What is the action of the interspinales?
Table of Contents
What is the action of the 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 are segmental muscles?
The levatores costarum, interspinales and intertransversarii muscles form the deepest layer of the deep back muscles and are sometimes referred to as the segmental muscles or the minor deep back muscles.
How many intertransversarii muscles are there?
There are seven pairs of intertransversarii in the cervical area. The first pair is situated at the atlas and axis and the last pair is near the first thoracic vertebrae. The thoracic subdivision has unpaired intertransversarii muscles between the transverse processes of the three inferior vertebrae.
What are extrinsic muscles?
Definition. A group of muscles lying superficially on a structure, in contrast to intrinsic muscles, which are located deeply. Supplement. For instance, the extrinsic muscles of the tongue include genioglossus muscle, hyoglossus muscle, styloglossus muscle, and palatoglossus muscle.
How many Interspinales are there?
In the lumbar region there are four pairs of lumbar interspinales in the intervals between the five lumbar vertebrae….
| Interspinales muscles | |
|---|---|
| Details | |
| Insertion | Spinous process |
| Nerve | Posterior rami of spinal nerves |
| Actions | Proprioception of vertebral column. |
What do the rotatores muscles do?
The rotatores muscle, along with the multifidus and semispinalis muscles, facilitates the unilateral rotation (turning from side to side) and bilateral extension (bending backward and forward) of the spine.
What are the transversospinalis muscles?
Transversospinales muscle group is a deep group of back muscles that lies deep to the Erector Spinae. It consists of 3 major subgroups: semispinalis, multifidus and rotatores.
What is the origin of intertransversarii?
Anterior intertransversarii colli originate from the anterior tubercles of transverse process of one cervical vertebra and insert onto the anterior tubercle of transverse process of the adjacent vertebra.
What are the Interspinales?
The interspinales muscles are small muscles that connect the spinous processes of adjacent spinal vertebrae. They are comprised of paired muscle fascicles, one on each side of the interspinous ligament.
What is origin and insertion for intertransversarii?
What nerve Innervates the Interspinales?
| Interspinales muscles | |
|---|---|
| Details | |
| Nerve | Posterior rami of spinal nerves |
| Actions | Proprioception of vertebral column. |
| Identifiers |
What is the intertransversarii?
The intertransversarii are small muscles that run between the transverse processes of the vertebrae.
What is the action of rotatores?
The rotatores muscles function to move the spine and back in several different directions, including a forward bend.
Where is the rotatores muscles?
thoracic region
The rotatores muscles (rotatores spinae muscles) lie beneath the multifidus and are present in all spinal regions but are most prominent in the thoracic region; they are eleven in number on either side.
