Article Dans Une Revue IBRO Neuroscience Reports Année : 2023

VISUAL MOTION EXTRAPOLATION MODULATES MOTOR-RELATED CORTICAL ACTIVITY

Résumé

Background: Predicting the trajectory of a forthcoming object needs precise extrapolation of its motion parameters from the visual cues. In such task, time integration is crucial for accurate prediction. Intriguingly, performing a concurrent motor action alters time perception. Recent researches argued that motor cortex (M1) is involved in time integration, in addition to control and execute motor action. As significant modulations of alpha (~10Hz) and beta (~20Hz) EEG are quantified over M1 during its activation we investigated the modulation of M1-EEG activity during a prediction-motion task involving a concurrent motor action. Method: 12 participants had to assess whether a moving target had reappeared earlier or later than they expected, following its sudden occlusion (4 shorter and 4 longer durations compared to correct duration). The prediction-motion task was performed alone (NoAction) or with a concurrent motor task executed during occlusion (Action). The point of subjective equality (PSE) was defined from behavioral performance for each condition. After appropriate preprocessing, M1 power spectrum around disappearance and reappearance of the moving target were compared against a baseline (stationary target at the beginning of the trial) or in-between conditions. Result: The PSE decrease when a simultaneous action was executed. EEG results indicated decreased power in alpha and beta bands at disappearance, followed by a subsequent beta rebound only in Action condition. Beta power significantly increased in Action condition in comparison to NoAction condition after disappearance and before reappearance of the stimulus. Prior to reappearance, alpha power was significantly decreased in Action condition, in comparison to NoAction condition. Conclusion: When a concurrent action was performed, the occluded duration was underestimated. The decrease of alpha and beta bands reflect action preparation. The modulation of alpha oscillation within cortical motor area is exploited to generate predictions about the movement of the target.

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Dates et versions

hal-04766476 , version 1 (04-11-2024)

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Xuening Li, Robin Baurès, Sylvain Crémoux. VISUAL MOTION EXTRAPOLATION MODULATES MOTOR-RELATED CORTICAL ACTIVITY. IBRO Neuroscience Reports, 2023, 15 (Supplement 1), pp.S860. ⟨10.1016/j.ibneur.2023.08.1790⟩. ⟨hal-04766476⟩
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