Posterior nerve root (DR)

The posterior nerve root, also known as the dorsal nerve root, is an anatomical structure comprising sensory nerve fibers that transmit afferent information from the peripheral nervous system to the spinal cord [1, 12]. It is not a singular molecule or receptor but a multicellular assembly of axons and glial cells that serves as the primary sensory gateway for the central nervous system [14, 15]. Clinically, the posterior nerve root is a significant therapeutic target for interventional pain management, where local anesthetics and corticosteroids are applied locally to block nociceptive signaling in conditions like radiculopathy and sciatica [5, 17]. Mechanical compression or inflammation of these roots is a primary driver of chronic neuropathic pain, which may be managed through surgical decompression or neuromodulation techniques [3, 17, 20]. Although the structure contains numerous molecular targets, including various voltage-gated ion channels and neurotransmitter receptors, the root itself is defined by its gross anatomical role in sensory conduction rather than as a molecular entity [12, 15]. Therapeutic challenges include the risk of direct nerve injury during invasive procedures and the high complexity of treating persistent pain resulting from chronic nerve root damage [17, 18].

Other names

Dorsal nerve rootSensory root of spinal nerveRadix posterior nervi spinalisSensory rootRadix sensoria

Blockade of axonal conduction via inhibition of voltage-gated sodium channels to stop sensory signaling; reduction of inflammation and nerve root edema through corticosteroid-mediated inhibition of phospholipase A2 and inflammatory cytokine expression