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  Ipsi- and contralateral EEG reactions to transcranial magnetic stimulation

Komssi, S., Aronen, H. J., Huttunen, J., Kesäniemi, M., Soinne, L., Nikulin, V. V., et al. (2002). Ipsi- and contralateral EEG reactions to transcranial magnetic stimulation. Clinical Neurophysiology, 113(2), 175-184. doi:10.1016/S1388-2457(01)00721-0.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-415A-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-6B9D-7
Genre: Journal Article

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 Creators:
Komssi, Soile, Author
Aronen, Hannu J., Author
Huttunen, Joha, Author
Kesäniemi, Martti, Author
Soinne, Lauri, Author
Nikulin, Vadim V.1, Author              
Ollikainen, Marko, Author
Roine, Risto O., Author
Karhu, Jari, Author
Savolainen, Sauli, Author
Ilmoniemi, Risto J., Author
Affiliations:
1External Organizations, ou_persistent22              

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Free keywords: Transcranial magnetic stimulation (TMS); Electroencephalography; Cortical connectivity
 Abstract: Objectives: Transcranial magnetic stimulation (TMS) and high-resolution electroencephalography (EEG) were used to study the spreading of cortical activation in 6 healthy volunteers. Methods: Five locations in the left sensorimotor cortex (within 3 cm2) were stimulated magnetically, while EEG was recorded with 60 scalp electrodes. A frameless stereotactic method was applied to determine the anatomic locus of stimulation and to superimpose the results on magnetic resonance images. Scalp potential and cortical current-density distributions were derived from averaged electroencephalographic (EEG) data. Results: The maxima of the ipsilateral activation were detected at the gyrus precentralis, gyrus supramarginalis, and lobulus parietalis superior, depending on the subject. Activation over the contralateral cortex was observed in all subjects, appearing at 22±2 ms (range 17–28); the maxima were located at the gyrus precentralis, gyrus frontalis superior, and the lobulus parietalis inferior. Contralateral EEG waveforms showed consistent changes when different sites were stimulated: stimulation of the two most medial points evoked the smallest responses fronto-parietally. Conclusions: With the combination of TMS, EEG, and magnetic resonance imaging, an adequate spatiotemporal resolution may be achieved for tracing the intra- and interhemispheric spread of activation in the cortex caused by a magnetic pulse.

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Language(s): eng - English
 Dates: 2001-11-072001-12-142002-02
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1016/S1388-2457(01)00721-0
 Degree: -

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Title: Clinical Neurophysiology
  Other : Clin. Neurophysiol.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 113 (2) Sequence Number: - Start / End Page: 175 - 184 Identifier: ISSN: 1388-2457
CoNE: https://pure.mpg.de/cone/journals/resource/954926941726