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Rotatores cervicis muscle

The rotatores cervicis muscles are a group of small, deep, intrinsic muscles of the cervical spine that play a crucial role in the stabilization and subtle movements of the vertebral column. These muscles form part of the transversospinales group and are typically best visualized in cross-sectional anatomy and high-resolution imaging. Their function is mostly proprioceptive, helping coordinate fine adjustments of cervical vertebrae and providing important feedback to maintain posture and control of head movement.

Origin

  • Arise from the superior and posterior aspect of the transverse process of one cervical vertebra.

Insertion

  • Insert into the lamina and base of the spinous process of the vertebra immediately above (short rotatores) or two vertebrae above (long rotatores), though in the cervical region, short rotatores predominate.

Function

  • Facilitate rotation and extension of the cervical spine.

  • Stabilize adjacent vertebrae.

  • Act as proprioceptive sensors, providing the central nervous system with feedback on cervical position.

Nerve Supply

  • Supplied by the dorsal rami of the cervical spinal nerves.

Artery Supply

  • Primarily supplied by branches of the deep cervical artery (branch of the costocervical trunk).

  • Additional minor supply from muscular branches of the vertebral artery.

Vein Supply

  • Venous drainage mainly through the accompanying veins of the deep cervical artery, draining into the vertebral venous plexus.

MRI Appearance

  • T1-weighted: Rotatores cervicis appear as small, intermediate-to-low signal intensity structures located posterolateral to the cervical vertebrae, surrounded by higher signal fat planes.

  • T2-weighted: Show intermediate signal; muscle tissue has slightly higher signal intensity compared to T1, but remains distinct from surrounding CSF or edema.

  • STIR (Short Tau Inversion Recovery): Muscle normally appears with low signal. Pathological conditions (such as edema or muscle injury) will show hyperintensity (bright signal) in the affected rotatores.

CT Appearance

  • Rotatores cervicis are not distinctly seen unless there is significant muscle atrophy or fatty infiltration.

  • Appear as soft-tissue densities posterior and lateral to the cervical laminae, surrounded by fat planes.

  • Better visualized on high-resolution multiplanar reconstructions.

MRI images

Rotatores cervicis muscle mri axial image