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- W2000492706 abstract "The pathophysiology of gait and balance disorders in elderly people with 'higher level gait disorders' (HLGD) is poorly understood. In this study, we aimed to identify the brain networks involved in this disorder. Standardised clinical scores, biomechanical parameters of gait initiation and brain imaging data, including deep white matter lesions (DWML) and brain voxel-based morphometry analyses, were assessed in 20 HLGD patients in comparison to 20 age-matched controls. In comparison to controls, HLGD patients presented a near-normal preparatory phase of gait initiation, but a severe alteration of both locomotor and postural parameters of first-step execution, which was related to 'axial' hypokinetic-rigid signs. HLGD patients showed a significant grey matter reduction in the mesencephalic locomotor region (MLR) and the left primary motor cortex. This midbrain atrophy was related to the severity of clinical and neurophysiologically determined balance deficits. HLGD patients also showed a reduction in speed of gait, related to 'appendicular' hypokinetic-rigid signs and frontal-lobe-like cognitive deficits. These last two symptoms were correlated with the severity of DWML, found in 12/20 HLGD patients. In conclusion, these data suggest that the gait and balance deficits in HLGD mainly result from the lesion or dysfunction of the network linking the primary motor cortex and the MLR, brain regions known to be involved in the control of gait and balance, whereas cognitive and 'appendicular' hypokinetic-rigid signs mainly result from DWML that could be responsible for a dysfunction of the frontal cortico-basal ganglia loops." @default.
- W2000492706 created "2016-06-24" @default.
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- W2000492706 date "2013-11-08" @default.
- W2000492706 modified "2023-10-08" @default.
- W2000492706 title "High-level gait and balance disorders in the elderly: a midbrain disease?" @default.
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- W2000492706 doi "https://doi.org/10.1007/s00415-013-7174-x" @default.
- W2000492706 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3895186" @default.
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