A case of amnestic syndrome due to right thalamic infarction.

Takamatsu, Kazunaga; Yamamoto, Michiya; Yamano, Toshinao; Ohno, Fumitoshi

doi:10.2169/internalmedicine1962.29.301

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…Of the studies mentioning right-sided infarctions reviewed here, this is the only report in which the lesion overlaps with that described in our patient; however, the lesion is larger and encompasses other structures adjacent to the intralaminar region. Takamatsu et al described a woman with a right sided unilateral infarction in the anteromedial region of the thalamus, initially presenting with verbal and non-verbal anterograde memory deficits 43. The initial symptoms cleared however, and the patient showed a residual amnesia for non-verbal material only.…”

Section: Discussionmentioning

confidence: 99%

Neuropsychological correlates of a right unilateral lacunar thalamic infarction

Werf

Weerts

Jolles

et al. 1999

Journal of Neurology, Neurosurgery & Psychiatry

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Objectives-To report on a patient with a lacunar infarction in the right intralaminar nuclei of the thalamus. The role of the thalamic intralaminar nuclei in cognitive function is as yet insuYciently known. The patient described has shown signs of apathy and loss of initiative, in combination with cognitive deficits, which have persisted essentially unaltered up to the present day since an abrupt onset 17 years ago. Methods-High resolution MRI was performed to show the extent of the lesion; a combination of published and experimental neuropsychological techniques was administered to show the nature of the cognitive defects; Single photon emission computed tomography (SPECT) was employed to obtain a measure of cortical perfusion. Results-Brain MRI disclosed an isolated lacunar infarction in the dorsal caudal intralaminar nuclei of the thalamus. Neuropsychological evaluation indicated problems with attention and concentration, executive disturbances, and memory deficits both in the visual and verbal domains. The memory deficits could not be attributed to problems in the early stages of information processing, and are hence regarded as resulting from a failure of retrieval rather than encoding or storage. Brain SPECT disclosed a hypoperfusion of the right frontal cortex. Conclusion-The data indicate that the cognitive profile is the result of a dysfunction of executive functions. This is corroborated by the finding of decreased blood flow in the right frontal cortex, and by evidence from the neuroanatomical literature. Thus the dysexecutive symptoms are thought to be caused by disconnection of the prefrontal cortex from the brainstem activating nuclei through the strategic localisation of the right thalamic infarction. (J Neurol Neurosurg Psychiatry 1999;66:36-42)

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Section: Discussionmentioning

confidence: 99%

Neuropsychological correlates of a right unilateral lacunar thalamic infarction

Werf

Weerts

Jolles

et al. 1999

Journal of Neurology, Neurosurgery & Psychiatry

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Unilateral amnesic stroke. Six new cases and a review of the literature.

Ott

Saver

1993

Stroke

109

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Background and Purpose: Although persistent amnesia due to bilateral limbic system infarction is well described, reports of amnesic syndromes due to unilateral stroke have appeared infrequently and unsystematically. We report six new cases and review previously published reports to expand and consolidate knowledge regarding amnesic stroke.Case Descriptions: Six patients developed acute amnesia associated with unilateral stroke. Brain computed tomography or magnetic resonance imaging revealed lesions in limbic structures, which accounted for the memory deficit. Based on these as well as similar cases in the literature, we delineate three distinct syndromes of unilateral amnesic stroke involving the territories of the posterior cerebral,

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A case of amnestic syndrome due to right thalamic infarction.

Cited by 2 publications

References 10 publications

Neuropsychological correlates of a right unilateral lacunar thalamic infarction

Neuropsychological correlates of a right unilateral lacunar thalamic infarction

Unilateral amnesic stroke. Six new cases and a review of the literature.

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