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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.
Sensory Modalities01:15

Sensory Modalities

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.
General senses refer to the broad category of sensory information detected by receptors in the body and can be further grouped into somatic and visceral senses. Somatic sensations include touch, pressure, temperature, and pain and are essential for navigating our environment and...
Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

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.
Hearing01:31

Hearing

When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
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 9, 2026

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
11:39

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique

Published on: September 7, 2022

Superior spatial touch: improved haptic orientation processing in deaf individuals.

Rick van Dijk1, Astrid M L Kappers, Albert Postma

  • 1School of Sign Language Interpreting, HU University of Applied Sciences, Padualaan 97, 3584 CH, Utrecht, The Netherlands.

Experimental Brain Research
|July 31, 2013
PubMed
Summary
This summary is machine-generated.

Deaf individuals show enhanced haptic spatial orientation skills. This study found deaf signers better identified tactile orientations compared to hearing signers and controls, suggesting benefits from auditory deprivation.

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Area of Science:

  • Neuroscience
  • Psychology
  • Sensory Processing

Background:

  • Haptic perception is crucial for spatial awareness.
  • Auditory deprivation may influence non-auditory sensory processing.
  • Sign language use involves complex spatial cognition.

Purpose of the Study:

  • To investigate haptic spatial orientation in deaf signers versus hearing controls.
  • To explore the impact of auditory deprivation on tactile spatial processing.
  • To understand neurocognitive adaptations in deaf individuals.

Main Methods:

  • Participants (deaf signers, hearing signers, hearing controls) performed a blindfolded haptic spatial orientation task.
  • Task involved setting bars parallel in the horizontal plane after delays (2s, 10s).
  • Performance was measured by accuracy in orientation matching.

Main Results:

  • Deaf signers significantly outperformed hearing signers and hearing controls.
  • No significant difference was found between hearing groups.
  • Deaf individuals demonstrated superior allocentric spatial coordinate identification via touch.

Conclusions:

  • Deaf individuals possess enhanced abilities in haptic spatial orientation.
  • These findings suggest neuroplasticity and compensatory mechanisms due to auditory deprivation.
  • Results inform our understanding of sensory substitution and cross-modal interactions.