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Related Concept Videos

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

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A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
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Tactile and Chemical Senses01:27

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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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Related Experiment Video

Updated: Sep 16, 2025

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
07:32

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Published on: September 1, 2016

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A Wearable Pneumatic Platform to Automatically Assess Tactile Sensitivity.

Giulia Castiglioni, Jacopo Quaglierini, Cristian Felipe Blanco-Diaz

    IEEE ... International Conference on Rehabilitation Robotics : [Proceedings]
    |July 11, 2025
    PubMed
    Summary

    This study introduces a novel wearable device for assessing tactile sensitivity, offering a portable and efficient solution for sensory rehabilitation. Preliminary results show promising accuracy, correlating well with existing tests.

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    Area of Science:

    • Neurology
    • Rehabilitation Engineering
    • Biomedical Devices

    Background:

    • Neurological disorders often cause sensory deficits, impairing object manipulation and slowing motor rehabilitation.
    • Current tactile sensitivity evaluation methods are inefficient, lacking portability and requiring extensive training.
    • Automated tactile stimulation platforms exist, but robotic systems for residual tactile sensitivity assessment are underexplored.

    Purpose of the Study:

    • To develop and evaluate a novel hand-wearable, pneumatically driven device for quantitative tactile sensitivity assessment.
    • To address the limitations of current tactile sensitivity testing methods in clinical settings.

    Main Methods:

    • A pneumatically driven, hand-wearable device utilizing an air chamber and sliding pin was designed.
    • The device was tested on five healthy participants to measure pressure perception thresholds.
    • Results were compared with the established Semmes-Weinstein test for validation.

    Main Results:

    • The proposed device achieved pressure perception thresholds around 0.01 bar (median ~0.03 bar).
    • A strong correlation (p = 0.8441) was observed between the device's measurements and the Semmes-Weinstein test.
    • Preliminary data indicates the device's potential for accurate tactile sensitivity assessment.

    Conclusions:

    • The developed wearable device offers a promising, quantitative, and reproducible method for assessing tactile sensitivity.
    • This technology has the potential to serve as a complementary tool in sensory rehabilitation and neurological assessments.
    • Further research is warranted to explore its full clinical utility and application in diverse patient populations.