Located in the neck (Around the Cervical Vertebrae levels of C1 [Atlas] to C3)
Just above the splenius cervicis
And it helps support the skull
It's the splenius capitis.
sternocleidomastoid
semispinalis capitis splenius capitis longismuss capitis spinalis capitis trapezius
Splenius Capitis: for Part A on page 155 of the Holes bio book
2I have found that cervical traction is effective in eliminating splenius capitis pain and neck cracking.
sternocleidomastoid, splenius capitis, semispinalis capitis
The splenius muscles, which include the splenius capitis and splenius cervicis, have distinct insertions. The splenius capitis inserts on the mastoid process of the temporal bone and the lateral third of the superior nuchal line of the occipital bone. The splenius cervicis inserts on the transverse processes of the upper cervical vertebrae, specifically C1 to C3 or C4. These muscles primarily function to extend, rotate, and laterally flex the neck.
What are the antagonist of sternocleidomastiod muscle?
The neck extensors are the group of muscles located on the back of the neck that help to extend (tilt backward) the head and neck. These muscles include the splenius capitis, semispinalis capitis, and the upper portion of the trapezius. Strengthening these muscles can help improve posture and reduce neck pain.
The sternocleidomastoid muscles are the major muscles that assist you in flexing the neck, along with the longus capitis and a few other small deep muscles of the anterior neck. These flex the neck and head forward or anteriorly. The splenius capitis, semispinalis capitis and longissimus capitis are the major extensor muscles of the neck. These extend the neck upward and backward or posteriorly.
Posterior Belly of Digastric Muscle (innervated by CN VII) Facial nerve Sternocleidomastoid (innervated by CN XI) Spinal accessory nerve Longissimus Capitis (innervated by dorsal rami of C3-C8 spinal nerves) Splenius Capitis (innervated by dorsal rami of middle cervical spinal nerves)
The splenius capitis muscle allows you to look up. This muscle is located at the back of the neck and helps to extend and rotate the head.