Proximal Attachment
Obliquus capitis inferior is the largest of the ‘suboccipital’ muscles; it arises from the lateral surface of the spinous process and adjacent lamina of C2.

Distal Attachment
It passes supero-laterally to attach to the infero-posterior aspect of the transverse process of C1.

Nerve Supply
It is supplied by the dorsal ramus of C1.

Action
Obliquus capitis inferior rotates the face to the same side and stabilizes the atlanto-axial joint during movement.