Unexpected acoustic stimulation during action preparation reveals gradual re-specification of movement direction
© 2017 IBRO. 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...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
Pergamon
2017
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| Online Access: | http://purl.org/au-research/grants/arc/DP160102001 http://hdl.handle.net/20.500.11937/63437 |
| _version_ | 1848761087443337216 |
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| author | Marinovic, Welber Tresilian, J. Chapple, J. Riek, S. Carroll, T. |
| author_facet | Marinovic, Welber Tresilian, J. Chapple, J. Riek, S. Carroll, T. |
| author_sort | Marinovic, Welber |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 IBRO. 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. |
| first_indexed | 2025-11-14T10:26:06Z |
| format | Journal Article |
| id | curtin-20.500.11937-63437 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:26:06Z |
| publishDate | 2017 |
| publisher | Pergamon |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-634372022-10-27T04:13:13Z Unexpected acoustic stimulation during action preparation reveals gradual re-specification of movement direction Marinovic, Welber Tresilian, J. Chapple, J. Riek, S. Carroll, T. © 2017 IBRO. 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. 2017 Journal Article http://hdl.handle.net/20.500.11937/63437 10.1016/j.neuroscience.2017.02.016 http://purl.org/au-research/grants/arc/DP160102001 Pergamon fulltext |
| spellingShingle | Marinovic, Welber Tresilian, J. Chapple, J. Riek, S. Carroll, T. Unexpected acoustic stimulation during action preparation reveals gradual re-specification of movement direction |
| title | Unexpected acoustic stimulation during action preparation reveals gradual re-specification of movement direction |
| title_full | Unexpected acoustic stimulation during action preparation reveals gradual re-specification of movement direction |
| title_fullStr | Unexpected acoustic stimulation during action preparation reveals gradual re-specification of movement direction |
| title_full_unstemmed | Unexpected acoustic stimulation during action preparation reveals gradual re-specification of movement direction |
| title_short | Unexpected acoustic stimulation during action preparation reveals gradual re-specification of movement direction |
| title_sort | unexpected acoustic stimulation during action preparation reveals gradual re-specification of movement direction |
| url | http://purl.org/au-research/grants/arc/DP160102001 http://hdl.handle.net/20.500.11937/63437 |