 14

What is the arterial supply to pectoralis major?

Answer 14

Thoracoacromial artery

Question 15

What are the actions of the trapezius?

Answer 15

Retraction, superior rotation, elevation and depression of scapula

Question 16

What are the actions of latissimus dorsi?

Answer 16

Extension, adduction and medial rotation of the arm

Question 17

What is the origin of serratus anterior?

Answer 17

Ribs 1-9

Question 18

What are the actions of the rhomboids?

Answer 18

Retract scapula and rotate scapula