Superficial layer of intrinsics

Question 1

Splenius Capitis

Answer 1

O: ligamentum nuchae and spinous process of C7-T3
I: mastoid process, occipital bone
A: rotate head and neck to same side, neck and head extension
N: dorsal primary rami

Question 2

Splenius Cervicis

Answer 2

O: spinous process T3-T6
I: transverse process C1-C4
A: rotate head and neck to same side, extend head and neck
N: dorsal primary rami