Mirror Visual Feedback Combining Vibrotactile Stimulation Promotes Embodiment Perception: An Electroencephalogram...

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Human-Computer Interaction

Background:

• Mirror Visual Feedback (MVF) is crucial for neurorehabilitation, but its efficacy depends on sustained embodiment perception.
• Enhancing embodiment perception is key to maximizing the benefits of MVF.

Purpose of the Study:

• To investigate the integration of vibrotactile stimulation with MVF to enhance embodiment perception.
• To explore the underlying mechanisms of MVF using electroencephalogram (EEG) and behavioral measures.

Main Methods:

• Participants performed hand movements while viewing their reflection in a mirror, with or without vibrotactile stimulation on the active hand.
• Objective measures included latency time (LT) and EEG signals.
• Subjective data were collected using an embodiment questionnaire (EQ).

Main Results:

• Continuous and intermittent vibrotactile stimulation significantly enhanced subjective embodiment perception compared to no vibration.
• EEG analysis revealed increased motor cortical activation in the alpha band on the static side under vibration conditions.
• No significant differences were found in neural communication efficiency across conditions.

Conclusions:

• Combining MVF with vibrotactile stimulation strengthens embodiment perception and increases motor cortical activation.
• This integrated approach provides an evidence-based protocol to facilitate neurorehabilitation, especially for stroke patients.