Anatomy
One of the intrinsic muscles of the back.
Consists of rotatores cervicus, thoracis and lumborum.
Rotatores cervicis:
Origin: Articular processes of cervical vertebrae.
Insertion: Spinous processes of cervical vertebrae.
Rotatores thoracis:
Origin: Transverse processes of thoracic vertebrae.
Insertion:Spinous processes of thoracic vertebrae.
Rotatores lumborum:
Origin: Mammillary processes of lumbar vertebrae.
Insertion: Spinous processes of lumbar vertebrae.
Key Relations:
Deepest muscle group of transversospinalis muscle. Best developed in the thoracic region.
Functions
Acting unilaterally rotate vertebrae ipsilaterally, acting bilaterally stabilize the vertebral column.
Supply
Nerve Supply:
Dorsal rami of associated spinal nerves.
Clinical
These small muscles are implicated in proprioceptive feedback regarding the position of the vertebrae and vertebral column and in general postural control.
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