[Disorders of motor functions after removal of parasagittal meningiomas].

Specific features of motor activity disorders were studied in 87 patients before and after removal of a parasagittal meningioma. Motor disorders are most severe in localization of the tumor in the region of the middle third of the superior sagittal sinus and falx and less severe when the tumor is found in the posterior parts of the anterior third of the superior sagittal sinus. The disorders are more marked after operation with extensive resection of areas of the superior sagittal sinus involves in the tumor and with occlusion of the formed venous drainage passages. The motor disorders are particularly severe after removal of parasagittal meningiomas and are often bilateral with multiple components (including disturbances in the pyramidal and extrapyramidal systems, afferent regulation of movements, and coordinated work of both hemispheres in the formation of motor acts). Not only the direct effect of the pathological focus on the cerebral motor zones situated at different levels but disorders of cerebral and peripheral circulation are of importance in the pathogenesis of these disturbances.