Pec major/minor, serratus anterior, subclavius, omohyoid Flashcards Preview

Anatomy course (Back) > Pec major/minor, serratus anterior, subclavius, omohyoid > Flashcards

Flashcards in Pec major/minor, serratus anterior, subclavius, omohyoid Deck (20)
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1
Q

Omohyoid origin

A

Superior border of scapular near suprascapular notch

2
Q

Omohyoid insertion

A

Inferior border of hyoid

3
Q

Omohyoid action

A

depresses, retracts, and steadies hyoid

4
Q

Omohyoid innervation

A

C1-C3 by a branch of ansa cervicalis

5
Q

Subclavius origin

A

Junction of 1st rib and its costal cartilage

6
Q

Subclavius insertion

A

Inferior surface of middle third of clavicle

7
Q

Subclavius action

A

Anchors and depresses clavicle

8
Q

Subclavius innervation

A

Subclavian nerve C5,6

9
Q

Serratus anterior Origin

A

External surfaces of lateral parts of 1-8th ribs

10
Q

Serratus anterior Insertion

A

anterior surface of medial border of scapula

11
Q

Serratus anterior Action

A

Protracts scapula and holds against thoracic wall, rotates scapula

12
Q

Serratus anterior innervation

A

Long thoracic nerve C5,6,7

13
Q

Pec. Minor origin

A

3-5th ribs near their costal cartilage

14
Q

Pec. minor insertion

A

Medial border and superior surface of coracoid process of scapular

15
Q

Pec. minor action

A

Stabilizes scapula by drawing inferiorly and anteriorly against thoracic wall

16
Q

Pec. minor innervation

A

Medial pectoral nerve C8, T1

17
Q

Pec major origin

A

Clavicular head- anterior surface of medial half of clavicle

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

18
Q

Pec. major insertion

A

Lateral lip of intertubercular sulcus

19
Q

Pec. major action

A

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

20
Q

Pec. major innervation

A

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