Intrinsic Back Muscles - Superficial Layer

Question 1

Splenius (Capitis, Cervicis)

2O, 1I (2 for capitus, 1 for cervicis), 1N, 2A

Answer 1

O:
+ nuchal ligament
+ spinous processes of C7-T6

I:
+ Splenius capitis:
+ Mastoid process of temporal bone
+ lateral third of superior nuchal line of occipital bone
+ Splenius cervicis: Tubercles of transverse processes of C1-C3 or C4

N:
+ posterior rami of spinal nerves

A:
Alone: Laterally flexes neck and rotates head to side of active muscles
Together: Extend head and neck