The obliquus capitis inferior is a suboccipital muscle of the neck. It is the only muscle within the suboccipital group which has no attachment to the cranium.
- Attachments: Originates from the spinous process of the C2 vertebra and attaches onto the transverse process of C1.
- Actions: Extension and rotation of the head.
- Innervation: Suboccipital nerve (posterior ramus of C1)
- Blood supply: Vertebral artery and deep descending branches of the occipital artery