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Related Experiment Video

Updated: May 28, 2026

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

Tactile Semiautomatic Passive-Finger Angle Stimulator (TSPAS)

Published on: July 30, 2020

Short-term visual deprivation does not enhance passive tactile spatial acuity.

Michael Wong1, Erik Hackeman, Caitlin Hurd

  • 1McMaster Integrative Neuroscience Discovery and Study, McMaster University, Hamilton, Ontario, Canada.

Plos One
|October 4, 2011
PubMed
Summary

Short-term visual deprivation does not enhance tactile spatial acuity. Tactile performance slightly degraded after brief visual deprivation and did not improve with longer periods, challenging previous findings.

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Last Updated: May 28, 2026

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Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
07:32

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects

Published on: September 1, 2016

Area of Science:

  • Sensory neuroscience
  • Neuroplasticity
  • Human psychophysics

Background:

  • The impact of visual deprivation on tactile perception remains a key question in sensory neuroscience.
  • Previous studies have yielded conflicting results regarding tactile acuity enhancement following visual deprivation.

Purpose of the Study:

  • To investigate whether short-term visual deprivation enhances tactile spatial acuity in normally sighted individuals.
  • To determine the time course over which any potential changes in tactile perception might occur.

Main Methods:

  • Three experiments with 158 participants using a grating orientation task to measure tactile spatial acuity.
  • Automated, controlled assessment of the ability to discern grating orientation on the index finger pad.
  • Staircase and Bayesian adaptive procedures to determine perceptual thresholds.

Main Results:

  • Tactile spatial acuity did not improve with visual deprivation, lasting up to 110 minutes.
  • A slight but significant degradation in tactile performance was observed after brief visual deprivation.
  • Performance improved with repeated testing, and women showed higher tactile acuity than men.

Conclusions:

  • Passive tactile spatial acuity is not enhanced by short-term visual deprivation.
  • Findings suggest limitations on the time course of crossmodal plasticity influencing sensory changes.
  • Recommends against blindfolding sighted participants when comparing tactile acuity with blind individuals.