Main Model
Muscles : 51 Splenius capitis
Muscle: Splenius
Proximal Attachment: Nuchal ligament and spinous
processes of C7-T6 vertebrae
Distal Attachment:
Splenius capitis - fibers run
superolaterally to mastoid
process of temporal bone
and lateral third of superior
nuchal line of occipital bone
Splenius cervicis - tubercles
of transverse processes of
C1-C3 or C4 vertebrae
Innervation: Posterior rami of spinal
nerves
Main Action(s):
Acting alone - laterally flex
neck and rotate head to side
of active muscles
Acting together - extend head
and neck