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Related Concept Videos

Somatosensation01:33

Somatosensation

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.
Visual Agnosia01:12

Visual Agnosia

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 end"...
Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

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 stimulus...

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Related Experiment Video

Updated: May 23, 2026

Tactile Semiautomatic Passive-Finger Angle Stimulator (TSPAS)
04:40

Tactile Semiautomatic Passive-Finger Angle Stimulator (TSPAS)

Published on: July 30, 2020

Early visual experience influences haptic cross-sectioning ability.

Monica Gori1,2, Margherita Di Gaudio1,3, Diego Torazza4

  • 1Unit of Visually Impaired People, Istituto Italiano di Tecnologia, Genoa, Italy.

Psychological Research
|May 22, 2026
PubMed
Summary
This summary is machine-generated.

Early blindness significantly impairs the ability to mentally visualize 3D shapes through touch. This research highlights the critical role of early vision in developing spatial reasoning skills, crucial for tactile-based tasks.

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Related Experiment Videos

Last Updated: May 23, 2026

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04:40

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Published on: July 30, 2020

Visualizing the Effects of a Positive Early Experience, Tactile Stimulation, on Dendritic Morphology and Synaptic Connectivity with Golgi-Cox Staining
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Visualizing the Effects of a Positive Early Experience, Tactile Stimulation, on Dendritic Morphology and Synaptic Connectivity with Golgi-Cox Staining

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Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback
05:43

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

Published on: May 23, 2019

Area of Science:

  • Cognitive Neuroscience
  • Developmental Psychology
  • Sensory Neuroscience

Background:

  • Cross-sectioning 3D solids requires advanced spatial reasoning and mental manipulation of 2D and 3D objects.
  • The impact of visual impairments on cross-sectioning abilities remains largely unexplored.
  • Understanding spatial feature perception is vital, yet its connection to vision deficits is unclear.

Purpose of the Study:

  • To investigate how early-life vision influences spatial representation construction and transformation via touch.
  • To assess the impact of blindness onset on haptic cross-sectioning performance.

Main Methods:

  • Utilized a haptic version of the Santa Barbara Solid Test with 3D-printed solids.
  • Compared performance across four groups: early blind, late blind, low vision, and blindfolded sighted participants.
  • Analyzed accuracy in identifying cross-sections using a generalized linear mixed model.

Main Results:

  • The onset of blindness was the sole significant predictor of cross-sectioning performance (p < 0.001).
  • Early blind individuals demonstrated a lower probability of correctly identifying solid cross-sections compared to other groups (p ≤ 0.02).

Conclusions:

  • Early visual deprivation negatively affects the development of haptic spatial skills.
  • Findings underscore the need for specialized rehabilitation programs for multisensory spatial reasoning in visually impaired individuals.