Wk 3: Posterior Neck Triangle

Question 1

Sternocleidomastoid

Answer 1

O: Sternal head- manubrium
Clavicular head- medial 1/3 of
clavicle
I: Mastoid process
A: Unilaterally- flexes head and neck
laterally, rotates head to opposite
side
Bilaterally- Flexion of inferior
cervical vertebrae, Extension of AO
joint
N: Accessory CN

Question 2

Splenius Capitis

Answer 2

O: Spinous process of C7-T3 & Ligamentum Nuchae
I: Mastoid process
A: Ipsilateral rotation of head, extension & lateral flexion of spine and head
N: Posterior rami middle (C1-C6)

Question 3

Posterior Scalene

Answer 3

O: Posterior tubercles of transverse processes of vertebrae C5-C7
I: Lateral surface of 2nd rib
A: elevation of 2nd rib and lateral flexion
N: Anterior rami of C6-C8

Question 4

Middle Scalene

Answer 4

O: Posterior tubercles of transverse process of vertebrae C2-C7
I: Upper surface of 1st rib
A: elevation of rib 1
N: anterior rami of C3-C8

Question 5

Anterior scalene

Answer 5

O: Anterior tubercles of tranverse processes of vertebrae C3-C6
I: Scalene tubercle on 1st rib
A: Elevation of 1st rib
N: anterior rami of C4-C6