• Clin J Pain · May 2007

    Case Reports

    Laser-evoked potentials correlate with clinical evolution in a case of spontaneous and recurrent complex regional pain syndrome type I.

    • Valérie Moreau, Anne D Berquin, and Leon Plaghki.
    • Cliniques universitaires Saint-Luc, Service de Médecine Physique et Réadaptation, Brussels, Belgium.
    • Clin J Pain. 2007 May 1; 23 (4): 375-9.

    AbstractWe describe a case of spontaneous complex regional pain syndrome developing first in the left arm and 2 years later in the right foot of a 14-year-old girl. Physical examination showed abnormalities in tactile and thermal sensitivity. Laser-evoked potentials (LEPs) after stimulation of the affected right foot were absent in the acute phase and then progressively recovered over a period of 5 months, in correlation with clinical changes. To our knowledge, no systematic analysis of LEPs in complex regional pain syndrome has been published. We suggest that the observed electrophysiologic alterations could result from a temporary dysfunction of attentional systems, which are assumed to contribute greatly to the LEPs vertex complex. Further studies are needed to test this hypothesis.

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