Spatial skills as a window into Alzheimer’s risk in Down syndrome
A study of 376 adults with Down syndrome (DS) has identified distinct patterns in how two types of spatial abilities—visuomotor integration and visuospatial construction—decline with age and Alzheimer’s disease (AD) progression. While both abilities worsened as AD advanced, visuomotor integration showed a clear age-related decline in DS, whereas visuospatial construction did not. Notably, the Block Design test, a measure of visuospatial construction, was the most effective single task for distinguishing cognitively stable individuals from those with full AD, though neither ability alone was sufficient for diagnosing the intermediate stages of mild cognitive impairment.
Why it might matter to you:
This research refines the search for early cognitive biomarkers in a high-risk neurodevelopmental population. For a researcher in neurodevelopmental disorders, it highlights the importance of task-specific cognitive profiling, suggesting that certain visuospatial measures may be more sensitive than others for tracking neurodegeneration. This could inform the design of more precise longitudinal studies and clinical monitoring tools for populations with a genetic predisposition to dementia.
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