Anterior Axioappendicular Muscles

Question 1

Pectoralis Major Origin-2

Answer 1

Clavicular head: Medial 1/2 of clavicle

Sternocostal head: Anterior surface of sternum, superior 6 costal cartilages, aponeurosis of external oblique

Question 2

Pectoralis Major Insertion

Answer 2

Lateral lip of intertubercular sulcus of humerus

Question 3

Pectoralis Major Innervation-2

Answer 3

Lateral (C5, C6, C7) and medial (C8, T1) pectoral nerves

Clavicular head- C5, C6
Sternocostal head- C7, C8, T1

Question 4

Pectoralis Major Action-2

Answer 4

• Adducts & medially rotates humerus

- Draws scapula anteriorly and inferiorly

Question 5

Pectoralis Minor Origin

Answer 5

3rd-5th ribs near costal cartilages

Question 6

Pectoralis Minor Insertion

Answer 6

Medial border & superior surface of coracoid process

Question 7

Pectoralis Minor Innervation

Answer 7

Medial Pectoral Nerve (C8, T1)

Question 8

Pectoralis Minor Action

Answer 8

Stabilizes scapula by drawing inferiorly and anteriorly against thoracic wall

Question 9

Subclavius Origin

Answer 9

Junction of 1st rib and its costal cartilage

Question 10

Subclavius Insertion

Answer 10

Inferior surface of middle third of clavicle

Question 11

Subclavius Innervation

Answer 11

Subclavian nerve (C5, C6)

Question 12

Subclavius Action

Answer 12

Anchors and depresses clavicle

Question 13

Serratus Anterior Origin

Answer 13

Lateral parts of 1st-8th ribs

Question 14

Serratus Anterior Insertion

Answer 14

Anterior surface of medial border of scapula

Question 15

Serratus Anterior Innervation

Answer 15

Long thoracic nerve (C5, C6, C7)

Question 16

Serratus Anterior Action-2

Answer 16

• Protracts scapula and holds against thoracic wall

- Rotates scapula