Pec major/minor, serratus anterior, subclavius, omohyoid

Question 1

Omohyoid origin

Answer 1

Superior border of scapular near suprascapular notch

Question 2

Omohyoid insertion

Answer 2

Inferior border of hyoid

Question 3

Omohyoid action

Answer 3

depresses, retracts, and steadies hyoid

Question 4

Omohyoid innervation

Answer 4

C1-C3 by a branch of ansa cervicalis

Question 5

Subclavius origin

Answer 5

Junction of 1st rib and its costal cartilage

Question 6

Subclavius insertion

Answer 6

Inferior surface of middle third of clavicle

Question 7

Subclavius action

Answer 7

Anchors and depresses clavicle

Question 8

Subclavius innervation

Answer 8

Subclavian nerve C5,6

Question 9

Serratus anterior Origin

Answer 9

External surfaces of lateral parts of 1-8th ribs

Question 10

Serratus anterior Insertion

Answer 10

anterior surface of medial border of scapula

Question 11

Serratus anterior Action

Answer 11

Protracts scapula and holds against thoracic wall, rotates scapula

Question 12

Serratus anterior innervation

Answer 12

Long thoracic nerve C5,6,7

Question 13

Pec. Minor origin

Answer 13

3-5th ribs near their costal cartilage

Question 14

Pec. minor insertion

Answer 14

Medial border and superior surface of coracoid process of scapular

Question 15

Pec. minor action

Answer 15

Stabilizes scapula by drawing inferiorly and anteriorly against thoracic wall

Question 16

Pec. minor innervation

Answer 16

Medial pectoral nerve C8, T1

Question 17

Pec major origin

Answer 17

Clavicular head- anterior surface of medial half of clavicle

Sternocostal- anterior surface of sternum, superior 6 costal cartilages, and aponeurosis of external oblique muscle

Question 18

Pec. major insertion

Answer 18

Lateral lip of intertubercular sulcus

Question 19

Pec. major action

Answer 19

Adducts, medially rotates shoulder joint, draws on scapula anteriorly and posteriorly
Clavicular head alone- flexes shoulder joint
Sternocostal head alone- extends shoulder joint, when should is flexed

Question 20

Pec. major innervation

Answer 20

Lateral and medial pectoral nerve, clavicular head C5,6 and sternocostal head C7, 8 T1