rotator muscle

Introduction

Deepest of the 3 layers of transverse spinal muscles chiefly developed in the thoracic region.

Origin

transverse processes of vertebrae

Insertion

• root of the spinous process of the next 2-3 vertebrae above

Action

probably serve as organs for proprioception

Innervation

dorsal rami of spinal nerves

More specific terms

• rotatores cervicis
• rotatores lumborum
• rotatores thoracis