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Dried Blood Spot Collection of Health Biomarkers to Maximize Participation in Population Studies
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Biomarkers.

Michaela Nikpal1, Samantha Marshall1, Gianna Jeyarajan1

  • 1Western University, London, ON, Canada.

Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 24, 2025
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Summary
This summary is machine-generated.

Older adults without a history of falls show increased brain beta activity in real-world settings, suggesting enhanced environmental cognitive processing. This differs from those with a history of falls or Parkinson's disease.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Gerontology

Background:

  • Environmental cognitive processing is vital for daily navigation and fall risk assessment in older adults.
  • Variations in cognitive processing can impact environmental cue perception and response, particularly in older adults and those with neurodegenerative conditions like Parkinson's disease (PD).

Purpose of the Study:

  • To investigate variations in brain activity among older adults without a history of falls (NHOF), with a history of falls (HOF), and individuals with Parkinson's disease (PD).
  • To compare cognitive processing of environmental stimuli in different settings (laboratory vs. real-world) across these distinct populations.

Main Methods:

  • Utilized mobile electroencephalography (EEG) to record cortical activity in 45 older adults (mean age 70.41).
  • Compared brain activity in a quiet laboratory setting versus a stimulating real-world indoor environment (green wall, natural light, people).
  • Participants were categorized as NHOF, HOF, or PD.

Main Results:

  • Older adults with NHOF demonstrated significantly higher frontal and temporal beta frequency in the real-world condition compared to the laboratory setting.
  • Beta activation was not observed in the real-world condition for participants with HOF or PD.
  • No significant differences in frontal and temporal theta and alpha brain waves were found across conditions or groups.

Conclusions:

  • Elevated beta activity in NHOF suggests enhanced cognitive processing, attention, and sensory integration in complex environments.
  • This finding helps differentiate altered environmental cognitive processing in populations with mobility impairments and neurodegenerative conditions.
  • Highlights the impact of neurodegenerative conditions on environmental cognitive processing, underscoring the need for targeted interventions.