rectus capitis lateralis (muscle)

rec·tus ca·pi·tis la·te·ra·lis (mus·cle)

[TA]
suboccipital (prevertebral) muscle of upper neck; origin, transverse process of atlas; insertion, jugular process of occipital bone; action, inclines head to one side; nerve supply, ventral primary ramus of first cervical spinal nerve.