Upper cervical spinal nerves

Posterior and lateral views of the upper cervical spine, showing the leading articular sources of cervicogenic headache, the related nerves, and where needles are placed for diagnostic blocks of these structures. Red labels and needles point to target sites for diagnostic blocks.

AOJ: atlanto-occipital joint; C3 DMB: C3 deep medial branch block; C4mb: medial branch of the C4 dorsal ramus; dmb: deep medial branch of the C3 dorsal ramus; LAA IAB: intra-articular block of the lateral atlanto-axial joint; LAAJ: lateral atlanto-axial joint; ton: third occipital nerve; TONB: third occipital nerve block; ZJ: zygapophysial joint.

Reproduced from: Bogduk N, Govind J. Cervicogenic headache: an assessment of the evidence on clinical diagnosis, invasive tests, and treatment. Lancet Neurol 2009; 8:959. Illustration used with the permission of Elsevier Inc. All rights reserved.

Graphic 58357 Version 2.0

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Upper cervical spinal nerves