ABC Medical Center > Procedimientos > Electroencephalogram


21:59 - 4 May , 2021

Medical procedure



What is Electroencephalogram?

Through this neurological test it is possible to monitor the brain’s electrical function captured by electrodes placed externally on the patient’s head. 

This analysis and monitoring is achieved because the neurons or brain cells constantly emit electrical signals to establish links and communicate with each other, this is registered graphically on an electroencephalogram as undulations in a linear progression. 

This procedure is used as a diagnostic test for patients with epilepsy and other convulsive conditions, although it is also indicated to confirm various diagnoses such as:

  • Injuries to the brain from trauma and other causes.
  • Brain tumors.
  • Encephalitis and other brain conditions.
  •  Trouble sleeping.
  • Stroke.

Likewise, an electroencephalogram is a brain death confirmatory test in comatose patients or in those who suffered an accident, in addition to being a means of monitoring and determining anesthetic doses in patients in an induced coma. 

As it is a safe test that does not cause any pain, no special preparation is required, except avoiding caffeine the day before the test since it can alter the recording and results. 

Being a fast and effective outpatient test you can return home when it is concluded and resume your usual activities unless you were sedated, then you must wait for its effects to disappear completely. 

At the Neurophysiology Clinic we are prepared to offer you the most advanced neurophysiological tests to diagnose the various pathologies that affect your nervous system, which represent a quantitative, reproducible, and generally non-invasive measure that enriches the neurological examination, providing an interaction platform and support in the diagnosis and treatment of neurologically affected patients.

The tests we perform include all the tools of a comprehensive neurophysiology service:

  • Electroencephalogram.
  • Electromyography.
  • Evoked potentials.
  • Outpatient polysomnography.
  • Hospital polysomnography.
  • Transcranial doppler.
  • Neuro-otology tests.
  • Otoacoustic emissions.
  • Intraoperative monitoring.
  • Magnetic stimulation.

Related centers and departments:


  • Lazos-Constantino G. Electroencefalograma y el hemisferio cerebral derecho. Arch Neurocien. 2012;17(3):195-205.
  • Guillén-Cánovas EJ, Linares-Cánovas LP, Romero-Valdés YC. Neuromonitoreo intraoperatorio en el manejo del paciente con afecciones asociadas al sistema nervioso. Universidad Médica Pinareña. 2020;16(1):1-13.
  • Alderete BJ, Islas GD, Quiroz SCV, et al. Síndrome de Panayiotopoulos. Cuadro clínico y alteraciones electroencefalográficas. An Med Asoc Med Hosp ABC. 2021;66(1):67-71. doi:10.35366/99493. 
  • Maureira CF. El exponente de hurst como parámetro de análisis de señales del EEG para comprender la cognición humana: una revisión. Rev Elec Psic Izt. 2020;23(4):1573-1591.

The dissemination of the content of this material is for informational purposes only and does not replace, under any circumstance or condition, a consultation with a specialist doctor, for which the ABC Medical Center is not responsible for the different use that may be given to it. If you require more information related to the subject, we suggest you contact the specialist doctor you trust directly.