J Korean Neurol Assoc.  2008 Aug;26(3):250-253.

Transient Global Amnesia With Unilateral Hippocampal Lesions and Contralateral Temporal Spikes

Affiliations
  • 1Department of Neurology College of Medicine Seoul National University, Seoul National University Bundang Hospital, Seongnam, Korea. nrpsh@snu.ac.kr
  • 2Department of Neurology College of Medicine Soonchunhyang University, Seoul, Korea.

Abstract

Recently, various diagnostic modalities revealed the characteristic abnormalities in transient global amnesia (TGA). We described two TGA patients with focal lesions in the right hippocampus. One patient showed bilateral temporal spike-and-wave on EEG and contralateral temporal hyperperfusion on SPECT. The other exhibited contralateral temporal sharp waves and ipsilateral temporal hypoperfusion. Our patients suggest that bilateral dysfunction of the medial temporal lobe is important for developing TGA. Multimodal diagnostic approach is required to clarify this phenomenon.

Keyword

Transient global amnesia; EEG; MRI

MeSH Terms

Amnesia, Transient Global
Electroencephalography
Hippocampus
Humans
Temporal Lobe
Tomography, Emission-Computed, Single-Photon
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