Interspinalis thoracis
Thoracic interspinales · Back
Deep muscle — it lies under other muscles. X-ray makes the muscles over it see-through.
- Origin
- Spinous process of a thoracic vertebra
- Insertion
- Spinous process of the neighbouring vertebra
- Action
- Extends the spine
- Nerve supply
- Dorsal rami of the spinal nerves
Short muscles between neighbouring spinous processes. In the thoracic spine they are small and found only at its upper and lower ends; they are much better developed in the neck and lower back.
Interspinalis thoracis anatomy page →