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Theta Burst Stimulation over the human primary motor cortex modulates neural processes involved in movement preparation

Ortu, Enzo and Ruge, Diane and Deriu, Franca and Rothwell, John C. (2009) Theta Burst Stimulation over the human primary motor cortex modulates neural processes involved in movement preparation. Clinical Neurophysiology, Vol. 120 (6), p. 1195-1203. ISSN 1388-2457. Article.

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DOI: 10.1016/j.clinph.2009.04.001

Abstract

Objective. To test whether inhibitory continuous Theta Burst (cTBS) transcranial magnetic stimulation (TMS) can alter neural activity involved in planning and execution of a self-paced movement.
Methods. In seven subjects, cTBS was applied over either the left or right primary motor cortex (left M1 and right M1) and the left dorsal premotor cortex (left PMd) in different experimental sessions. Motor evoked potentials (MEP) at rest were measured as well as the two main components of the movement related cortical potential (MRCP), the Bereitschaftspotential (BP) and the negative slope (NS’), prior to self-paced right thumb opposition.
Results. cTBS suppressed contralateral MEPs when it was applied over left M1, right M1 and left PMd. In addition, cTBS over left M1, but not at any other location, reduced the amplitude of the NS’ and tended to shorten the BP onset without changing EMG activity associated with voluntary muscular output. There was a significant correlation between the percent suppression of the MEP and the reduction in amplitude of the total MRCP (BP + NS’).
Conclusions. cTBS can produce long-lasting effects on brain activity involved in the preparation and execution of a volitional movement.

Item Type:Article
ID Code:3526
Status:Published
Refereed:Yes
Uncontrolled Keywords:Repetitive TMS, movement preparation, movement-related cortical potentials
Subjects:Area 05 - Scienze biologiche > BIO/09 Fisiologia
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze biomediche
001 Università di Sassari > 03 Istituti > Clinica neurologica
Publisher:Elsevier
ISSN:1388-2457
Copyright Holders:© 2009 International Federation of Clinical Neurophysiology
Deposited On:25 Jan 2010 09:19

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