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Describe the term EEG scan

Briefly describe the term EEG scan? And as well describe the wave patterns appear in an EEG scan?

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Electroencephalography is generally termed as EEG. It is the recording of the electrical activity beside the scalp. This system can evaluate the fluctuations in voltage resulting throughout the ionic flow of current in the neurons of the brain. In EEG numerous electrodes are placed on the scalp that is employed to record brain’s spontaneous electrical activity over a small period of time. EEG can be employed for the diagnosis of encephalopathy’s, coma, and brain death.

Wave patterns frequently monitored in EEG are theta - drowsiness, delta - state of sleep, beta - active thinking and alpha - relaxation and gamma.

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