Performance on tests of memory in 39 patients who met Center for Disease Control (CDC) criteria for chronic fatigue immune dysfunction syndrome (CFIDS) was compared with 23 depressed patients (DSM-III-R) and 129 healthy controls. Although the CFIDS patients had normal neuropsychological profiles, they significantly overestimated their ability (metamemory), performed significantly worse on tests of recall as context increased (e.g., recognition), made more errors when rehearsal was prevented, and had delayed mental scanning as memory load increased. The overall pattern indicated that CFIDS patients had a significant memory deficit, far worse than implied by CDC criteria. The pattern for CFIDS patients was consistent with temporal-limbic dysfunction and significantly different than depressed patients and control subjects.
Alzheimer's disease is clinically characterized by a variety of progressive cognitive deficits, most notably an impaired ability to acquire new information, such as name recall. Eleven demented patients and 11 controls participated in a 4 week memory program that included training in name-face recall. Individuals were taught strategies for name-face rehearsal, and administered task specific and standardized tests to assess the intervention efficacy. During the memory training patients improved recall of names and faces (p < 0.05), while controls remained stable. Patients also improved on the weekly standardized measures, including the Kendrick Digit Copy and Geriatric Depression Scale (p < 0.05). Thus, the memory training can be beneficial for improving name recall and some aspects of behavior. This can provide a framework for development of programs to enhance cognitive function in patients with dementia and may tap biological mechanisms that promote neural plasticity to compensate for the degenerative condition.
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