Neural autonomic control in orthostatic intolerance

Raffaello Furlan, Franca Barbic, Francesco Casella, Giorgio Severgnini, Luca Zenoni, Angelo Mercieri, Ruggero Mangili, Giorgio Costantino, Alberto Porta

Research output: Contribution to journalArticle

Abstract

Inability to maintain the upright position is manifested by a number of symptoms shared by either human pathophysiology and conditions following weightlessness or bed rest. Alterations of the neural sympathetic cardiovascular control have been suggested to be one of the potential underlying etiopathogenetic mechanisms in these conditions. We hypothesize that the study of the autonomic profile of human orthostatic intolerance syndromes may furnish a valuable insight into the complexity of the sympathetic alterations leading to a reduced gravitational tolerance. In the present paper we describe abnormalities both in the magnitude and in the pattern of the sympathetic neural firing observed in patients affected by orthostatic intolerance, attending the upright position. Also, we discuss similarity and differences in the neural sympathetic mechanisms regulating the cardiovascular system during the gravitational stimulus both in clinical syndromes and in subjects returning from space.

Original languageEnglish
JournalRespiratory Physiology and Neurobiology
Volume169
Issue numberSUPPL.
DOIs
Publication statusPublished - Oct 2009

Keywords

  • Baroreceptors
  • Orthostatic intolerance
  • Syncope

ASJC Scopus subject areas

  • Physiology
  • Pulmonary and Respiratory Medicine
  • Neuroscience(all)
  • Medicine(all)

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