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A portable tactile sensory diagnostic device.

V Tannan1, R G Dennis, Z Zhang

  • 1Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.

Journal of Neuroscience Methods
|June 1, 2007
PubMed
Summary
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Researchers developed a portable, advanced vibrotactile stimulator for precise multi-site skin stimulation. This new device offers independent control and automated skin detection, improving tactile research accuracy.

Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Sensory Science

Background:

  • Current multi-site vibratory skin stimulation methods face challenges in precise stimulus delivery, including phase, amplitude, and frequency control.
  • Previous two-point stimulator (TPS) development addressed some limitations but lacked portability and advanced control features.

Purpose of the Study:

  • To design and fabricate an improved, portable vibrotactile stimulator with enhanced control capabilities for multi-site skin stimulation.
  • To address limitations of existing devices, enabling simultaneous stimulation of two distinct skin sites with independent parameters.

Main Methods:

  • Development of a portable, lightweight vibrotactile stimulator with two independently controlled units.
  • Integration of automated skin surface detection for precise stimulus delivery control.

Related Experiment Videos

  • Utilized a modified Bekesy tracking method to assess simultaneous amplitude discrimination in human subjects.

    • Main Results:

    • The new device offers portability, independent control of amplitude, frequency, and phase for dual-site stimulation.
    • Automated skin detection ensures accurate and consistent stimulus application.
    • Demonstrated the device's utility by evaluating simultaneous amplitude discrimination in 20 participants.

    Conclusions:

    • The enhanced vibrotactile stimulator provides a versatile and accurate tool for tactile sensory research in various settings.
    • The device's improvements facilitate more sophisticated investigations into multi-site tactile perception and discrimination.
    • Facilitates broader accessibility for non-laboratory based sensory research.