What is the function of the semispinalis cervicis?

The function of semispinalis cervicis is to help the head and neck extensors to extend the head at the neck when contracting bilaterally. On the other hand, its unilateral contraction aids the same muscles to perform the ipsilateral lateral flexion and contralateral rotation of the head, cervical and thoracic spines.

Where is the spinalis thoracis located?

The spinalis thoracis muscle is part of the erector spinae muscle group located adjacent to the spine. This muscle is attached to the segments of the thoracic spine, which is adjacent to the shoulder blades.

What is the Semispinalis dorsi?

The semispinalis thoracis (or semispinalis dorsi) muscle consists of thin, narrow, fleshy fasciculi, interposed between tendons of considerable length. The semispinalis muscles are innervated by the dorsal rami of the cervical spinal nerves.

Where is the Semispinalis muscle?

semispinalis muscle, any of the deep muscles just to either side of the spine that arise from the transverse processes (side projections) of the lower vertebrae and reach upward across several vertebrae to insert at the spines of vertebrae farther up, except for the upper segment (semispinalis capitis), which inserts

What is the action of the semispinalis capitis?

Actions of the Semispinalis Capitis Muscle

extends and hyperextends the head and the neck. rotates the head and the neck to the side opposite the muscle.

What Innervates Interspinales?

The interspinales muscles are innervated by the medial branches of the posterior primary divisions of spinal nerves. The interspinales muscles function to extend the spine and may act as proprioceptive organs (Bogduk, 2005).

What is the function of spinalis?

spinalis muscle, any of the deep muscles of the back near the vertebral column that, as part of the erector spinae (sacrospinalis) muscle group, assist in extension (e.g., bending backward), lateral flexion (bending to the side), and rotation of the spine.

What is the splenius?

Splenius capitis is a thick, flat muscle at the posterior aspect of the neck arising from the midline and extending superolaterally to the cervical vertebrae and, along with the splenius cervicis, comprise the superficial layer of intrinsic back muscles.

What are the Intertransversarii muscles?

The intertransversarii muscles function to flex the spine laterally by approximating adjacent transverse processes. They also help to stabilize adjacent vertebrae during large spinal movements. The thoracic intertransversarii muscles are small and are usually only present in the lower thoracic region.

What is the Platysma muscle?

The platysma is a superficial muscle found in the neck. It covers most of the anterior and lateral aspect of the neck. The platysma is a broad muscle which arises from the fascia that covers the upper segments of the deltoid and pectoralis muscles.

What does the Semispinalis muscle do?

The semispinalis muscles work to extend your head, neck, and upper back. They also laterally flex your head and neck towards the ipsilateral (same side) of your body and turn your head, neck, and upper back towards the opposite side of your body.

Where is semispinalis capitis?

The semispinalis capitis, which is the largest and most prominent of the posterior neck muscles, arises from the transverse process of the upper thoracic spines and is inserted into the occiput below the superior nuchal line.

What is your cervicis?

Splenius cervicis is a paired back muscle found in the prevertebral space of the neck. Together with splenius capitis, it forms the superficial layer of the deep (intrinsic) back muscles, thus covering the other deep back muscles in the cervical region of the back.

Is semispinalis capitis superficial or deep?

The most superficial muscle in this group is the semispinalis muscle, spanning the thoracic and cervical regions of the vertebral column, with an attachment on the occipital bone of the skull. The semispinalis muscle has three parts: Semispinalis capitis.