Muscles Of Pectoral Region

Question 1

Pectoralis major m/s

Answer 1

O-clavicle, sternum & upper six ribs cartilage
I-Lateral lip of bicipital groove
(T major in medial lip)
N-Medial and lateral pectoral nerves
A-adducts arm/ rotates arm medially
Clavicle fibres also flex arm

Question 2

P.minor m/s

Answer 2

O-3rd,4th,5th ribs
I-coracoid process
N-medial pectoral nerve
A-depress the scapula

Question 3

Serratus anterior m/s

Answer 3

O-external surface of 1st to 8th ribs
I-Ant surface of medial border of scapula
N-Long thoracic nerve
A-protracts scapula and lateral rotation
Paralysis-winged scapula

Question 4

Subclavius m/s

Answer 4

N-nerve to subclavius