The effect of chemoreceptor stimulation upon muscle sympathetic nerve activity

Gregory J. Gates; Matthew N. Bartels; John A. Downey; Ronald E. De Meersman

doi:10.1016/j.resp.2009.05.009

The effect of chemoreceptor stimulation upon muscle sympathetic nerve activity

Gregory J. Gates, Matthew N. Bartels, John A. Downey, Ronald E. De Meersman

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

The aim of this investigation was to quantify the combined peripheral and central chemoreceptor contribution to sympathetic outflow above (post) and below (pre) the chemoreceptor ventilatory threshold (CVT). We measured muscle sympathetic nerve activity (MSNA) in seven subjects during hypoxic/hypercapnic and room air rebreathe protocols. Comparisons were made using a repeated measures analysis of variance with two within subject factors. One factor contained three levels-hyperventilation, pre-CVT, and post-CVT. The other factor contained two levels-rebreathe and control. Total MSNA increased from hyperventilation to pre-CVT to post-CVT in the rebreathe trial (385.7 ± 95.9, 592.4 ± 155.7, 882.0 ± 235.4 au/15 s respectively) and remained constant in the control trial (433.0 ± 189.3, 409.1 ± 183.4, 406.1 ± 161.4 au/15 s respectively). Ventilation increased in the rebreathe trial only. Heart rate and blood pressure did not change in either trial. These data suggest that the chemoreceptors significantly contribute to the modulation of sympathetic outflow.

Original language	English (US)
Pages (from-to)	268-272
Number of pages	5
Journal	Respiratory Physiology and Neurobiology
Volume	167
Issue number	3
DOIs	https://doi.org/10.1016/j.resp.2009.05.009
State	Published - Jul 31 2009
Externally published	Yes

Keywords

Autonomic
Chemoreceptor
Sympathetic
Ventilation

ASJC Scopus subject areas

Neuroscience(all)
Physiology
Pulmonary and Respiratory Medicine

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10.1016/j.resp.2009.05.009

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abstract = "The aim of this investigation was to quantify the combined peripheral and central chemoreceptor contribution to sympathetic outflow above (post) and below (pre) the chemoreceptor ventilatory threshold (CVT). We measured muscle sympathetic nerve activity (MSNA) in seven subjects during hypoxic/hypercapnic and room air rebreathe protocols. Comparisons were made using a repeated measures analysis of variance with two within subject factors. One factor contained three levels-hyperventilation, pre-CVT, and post-CVT. The other factor contained two levels-rebreathe and control. Total MSNA increased from hyperventilation to pre-CVT to post-CVT in the rebreathe trial (385.7 ± 95.9, 592.4 ± 155.7, 882.0 ± 235.4 au/15 s respectively) and remained constant in the control trial (433.0 ± 189.3, 409.1 ± 183.4, 406.1 ± 161.4 au/15 s respectively). Ventilation increased in the rebreathe trial only. Heart rate and blood pressure did not change in either trial. These data suggest that the chemoreceptors significantly contribute to the modulation of sympathetic outflow.",

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AU - Bartels, Matthew N.

AU - Downey, John A.

AU - De Meersman, Ronald E.

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N2 - The aim of this investigation was to quantify the combined peripheral and central chemoreceptor contribution to sympathetic outflow above (post) and below (pre) the chemoreceptor ventilatory threshold (CVT). We measured muscle sympathetic nerve activity (MSNA) in seven subjects during hypoxic/hypercapnic and room air rebreathe protocols. Comparisons were made using a repeated measures analysis of variance with two within subject factors. One factor contained three levels-hyperventilation, pre-CVT, and post-CVT. The other factor contained two levels-rebreathe and control. Total MSNA increased from hyperventilation to pre-CVT to post-CVT in the rebreathe trial (385.7 ± 95.9, 592.4 ± 155.7, 882.0 ± 235.4 au/15 s respectively) and remained constant in the control trial (433.0 ± 189.3, 409.1 ± 183.4, 406.1 ± 161.4 au/15 s respectively). Ventilation increased in the rebreathe trial only. Heart rate and blood pressure did not change in either trial. These data suggest that the chemoreceptors significantly contribute to the modulation of sympathetic outflow.

AB - The aim of this investigation was to quantify the combined peripheral and central chemoreceptor contribution to sympathetic outflow above (post) and below (pre) the chemoreceptor ventilatory threshold (CVT). We measured muscle sympathetic nerve activity (MSNA) in seven subjects during hypoxic/hypercapnic and room air rebreathe protocols. Comparisons were made using a repeated measures analysis of variance with two within subject factors. One factor contained three levels-hyperventilation, pre-CVT, and post-CVT. The other factor contained two levels-rebreathe and control. Total MSNA increased from hyperventilation to pre-CVT to post-CVT in the rebreathe trial (385.7 ± 95.9, 592.4 ± 155.7, 882.0 ± 235.4 au/15 s respectively) and remained constant in the control trial (433.0 ± 189.3, 409.1 ± 183.4, 406.1 ± 161.4 au/15 s respectively). Ventilation increased in the rebreathe trial only. Heart rate and blood pressure did not change in either trial. These data suggest that the chemoreceptors significantly contribute to the modulation of sympathetic outflow.

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KW - Sympathetic

KW - Ventilation

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The effect of chemoreceptor stimulation upon muscle sympathetic nerve activity

Abstract

Keywords

ASJC Scopus subject areas

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