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Examining the equivalence between imagery and execution - Do imagined and executed movements code relative
James W Roberts1, Timothy N Welsh2, Caroline J Wakefield1
1Liverpool Hope University, Psychology, Action and Learning of Movement Group, School of Health Sciences, Liverpool, L16 9JD, UK.
Behavioural Brain Research
|May 21, 2019
Summary
Imagined and executed actions share neural pathways. This study shows imagined movements account for environmental features, like executed actions, supporting a common neural domain for both.
Area of Science:
- Cognitive Neuroscience
- Motor Control
- Human Movement Science
Background:
- Imagined actions recruit similar neural substrates as executed actions.
- Mental and physical chronometry studies demonstrate equivalency between imagined and executed movements, particularly in Fitts paradigm aiming tasks.
Purpose of the Study:
- To investigate the extent of neural equivalency between imagined and executed actions.
- To determine if imagined movements incorporate environmental features similarly to executed movements.
Main Methods:
- Two studies involved participants performing imagined or executed reciprocal aiming movements.
- Targets were manipulated using Ebbinghaus illusions (annuli) to alter perceived size.
- Movement time and index of difficulty were measured for various target conditions.
Main Results:
- A positive correlation between movement time and index of difficulty was observed for both imagined and executed movements.
- Movement times were extended for targets with surrounding annuli, indicating a general interference effect.
- This interference effect was consistent across both imagined and executed movements, irrespective of illusory target size.
Conclusions:
- Findings support a common neural domain for imagined and executed actions.
- The equivalence between imagined and executed actions extends to the incorporation of environmental features.
- Results elaborate on the precision of the commonality between mental and physical movement representation.
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