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Related Concept Videos

Subliminal Perception01:15

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Subliminal perception refers to the processing of sensory information that occurs below the level of conscious awareness. Researchers study subliminal perception by presenting a stimulus, such as a word or image, very quickly, typically around 50 milliseconds. This rapid presentation is often followed by another stimulus, such as a pattern of dots or lines, which blocks further mental processing of the initial stimulus. As a result, if participants cannot identify the initial stimulus better...
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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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Related Experiment Video

Updated: Feb 5, 2026

Testing Tactile Masking between the Forearms
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Tactile Perception for Stroke Induce Changes in Electroencephalography.

Si-Nae Ahn1, Jeong-Weon Lee1, Sujin Hwang2

  • 1Department of Occupational Therapy, Yeoju Institute of Technology, Yeoju-gun, Gyeonggi-do, South Korea.

Hong Kong Journal of Occupational Therapy : HKJOT
|September 7, 2018
PubMed
Summary
This summary is machine-generated.

Active tactile exploration enhances brain activity in stroke survivors more than passive touch. This finding offers neurophysiological evidence supporting active touch as a beneficial rehabilitation strategy for improving occupational performance.

Keywords:
electroencephalographyhemiparesistactile perception

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Area of Science:

  • Neuroscience
  • Rehabilitation Science
  • Biomedical Engineering

Background:

  • Tactile perception is crucial for object evaluation.
  • Chronic hemiparetic stroke impairs sensory-motor functions.
  • Understanding tactile perception's neural basis is vital for stroke rehabilitation.

Purpose of the Study:

  • To investigate the impact of tactile perception on brain activation.
  • To compare brain responses to passive versus active tactile exploration.
  • To examine these effects in individuals with chronic hemiparetic stroke.

Main Methods:

  • Twenty stroke patients (8 right, 12 left brain damaged) participated.
  • Passive and active tactile explorations were performed in a sitting position.
  • Electroencephalography (EEG) measured brain wave activity.

Main Results:

  • Active tactile exploration showed significantly greater sensory motor rhythm power in the right prefrontal and parietal lobes for left-damaged hemispheres.
  • Most brain regions exhibited higher sensory motor rhythm power during active exploration, irrespective of the damaged hemisphere.
  • This suggests enhanced neural engagement with active tactile input.

Conclusions:

  • The study provides neurophysiological evidence for tactile perception in chronic stroke.
  • Active tactile exploration demonstrates potential as an effective rehabilitation modality.
  • Occupational therapists can utilize active touch to enhance occupational performance in stroke patients.