Muscles Connecting the Upper Limb to the Thoracic Wall : OINA

Question 1

Pectoralis Major: Origin

Answer 1

Clavicle, sternum, upper 6 costal cartilages

Question 2

Pectoralis Minor: Origin

Answer 2

3rd-5th ribs

Question 3

Subclavius: Origin

Answer 3

1st costal cartilage

Question 4

Serratus Anterior: Origin

Answer 4

Upper eight ribs

Question 5

Pectoralis Major: Insertion

Answer 5

Lateral lip of bicipital groove of humerus

Question 6

Pectoralis Minor: Insertion

Answer 6

Coracoid process of scapula

Question 7

Subclavius: Insertion

Answer 7

Clavicle

Question 8

Serratus Anterior: Insertion

Answer 8

Medial border and inferior angle of scapula

Question 9

Pectoralis Major: Innervation

Answer 9

Medial and lateral pectoral nerves from brachial plexus; C5,6,7,8; T1

Question 10

Pectoralis Minor: Innervation

Answer 10

Medial pectoral nerve from brachial plexus; C6,7,8

Question 11

Subclavius: Innervation

Answer 11

Nerve to subclavius from upper trunk of brachial plexus; C5,6

Question 12

Serratus Anterior: Innervation

Answer 12

Long thoracic nerve; C5,6,7

Question 13

Pectoralis Major: Action

Answer 13

Adducts arms and rotates it medially

Question 14

Pectoralis Minor: Action

Answer 14

Depresses point of shoulder; elevates ribs of origin

Question 15

Subclavius: Action

Answer 15

Depresses the clavicle and steadies it

Question 16

Serratus Anterior: Action

Answer 16

Rotates scapula; draws the forward anterior around the thoracic wall