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  Synchronization between keyboard typing and neural oscillations

Duprez, J., Stokkermans, M., Drijvers, L., & Cohen, M. X. (2021). Synchronization between keyboard typing and neural oscillations. Journal of Cognitive Neuroscience, 33(5), 887-901. doi:10.1162/jocn_a_01692.

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Duprez_etal_2021_Synchronization between keyboard typing and neural oscilliations.pdf (Publisher version), 908KB
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Duprez, J.1, Author
Stokkermans, M.1, Author
Drijvers, Linda2, 3, 4, 5, Author              
Cohen, M. X.1, Author
Affiliations:
1Radboud University Medical Center, Nijmegen, The Netherlands, ou_persistent22              
2Communication in Social Interaction, Radboud University Nijmegen, External Organizations, ou_3055481              
3Other Research, MPI for Psycholinguistics, Max Planck Society, Nijmegen, NL, ou_55217              
4Donders Institute for Brain, Cognition and Behaviour, External Organizations, ou_55236              
5The Communicative Brain, MPI for Psycholinguistics, Max Planck Society, Wundtlaan 1, 6525 XD Nijmegen, NL, ou_3275695              

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 Abstract: Rhythmic neural activity synchronizes with certain rhythmic behaviors, such as breathing, sniffing, saccades, and speech. The extent to which neural oscillations synchronize with higher-level and more complex behaviors is largely unknown. Here we investigated electrophysiological synchronization with keyboard typing, which is an omnipresent behavior daily engaged by an uncountably large number of people. Keyboard typing is rhythmic with frequency characteristics roughly the same as neural oscillatory dynamics associated with cognitive control, notably through midfrontal theta (4 -7 Hz) oscillations. We tested the hypothesis that synchronization occurs between typing and midfrontal theta, and breaks down when errors are committed. Thirty healthy participants typed words and sentences on a keyboard without visual feedback, while EEG was recorded. Typing rhythmicity was investigated by inter-keystroke interval analyses and by a kernel density estimation method. We used a multivariate spatial filtering technique to investigate frequency-specific synchronization between typing and neuronal oscillations. Our results demonstrate theta rhythmicity in typing (around 6.5 Hz) through the two different behavioral analyses. Synchronization between typing and neuronal oscillations occurred at frequencies ranging from 4 to 15 Hz, but to a larger extent for lower frequencies. However, peak synchronization frequency was idiosyncratic across subjects, therefore not specific to theta nor to midfrontal regions, and correlated somewhat with peak typing frequency. Errors and trials associated with stronger cognitive control were not associated with changes in synchronization at any frequency. As a whole, this study shows that brain-behavior synchronization does occur during keyboard typing but is not specific to midfrontal theta.

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Language(s): eng - English
 Dates: 2021-02-112021-05
 Publication Status: Published in print
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 Rev. Type: Peer
 Identifiers: DOI: 10.1162/jocn_a_01692
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Title: Journal of Cognitive Neuroscience
Source Genre: Journal
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Publ. Info: Cambridge, MA : MIT Press Journals
Pages: - Volume / Issue: 33 (5) Sequence Number: - Start / End Page: 887 - 901 Identifier: ISSN: 0898-929X
CoNE: https://pure.mpg.de/cone/journals/resource/991042752752726