Anterior Axio-Appendicular Muscles

Question 0

Pectoralis Major Insertion?

Answer 0

Lateral tip of inter-tubercular sulcus 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 six costal cartilages, aponeurosis of external oblique muscle

Question 2

Innervation of Pectoralis major?

Answer 2

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

Question 3

Actions of Pectoralis major?

Answer 3

Adducts and medially rotates shoulder joint, draws scapula anteriorly and inferiorly
Acting alone, clavicular head flexes shoulder joint and sternocostal head extends in from the 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

Innervation of pectoralis minor?

Answer 6

Medial pectoral nerve (C8, T1)

Question 7

Action of Pectoralis Minor?

Answer 7

Stabilizes scapula by drawing inferiorly and anteriorly against thoracic wall

Question 8

Subclavius Origin?

Answer 8

Junction of 1st rub and its costal cartilage

Question 9

Subclavius insertion?

Answer 9

Inferior surface of miiddle third of clavicle

Question 10

Innervation of Subclavius?

Answer 10

Subclavian nerve (C5, C6)

Question 11

Action of subclavius?

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 of scapula

Question 14

Innervation of serratus anterior?

Answer 14

Long thoracic nerve (C5, C6, C7)

Question 15

Actions of Serratus anterior?

Answer 15

protracts scapula and hold against thoracic wall; rotates scapula