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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.
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Related Experiment Video

Updated: Apr 19, 2026

Functional MRI in Conjunction with a Novel MRI-compatible Hand-induced Robotic Device to Evaluate Rehabilitation of Individuals Recovering from Hand Grip Deficits
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An MRI-compatible hand sensory vibrotactile system.

Fa Wang1, Kishor Lakshminarayanan, Gregory P Slota

  • 1Department of Electrical and Computer Engineering, University of Wisconsin-Madison, 1550 Engineering Drive, Madison WI 53706, USA.

Physiological Measurement
|December 16, 2014
PubMed
Summary

Vibrotactile noise applied to the wrist can improve fingertip touch perception. A new MRI-compatible system allows study of the brain

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Sensory Augmentation

Background:

  • Vibrotactile noise applied to the wrist enhances fingertip tactile sensation.
  • The underlying central nervous system mechanisms, particularly in the human brain, remain poorly understood.
  • This knowledge gap limits the development of assistive devices for sensory deficits.

Purpose of the Study:

  • To investigate the impact of vibrotactile noise on sensorimotor brain activity in humans.
  • To develop a magnetic resonance imaging (MRI)-compatible system for delivering vibrotactile noise during brain imaging.
  • To enable detailed neurologic investigation of sensory enhancement.

Main Methods:

  • Development of a portable, MRI-compatible vibrotactile system.
  • The system uses a remote amplifier to drive a piezoelectric vibrator inside the MR room.
  • The system was tested for MRI compatibility and its effect on tactile sensation.

Main Results:

  • The developed vibrotactile system is portable and MRI-compatible.
  • The system successfully delivered vibrotactile noise during MRI brain scans.
  • The system induced an improvement in fingertip tactile sensation, consistent with prior research.

Conclusions:

  • The developed MRI-compatible vibrotactile system facilitates the investigation of brain activity related to sensory enhancement.
  • This technology supports further research into the neurophysiological mechanisms of vibrotactile augmentation.
  • The findings pave the way for improved assistive devices for individuals with sensory deficits.