Strong potential for baroreflex-governed sympathetic outflow revealed during nausea.
Clin Auton Res
; 20(6): 371-4, 2010 Dec.
Article
en En
| MEDLINE
| ID: mdl-20680386
ABSTRACT
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.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Sistema Nervioso Simpático
/
Barorreflejo
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Náusea
Límite:
Female
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Humans
/
Middle aged
Idioma:
En
Revista:
Clin Auton Res
Asunto de la revista:
NEUROLOGIA
Año:
2010
Tipo del documento:
Article
País de afiliación:
Suecia