Intermediate Layer

Question 1

Anterior Scalene

Answer 1

O: tvp C3-C6
I: first rib
A: elevate first rib, unilaterally lateral flexion of neck; bilaterally assist with forward neck flexion
N: cervical ventral rami (C1-3)

Question 2

Middle Scalene

Answer 2

O: tvp C2-C7
I: first rib
A: unilaterally lateral flexion of neck, elevates first rib
N: cervical ventral rami (C3-C8)

Question 3

Posterior scalene

Answer 3

O: tvp C4-C6
I: second rib
A: unilaterally lateral flex neck, elevate second rib
N: cervical ventral rami (C6-C8)

Question 4

Longus Capitis

Answer 4

O: anterior tubercle tvp C3-C6
I: inferior surface of basilar part of occipital bone
A: flexes neck; assists intersegmental stabilization
N: anterior rami C1-C3