Electromagnetic field stimulation modulates working memory and cortical alpha oscillations in healthy adults
This randomized, between-subjects study in 98 healthy volunteers tested whether patterned EMF stimulation alters Digit Span performance and EEG activity. Theta-Burst stimulation reduced working memory (Digit Span Backward) and was associated with increased high-alpha activity in frontal regions. Theta-Gamma stimulation reduced Digit Span Forward performance without detectable EEG changes, suggesting pattern-specific effects on behavior and, in some cases, neural activity.
Key points
- Ninety-eight healthy volunteers were randomized to Theta-Burst, Theta-Gamma, 40 Hz gamma, or sham stimulation.
- EMFs were applied for 30 minutes in unilateral left, unilateral right, or bilateral temporal-lobe configurations.
- Theta-Burst stimulation reduced Digit Span Backward performance (working memory).
- Theta-Burst was accompanied by increased high-alpha (10–12 Hz) activity in the left inferior frontal gyrus and a whole-brain effect centered on the right superior frontal gyrus.
- Theta-Gamma stimulation reduced Digit Span Forward performance (short-term recall) without detectable EEG changes.
- The reported effects were frequency- and pattern-specific and differed across memory domains.
- The authors suggest stimulation parameters could potentially be optimized for neuromodulation applications.
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AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
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