Vessel constriction followed by dilatation is a postulated mechanism for migraine, although there is no definitive evidence for this.2 Aside from these two conditions, reversible constriction of arteries is not a recognized cause of cerebrovascular disease.We describe the clinical and angiographic syndrome of four patients with reversible constriction of the cerebral vasculature. We also review some of the relevant literature and discuss the nosology of this only recently recognized condition. Case Reports Case IA 48-year-old woman was admitted to the hospital because of a severe headache that was associated with a sense of spinning, nausea, vomiting, and blurred vision. Headaches were unusual for her, and there was no personal or family history of migraine.Initially, her blood pressure was 200/100 mm Hg, but it quickly fell to the 120/65 mm Hg range without

We describe five patients with spontaneous, persistent confabulation. While the basis of confabulation in general is not known, the evidence in this specific group of patients with spectacular, impulsive, and spontaneous confabulation suggests a marked deficit in frontal function, superimposed upon a basic defect in memory, as a possible mechanism.

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This study was undertaken in order to examine the relationship between CT scan hemispheric asymmetries and recovery in aphasia. The study had two parts. In Part I, hemispheric asymmetries were measured on the CT scans of 60 right-handed male non-aphasic (non-neurological) controls and 89 right-handed male aphasics, using a modification of LeMay's (1977) techniques. Both the non-aphasic control and aphasic data were in agreement with that of LeMay for frontal width, occipital width and occipital length. In Part II, the degree of CT scan hemispheric asymmetry was quantified for 14 right-handed male global aphasics, in whom differences in degree of language recovery were observed in the months following stroke. Atypical occipital asymmetries were significantly associated with certain aspects of language recovery (naming, single-word comprehension and single-word repetition). The authors postulate that increased capacity for right hemisphere contribution to language function might in part explain recovery in the cases exhibiting atypical occipital CT asymmetries.