Strong potential for baroreflex-governed sympathetic outflow revealed during nausea
2010 (English)In: Clinical Autonomic Research, ISSN 0959-9851, E-ISSN 1619-1560, Vol. 20, no 6, 371-374 p.Article in journal (Refereed) Published
Muscle sympathetic nerve activity (MSNA) was recorded in two patients with amyotrophic lateral sclerosis. As expected, they exhibited a high level of MSNA at rest, with an inverse weak response to different maneuvers normally eliciting strong increase in MSNA. About 30 min after the intake of a glucose solution, they developed nausea with an extreme rise in MSNA and blood pressure. In one patient, a quantified analysis of this reaction could be done: the outflow was close to 200% above the already high resting level and >100% stronger than the response to any of the performed maneuvers. We regard this observation of importance, because it seems to unveil resources utilized only rarely, and strongly overcoming the "ceiling effect" that seemingly is a hindrance for sympathetic activation in subjects with high lever of MSNA at rest. An inhibitory "safety limit" might exist, the trespassing of which would damage the organism and thus occurs only during extraordinary circumstances.
Place, publisher, year, edition, pages
2010. Vol. 20, no 6, 371-374 p.
Baroreflex, Blood pressure regulation, Hypertension, Sympathetic nervous system
Medical and Health Sciences
Research subject Neurology
IdentifiersURN: urn:nbn:se:uu:diva-130617DOI: 10.1007/s10286-010-0076-4ISI: 000285081200004PubMedID: 20680386OAI: oai:DiVA.org:uu-130617DiVA: diva2:350032