Dementia Care Research and Psychosocial Factors

Area of Science:

• Neuroscience
• Cognitive Science
• Public Health

Background:

• Dementia is a major public health concern, with a significant portion of cases linked to modifiable risk factors.
• The Dynamic Neurocognitive Adaptation (dNA) scale was developed to quantify lifetime engagement in Cognitive (COG), Physical (PHY), Creative (CRE), and Social (SOC) activities across seven distinct life stages.
• Understanding these lifelong patterns can inform targeted prevention and intervention strategies for cognitive impairment.

Purpose of the Study:

• To investigate the association between lifetime engagement in COG, PHY, CRE, and SOC activities, as measured by the dNA scale, and neurocognitive outcomes.
• To explore the relationship between dNA scores across different life windows and both neuropsychological (NP) assessments and cortical thickness (CT) measurements.
• To identify specific activities and life stages that are most influential in maintaining cognitive health.

Main Methods:

• The study involved 67 participants (37 Cognitively Normal, 19 Mild Cognitive Impairment, 11 Alzheimer's Disease).
• Neuropsychological assessments and automated cortical thickness (CT) measurements using FreeSurfer were conducted.
• Hierarchical multiple regression analyses examined the impact of dNA domains and time-windows on NP and CT, controlling for age and education, with Bonferroni corrections applied.

Main Results:

• Specific combinations of activities, such as COG-1, SOC-4, and PHY-6, predicted verbal fluency.
• Early-life cognitive engagement (COG-1) and mid-to-late-life physical activity (PHY-6) showed significant positive correlations with verbal fluency.
• dNA domains (COG, CRE) and specific time-windows (1, 6) were associated with increased cortical thickness in several brain regions, particularly in the temporal and occipital lobes.

Conclusions:

• Lifelong engagement in cognitive, physical, creative, and social activities serves as a protective factor against cognitive impairment and Alzheimer's Disease.
• The study demonstrates a clear association between the degree of involvement in these activities and measurable neuropsychological and structural brain changes (CT).
• The dNA scale offers a valuable tool for capturing neuro-cognitive adaptation mechanisms throughout life, highlighting opportunities for preventative health strategies.