Feedforward contraction of transversus abdominis is not influenced by the direction of arm movement

Hodges, P. W. and Richardson, C. A. (1997) Feedforward contraction of transversus abdominis is not influenced by the direction of arm movement. Experimental Brain Research, 114 2: 362-370. doi:10.1007/PL00005644

Author Hodges, P. W.
Richardson, C. A.
Title Feedforward contraction of transversus abdominis is not influenced by the direction of arm movement
Journal name Experimental Brain Research   Check publisher's open access policy
ISSN 0014-4819
Publication date 1997-04-01
Year available 1997
Sub-type Article (original research)
DOI 10.1007/PL00005644
Open Access Status Not yet assessed
Volume 114
Issue 2
Start page 362
End page 370
Total pages 9
Place of publication Berlin
Publisher Springer
Language eng
Subject 11 Medical and Health Sciences
Abstract Because the structure of the spine is inherently unstable, muscle activation is essential for the maintenance of trunk posture and intervertebral control when the limbs are moved. To investigate how the central nervous system deals with this situation the temporal components of the response of the muscles of the trunk were evaluated during rapid limb movement performed in response to a visual stimulus. Fine-wire electromyography (EMG) electrodes were inserted into transversus abdominis (TrA), obliquus internus abdominis (OI) and obliquus externus abdominis (OE) of 15 subjects under the guidance of real-time ultrasound imaging. Surface electrodes were placed over rectus abdominis (RA), lumbar multifidus (MF) and the three parts of deltoid. In a standing position, ten repetitions of shoulder flexion, abduction and extension were performed by the subjects as fast as possible in response to a visual stimulus. The onset of TrA EMG occurred in advance of deltoid irrespective of the movement direction. The time to onset of EMC activity of OI, OE, RA and MF varied with the movement direction, being activated earliest when the prime action of the muscle opposed the reactive forces associated with the specific limb movement. It is postulated that the non-direction-specific contraction of TrA may be related to the control of trunk. stability independent of the requirement for direction-specific control of the centre of gravity in relation to the base of support.
Keyword Neurosciences
Anticipatory Postural Adjustments
Abdominal Muscles
Trunk Control
Trunk Muscle-activity
Postural Adjustments
Intraabdominal Pressure
Voluntary Movement
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Health and Rehabilitation Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 313 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 370 times in Scopus Article | Citations
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Created: Tue, 14 Aug 2007, 02:48:37 EST