yogabook / muscles / autochthonous back muscles / spinalis

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M. spinalis

Part of the interspinous system (between spinous processes)
Origin:
Attachment:
Innervation: medial branches of the rami posteriores of the according spinal nerves
Antagonists:
Movement: Innervated on both sides: Extension of the spine; innervated unilaterally: Support of an already assumed ipsilateral lateral flexion or elimination of a contralateral lateral flexion.