Muscles of the Anterior Shoulder Girdle

Question 1

Name the Origin, Insertion, Action, and Nerve for:

Sternocleidomastoid

Answer 1

O: Manubrium & Medial 1/3 Clavicle

I: Mastoid process & Superior nuchal line

A: Ipsi Lat Flex, Contra Rot, Ext C/S

N: CN XI & Ventral Rami C1-C2

Question 2

Name the Origin, Insertion, Action, and Nerve for:

Subclavius

Answer 2

O: Superior surface of 1st Rib

I: Inf surface of clavicle (lateral 1/3)

A: Stabilizes Clavicle

N: Nerve to subclavius

Question 3

Name the Origin, Insertion, Action, and Nerve for:

Pectoralis Minor

Answer 3

O: Ant Surface Ribs 3-5

I: Coracoid Process scapula

A: Ant tip, ABD, Down Rot, Depression Scapula

N: Medial & Lateral Pectoral N

Question 4

Name the Origin, Insertion, Action, and Nerve for:

Serratus Anterior Superior

Answer 4

O: Lat Surface Ribs 1-5

I: Medial border scapula (superior angle)

A: ABD, Down Rot, Elevates, Stabilizes med border of scapula

N: Long Thoracic N

Question 5

Name the Origin, Insertion, Action, and Nerve for:

Serratus Anterior Inferior

Answer 5

O: Lat Surface Ribs 5-9

I: Medial Border scapula (inferior angle)

A: ABD, Up Rot, Depression, Stabilizes med border of scapula

N: Long Thoracic N