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Related Concept Videos

Tactile and Chemical Senses01:27

Tactile and Chemical Senses

289
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.
289

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Updated: Jun 28, 2025

Tactile Semiautomatic Passive-Finger Angle Stimulator TSPAS
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Tactile shape discrimination for moving stimuli.

Nicolas Pélegrin1, Mahiko Konishi2, Jean-Christophe Sarrazin3

  • 1ONERA, Information Processing and Systems Department, Cognitive Engineering and Applied Neurosciences Research Unit, Salon-de-Provence, 13661, France. nico_pelegrin@orange.fr.

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Summary
This summary is machine-generated.

Tactile perception of moving objects is influenced by biological motion laws. Ambiguous tactile patterns impair shape recognition and reduce confidence, highlighting predictive processing in touch.

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Area of Science:

  • Neuroscience
  • Psychology
  • Haptics

Background:

  • Previous research links visual perception and human movement.
  • Exploration of imputed motion mechanisms within the tactile modality is limited.
  • Biological coherence in space-time influences human movement perception.

Purpose of the Study:

  • To investigate spatial-temporal dependencies in tactile perception.
  • To determine if tactile perception of moving objects is influenced by biological motion laws.
  • To examine the impact of stimulus ambiguity on tactile shape recognition and confidence.

Main Methods:

  • Participants received tactile stimulation on their palm with patterns congruent or incongruent with the two-thirds power law.
  • Participants reported perceived shape and confidence.
  • Hierarchical Drift Diffusion Model (HDDM) analyzed evidence accumulation.

Main Results:

  • Ambiguous tactile patterns significantly diminished tactile discrimination performance.
  • Stimulus ambiguity reduced participants' response confidence.
  • HDDM analysis revealed sensitivity of evidence accumulation to informational ambiguity.

Conclusions:

  • Motor features of shape recognition observed in vision are also present in tactile modality.
  • Tactile perception involves predictive dynamics for uncertainty reduction.
  • Understanding tactile perception requires considering biological motion and predictive processing.