Homeostatic Competition: Evidence of a Serotonin-Gated Spinoparabrachial Pathway for Respiratory and Thermoregulatory Interaction

  • Chi-Sang Poon
Conference paper
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 669)


Control of breathing and thermoregulation are vital physiological functions for the maintenance of arterial blood gas and pH homeostasis and body temperature homeostasis, respectively. It is widely believed that these homeostatic regulation functions act independently of one another via certain set point or feedfoward/feedback control mechanisms that are specific to each system. Here, the notion of “homeostatic competition” is introduced to depict the interaction of the respiratory and thermal controllers in negotiating a minimum-work ventilatory pattern that is optimal for survival in the face of conflicting homeostatic objectives during thermal stress. It is proposed that such competitive respiratory-thermoregulatory interaction may be mediated by the lateral parabrachial nucleus in dorsolateral pons, a critical site which receives cutaneous thermoafferent information via a serotonin-gated spinoparabrachial pathway and has been shown to modulate both chemoreflex and thermoreflex responses.


Spinal Dorsal Horn Feedforward Control Homeostatic Regulation Ventilatory Pattern Respiratory Heat Loss 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was supported by National Institutes of Health grants HL67966 and HL072849.


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Harvard-MIT Division of Health Sciences and TechnologyM.I.T.CambridgeUSA

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