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All talk? Challenging the use of left-temporal EEG alpha oscillations as valid measures of verbal processing and conscious motor control

journal contribution
posted on 14.08.2020 by Johnny VV Parr, Germano Gallicchio, Neil R Harrison, Ann-Kathrin Johnen, Greg Wood
This study tested the validity of EEG left-temporal alpha power and upper-alpha T7-Fz connectivity as indices of verbal activity and conscious motor control. Participants (n = 20) reached for, and transported, a jar under three conditions: a control condition and two self-talk conditions aimed at eliciting either task-unrelated verbal processing or task-related conscious control, while EEG and hand kinematics were recorded. Compared to the control condition, both self-talk conditions increased self-reported verbal processing, but only the task-related self-talk condition increased lefttemporal activity (i.e., alpha power decreased). However, as cortical activity increased across the entire scalp topography, conscious control likely elicits a multitude of processes that may not be explained by left-temporal activity or verbal processing alone, but by a widespread decrease in neural efficiency. No significant effects for T7-Fz connectivity were detected. Results suggest that lefttemporal EEG alpha oscillations are unlikely to uniquely reflect verbal processing during conscious motor control.

History

School

  • Sport, Exercise and Health Sciences

Published in

Biological Psychology

Pages

107943 - 107943

Publisher

Elsevier BV

Version

AM (Accepted Manuscript)

Publisher statement

This paper was accepted for publication in the journal Biological Psychology and the definitive published version is available at https://doi.org/10.1016/j.biopsycho.2020.107943

Acceptance date

27/07/2020

Publication date

2020-08-08

ISSN

0301-0511

Language

en

Depositor

Mr Germano . Deposit date: 11 August 2020

Article number

107943

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