Anterior Axio-Appendicular Muscles

Question 0

Pectoralis Major Insertion

Answer 0

Lateral hip of intertubercular sulcus (groove) of humerus

Question 1

Pectoralis Major Origin

Answer 1

Clavicular head: anterior surface of medial half of clavicle

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

Question 2

Pectoralis Major Innervation

Answer 2

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

Question 3

Pectoralis Major Action

Answer 3

Adducts and medially rotates shoulder joint, draws scapula anteriorly and inferiorly

Acting alone: clavicular head flexes shoulder joint and sternocostal head extends it from flexed position

Question 4

Pectoralis Minor Origin

Answer 4

3rd-5th ribs near their costal cartilages

Question 5

Pectoralis Minor Insertion

Answer 5

Medial border and superior surface of coracoid process of scapula

Question 6

Pectoralis Minor Innervation

Answer 6

Medial pectoral nerve (C8, T1)

Question 7

Pectoralis Minor Actions

Answer 7

Stabilizes scapula by drawing inferiorly and anteriorly against thoracic wall

Question 8

Subclavius Origin

Answer 8

Junction of 1st ribb and its costal cartilage

Question 9

Subclavius Insertion

Answer 9

Inferior surface of middle third of clavicle

Question 10

Subclavius Innervation

Answer 10

Subclavian Nerve (C5, C6)

Question 11

Subclavius Action

Answer 11

anchors and depresses clavicle

Question 12

Serratus Anterior Origin

Answer 12

External surfaces of lateral part of 1st-8th ribs

Question 13

Serratus anterior insertion

Answer 13

anterior surface of medial border or scapula

Question 14

Serratus anterior innervation

Answer 14

long thoracic nerve (C5, C6, C7)

Question 15

Serratus anterior action

Answer 15

Protracts scapula and holds against thoracic walll; rotates scapula