[Left antero-medial thalamic infarction and symptoms of amnesia, aphasia, and dementia].
Three cases of left antero-medial thalamic infarction who showed amnesia, aphasia and dementia were studied comparatively in terms of clinical features and the MRI findings. Case 1 and Case 2, who showed transient amnesia and aphasia respectively, had a single lesion in the left antero-medial thalamus. Case 1 had a lesion in a more ventral part than Case 2, suggesting that Case 1 had a lesion of the bundles into the anterior and dorsomedial thalamic nuclei while Case 2 had a lesion of the ventrolateral thalamic nucleus. On the other hand, Case 3 who showed persistent dementia had multiple lesions in addition to the left antero-medial thalamic infarction. A review of the previous reports and investigations of the present cases suggest that a single ischemic lesion in the left antero-medial thalamus will cause amnesia and/or aphasic symptom while in cases with other multiple lesions it may cause persistent dementia.
Ino
T
T
Akiguchi
I
I
Nabatame
H
H
Kameyama
M
M
D000368:Aged; D000647:Amnesia / Q000209:etiology*; D001037:Aphasia / Q000209:etiology*; D002544:Cerebral Infarction / Q000150:complications / Q000175:diagnosis*; D003704:Dementia / Q000209:etiology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D013788:Thalamus / Q000098:blood supply*