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Related Concept Videos

Tactile and Chemical Senses01:27

Tactile and Chemical Senses

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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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Somatosensation01:33

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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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Synesthesia01:27

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Synesthesia is a remarkable condition where stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway. People with synesthesia experience a blending or crossing of their senses, such as sight and sound, leading to cross-modal sensations. In this condition, the stimulation of one sense, such as hearing a number or musical note, triggers an experience of another sense, like sensing a specific color, taste, or smell. People...
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Depth Perception and Spatial Vision01:15

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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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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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Sensory Perception: Organization of the Somatosensory System01:11

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The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
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Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback
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Tactile and Haptic Illusions.

S J Lederman, L A Jones

    IEEE Transactions on Haptics
    |March 11, 2016
    PubMed
    Summary
    This summary is machine-generated.

    This review explores tactile and haptic illusions, categorizing them by object properties (material, geometric) and spatial perception (body, external). Understanding these illusions aids in designing better tactile and haptic displays.

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    Area of Science:

    • Neuroscience
    • Human-Computer Interaction
    • Perception Psychology

    Background:

    • Tactile and haptic illusions are perceptual phenomena that challenge our understanding of touch and proprioception.
    • Research in this area is crucial for advancing sensory substitution and virtual reality technologies.

    Purpose of the Study:

    • To survey and categorize existing research on robust tactile and haptic illusions.
    • To analyze the functional properties and neural underpinnings of these illusions.
    • To discuss the implications of these illusions for the design of advanced tactile and haptic displays.

    Main Methods:

    • Literature review and synthesis of research on tactile and haptic illusions.
    • Categorization of illusions based on perceptual domain (object properties, spatial perception).
    • Analysis of functional and neural mechanisms where available.

    Main Results:

    • Illusions are classified into two main categories: object properties (material vs. geometric) and haptic space (self vs. external).
    • The paper details specific illusions within each category, discussing their characteristics.
    • Functional and neural bases are explored, linking illusion mechanisms to sensory processing.

    Conclusions:

    • Tactile and haptic illusions provide valuable insights into sensory processing.
    • Understanding these illusions is key to developing more effective and immersive tactile and haptic feedback systems.
    • The survey highlights key themes and future research directions in the field.