Key result
Higher EEG beta activity is linked to better cognitive performance and drops with early decline.
Why the study?
The relationship between quantitative EEG measures and cognitive decline in normal elderly subjects was not well characterized.
Does topographic computer analysis of the EEG correlate with cognitive decline in normal elderly subjects?
Observational (n=53)
Does topographic computer analysis of the EEG correlate with cognitive decline in normal elderly subjects?
A reduction in fast (beta) activity on EEG may serve as an early indicator of intellectual loss and cognitive decline in normal elderly subjects.
Answers are grounded in this paper and cite their sources.
Reduced beta activity may flag early decline; hypothesis-generating for EEG as cognitive biomarker pending larger studies.
We obtained a topographic computer analysis of the electroencephalogram in 53 normal elderly subjects. Normal aging was not associated with an increase in slow (delta) activity. However, cognitive performance correlated positively with fast (beta) activity particularly in frontal leads, even after controlling for age, education, occupation, and medication. Five subjects who showed early signs of cognitive decline, had all a marked reduction in beta activity suggesting that this may be an early indication of intellectual loss.
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Williamson et al. (1990) conducted an observational in Cognitive decline (n=53). Fast (beta) activity on electroencephalogram was evaluated on Cognitive performance. Fast (beta) activity on electroencephalogram correlated positively with cognitive performance, with marked reductions observed in subjects showing early signs of cognitive decline.
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