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SYNOPSIS A prominent feature in dementia is intellectual deterioration. Review of the clinical literature indicates a lack of suitably quantitated studies of specific intellectual defects in dementia. The present study investigated the performance of patients with multi-infarct dementia (MID), dementia due to Alzheimer's disease (AD), and vertebrobasilar insufficiency (VBI) with dementia using the Wechsler Adult Intelligence Scale (WAIS). Forty-two patients ranging in age from 45 to 85 years (x 66) were included. Significant differences in cognitive and intellectual performance were found between patients with dementia due to VBI and MID versus neuronal atrophy of the Alzheimer's type. The group with AD performed significantly and consistently lower on all measures. There were no significant differences between the two cerebrovascular disease groups, even though the MID group performed consistently more poorly than the VBI group. A discriminant function analysis classified 74%0 of the patients correctly based on the individual WAIS scores. The diagnosis was more easily made when tasks measuring visual motor coordination and abstract reasoning were included in the analysis.Dementia is a syndrome of behavioural and cognitive reduction caused by diffuse cerebral dysfunction. C. M. Fisher (1968) defines dementia as a chronic reduction in any or all of the higher verbal and non-verbal cerebral functions. According to Hachinski et al. (1974), the first step in the investigation of a demented patient is to document the nature and extent of the organic intellectual deterioration. We believe this is best achieved by a battery of neuropsychological tests which quantitate the deficit in higher cortical functions.Most authors agree that a prominent feature in dementia is intellectual deterioration or reduction in the intelligence quotient (IQ). However, review of the clinical literature indicates a lack of

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Normal posterior fossa anatomy can be adequately shown on ultrafast MR images, which can be helpful when prenatal sonography is equivocal.

To determine what practices are being utilized in the management of intussusception, a survey was sent to chairpersons of 64 Pediatric Radiology departments in the United States and Canada. There was a 92% response rate. Barium is used in 97% of departments and is the most commonly used contrast-agent in 64%. Water-soluble contrast is used in 83% of departments and air in 50%. In high-risk patients, water soluble contrast is used in 71% of departments, air in 28% and barium in 24%. Glucagon, pre-exam antibiotics, and pre-exam sedation are not used regularly in a majority of departments. The radiologic management of intussusception is more varied than only a few years ago. Use of water-soluble contrast and air have increased, while barium use is less routine.