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Updated: May 22, 2026

Brain Infarct Segmentation and Registration on MRI or CT for Lesion-symptom Mapping
Published on: September 25, 2019
[Acute amnestic syndrome: left thalamo-polar infarct]
1Service de neurologie, Département de médecine, Hôpital du Valais Sion, Avenue Grand-Champsec 80, 1950 Sion. joseph.ghika@hopitalvs.ch
Abstract:
An 80-year old American patient was found wandering in a mountain village of Switzerland, with an anterograde, prospective, retrograde, dyschronologic amnesic syndrome without confabulation, paramnesia or false recognitions, disoriented, slightly confused, with no focal sensory, motor, ataxic or visual field deficit, with a mild dysexecutive syndrome. The MR imaging showed an acute thalamo-polar artery infarct. A dysconnection of the mamillo-othalamic and thalamo-temporal pathways is felt at the origin of the amnesic syndrome. A brief review of the other presentation of this chamelon syndrome is presented, together the main etiologies at its origin.
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