Pain signal transmission

Pain signal transmission refers to the process by which noxious stimuli are converted from physical or chemical events into electrical signals in nociceptors, relayed via the dorsal root ganglia and dorsal horn of the spinal cord, ascending through tracts such as the spinothalamic tract to the thalamus and somatosensory cortex, where pain is ultimately perceived[1][3][6][7]. The process involves a plethora of molecular entities—nociceptors, ion channels (sodium, potassium, calcium), neurotransmitters (glutamate, substance P, CGRP), and associated receptors (NMDA, AMPA, G protein-coupled receptors)[2][4][8][9]. Therapeutic intervention targets these molecules and processes, rather than the “pain signal transmission” mechanism as a whole. Summary: “Pain signal transmission” is descriptive of a process, not a molecule or receptor, and should not be considered a therapeutic target entry as conventionally structured for molecular pharmacology. Instead, specific components—e.g., “Sodium channel protein type 9 subunit alpha (Nav1.7)”, “μ-opioid receptor”, “NMDA receptor”—are the actual therapeutic targets involved in the transmission of pain.

Other names

Pain pathwayNociceptive pathwayPain transmission mechanismAscending pain pathwaySpinothalamic tract

Blockade of sodium/calcium channels to reduce neuronal excitation Opioid receptor activation to suppress neurotransmitter release and inhibit transmission in pain pathways NMDA/glutamate receptor antagonism to reduce excitatory transmission Modulation of GABAergic and glycinergic interneurons for inhibitory control