Superficial Intrinsic Back Muscles

Question 0

Splenius Cervicis

Answer 0

O: nuchal lig and spinous processes C7-T3 (or T4)
I: tubercles of transverse processes of C1-C3 (or C4)
N: post rami of spinal nerves
A: Unilaterally(alone)– lateral flexion of neck, ipsilateral head rotation
Bilaterally (together)– head and neck extension

Question 1

Splenius Capitis

Answer 1

O: nuchal lig and spinous processes C7-T3 (or T4)
I: mastoid process, lat superior nuchal line
N: post rami of spinal nerves
A: Unilaterally– lateral flexion of neck, ipsilateral head rotation
Bilaterally– head and neck extension