Cited by 101Transcranial Magnetic Stimulation StudiesMotor Control and AdaptationNeural and Behavioral Psychology Studies

Expectancy Induces Dynamic Modulation of Corticospinal Excitability

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van Elswijk, Gijs, Kleine, Bert U., Overeem, Sebastiaan, Stegeman, Dick F.·2007·Journal of Cognitive Neuroscience

Abstract

Behavioral studies using motor preparation paradigms have revealed that increased expectancy of a response signal shortens reaction times (RTs). Neurophysiological data suggest that in such paradigms, not only RT but also neuronal activity in the motor structures involved is modulated by expectancy of behaviorally relevant events. Here, we directly tested whether expectancy of a response signal modulates excitability of the corticospinal system used in the subsequent movement. We combined single- and paired-pulse transcranial magnetic stimulation (TMS) over the primary motor cortex with a simple RT task with variable preparatory delays. We found that, in line with typical behavioral observations, the subjects' RTs decreased with increasing response signal expectancy. TMS results revealed a modulation of corticospinal excitability in correspondence with response signal expectancy. Besides an increased excitability over the time-course of the preparatory delay, corticospinal excitability transiently increased whenever a response signal was expected. Paired-pulse TMS showed that this modulation is unlikely to be mediated by excitability changes in interneuronal inhibitory or facilitatory networks in the primary motor cortex. Changes in corticospinal synchronization or other mechanisms involving spinal circuits are candidates mediating the modulation of corticospinal excitability by expectancy.

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Crossref · 10.1162/jocn.2007.19.1.121

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Authors
van Elswijk, G., Kleine, B. U., Overeem, S., & Stegeman, D. F.
Affiliations
Radboud University Medical Center (NL)
Venue
Journal of Cognitive Neuroscience
Published
2007-01-01
Volume
19
Issue
1
Pages
121-131
ISSN
  • 0898-929X (ISSN-L)
  • 1530-8898
OpenAlex
W2111495216
Cited by
101
References
50
Citations by year
2026: 5 · 2025: 2 · 2024: 2 · 2023: 2 · 2022: 7 · 2021: 6 · 2020: 4 · 2019: 3 · 2018: 8 · 2017: 3 · 2016: 2 · 2015: 3 · 2014: 7 · 2013: 7 · 2012: 3
FWCI
6.38
Type
journal article
Language
en
Open access
Licence
other-oa
Locations
  • Journal of Cognitive Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • VU Research Portal (publishedVersion)
  • Radboud Repository (Radboud University) (submittedVersion, other-oa)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Neurology › Transcranial Magnetic Stimulation Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
Keywords
response expectancy, corticospinal excitability, primary motor cortex, reaction time, motor preparation, paired-pulse transcranial magnetic stimulation, spinal cord circuits
MeSH terms
Adult, Electric Stimulation, Female, Humans, Inhibition, Psychological, Male, Motor Cortex, Psychomotor Performance, Pyramidal Tracts, Reaction Time, Time Factors, Nonlinear Dynamics, Evoked Potentials, Motor, Intention, Transcranial Magnetic Stimulation

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