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Related Experiment Videos

Sympathetic skin response in hemispheric lesions.

A Uncini1, A Di Muzio, A Lugaresi

  • 1Institute of Clinical Neurology and Behavioral Sciences, University of Chieti, Italy.

Neurophysiologie Clinique = Clinical Neurophysiology
|December 1, 1992
PubMed
Summary

Sympathetic skin response (SSR) testing in cerebrovascular accident (CVA) patients revealed absent SSR in some hemiplegics, suggesting central pathway involvement or suppressed suprasegmental influences. This finding aids in understanding neurological deficits post-stroke.

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Area of Science:

  • Neurology
  • Neurophysiology

Background:

  • Cerebrovascular accident (CVA) can lead to significant neurological deficits.
  • Understanding the functional integrity of autonomic pathways is crucial for assessing stroke severity and prognosis.

Purpose of the Study:

  • To investigate the utility of sympathetic skin response (SSR) in evaluating autonomic dysfunction following cerebrovascular accident (CVA).
  • To correlate SSR findings with lesion location and somatosensory evoked potentials (SEPs) in CVA patients.

Main Methods:

  • Sympathetic skin response (SSR) was recorded following electrical nerve stimulation in 16 CVA patients.
  • Computerized tomography (CT) documented lesion location and nature.
  • Median somatosensory evoked potentials (SEPs) were recorded.

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Main Results:

  • Eight hemiplegic patients showed absent bilateral SSR after stimulation of the plegic side, with absent parietal and pre-rolandic SEPs in affected hemispheres.
  • The remaining CVA cases exhibited bilateral SSR with reduced amplitude SEPs.
  • SSR was present bilaterally when stimulating the normal side in early post-CVA weeks.

Conclusions:

  • Absence of electrically evoked SSR in hemispheric lesions may indicate involvement of central afferent pathways.
  • Temporary suppression of suprasegmental excitatory influences could also explain absent SSR.
  • SSR and SEP assessments provide valuable insights into neurophysiological changes after CVA.