| Intertransversarii | |
|---|---|
 Intertransversarii muscles | |
| Details | |
| Origin | Transverse process |
| Insertion | Transverse process above |
| Nerve | Ventral rami anddorsal rami ofspinal nerves |
| Actions | Lateralflexion oftrunk |
| Identifiers | |
| Latin | musculi intertransversarii |
| TA98 | A04.3.02.401 |
| TA2 | 2294 |
| FMA | 22848 |
| Anatomical terms of muscle | |
Theintertransversarii are smallmuscles placed between thetransverse processes of thevertebrae.
In the cervical region they are best developed, consisting of rounded muscular and tendinousfasciculi, and are placed in pairs, passing between the anterior and the posteriortubercles respectively of the transverse processes of two contiguous vertebrae, and separated from one another by an anterior primary division of thecervical nerve, which lies in the groove between them.
Both sets are supplied by theanterior rami of thespinal nerves.
There are seven pairs of these muscles, the first pair being between theatlas andaxis, and the last pair between the seventh cervical and firstthoracic vertebræ.
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 firstlumbar. These are called the thoracic intertransversarii and are supplied by theposterior rami of thespinal nerves.
In the lumbar region they are arranged in pairs, on either side of the vertebral column,
The intertransversarii laterales are supplied by theanterior rami, and the intertransversarii mediales by theposterior rami of the spinal nerves.
They contribute little to no movement on their own, but they stabilize adjoining vertebrae allowing more effective action from other muscle groups.
This article incorporates text in thepublic domain frompage 401 of the 20th edition ofGray's Anatomy(1918)
