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Central pain in a hemispherectomized patient

journal contribution
posted on 2001-01-01, 00:00 authored by H Olausson, S Marchand, R G Bittar, J Bernier, A Ptito, M C Bushnell
We have examined a hemispherectomized patient who complained of touch-evoked pricking and burning pain in her paretic hand, especially when the hand was cold. Psychophysical examination showed that for the paretic side she confused cool and warm temperatures, and confirmed that she had a robust allodynia to brush stroking that was enhanced at a cold ambient temperature. Functional magnetic resonance imaging (fMRI) showed that during brush-evoked allodynia, brain structures implicated in normal pain processing (viz. posterior part of the anterior cingulate cortex, secondary somatosensory cortex, and prefrontal cortices) were activated. The fMRI findings thus indicate that the central pain in this patient was served by brain structures implicated in normal pain processing. Possible pathophysiological mechanisms include plasticity as well as thalamic disinhibition. © 2001 European Federation of Chapters of the International Association for the study of pain.

History

Journal

European Journal of Pain

Volume

5

Issue

2

Pagination

209 - 217

ISSN

1090-3801

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