splenius การใช้

The splenius capitis is deep to sternocleidomastoideus at the mastoid process, and to the trapezius for its lower portion.
The broad-surfaced occipital region at the back of the skull provides a large attachment area for the splenius capitis muscles of the neck.
The function of the splenius cervicis muscle is extension of the cervical spine, rotation to the ipsilateral side and lateral flexion to the ipsilateral side.
The recti laterales are concerned in the lateral movement, assisted by the trapezius, splenius capitis, semispinalis capitis, and the sternocleidomastoideus of the same side, all acting together.
The levator scapulae may lie deep to the sternocleidomastoideus at its origin, deep or adjacent to the splenius capitis at its origin and mid-portion, and deep to the trapezius in its lower portion.