Sensory Substitution for Tactile Feedback in Upper Limb Prostheses.

Area of Science:

• Biomedical Engineering
• Neuroscience
• Rehabilitation Technology

Background:

• Commercially available prosthetic devices lack accurate, non-invasive tactile feedback, hindering control and increasing rejection rates.
• Existing methods for simulating hand sensation in upper limb loss patients are invasive, costly, or suboptimal.
• There is a critical need for improved sensory feedback systems in upper limb prosthetics.

Purpose of the Study:

• To propose, build, and implement a novel device for tactile feedback in upper limb prostheses.
• To develop an adaptable tactile sensing glove and an audio feedback system for sensory substitution.
• To investigate the brain's plasticity for communicating touch through auditory pathways.

Main Methods:

• Developed an adaptable tactile sensing glove with integrated force sensors for artificial limbs.
• Implemented an audio feedback system mapping force magnitude and location to sound volume and frequency.
• Leveraged sensory substitution by utilizing existing auditory and tactile brain pathways.

Main Results:

• Successfully manufactured a novel tactile feedback device for proof of concept.
• Demonstrated the feasibility of mapping tactile sensor data to audio parameters (volume and frequency).
• The device integrates seamlessly with existing artificial limbs.

Conclusions:

• The developed device offers a promising non-invasive approach to tactile feedback for upper limb prosthetics.
• Sensory substitution via audio feedback shows potential for enhancing prosthesis control and user embodiment.
• Further testing is required to assess efficacy and guide future research and commercialization efforts.