Cardiovascular Control During Exercise: The Connectivity of Skeletal Muscle Afferents to the Brain.
Level 5 - mechanism / opinion, no new human data
Narrative review detailing physiological and mechanistic hypotheses without empirical human trial data.
PubMed 32000180 · doi:10.1249/JES.0000000000000218
What was done
This review examined the neural pathways of the exercise pressor reflex (EPR), specifically exploring how group III/IV skeletal muscle afferent signals communicate within the central nervous system to regulate cardiovascular responses during exercise.
What was found
The abstract reports no empirical data or quantitative findings. It presents the hypothesis that EPR afferent inputs project via GABAergic connections in the brain stem to induce parasympathetic withdrawal and sympathetic activation, thereby driving elevations in cardiac output, peripheral resistance, and blood pressure.
Why it matters
It outlines a central circuit model (brainstem GABAergic interactions) linking peripheral muscle sensory feedback to autonomic cardiovascular control during physical exertion.
Limits
As a narrative review, it lacks a systematic search methodology or meta-analytic data. No empirical study details, sample sizes, or quantitative outcome measures are provided in the abstract.
Cited by
- supports The exercise pressor reflex stimulates sympathetic vasoconstrictor activity via signals transmitted from skeletal muscle to the brain through group III and group IV unmyelinated or lightly myelinated afferent nerve fibers.