What is the action of the splenius cervicis?
Musculus splenius cervicis is one of the deep (or intrinsic) muscles of the cervical and thoracic spine. Its fibres run superiorly and laterally. It assists in ipsilateral cervical side flexion and rotation, when both splenius cervicis muscles contract they extend the cervical spine.
What is the primary action of the splenius muscles?
The function of the splenius cervicis is to coordinate the position of the head and neck during various body movements, such as standing up from a sitting position. It does so by producing the lateral flexion, rotation and extension of the neck.
What is the splenius capitis muscle used for?
Splenius capitis assists in supporting the head in the erect position. Acting unilaterally: lateral flexion of the head and neck and rotation the head to the same side (when working synergistically with sternocleidomastoid).
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 artery supplies the Splenius Cervicis?
Blood supply The splenius cervicis is supplied by the occipital or transverse cervical arteries.
What is the origin insertion and action of the Semispinalis Cervicis?
The main anatomical feature of the semispinalis muscle, and of the semispinalis cervicis, is that it attaches between the spinous and transverse processes of vertebrae, bridging five to six vertebral levels along its course….Semispinalis cervicis muscle.
| Origin | Transverse processes of vertebrae T1-T6 |
|---|---|
| Insertion | Spinous processes of vertebrae C2-C5 |
When the splenius capitis the resulting movement is?
When the left and right splenius capitis contract together, the resulting movement is: extension of the neck. The most laterally placed of the three erector spinae components, the ___________ group, is composed of three parts: cervical, thoracic, and lumbar.
How do you get splenius capitis?
These two muscles are located at the back of your neck and reach from the cervical to the thoracic spine. The splenius capitis muscle attaches at the mastoid process, the occipital bone, the cervical spine as well as at the thoracic spine.
What does splenius mean in anatomy?
Definition of splenius : either of two flat oblique muscles on each side of the back of the neck and upper thoracic region.
What are the functions of splenius capitis and semispinalis capitis?
Therefore, splenius capitis acts as a shaker of the head. Other muscles that extend and rotate the head include semispinalis capitis and semispinalis cervicis, which also flex the head laterally. The superior portion of trapezius also acts as a lateral flexor of the neck.
What Innervates semispinalis capitis?
Semispinalis capitis muscle receives its innervation through the greater occipital nerve (posterior ramus of C2 spinal nerve) and spinal nerve C3. Blood supply comes from the occipital artery that arises from the external carotid artery.
What nerve Innervates the Splenius Cervicis?
| Splenius cervicis muscle | |
|---|---|
| Insertion | Transverse processes of C1-C3 |
| Artery | Transverse cervical artery and occipital artery |
| Nerve | Posterior rami of the lower Cervical spinal nerves |
| Actions | Bilaterally: Extend the head & neck, Unilaterally: Lateral flexion to the same side, Rotation to the same side. |