Research article summary (published 30 May 2003):

The silent period from soleus and gastrocnemius muscles in relation to conditions of standing.

Full Abstract

To clarify the relationship between postural instability and silent period (SP), we studied the variation of SP from soleus (SOL) and gastrocnemius (GAS) muscles on various standings. Subjects were eight healthy males, with a mean age of 23.5 +/- 2.2 (21-27) years. Standings in this study was regulated with ten kinds of situations provided by visual information, supporting or not by a finger and a width of base of support. SP evoked by single stimulation to tibial nerve at the popliteal fossa was recorded from SOL and GAS of dominant side during ten kinds of standings in random. The raw data were averaged 30 times. SP was calculated the duration from the artifact due to electrical stimulation to re-starting the electromyographical bursting of tonic muscle contraction under 100 or 200 microV|div on a screen. As a result of this study, there were not any statistical significant changes in SP from both SOL and GAS (one-way ANOVA: F = 1.797, F = 1.786) among ten kinds of standing. It is thought that a variation of SP may reflect the magnitude of facilitation or disinhibition of the central nervous system including spinal, brainstem or motor cortex. As the result of this study in healthy persons, it was suggested that the degree of facilitation or disinhibition of central nervous system related to SP from SOL and GAS was not different on ten kinds of standings regulated by visual information and a width of base of support.

Author information

Author/s: Daikuya, S (S); Tanino, Y (Y); Nishimori, T (T); Takasaki, K (K); Suzuki, T (T);

Affiliation: Department of Physical Therapy, Kansai Vocational College of Medicine, Osaka, Japan. daikuya(-atsign-)kansai.ac.jp

Journal and publication information

Publication Type: Journal Article

Journal: Electromyography and clinical neurophysiology (Electromyogr Clin Neurophysiol), published in Belgium. (Language: eng)

Reference: 2003-Jun; vol 43 (issue 4) : pp 217-22

Dates: Created 2003/07/02; Completed 2003/08/13; Revised 2004/11/17;

PMID: 12836586, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adult Electric Stimulation Electromyography Evoked Potentials, Motor - physiology Humans Leg - physiology

Male Muscle Contraction - physiology Muscle, Skeletal - physiology Posture - physiology Reaction Time - physiology Reference Values

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