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Related Concept Videos

Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

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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:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the...
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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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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
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Parallel Processing01:20

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The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
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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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Sensation typically is the process by which the sensory receptors and sense organs detect stimuli from the internal and external environment and transmit this information to the central nervous system for processing.
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Related Experiment Video

Updated: Jan 14, 2026

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback
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Look first, feel faster: Prior visual information accelerates haptic material exploration.

Michaela Jeschke1, Knut Drewing1

  • 1Experimental Psychology, HapLab, Justus-Liebig University Giessen, Giessen, Germany.

I-Perception
|October 20, 2025
PubMed
Summary
This summary is machine-generated.

Visual information helps people select the right touch methods (exploratory procedures or EPs) faster. This improves the efficiency of exploring materials by planning movements in advance.

Keywords:
haptic explorationmaterial perceptionmovement planningvirtual realityvision

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Area of Science:

  • Haptics and Human Perception
  • Robotics and Artificial Intelligence
  • Cognitive Neuroscience

Background:

  • Humans employ specialized exploratory procedures (EPs) for material exploration, tailored to material properties like deformability or texture.
  • Abstract visual information can influence motor control, guiding parameters like exploration direction.

Purpose of the Study:

  • To investigate how visual priors influence the selection of material-specific EPs in active touch.
  • To assess the impact of visual information on the efficiency of haptic exploration.

Main Methods:

  • Utilized real-life materials within a naturalistic visual virtual reality (VR) environment.
  • Compared EP selection and exploration times with and without prior visual information about the material.

Main Results:

  • Humans demonstrated improved selection of specialized EPs when provided with valid visual prior information.
  • Access to visual priors led to earlier and more probable use of specialized EPs.
  • Exploration time was reduced when visual priors were available, indicating increased efficiency.

Conclusions:

  • Visual prior information enhances the efficiency of haptic exploration by enabling anticipatory planning of movement schemes.
  • This finding has implications for designing more intuitive human-robot interaction and virtual reality experiences.