Medial branch of dorsal ramus of third lumbar nerve

The medial branch of the dorsal ramus of the third lumbar nerve (L3) is a small peripheral branch of the mixed spinal nerve arising from the posterior (dorsal) ramus at the L3 vertebral level[3][1][5]. Its primary anatomical role is to supply the lumbar zygapophyseal (facet) joints, multifidus muscle, and interspinous ligament[3][5][7]. It courses medially over the transverse and superior articular processes, runs through a fibro-osseous canal deep to the multifidus muscle, and gives off articular and muscular branches[3][5]. Clinically, this nerve is a common target for diagnostic nerve blocks and radiofrequency ablation in the management of facet-mediated lumbar back pain, but it is not itself a molecular therapeutic target as it is an anatomical peripheral nerve rather than a protein or receptor[5]. Additional context: - This target is anatomical—not molecular. It is not a receptor, enzyme, transporter, or similar molecule; thus it does not fit standard drug-target ontologies. - Its clinical importance is procedural (nerve block, ablation) rather than pharmacologic or molecular. Summary of reasons for is_incorrect: - This is *not* a molecular target (e.g., receptor, enzyme), but a peripheral nerve branch, so does not meet the criteria as a canonical drug target for small molecules or biologics[5][3]. - There are no standardized molecular classifications, common biomarkers, or protein aliases. - Standard conventions in drug discovery/target databases do not include anatomical nerve branches as canonical targets.

Other names

Medial branch of posterior ramus of L3Medial branch of dorsal ramus at L3Medial branch of L3 dorsal ramus

Nerve blockade (by local anesthetics, interrupting nociceptive and proprioceptive signaling); Nerve denervation (by radiofrequency ablation, disrupting pain transmission)