Key result
This review explores the hypothesis that afferent signals from the exercise pressor reflex communicate via GABAergic contacts in the brain stem to increase cardiac output and blood pressure.
Why the study?
The exercise pressor reflex is a principal mediator of cardiovascular responses to exercise, and this review explores how afferent signals communicate via brainstem GABAergic contacts to evoke parasympathetic withdrawal and sympathoexcitation.
Understanding the neural pathways of the exercise pressor reflex, specifically GABAergic signaling in the brain stem, provides insight into cardiovascular control during exercise.
Answers are grounded in this paper and cite their sources.
Hypothesis-generating for GABAergic brainstem control of exercise hemodynamics; clinical relevance remains undetermined.
The exercise pressor reflex (EPR) is engaged upon the activation of group III/IV skeletal muscle afferents and is one of the principal mediators of cardiovascular responses to exercise. This review explores the hypothesis that afferent signals from EPR communicate via GABAergic contacts within the brain stem to evoke parasympathetic withdrawal and sympathoexcitation to increase cardiac output, peripheral resistance, and blood pressure during exercise.
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Teixeira et al. (2020) conducted a review in Cardiovascular control during exercise. Exercise pressor reflex (EPR) activation was evaluated on Cardiovascular responses (parasympathetic withdrawal, sympathoexcitation, increased cardiac output, peripheral resistance, and blood pressure). This review explores the hypothesis that afferent signals from the exercise pressor reflex communicate via GABAergic contacts in the brain stem to increase cardiac output and blood pressure.
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