Anterior Axio- Appendicular Muscles

Question 0

Proximal and distal attachments of the pectorals major

Answer 0

P: clavicular head- anterior surface of medial half of clavicle
Sternocostal head - anterior surface of sternum, superior six costal cartilages, aponeurosis of external oblique muscle.
D: lateral lip of intertubular sulcus go humerus.

Question 1

What are the muscles of the anterior axio-appendicular muscles

Answer 1

Pectoralis major
Pectoralis minor
Sub-clavius
Serratus anterior

Question 2

Innervation of pectoralis major

Answer 2

Lateral and medial pectoral nerves
Clavicular head = (C5,C6)
Sternocostal head = ( C7, C8, T1)

Question 3

Main action of pec major

Answer 3

Addicts and medically rotates humerus
Draws scapula anteriorly and inferiorly

Acting alone- clavicular head flexes humorus and sternocostal head extends it from the fixed position

Question 4

Pectoralis minor proximal and distal attachments

Answer 4

P: 3-5 ribs near costal cartilages
D: medial border and superior surface of coracoid process of scapula

Question 5

Innervation of pec minor

Answer 5

Medial pectoral nerve ( C8, T1)

Question 6

Action of pec minor

Answer 6

Stabalizes scapula by drawing it inferior and anteriorly against thoracic wall

Question 7

Proximal and distal attachments of the subclavius

Answer 7

P: junction of fist rib and it’s costal cartilage
D: inferior surface of middle third of clavicle

Question 8

Innervation of subclavius

Answer 8

Nerve to subclavius (C5, C6)

Question 9

Action of subclavius

Answer 9

Anchors and depresses clavicle

Question 10

Proximal and distal attachments of the Serratus anterior

Answer 10

P: external surfaces of lateral parts of 1st-8th rib
D: anterior surface of medial border of scapula

Question 11

Innervation of Serratus anterior

Answer 11

Long thoracic nerve (C5, C6, C7)

Question 12

Action of Serratus anterior

Answer 12

Protracts scapula and holds it agains the thoracic wall

Rotates scapula