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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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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:
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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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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Sensory Modalities01:15

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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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Sensory Functions of the Skin01:16

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The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
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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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Related Experiment Video

Updated: Dec 11, 2025

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback
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Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

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Visual motion information modulates tactile roughness perception.

Yosuke Suzuishi1,2, Souta Hidaka3, Scinob Kuroki4

  • 1Department of Psychology, Rikkyo University, 1-2-26, Kitano, Niiza-shi, Saitama, 352-8558, Japan. suzuishi@rikkyo.ac.jp.

Scientific Reports
|August 20, 2020
PubMed
Summary
This summary is machine-generated.

Visual motion, not object texture, can alter tactile roughness perception. Specifically, low-frequency moving visual gratings, when moving opposite to hand motion, made textures feel smoother.

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Area of Science:

  • Neuroscience
  • Sensory Perception
  • Crossmodal Research

Background:

  • Tactile roughness perception is typically assessed through touch.
  • Previous research suggests limited crossmodal interaction between vision and touch for static visual cues.
  • Visual observation of hand movements, not object texture, can influence tactile discrimination.

Purpose of the Study:

  • To investigate if task-irrelevant visual motion, independent of object roughness or bodily cues, affects tactile roughness perception.
  • To determine the role of active hand movement in this visuo-tactile interaction.
  • To explore the influence of visual motion's spatial frequency on tactile perception.

Main Methods:

  • Participants actively moved their hands laterally while touching abrasive papers.
  • They viewed either static or moving sine wave gratings without seeing their hands.
  • Roughness magnitude estimations were recorded for tactile stimuli under different visual conditions.

Main Results:

  • Moving low-spatial-frequency gratings, when presented in the direction opposite to hand movement, led to perceptions of smoother roughness.
  • This effect was not observed with high-spatial-frequency gratings.
  • Visual motion did not influence tactile perception during passive touch.

Conclusions:

  • Task-irrelevant visual motion can modulate tactile roughness perception during active movements.
  • This modulation is specific to the spatial frequency of the visual stimuli.
  • The findings highlight a novel visuo-tactile interaction independent of object properties or direct visual feedback of the body.