Intertransversarii

Intertransversarii

Intertransversarii muscles
Details
Origin Transverse process
Insertion Transverse process above
Nerve Ventral rami and Dorsal rami of spinal nerves
Actions Lateral flexion of trunk
Identifiers
Latin Musculi intertransversarii
Dorlands
/Elsevier
m_22/12549464
TA A04.3.02.401
FMA 22848

Anatomical terms of muscle

The intertransversarii are small muscles placed between the transverse processes of the vertebrae.

Structure

Cervical

In the cervical region they are best developed, consisting of rounded muscular and tendinous fasciculi, and are placed in pairs, passing between the anterior and the posterior tubercles respectively of the transverse processes of two contiguous vertebrae, and separated from one another by an anterior primary division of the cervical nerve, which lies in the groove between them.

Both sets are supplied by the anterior divisions of the spinal nerves.

There are seven pairs of these muscles, the first pair being between the atlas and axis, and the last pair between the seventh cervical and first thoracic vertebræ.

Thoracic

In the thoracic region they are present between the transverse processes of the lower three thoracic vertebrae, and between the transverse processes of the last thoracic and the first lumbar. These are called the thoracic intertransversarii and are supplied by the posterior division of the spinal nerve.

Lumbar

In the lumbar region they are arranged in pairs, on either side of the vertebral column,

The intertransversarii laterales are supplied by the anterior divisions, and the intertransversarii mediales by the posterior divisions of the spinal nerves.

Function

They contribute little to movement on their own, but they stabilize adjoining vertebrae allowing more effective action from other muscle groups.

See also

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

    External links

    This article is issued from Wikipedia - version of the Tuesday, January 05, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.