Sympathetic response following unannounced loss of balance during walking in young adults - laboratory study.
J Neurophysiol
; 2024 Aug 07.
Article
em En
| MEDLINE
| ID: mdl-39108211
ABSTRACT
BACKGROUND:
An unannounced balance loss during walking, i.e., balance perturbation, is a stressful event that changes the activity of the Sympathetic Nervous System (SNS). We examined SNS response to unannounced balance perturbation during walking, simulating real-life conditions of balance loss. RESEARCH QUESTION Do laboratory-induced unannounced balance losses during walking cause a sympathetic response, and if so - does it habituate after a series of perturbations?METHODS:
34 young adults underwent a series of six successive unannounced balance perturbations while walking on a treadmill. Sympathetic activity was monitored continuously using Electrodermal Activity and compared before and immediately after each unannounced perturbation.RESULTS:
All perturbations elicited a significant increase in Electrodermal Activity (p<0.001), indicating a phasic increase in the sympathetic drive. The relative phasic increase of Electrodermal Activity caused by the first perturbation was significantly higher than the last perturbation (p<0.05). Three types of Electrodermal Activity behavior were observed Steady level tonic SNS activity, increased SNS activity, and decreased SNS activity.SIGNIFICANCE:
Balance loss during walking triggers phasic SNS response, this response habituates after a series of unannounced balance perturbations. In addition, three distinct patterns of tonic sympathetic activity may imply variations in the ability of the SNS response to habituate across individuals.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article