- C1:
- Motor only nerve
- Rectus capitis muscles, omohyoid, thyrohyoid and geniohyoid.
- Suboccipital nerve Aka posterior ramus of the first cervical spinal nerve (C1)
- C2:
- Motor and sensory nerve
- Rectus capitis muscles, omohyoid, sternohyoid, sternothyroid and longus colli.