Rotatores

Musculi rotatores

Core CoreBackSpinal Erectors

The rotatores are the deepest layer of the transversospinal muscles, small quadrilateral fascicles most developed in the thoracic region that span one to two vertebral segments. With a high density of proprioceptors, they function more as fine spinal-position sensors and segmental stabilizers than as powerful rotators. They contribute to the deep stiffness and positional control that protect the spine during loaded twisting and bracing.

Actions

Contralateral rotation of the vertebral column, Segmental spinal stabilization, Proprioception

Origin

Transverse process of a vertebra (superior and posterior part)

Insertion

Lamina and base of the spinous process of the vertebra one (breves) or two (longi) segments above

Innervation

Posterior (dorsal) rami of the spinal nerves

Blood supply

Posterior intercostal and lumbar arteries

Heads

Rotatores breves, Rotatores longi

Wikipedia ↗

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