The electroencephalogram in Alzheimer-type dementia. A sequential study correlating the electroencephalogram with...

Area of Science:

• Neurology
• Neuroscience
• Gerontology

Background:

• Alzheimer's disease (AD) is a progressive neurodegenerative disorder.
• Electroencephalography (EEG) is a tool for assessing brain activity.
• Longitudinal studies are crucial for understanding disease progression.

Purpose of the Study:

• To evaluate electroencephalographic (EEG) abnormalities and their evolution in Alzheimer's disease (AD).
• To correlate EEG findings with cognitive function and neuropathological changes.

Main Methods:

• A longitudinal cohort study involving 139 AD patients and 148 age-matched controls.
• Serial electroencephalograms (EEGs) were recorded over one to four years.
• Correlation analysis between EEG grade, psychometric scores, and autopsy-confirmed morphometric neuron loss.

Main Results:

• Significant differences in EEG patterns were observed between AD patients and controls.
• EEGs generally showed worsening over time, but most subjects had stable EEGs.
• EEG severity strongly correlated with psychometric scores and morphometric neuron loss in autopsied patients.

Conclusions:

• EEG abnormalities are present in Alzheimer's disease and can evolve over time.
• EEG findings are a reliable indicator of cognitive status and neuropathological changes in AD.
• EEG monitoring may aid in understanding AD progression and severity.