Effects of aging and dementia upon recent visuospatial memory

Area of Science:

• Neuroscience
• Cognitive Psychology
• Gerontology

Background:

• Cognitive decline is a significant concern in aging and dementia.
• Developing sensitive and specific tests for cognitive impairment is crucial.

Purpose of the Study:

• To assess visuospatial recall and reaction time in young normal, elderly normal, and elderly demented subjects.
• To evaluate a computerized delayed visuospatial recall task for sensitivity to cognitive decline.

Main Methods:

• Administered a computerized delayed visuospatial recall task and a choice reaction time task.
• Included 20 young normals, 29 elderly normals, and 76 elderly demented subjects.
• Varied delay intervals (0-120s) and stimulus load.

Main Results:

• Recall accuracy declined with increasing delay intervals across all groups, most significantly in severely demented subjects.
• Severely demented subjects showed deficits in immediate recall.
• Increased stimulus number disproportionately affected elderly and demented groups.
• Choice reaction time was sensitive to age and dementia severity.

Conclusions:

• The computerized visuospatial recall task is sensitive to age-related cognitive decline and dementia.
• Delayed spatial recall and reaction time correlate with global cognitive status and verbal recall.
• The task shows potential for differentiating cognitive function across age and dementia groups.