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  Effects of pointing direction and direction predictability on event-related lateralizations of the EEG

Berndt, I., Franz, V., Bülthoff, H., & Wascher, E. (2002). Effects of pointing direction and direction predictability on event-related lateralizations of the EEG. Human Movement Science, 21(3), 387-410. doi:10.1016/S0167-9457(02)00122-7.

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Berndt, I1, 2, Author              
Franz, VH1, 2, Author              
Bülthoff, HH1, 2, Author              
Wascher, E, Author
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: In two experiments, we investigated hemispheric electroencephalography (EEG) differences in 9(12) healthy volunteers during pointing to lateral and central targets. The questions addressed were whether horizontal pointing direction and the predictability of pointing direction modulated hemispheric differences (event-related lateralizations of the EEG = ERLs). To vary pointing direction predictability, targets were displayed either randomly at one of nine different positions on a screen (random) or at the same horizontal position in five subsequent trials (sequenced) while vertical positions varied randomly. Event-related lateralizations (ERLs) varied with pointing direction. This was true across changes in target eccentricity and pointing distance. Foci of the ERLs were in premotor and posterior parietal cortex, which might reflect the critical involvement of these areas in the control of visually guided reaching. Direction predictability reduced the parietal and premotor ERL before pointing onset, probably reflecting a lesser effort in visuomotor transformation. Predictability also added an overlying N2pc component to the early ERL after target onset and increased direction effects during movement.

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 Dates: 2002-09
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: DOI: 10.1016/S0167-9457(02)00122-7
BibTex Citekey: 1901
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Title: Human Movement Science
Source Genre: Journal
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Publ. Info: Amsterdam [Netherlands] : North-Holland
Pages: - Volume / Issue: 21 (3) Sequence Number: - Start / End Page: 387 - 410 Identifier: ISSN: 0167-9457
CoNE: https://pure.mpg.de/cone/journals/resource/954925484691