Cervical plexus and greater occipital nerve blocks: controversies and technique update

The cervical plexus originates from the anterior rami of the C1–C4 cervical spinal nerves.[1 2][1] The anterior ramus of C1 (the suboccipital nerve) is a motor nerve not blocked as part of any described technique of cervical plexus blockade. Thus, a cervical plexus block is properly defined as a