Objective To detect for hippocampal sclerosis presurgically in a group of patients with refractory temporal lobe epilepsy Methods Eighty four consecutive patients with refractory temporal lobe epilepsy were subjec...Objective To detect for hippocampal sclerosis presurgically in a group of patients with refractory temporal lobe epilepsy Methods Eighty four consecutive patients with refractory temporal lobe epilepsy were subjected to brain MRI of hippocampal volumetry A ratio of smaller to larger hippocampal volume was determined and unilateral hippocampal atrophy (HA) was diagnosed if the ratio is less than 0 91 Results Unilateral HA was diagnosed in 42 patients (50%) and bilateral HA in 1 patient Other MRI abnormalities were detected in 18 patients with or without coexisting HA Conclusions Hippocampal sclerosis can be detected presurgically in many patients by brain MRI Additional abnormalities not detected by brain CT can also be demonstrated展开更多
The cerebellum plays a key role in movement control and in cognition and cerebellar involvement is described in several neurodegenerative diseases.While conventional magnetic resonance imaging(MRI) is widely used for ...The cerebellum plays a key role in movement control and in cognition and cerebellar involvement is described in several neurodegenerative diseases.While conventional magnetic resonance imaging(MRI) is widely used for brain and cerebellar morphologic evaluation,advanced MRI techniques allow the investigation of cerebellar microstructural and functional characteristics.Volumetry,voxel-based morphometry,diffusion MRI based fiber tractography,resting state and task related functional MRI,perfusion,and proton MR spectroscopy are among the most common techniques applied to the study of cerebellum.In the present review,after providing a brief description of each technique's advantages and limitations,we focus on their application to the study of cerebellar injury in major neurodegenerative diseases,such as multiple sclerosis,Parkinson's and Alzheimer's disease and hereditary ataxia.A brief introduction to the pathological substrate of cerebellar involvement is provided for each disease,followed by the review of MRI studies exploring structural and functional cerebellar abnormalities and by a discussion of the clinical relevance of MRI measures of cerebellar damage in terms of both clinical status and cognitive performance.展开更多
文摘Objective To detect for hippocampal sclerosis presurgically in a group of patients with refractory temporal lobe epilepsy Methods Eighty four consecutive patients with refractory temporal lobe epilepsy were subjected to brain MRI of hippocampal volumetry A ratio of smaller to larger hippocampal volume was determined and unilateral hippocampal atrophy (HA) was diagnosed if the ratio is less than 0 91 Results Unilateral HA was diagnosed in 42 patients (50%) and bilateral HA in 1 patient Other MRI abnormalities were detected in 18 patients with or without coexisting HA Conclusions Hippocampal sclerosis can be detected presurgically in many patients by brain MRI Additional abnormalities not detected by brain CT can also be demonstrated
文摘The cerebellum plays a key role in movement control and in cognition and cerebellar involvement is described in several neurodegenerative diseases.While conventional magnetic resonance imaging(MRI) is widely used for brain and cerebellar morphologic evaluation,advanced MRI techniques allow the investigation of cerebellar microstructural and functional characteristics.Volumetry,voxel-based morphometry,diffusion MRI based fiber tractography,resting state and task related functional MRI,perfusion,and proton MR spectroscopy are among the most common techniques applied to the study of cerebellum.In the present review,after providing a brief description of each technique's advantages and limitations,we focus on their application to the study of cerebellar injury in major neurodegenerative diseases,such as multiple sclerosis,Parkinson's and Alzheimer's disease and hereditary ataxia.A brief introduction to the pathological substrate of cerebellar involvement is provided for each disease,followed by the review of MRI studies exploring structural and functional cerebellar abnormalities and by a discussion of the clinical relevance of MRI measures of cerebellar damage in terms of both clinical status and cognitive performance.
