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Brain Activity in Visual-Motor Illusions With Enhanced Joint Motion Intensity
Junpei Tanabe1, Kazu Amimoto2, Katsuya Sakai3
1Department of Physical Therapy, Hiroshima Cosmopolitan University, Hiroshima, JPN.
Cureus
|September 2, 2024
Summary
Power-VMI, involving observed movements with resistance, significantly enhances brain activity in motor areas and kinesthetic illusions compared to standard VMI. This suggests greater potential for motor function rehabilitation.
Area of Science:
- Neuroscience
- Motor Control
- Cognitive Science
Background:
- Visual-motor illusion (VMI) evokes kinesthetic sensations and modulates brain activity.
- Observed movement intensity influences VMI's neural effects.
Purpose of the Study:
- To investigate differences in brain activity during VMI with varying movement intensities.
- To compare standard VMI with VMI incorporating added resistance (Power-VMI).
Main Methods:
- 14 healthy adults participated.
- Functional near-infrared spectroscopy (fNIRS) measured brain activity in motor regions.
- Standard-VMI (pure dorsiflexion) and Power-VMI (dorsiflexion with resistance) were compared.
- Visual analog scales (VAS) assessed subjective kinesthetic illusions.
Main Results:
- Power-VMI significantly increased brain activity in the premotor cortex, supplementary motor cortex, supramarginal gyrus, and superior parietal lobule compared to Standard-VMI.
- Power-VMI yielded higher kinesthetic illusion ratings (VAS).
- A positive correlation was found between superior parietal lobule activity and illusion intensity.
Conclusions:
- Power-VMI enhances motor-related brain areas and kinesthetic illusions more than Standard-VMI.
- Increased VMI intensity may improve motor function rehabilitation outcomes.
- Findings support VMI's potential for treating paralysis and movement impairments.
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