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Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
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Low-cost, microcontroller-based, two-channel piezoelectric bender device for somatosensory experiments.

Lucy Yan, Luke E Hallum

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |October 6, 2020
    PubMed
    Summary

    This study presents a low-cost, open-source piezoelectric bender device for tactile neuroscience experiments. The system enables precise somatosensory stimulation, aiding research into how the nervous system processes touch.

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    Area of Science:

    • Somatosensory Neuroscience
    • Systems Neuroscience
    • Biophysics

    Background:

    • Understanding how the nervous system encodes multiple tactile features is crucial in somatosensory neuroscience.
    • Developing precise experimental tools is essential for probing tactile stimulus encoding.

    Purpose of the Study:

    • To detail a novel microcontroller-based piezoelectric bender device for tactile experiments.
    • To demonstrate the device's capability for precise and reliable somatosensory stimulation.
    • To facilitate advancements in systems neuroscience research.

    Main Methods:

    • Utilized an Arduino Due microcontroller and dual 12-bit digital-to-analog converters for independent stimulation.
    • Employed laser Doppler vibrometry to model and implement the benders' structural mechanics.
    • Recorded electrophysiological responses in cockroach peripheral nervous system and rat vibrissae ex vivo.

    Main Results:

    • The device delivered precise, reliable somatosensory stimulation.
    • Tuning curves and bandwidths of multi-unit populations were derived from electrophysiological recordings.
    • The system proved effective for stimulating both insect and mammalian mechanosensory systems.

    Conclusions:

    • The developed microcontroller-based system offers a low-cost, open-source solution for tactile neuroscience.
    • This system can accelerate research in systems neuroscience by providing a versatile tool for tactile stimulation.
    • The device's adaptability and community support through Arduino can foster wider adoption and innovation.