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• W2032123529 abstract "Objective. We studied the surgical results and indications of spinal cord stimulation and thalamic surgery for the purpose of treating central post-stroke pain (CPSP). Subjects and Methods. CPSP due to unilateral cerebrovascular disease (CVD) lesion was studied in 17 subjects. Pain was localized on the limb (localized type CPSP) in 7 cases and distributed on the hemibody (diffuse type CPSP) in the other 10 cases. All cases of localized type CPSP were treated by epidural spinal cord stimulation. For cases with diffuse type CPSP, stereotactic Vim-Vcpc thalamotomy was performed in 6 cases and thalamic Vim-Vcpc stimulation in 4 cases using depth micro-recording. Evoked pain was dominant in the former and continuous, sometimes intermittent, pain was dominant in the latter. Prior to the operation, we studied somatosensory evoked potentials (SEP) in all cases of localized type CPSP and in 6 cases with diffuse type CPSP treated by thalamotomy. In cases involving thalamic surgery, electrophysiological data obtained during surgery included background neural activity (BNA), sensory response (SR) and burst discharge (burst), and responses to micro-stimulation in the thalamic sensory nucleus. Results. In 7 cases with localized type CPSP treated by spinal cord stimulation, sufficient pain relief was achieved in 4 cases, moderate in 2 cases and fair in one case. In 10 cases with diffuse type CPSP, good was achieved in 3, moderate in one, fair in 2 out of 6 cases treated by thalamotomy, and good in 2 and moderate in 2 out of 4 cases treated by thalamic stimulation. With the exception of one “fair respondent to spinal cord stimulation, we recognized definite SEP originating in the sensory cortex (N20). However, SEPs were flat in 4 cases and the amplitude of N20 markedly decreased in the other 2 cases treated by thalamotomy. Using results taken from the electrophysiological study during thalamic surgery, these patients could be classified into 3 groups. In group A (3 cases), we found SR frequently and rarely encountered bursts in a wide area of the thalamic sensory nucleus. In group B (5 cases), we encountered marked burst discharges with high amplitude and of various duration. These were recogn-ized around decreased or voided areas of thalamic neural activity. In 2 cases, which were classified as group C, we found a decrease of BNA, few bursts and no SR in the sensory thalamus. We found response to micro-stimulation in all groups. Pain control was achieved by thalamic surgery in both group A and B. Conclusions. Spinal cord stimulation proved to be an effective treatment for localized type CPSP in those cases in which the lemniscal system was preserved. In cases with diffuse type CPSP, we found both dysfunction of the lemniscal system and functional change of the spino-thalamic system. We were able to ameliorate this intractable pain by stereotactic Vim-Vcpc thalamic surgery in those cases in which the spino-thalamic system had been preserved or was hyperactive." @default.
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• W2032123529 date "2011-01-01" @default.
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• W2032123529 title "<b>Spinal cord stimulation and thalamic surgery for the treatment of central post-stroke pain </b>" @default.
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• W2032123529 doi "https://doi.org/10.11154/pain.26.145" @default.
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