Modification of Reflex Regulation of Blood Pressure by Behavior
1984; Annual Reviews; Volume: 46; Issue: 1 Linguagem: Inglês
10.1146/annurev.ph.46.030184.001025
ISSN1545-1585
Autores Tópico(s)Cardiovascular and exercise physiology
ResumoThe arterial baroreceptor reflex has been the subject of hundreds of ex perimental studies over more than 50 years. However, there have been relative ly few studies concerning the role of the baroreflex in the regulation of blood pressure during changes in behavioral state. Nonbehavioral studies have re vealed the basic characteristics of the baroreflex and have identified certain limitations of the reflex as a regulator of blood pressure. For example, the baroreflex has limited importance in setting the long-term, average level of blood pressure (15, 33). The salient abnormality that accompanies chronic denervation of baroreceptors is increased lability of blood pressure (14, 28, 31), indicating that the baroreflex plays a critical role in stabilizing blood pressure against acute fluctuations. However, some behavioral studies have indicated that the role of the baroreflex in moment-to-moment regulation of blood pressure is more complex than that of a simple buffer system (4, 42). This review focuses on evidence relevant to the hypothesis that the central nervous system modifies the baroreflex as part of its adjustment of the cardiovascular system for particular behaviors.
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