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Cortical metabolism in posterolateral thalamic stroke: PET study
Author(s) -
Chabriat H.,
Pappata S.,
Levasseur M.,
Fiorelli M.,
Dinh S. Tran,
Baron J. C.
Publication year - 1992
Publication title -
acta neurologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.967
H-Index - 95
eISSN - 1600-0404
pISSN - 0001-6314
DOI - 10.1111/j.1600-0404.1992.tb05087.x
Subject(s) - thalamus , stroke (engine) , medicine , cortex (anatomy) , hemiparesis , positron emission tomography , infarction , cortical spreading depression , neuroscience , cardiology , psychology , angiography , myocardial infarction , mechanical engineering , migraine , engineering
In 8 patients with small unilateral posterolateral thalamic (or, in one case, thalamocapsular) stroke (infarction or hemorrhage) selected on strict clinical (pure hemisomatosensory deficit without hemiparesis, visual field defect or neuropsychological impairment) and MRI criteria, we studied cortical energy metabolism using positron emission tomography with the 18 F‐fluorodeoxyglucose or the 15 O‐oxygen method. We found no significant ipsi‐ or contra‐lateral metabolic depression either in the whole cortical mantle or in the sensorimotor cortex. These results support the hypothesis that location of thalamic stroke is a major determinant of the ipsilateral cortical hypometabolism characteristic of cognitively impaired patients with thalamic lesions and further emphasize the influence of the “non‐specific” thalamocortical system on resting cortical metabolism. The lack of sensorimotor cortex hypometabolism in our patients suffering from hemidysesthesia and/or ‐hyperpathia also suggests that cortical metabolism is unaltered in thalamic pain.