Effect of different approaches to target force on transcranial magnetic stimulation responses

Gruet, Mathieu, Temesi, John, Rupp, Thomas, Millet, Guillaume and Verges, Samuel (2013) Effect of different approaches to target force on transcranial magnetic stimulation responses. Muscle & Nerve, 48 (3). pp. 430-432. ISSN 0148-639X

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Abstract

Introduction: The aim of this study was to determine whether the manner in which a target force is approached can influence the electromyographic (EMG) and mechanical parameters evoked by transcranial magnetic stimulation (TMS) during brief muscle contractions. Methods: The amplitude of motor‐evoked potentials (MEP) and superimposed twitch and the duration of the silent period were recorded in 8 healthy participants in response to TMS delivered during brief isometric voluntary contractions of the quadriceps maintaining a target force (10% and 50% of maximal voluntary force) or gradually increasing or decreasing to reach this point. Results: MEP and superimposed twitch, unlike the silent period, are influenced by the manner of reaching a low force. Conclusions: Clear instructions must be provided to research participants and patients. Rapidly increasing to a target force without exceeding it and maintaining the force before the delivery of TMS results in stable, representative MEP amplitudes.

Item Type:	Article
Subjects:	B100 Anatomy, Physiology and Pathology
Department:	Faculties > Health and Life Sciences > Sport, Exercise and Rehabilitation
Depositing User:	Becky Skoyles
Date Deposited:	21 Sep 2018 11:51
Last Modified:	11 Oct 2019 19:15
URI:	http://nrl.northumbria.ac.uk/id/eprint/35865

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