Intertransversarii muscle

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Intertransversarii muscle
Intertransversarii muscles.jpg
Intertransversarii muscles
Latin Musculi intertransversarii
Gray's p.401
Origin Transverse process
Insertion Transverse process above
Nerve Posterior rami of spinal nerves
Actions Lateral flexion of trunk
Anatomical terms of muscle

The Intertransversarii are small muscles placed between the transverse processes of the vertebræ.

Divisions[edit]

Cervical[edit]

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 vertebræ, 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[edit]

In the thoracic region they are present between the transverse processes of the lower three thoracic vertebræ, and between the transverse processes of the last thoracic and the first lumbar.

Lumbar[edit]

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.

Innervation[edit]

The intertransversarii muscle is primarily innervated by anterior rami of spinal nerves, but partly also from posterior rami.[1]

See also[edit]

References[edit]

  1. ^ videohelp.com

External links[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.