Key result
Baroreflex and chemoreflex stressors elevate cerebral sympathetic activity without altering internal carotid blood flow.
Why the study?
Do baroreflex and respiratory chemoreflex stressors elevate cerebral sympathetic nervous activity and impact blood flow regulation in the internal carotid artery in humans?
Do baroreflex and respiratory chemoreflex stressors elevate cerebral sympathetic nervous activity and impact blood flow regulation in the internal carotid artery in humans?
Baroreflex and respiratory chemoreflex stressors increase cerebral sympathetic activity without affecting internal carotid artery blood flow.
Indicates cerebral sympathetic activation without altering ICA flow; hypothesis-generating for baroreflex/chemoreflex effects on cerebral regulation.
The results of the current study suggest that baroreflex and respiratory chemoreflex stressors elevate cerebral sympathetic nervous activity, quantified using the brain norepinephrine spillover method. However, the observed cerebral sympathetic activation has no impact on blood flow regulation in the internal carotid artery.
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Tymko et al. (2024) studied this question. Baroreflex and respiratory chemoreflex stressors elevate cerebral sympathetic nervous activity but have no impact on blood flow regulation in the internal carotid artery.
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