TY - JOUR
T1 - On the boundaries between decision and action
T2 - Effector-selective lateralization of beta-frequency power is modulated by the lexical frequency of printed words
AU - Scaltritti, Michele
AU - Job, Remo
AU - Alario, F. Xavier
AU - Sulpizio, Simone
N1 - Funding Information:
F.-Xavier Alario's work has been supported by grants ANR-16-CONV-0002 (ILCB) and the Excellence Initiative of Aix-Marseille University (A*MIDEX).
Publisher Copyright:
© 2020 Massachusetts Institute of Technology.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020
Y1 - 2020
N2 - Current computational and neuroscientific models of decision-making posit a discrete, serial processing distinction between upstream decisional stages and downstream processes of motor-response implementation. We investigated this framework in the context of two-alternative forced-choice tasks on linguistic stimuli, words and pseudowords. In two experiments, we assessed the impact of lexical frequency and action semantics on two effector-selective EEG indexes of motor-response activation: the lateralized readiness potential and the lateralization of beta-frequency power. This allowed us to track potentially continuous streams of processing progressively mapping the evaluation of linguistic stimuli onto corresponding response channels. Whereas action semantics showed no influence on EEG indexes of motor-response activation, lexical frequency affected the lateralization of response-locked beta-frequency power. We argue that these observations point toward a continuity between linguistic processing of word input stimuli and implementation of corresponding choice in terms of motor behavior. This interpretation challenges the commonly held as-sumpti on of a di screte processi ng di sti ncti on between decisional and motor-response processes in the context of decisions based on symbolic stimuli. ■.
AB - Current computational and neuroscientific models of decision-making posit a discrete, serial processing distinction between upstream decisional stages and downstream processes of motor-response implementation. We investigated this framework in the context of two-alternative forced-choice tasks on linguistic stimuli, words and pseudowords. In two experiments, we assessed the impact of lexical frequency and action semantics on two effector-selective EEG indexes of motor-response activation: the lateralized readiness potential and the lateralization of beta-frequency power. This allowed us to track potentially continuous streams of processing progressively mapping the evaluation of linguistic stimuli onto corresponding response channels. Whereas action semantics showed no influence on EEG indexes of motor-response activation, lexical frequency affected the lateralization of response-locked beta-frequency power. We argue that these observations point toward a continuity between linguistic processing of word input stimuli and implementation of corresponding choice in terms of motor behavior. This interpretation challenges the commonly held as-sumpti on of a di screte processi ng di sti ncti on between decisional and motor-response processes in the context of decisions based on symbolic stimuli. ■.
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U2 - 10.1162/jocn_a_01606
DO - 10.1162/jocn_a_01606
M3 - Article
C2 - 32662730
AN - SCOPUS:85092056684
VL - 32
SP - 2131
EP - 2144
JO - Journal of Cognitive Neuroscience
JF - Journal of Cognitive Neuroscience
SN - 0898-929X
IS - 11
ER -