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The quality of EMG recordings is optimized when the skin is cleaned with an alco...

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The quality of EMG recordings is optimized when the skin is cleaned with an alcohol swab because

Alcohol dehydrates the skin and thus improves EMG signal quality.

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Alcohol serves as a protective layer between skin and electrode and increases impedance.

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Cleaning hydrates the skin and avoids skin irritation.

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Alcohol removes dead skin cells and lipid-rich secretions and reduces impedance.

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