Diffusion magnetic resonance imaging in transient global amnesia
نویسندگان
چکیده
منابع مشابه
Diffusion magnetic resonance imaging in transient global amnesia.
Transient global amnesia (TGA) is a well known clinical entity characterized by anterograde memory disturbance of sudden onset that lasts 1 to 24 hours. Orientation in space and time is impaired while consciousness remains undisturbed . TGA may refer to a single expression of several physiopathological phenomena. Conceptually, cerebral ischemia, epileptic discharge, and migraine constitute the ...
متن کاملTransient global amnesia: hippocampal magnetic resonance imaging abnormalities.
Transient global amnesia (TGA) is an episodic dysfunction of declarative memory that usually resolves within 12 hours and whose underlying pathophysiological mechanisms are still unclear. Recent studies, on the basis of transient focal high-signal abnormalities in the hippocampus on diffusion-weighted imaging (DWI), suggest involvement of memory circuits in the temporo-mesial region. Out of a t...
متن کاملTransient global amnesia: diffusion-weighted imaging lesions and cerebrovascular disease.
BACKGROUND AND PURPOSE A hypoxic-ischemic origin of transient global amnesia (TGA) has been suggested on the basis of the observation of infarctlike diffusion-weighted imaging (DWI) abnormalities in some affected individuals. We tested this hypothesis by comparing vascular risk factors, magnetic resonance imaging (MRI) markers of cerebral small-vessel disease, and other evidence of a cerebrovas...
متن کاملTransient Hyperintensity On Diffusion-Weighted MRI in Transient Global Amnesia
Objects: Different theories were suggested on the etiopathogenesis of transient global amnesia. Methods: We demonstrate a patient with transient global amnesia, in whom, a transient hyperintense signal change on left hippocampus was detected in diffusionand T2weighted magnetic resonance images. Conclusion: The absence of vascular risk factors or atherosclerotic changes in neuroimaging, in addit...
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ژورنال
عنوان ژورنال: Arquivos de Neuro-Psiquiatria
سال: 2009
ISSN: 0004-282X
DOI: 10.1590/s0004-282x2009000100035