What is an electroencephalogram (EEG)?

An electroencephalogram (EEG) is a test during which the electrical signals of the brain are recorded. This electrical activity is detected by electrodes, or sensors, placed on the patient’s scalp, and transmitted to an amplifier that records the activity.

Last reviewed by a Cleveland Clinic medical professional on 02/09/2016.

References

  • Epilepsy Foundation. EEG Accessed 2/11/2016.
  • Aminoff MJ. Electrodiagnostic Studies of Nervous System Disorders: EEG, Evoked Potentials, and EMG. In: Kasper D, Fauci A, Hauser S, Longo D, Jameson J, Loscalzo J. eds. Harrison's Principles of Internal Medicine, 19e. New York, NY: McGraw-Hill; 2015. library.ccf.org Accessed 2/11/2016.
  • Ropper AH, Samuels MA, Klein JP. Chapter 2. Imaging, Electrophysiologic, and Laboratory Techniques for Neurologic Diagnosis. In: Ropper AH, Samuels MA, Klein JP. eds. Adams & Victor's Principles of Neurology, 10e. New York, NY: McGraw-Hill; 2014. library.ccf.org Accessed 2/11/2016

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