How fast are feedforward postural adjustments of the abdominal muscles?

Tsao, H., Galea, M.P. and Hodges, Paul (2009) How fast are feedforward postural adjustments of the abdominal muscles?. Behavioral Neuroscience, 123 3: 687-693. doi:10.1037/a0015593

Author Tsao, H.
Galea, M.P.
Hodges, Paul
Title How fast are feedforward postural adjustments of the abdominal muscles?
Journal name Behavioral Neuroscience   Check publisher's open access policy
ISSN 0735-7044
Publication date 2009-06-01
Year available 2009
Sub-type Article (original research)
DOI 10.1037/a0015593
Open Access Status Not Open Access
Volume 123
Issue 3
Start page 687
End page 693
Total pages 7
Editor Ann E Kelley
Place of publication United States
Publisher American Psychological Association
Language eng
Subject C1
Abstract Abdominal muscles can be activated during rapid but complex motor responses known as feedforward postural adjustments. Exactly how the latency of feedforward adjustments compares with other responses of varying levels of voluntary input and motoneurone excitability remains unclear. Surface electrodes were placed bilaterally over abdominal muscles and over right anterior deltoid (AD) and orbicularis oculi (OO) muscles in eight healthy volunteers. Latencies were obtained during feedforward postural adjustment, acoustic startle reflex, and voluntary activation (respiratory and nonrespiratory) to soft and startling acoustic stimuli. Results showed voluntary activation was fastest for respiratory tasks during mid- or end-expiration. Voluntary activation was also faster when triggered by startling stimuli compared with soft stimuli. These responses were slower than feedforward postural adjustments in all subjects. Feedforward adjustments were slower than acoustic startle reflexes but were somewhat flexible as their amplitude depended on amplitude of AD activation and therefore matched parameters of the movement task. The latency for feedforward postural adjustments of abdominal muscles suggests organization at a low level of the nervous system with limited central processing to match postural responses to movement demands. Copyright (c) 2009 APA, all rights reserved. PMID: 19485575 [PubMed - indexed for MEDLINE]
Keyword acoustic startle reflex
postural control
simple reaction time
voluntary activation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Health and Rehabilitation Sciences Publications
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Created: Tue, 13 Oct 2009, 23:26:15 EST by Carmen Buttery on behalf of School of Health & Rehabilitation Sciences