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Electroencephalography (EEG), in which electrodes placed on the scalp pick up electrical signals underneath, and magnetoencephalography (MEG), which detects magnetic indications of brain activity, are
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Electroencephalography (EEG), in which electrodes placed on the scalp pick up electrical signals underneath, and magnetoencephalography (MEG), which detects magnetic indications of brain activity, are examples of what?

User Guy Joel McLean
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does electrical curents flows of charges across the membrane and the depolarization continues also due to charges that reject each other and the flow continues .so there appears a magnetic field as well
User Haddr
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