Electrocortical activity prior to predictable and unpredictable stimuli requiring a motor response

Tércio Apolinário-Souza; Juliana O. Parma; Vinícius R. Carvalho; Maicon R. Albuquerque; Guilherme M. Lage; Lidiane A. Fernandes

doi:10.20338/bjmb.v16i3.299

Electrocortical activity prior to predictable and unpredictable stimuli requiring a motor response

Authors

Tércio Apolinário-Souza Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil - edf.tercio@hotmail.com
Juliana O. Parma Auburn University, Auburn, United States
Vinícius R. Carvalho Electrical Engineering Post-graduation Program - Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
Maicon R. Albuquerque Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
Guilherme M. Lage Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
Lidiane A. Fernandes Universidade Federal de Juiz de Fora, Governador Valadares, MG, Brazil

DOI:

https://doi.org/10.20338/bjmb.v16i3.299

Keywords:

Motor Control, Attention, Biasing, EEG, Motor learning

Abstract

BACKGROUND: The fronto-central slow-wave known as the contingent negative variation (CNV) is an electroencephalographic measure related to the ability of the motor system to extract spatial-temporal regularities to produce a motor response.

AIM: This study aimed to investigate the levels of electrocortical activity prior to predictable and unpredictable stimuli in a motor control task, and the association between CNV and reaction time (RT).

METHOD: Seventeen participants performed a task that consisted of removing the right index finger from the space bar as fast as possible after stimulus onset. All participants practiced under both a predictable (PC) and an unpredictable (UC) context.

RESULTS: Results indicated that RT under the unpredictable context was slower than under the predictable context. However, CNV levels under predictable and unpredictable contexts did not differ.

CONCLUSION: The certainty of stimulus appearance in the UC may have produced effects similar to those under the PC, resulting in similar CNV levels. However, the use of this mechanism under the UC was suboptimal to motor performance.

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Published

2022-09-01

How to Cite

Apolinário-Souza, T., Parma, J. O., Carvalho, V. R., Albuquerque, M. R., Lage, G. M., & Fernandes, L. A. (2022). Electrocortical activity prior to predictable and unpredictable stimuli requiring a motor response. Brazilian Journal of Motor Behavior, 16(3), 240–253. https://doi.org/10.20338/bjmb.v16i3.299

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Issue

Vol. 16 No. 3 (2022)

Section

Research Articles

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