Adding vibrotactile feedback to a myoelectric-controlled hand improves performance when online visual feedback is...

Area of Science:

• Biomedical Engineering
• Rehabilitation Technology
• Human-Computer Interaction

Background:

• Myoelectric-controlled hands offer functional restoration but often lack sensory feedback.
• Limited visual feedback in real-world scenarios poses challenges for effective prosthesis control.

Purpose of the Study:

• To evaluate the impact of vibrotactile feedback on myoelectric hand performance during a functional task with disturbed visual input.
• To determine if tactile feedback enhances grasping and manipulation accuracy and efficiency.

Main Methods:

• Able-bodied subjects used a myoelectric hand to perform the modified Box & Blocks test under three conditions: full light, dark with tactile feedback, and dark without tactile feedback.
• Performance was assessed by measuring the time to transfer blocks and counting grasping errors using an infrared camera.

Main Results:

• Providing vibrotactile feedback significantly reduced the time required to transfer blocks compared to no tactile feedback.
• The addition of vibrotactile feedback led to a significant decrease in grasping and manipulation errors, improving accuracy.

Conclusions:

• Vibrotactile feedback integration enhances the functional performance of myoelectric-controlled hands, particularly under conditions of disturbed visual feedback.
• This sensory augmentation holds potential for improving the daily living capabilities of prosthesis users in diverse environmental conditions.