Cough reflex pathway in medulla oblongata

The cough reflex pathway in the medulla oblongata refers to a network of neurons and associated nuclei within the medulla (notably the nucleus tractus solitarius, or nTS, and surrounding reticular formation) that process sensory input from airway afferents and generate the motor output constituting a cough. Sensory inputs are relayed by the vagus nerve to the medulla, where integration occurs before sending efferent signals via the vagus, phrenic, and spinal motor nerves to the muscles controlling cough. This pathway coordinates a complex, protective reflex essential for airway clearance, and is regulated by neurotransmitters including glutamate and neurokinins. While its function can be the target of centrally acting antitussive drugs, the pathway itself is not a single druggable protein or receptor, but rather a distributed neural circuit[1][4][6][7].

Other names

Cough center in medullaMedullary cough centerBrainstem cough circuit

Central inhibition of neurotransmission (e.g., opioid receptor agonism); Modulation of excitatory amino acid neurotransmission (e.g., NMDA/glutamate receptor antagonism); Inhibition of neuropeptide signaling (e.g., neurokinin-1)