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Correlation between somatosensory function and cortical activation induced by touch stimulation in patients with

Sung Ho Jang1, Mi Young Lee

  • 1Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, Taegu, Republic of Korea.

The International Journal of Neuroscience
|December 12, 2012
PubMed

Insights

Somatosensory function in intracerebral hemorrhage (ICH) patients correlates with brain activation in key sensory areas. This finding highlights the relationship between tactile sensation deficits and cortical responses in the primary sensory-motor cortex and posterior parietal cortex.

Area of Science:

  • Neuroscience
  • Neurology
  • Medical Imaging

Background:

  • Intracerebral hemorrhage (ICH) often leads to somatosensory deficits.
  • Understanding the neural correlates of these deficits is crucial for rehabilitation.

Purpose of the Study:

  • To investigate the correlation between somatosensory function and cortical activation in ICH patients using functional magnetic resonance imaging (fMRI).

Main Methods:

  • Thirty-two chronic ICH patients with tactile sensation deficits were assessed using the Nottingham Sensory Assessment (NSA).
  • fMRI was employed with tactile stimulation applied to the affected hand.
  • Regions of interest included the primary sensory-motor cortex (SM1), posterior parietal cortex (PPC), and secondary somatosensory cortex (S2).

Main Results:

  • Significant positive correlations were observed between NSA scores and fMRI signal changes in the contralateral SM1 and PPC.
  • A correlation was also found in the ipsilateral SM1.
  • No significant correlations were detected in the secondary somatosensory cortex (S2) in either hemisphere.

Conclusions:

  • Somatosensory function in ICH patients is positively associated with cortical activation in the contralateral SM1 and PPC, as well as the ipsilateral SM1.
  • The secondary somatosensory cortex (S2) did not show a significant correlation with somatosensory function in this cohort.
Abstract

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