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Related Concept Videos

Tactile and Chemical Senses01:27

Tactile and Chemical Senses

433
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.
433
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.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
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Related Experiment Video

Updated: Nov 5, 2025

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback
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Applying a novel visual-to-touch sensory substitution for studying tactile reference frames.

Or Yizhar1,2, Galit Buchs3,4, Benedetta Heimler4,5

  • 1Department of Cognitive and Brain Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel. or.yizhar@mail.huji.ac.il.

Scientific Reports
|May 21, 2021
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Summary

The brain integrates visual and posture information to map touch sensations. This study shows that new proprioceptive inputs can be overridden, demonstrating flexibility in tactile spatial perception.

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Last Updated: Nov 5, 2025

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Area of Science:

  • Neuroscience
  • Sensory processing
  • Human-computer interaction

Background:

  • Accurate spatial perception is vital for goal-directed actions.
  • The brain integrates visual and somatosensory information for spatial awareness.
  • The role of body posture in tactile spatial mapping requires further investigation.

Purpose of the Study:

  • To investigate the influence of arm posture on the brain's mapping of tactile sensations to visual information.
  • To explore the flexibility of sensory integration in spatial tasks.
  • To examine whether new proprioceptive inputs can override established sensory mappings.

Main Methods:

  • Developed a novel visual-to-tactile sensory substitution device.
  • Utilized a spatial recognition task with blindfolded participants.
  • Manipulated arm posture across trial blocks, allowing participants to choose axis mapping.

Main Results:

  • Contrary to prior research, participants could override new proprioceptive inputs.
  • Demonstrated that tactile spatial perception is adaptable to different postural contexts.
  • Highlighted the dynamic interplay between visual and somatosensory information.

Conclusions:

  • The brain's ability to map tactile sensations is more flexible than previously thought.
  • Proprioceptive recalibration can be influenced by task demands and sensory substitution.
  • Findings contribute to understanding sensory integration and spatial cognition.