Key result
Spontaneously hypertensive rats exhibited a much greater centrally evoked increase in renal sympathetic nerve activity during motor activity (306 ± 110%) compared to normotensive WKY (187 ± 146%) and SD rats (165 ± 44%).
Why the study?
It remained unknown whether changes in sympathetic nerve activity and hemodynamics during spontaneously occurring motor activity are altered by hypertension.
Population
Decerebrate, paralyzed SHR, WKY, and normotensive SD rats
Comparison
SHR vs WKY vs SD rats during spontaneously occurring motor activity
Design
Comparative animal physiology study
Authors
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Augmented central command in hypertensive models may influence vasomotor control; leaves open translation to human hypertension.
Absolute Event Rate: 306% vs 187%
In a rat model, hypertension is associated with exaggerated sympathetic nerve and pressor responses during spontaneous motor activity, likely driven by central command pathways independent of the arterial baroreflex.
Matsukawa et al. (2023) studied Hypertension (animal model). Hypertension (SHR strain) vs. Normotensive strains (WKY and SD) was evaluated on Increase in renal sympathetic nerve activity (RSNA) and mean arterial pressure (MAP) during spontaneously occurring motor activity. Spontaneously hypertensive rats exhibited a much greater centrally evoked increase in renal sympathetic nerve activity during motor activity (306 ± 110%) compared to normotensive WKY (187 ± 146%) and SD rats (165 ± 44%).
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