Action of the sternocleidomastoid
Contractions of both flexes the cervical vertebrae and extends head; contraction of one, laterally flexes the neck and rotates face in opposite direction: head rotation, tilt.
origin of the sternocleidomastoid
insertion of the sternocleidomastoid
mastoid process of temporal bone.
location of the sternocleidomastoid
anterior and lateral neck.
Action of the scalenes
head rotation, tilt
Origin of the Scalenes
transverse processes of vertebrae C1-C6
insertion of the Scalenes
location of the Scalenes
deep to sternocleidomastoid on the lateral neck.
nerve of the Scalenes
Action of the splenius capitis
extends head and neck.
origin of the splenius capitis
insertion of the Splenius Capitis
Superior nuchal line and mastoid process of occipital bone.
Location of the Splenius Capitis
nerve of the Splenius Capitis