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Updated: Jul 4, 2026
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Studying the Coding Profiles of Somatic Stimulation on Cardiac-locked Neuronal Responses in the Rat Spinal Dorsal Horn
Published on: May 23, 2025
Identification of neurocircuitry controlling cardiovascular function in humans using functional neurosurgery:
Alexander L Green1, David J Paterson
1Nuffield Department of Surgery, University of Oxford, John Radcliffe Hospital, Headley Way, Oxford OX3 9DU, UK. alex.green@physiol.ox.ac.uk
Experimental Physiology
|June 24, 2008
Summary
The periaqueductal grey area (PAG) may integrate central command signals for cardiovascular control during exercise. Electrical recordings in patients suggest the PAG plays a key role before and during physical activity.
Area of Science:
- Neuroscience
- Cardiovascular Physiology
Background:
- Human cardiovascular control during exercise is not fully understood.
- Previous research identified potential circuits involved in exercise response, termed 'central command', using functional imaging and animal studies.
Purpose of the Study:
- To review neurocircuits significant for cardiovascular control during exercise.
- To highlight the role of the periaqueductal grey area (PAG) based on direct electrical recordings in humans.
Main Methods:
- Review of studies involving direct electrical recordings of brain activity in patients with deep brain stimulating electrodes during exercise.
- Analysis of electrical activity in the periaqueductal grey area (PAG).
Main Results:
- The periaqueductal grey area (PAG) shows activity changes during anticipation of exercise.
- These changes suggest the PAG's involvement in the central command of cardiovascular variables before and during exercise.
- Electrical stimulation experiments in humans further elucidate the PAG's role.
Conclusions:
- The periaqueductal grey area (PAG) may function as an integrating area for cardiovascular control during exercise.
- It potentially integrates feedback from muscles and feedforward signals from higher brain centers.
- The PAG is crucial for human cardiovascular responses to exercise.
