Ventilatory pattern feedback loop

The "ventilatory pattern feedback loop" describes the set of neural circuits and sensory feedback mechanisms that regulate breathing rate and tidal volume in mammals. It integrates chemical signals (CO₂, O₂, pH) from chemoreceptors and mechanical signals from lung mechanoreceptors, relayed via the brainstem respiratory pattern generator to motor neurons that control respiratory muscles. The feedback loop ensures homeostatic control of gas exchange, maintains arterial CO₂ and O₂ within physiological limits, and adapts respiratory patterns to changes in metabolic demand. It is not a defined molecular or receptor target, but rather a physiological control system involving neural circuits and feedback mechanisms that regulate breathing patterns. Abnormalities in this system can cause or contribute to sleep apnea, central hypoventilation, and other respiratory disorders. If seeking a drug target related to ventilatory control, it is more appropriate to refer to specific molecular or receptor targets involved in the loop (e.g., central chemoreceptors, the pre-Bötzinger complex, opioid receptors in the respiratory centers) rather than the overall feedback loop as an entity.

Other names

Respiratory feedback loopVentilatory control feedbackBreathing pattern control loop