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Unexpected acoustic stimulation during action preparation reveals gradual re-specification of movement direction509.32 kB
Accepted VersionCC BY-NC-ND V4.0, Open Access
Journal article
Unexpected acoustic stimulation during action preparation reveals gradual re-specification of movement direction
Neuroscience, Vol.348, pp.23-32
2017
PMID: 28215747
Abstract
A loud acoustic stimulus (LAS) is often used as a tool to investigate motor preparation in simple reaction time (RT) tasks, where all movement parameters are known in advance. In this report, we used a LAS to examine direction specification in simple and choice RT tasks. This allowed us to investigate how the specification of movement direction unfolds during the preparation period. In two experiments, participants responded to the appearance of an imperative stimulus (IS) with a ballistic wrist force directed toward one of two targets. In probe trials, a LAS (120 dBa) was delivered around the time of IS presentation. In Experiment 1, RTs in the simple RT task were faster when the LAS was presented, but the effect on the movement kinematics was negligible. In the Choice RT task, however, movement direction variability increased when the LAS was presented. In Experiment 2, when we primed movements toward one direction, our analyses revealed that the longer participants took to start a movement, the more accurate their responses became. Our results show not only that movement direction reprogramming occurs quickly and continuously, but also that LAS can be a valuable tool to obtain meaningful readouts of the motor system’s preparatory state.
Details
- Title
- Unexpected acoustic stimulation during action preparation reveals gradual re-specification of movement direction
- Authors
- Welber Marinovic (Author) - Curtin UniversityJames Tresilian (Author) - University of WarwickJack L Chapple (Author) - The University of QueenslandStephan Riek (Author) - The University of QueenslandTimothy J Carroll (Author) - The University of Queensland
- Publication details
- Neuroscience, Vol.348, pp.23-32
- Publisher
- Elsevier Ltd
- Date published
- 2017
- DOI
- 10.1016/j.neuroscience.2017.02.016
- ISSN
- 1873-7544; 0306-4522
- PMID
- 28215747
- Copyright note
- © 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercialNoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
- Organisation Unit
- Graduate Research School; University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99472606802621
- Output Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Neurosciences