Key result
Partial spectral analysis revealed that the baroreceptor-sympathetic relationship contains both linear (phase-locking) and nonlinear (phase walk) components in urethan-anesthetized cats.
Population
Urethan-anesthetized cats
Design
Preclinical
Authors
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Preclinical cat data warrant no clinical practice change; leaves open whether nonlinear baroreflex dynamics apply in conscious humans.
This preclinical study demonstrates that the baroreceptor-sympathetic relationship contains both linear and nonlinear components, and central circuits generating sympathetic nerve activities are likely physically interconnected.
Larsen et al. (2000) studied this question. Baroreceptor denervation and partial spectral analysis was evaluated on Relationship between pulse synchronous baroreceptor input and cardiac-related rhythm in sympathetic nerve discharge. Partial spectral analysis revealed that the baroreceptor-sympathetic relationship contains both linear (phase-locking) and nonlinear (phase walk) components in urethan-anesthetized cats.
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