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Related Concept Videos

Somatosensation01:33

Somatosensation

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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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Design Example: Resistive Touchscreen01:14

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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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Author Spotlight: Insights into the Analysis of Human Interaction with 3D Virtual Objects
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Predicting successful tactile mapping of virtual objects.

Luca Brayda, Claudio Campus, Monica Gori

    IEEE Transactions on Haptics
    |May 9, 2014
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    Summary
    This summary is machine-generated.

    This study introduces a haptic mouse (TAMO) to evaluate tactile maps for improving spatial ability in visually impaired individuals. Combining behavioral and subjective measures accurately predicts mapping performance.

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    Area of Science:

    • Human-Computer Interaction
    • Haptics
    • Spatial Cognition

    Background:

    • Orientation and Mobility (O&M) programs aim to enhance spatial abilities for blind and visually impaired individuals.
    • Evaluating tactile display devices for virtual object representation is crucial for O&M.
    • Understanding cognitive map construction through touch is essential for developing effective assistive technologies.

    Purpose of the Study:

    • To introduce and evaluate a minimalistic haptic device, the TActile MOuse (TAMO), for assessing spatial abilities.
    • To investigate the construction of cognitive maps using tactile representations of virtual spaces.
    • To determine the effectiveness of psychophysical, behavioral, and subjective parameters in evaluating tactile mapping performance.

    Main Methods:

    • Utilized a mouse-shaped haptic device (TAMO) for tactile feedback.
    • Employed blindfolded sighted subjects to simulate visual impairment.
    • Assessed low-level perception (passive stimulation) and high-level information integration (active exploration).
    • Measured psychophysical, behavioral (information acquisition), and subjective (cognitive load) parameters.

    Main Results:

    • Joint analysis of information acquisition and cognitive load accurately predicts mapping performance.
    • The TAMO device effectively assesses spatial abilities through tactile exploration.
    • Both low-level perceptual and high-level integration processes are vital for cognitive map construction.

    Conclusions:

    • The TAMO device offers a practical method for evaluating tactile spatial displays.
    • This approach can aid in assessing and improving the spatial abilities of visually impaired individuals.
    • Combining objective behavioral and subjective cognitive load measures provides a comprehensive evaluation of tactile mapping.