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Baroreceptor and Chemoreceptor Afferent Processing in the Solitary Tract Nucleus
Book chapter

Baroreceptor and Chemoreceptor Afferent Processing in the Solitary Tract Nucleus

Robert B Felder and Steven W Mifflin
Nucleus of the Solitary Tract, pp.169-186
CRC Press, 1
1994
DOI: 10.1201/9780429277214-15

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Abstract

The caudal one-third of the solitary tract nucleus (NTS) occupies a unique position in the brainstem as the first central nucleus to receive sensory information from mechanosensitive and chemosensitive receptors innervating the heart and vascular tree. 1 From a neurophysiologist’s perspective, the convergence of primary afferent information from a variety of cardiovascular sensory receptors onto this small population of neurons provides a unique opportunity to explore the mechanisms by which neurons in the central nervous system process afferent information from the cardiovascular system. The sensory input to neurons in NTS can, in theory, be controlled and quantified, and cellular responses to “natural” inputs can be examined in a relatively simple system. In cardiovascular-related nuclei beyond NTS, the interpretation of integrative processes must always be tempered by the history of unknown prior afferent interactions in NTS and elsewhere, and a greater reliance on less specific forms of stimulation (e.g., electrical or chemical stimulation of other brainstem nuclei) often becomes necessary.
 Solitary Tract Nucleus Action Potential Response ST Baroreceptor Stimulation Aortic Nerve Baroreceptor Afferent EAA Receptor Afferent Nerves Afferent Information Vagus Nerve Stimulation Afferent Inputs CSN Stimulation Visceral Afferent Shr Rat Action Potential Discharge Electrical Stimulation PIR Afferent Fibers EAA Antagonist Carotid Sinus CSN Spike Frequency Adaptation

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