Computer vision technology-based face mirroring system providing mirror therapy for Bell's palsy patients

Area of Science:

• Neurology
• Rehabilitation Medicine
• Biomedical Engineering

Background:

• Mirror therapy (MT) is a recognized treatment for Bell's palsy (BP).
• Conventional bifold mirror apparatuses may limit MT effectiveness.
• Factors influencing facial embodiment in BP patients require further investigation.

Purpose of the Study:

• To assess the feasibility of a novel Face Mirroring System (FMS) for MT in BP patients.
• To compare the FMS with conventional mirror book (MB) therapy regarding user experience and facial embodiment.
• To explore the impact of different facial tasks on facial embodiment perception.

Main Methods:

• A within-subject design trial involving 36 BP patients.
• Patients used both FMS and MB apparatuses randomly for specific facial tasks (reset, expression, enunciation).
• User experience and perception of facial embodiment were evaluated via questionnaires.

Main Results:

• The FMS demonstrated superior user experience and facial embodiment perception compared to the MB.
• Facial expression and enunciation tasks significantly enhanced facial embodiment perception with both systems.
• Patients reported stronger agreement with facial embodiment statements during active tasks.

Conclusions:

• The FMS is a feasible and optimal setup for delivering MT to BP patients.
• Integrating speech with motor training is a highly effective strategy for improving facial embodiment.
• Combining multiple sensory feedbacks can enhance the perception of facial embodiment.