Tactile Sensation Assisted Motor Imagery Training for Enhanced BCI Performance: A Randomized Controlled Study

Area of Science:

• Neuroscience
• Biomedical Engineering
• Rehabilitation Technology

Background:

• Motor imagery (MI) is crucial for brain-computer interface (BCI) control.
• Conventional neurofeedback training can be challenging for some individuals.
• Improving MI performance is key to enhancing BCI usability.

Purpose of the Study:

• To introduce and evaluate a novel tactile sensation assisted motor imagery (SA-MI) training approach.
• To assess the effectiveness of SA-MI training in improving MI performance for BCI applications.
• To compare SA-MI training with conventional MI tasks.

Main Methods:

• Twenty-six subjects were divided into a training group and a control group.
• The training group received tactile stimulation during MI tasks in one block.
• Both groups performed MI tasks across three blocks, with tactile assistance only in the second block for the training group.

Main Results:

• The training group showed a significant improvement in MI performance after SA-MI training (83.2% vs. 73.2%).
• No significant performance difference was observed in the control group.
• SA-MI training enhanced motor-related cortex activation (ERD/ERS) and alpha-beta band R² coefficients.

Conclusions:

• SA-MI training effectively enhances motor imagery performance for BCI.
• This method offers a promising alternative for individuals facing difficulties with traditional neurofeedback.
• SA-MI training presents a novel framework for advancing MI-based BCI technology.