Sonographically Guided Cervical Facet Nerve and Joint Injections

Identifying the correct cervical level using the C6–C7 approach. Identifying the correct cervical level using the occiput C1–C2 approach. Identifying the C2–3 joint using the mastoid C1–C2 approach. Cervical facet intra-articular injection: out-of-plane approach. Third occipital nerve injection: out-of-plane approach. Cervical facet medial branch block: in-plane approach. Cervical facet medial branch block: out-of-plane approach. Critical artery traversing the articular pillar on its way to the neuroforamen. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.