anterior axio-appendicular muscles

Question 1

what are attachments of pec major?

Answer 1

proximal attachment of clavicular head: anterior surface of medial half of clavicle.
proximal attachment of sternocostal head: anterior surface of sternum and superior 6 costal cartilages.
distal: lateral lip of intertubucular sulcus of humerus.

Question 2

what is the action and innervation of pectoralis minor?

Answer 2

action: stabilises scapula by drawing in inferiorly and anteriorly against thoracic wall.
innervation: medial pectoral nerve.

Question 3

where does pectoralis minor attach?

Answer 3

proximal: third and fifth ribs near costal cartilages.
distal: medial border and superior surface of coracoid process of scapula.

Question 4

what is the action and innervation of sub-clavius?

Answer 4

action: anchors and depresses clavicle.
innervation: nerve to sub-clavius.

Question 5

what is the action and innervation of serratus anterior?

Answer 5

action: protects scapula and holds it against thoracic wall, rotates scapula.
innervation: SALT long thoracic nerve.

Question 6

where does serratus anterior attach?

Answer 6

proximal: lateral parts of 1-8 ribs.
distal: anterior surface of medial border of scapula.

Question 7

what is the action and innervation of pectoralis major?

Answer 7

action: adducts and medially rotates humerus, draws scapula anteriorly and inferiorly.
innervation: lateral and medial pectoral nerves.