Neurological changes and emotional functioning in adults with Down Syndrome

Area of Science:

• Neurology
• Psychiatry
• Genetics

Background:

• Down syndrome (DS) is associated with an increased risk of early-onset Alzheimer's disease (AD).
• Understanding the psychological and neurological changes in DS during AD progression is crucial for early detection and intervention.

Purpose of the Study:

• To investigate emotional changes over time in adults with DS.
• To determine if these psychological changes correlate with MRI-detected brain atrophy and neurological examination findings.
• To identify early markers of Alzheimer's disease in Down syndrome.

Main Methods:

• Longitudinal study of 26 adults with Down syndrome and their caregivers.
• Caregiver-reported emotional functioning assessed at two time points, one year apart.
• Cognitive functioning, neurological examinations, and MRI scans performed.

Main Results:

• Significant differences in depression, indifference, and pragmatic language functioning were observed between individuals with and without pathological MRI/neurological findings.
• Pragmatic language deficits, specifically in social discourse, emerged later in the course of suspected AD.
• Emotional levels remained stable over time, irrespective of cognitive decline, but were associated with specific neurological and imaging abnormalities.

Conclusions:

• Specific emotional and pragmatic language changes are associated with Alzheimer's disease progression in Down syndrome.
• Abnormalities in brain imaging and neurological examination suggest early frontal lobe dysfunction in DS individuals with AD.
• These findings highlight the potential for using pragmatic language assessments as early indicators of AD in Down syndrome.