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Updated: May 20, 2026

Back Mechanical Sensitivity Assessment in the Rat for Mechanistic Investigation of Chronic Back Pain
05:10

Back Mechanical Sensitivity Assessment in the Rat for Mechanistic Investigation of Chronic Back Pain

Published on: August 30, 2022

Neglect-like tactile dysfunction in chronic back pain.

G Lorimer Moseley1, Laura Gallagher, Alberto Gallace

  • 1The Sansom Institute of Health Research, The University of South Australia, Adelaide, Australia. lorimer.moseley@gmail.com

Neurology
|June 30, 2012
PubMed
Summary
This summary is machine-generated.

Chronic back pain disrupts tactile processing, affecting how the brain maps touch sensations on the body. This study found spatial tactile processing is impaired in individuals with chronic low back pain.

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Acute and Chronic Tactile Sensory Testing after Spinal Cord Injury in Rats
08:57

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Published on: April 4, 2012

Area of Science:

  • Neuroscience
  • Pain Research
  • Somatosensory Processing

Background:

  • Tactile dysfunction in chronic pain is linked to disruptions in somatotopic processing.
  • Chronic pain conditions may alter the brain's spatial representation of sensory input.

Purpose of the Study:

  • To investigate if individuals with chronic back pain exhibit spatially defined disruptions in tactile processing.
  • To test the hypothesis that tactile perception is altered in a somatotopic manner in chronic low back pain.

Main Methods:

  • Three cross-sectional experiments involved 26 patients with unilateral low back pain and 12 healthy controls.
  • Participants performed temporal order judgments of paired tactile stimuli delivered to the back and index fingers.
  • Perceived simultaneity was assessed by analyzing stimulus onset asynchrony (PSS).

Main Results:

  • Patients with chronic low back pain showed significantly altered PSS values compared to healthy controls.
  • A delay in perceiving simultaneous stimuli was observed when stimuli were applied to the affected side of the back.
  • Tactile processing disruptions were also noted for stimuli applied to the hands in proximity to the affected back area.

Conclusions:

  • Chronic unilateral low back pain is associated with a disruption in the spatial representation of vibrotactile stimuli.
  • These findings suggest that chronic pain impacts the somatosensory cortex's ability to accurately map tactile information.