Wearable Sensory Substitution for Proprioception via Deep Pressure

Area of Science:

• Biomedical Engineering
• Neuroscience
• Haptics

Background:

• Proprioception, the sense of body position, is crucial for motor control.
• PIEZO2 loss of function genetic disorder results in absent proprioception and light touch sensation.
• Existing sensory substitution methods often fail to address proprioceptive deficits.

Approach:

• Developed a wearable, programmable deep pressure stimulation device for the forearm.
• Integrated a force sensor to measure applied pressure.
• Assessed device efficacy in a study with participants lacking sensory impairment.

Key Points:

• Participant calibration determined minimum detectable force (0.41 N) and maximum comfortable force (6.42 N).
• Training with the device significantly reduced virtual arm angle error.
• Angle error showed minimal increase with applied force, indicating robustness.

Conclusions:

• Deep pressure haptic feedback is a viable sensory substitution method.
• The device shows potential for individuals with PIEZO2 loss of function and other sensory deficits.
• This approach offers a new avenue for restoring proprioceptive capabilities.