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Electroencephalogram (EEG)


An electroencephalogram (EEG) is a diagnostic test that measures and records the brain's electrical activity. Using electrodes placed on the scalp, the test translates brain electrical signals into wave patterns that are analyzed by specialists. It is a fundamental tool for evaluating the functioning of the central nervous system and supporting the diagnosis, monitoring, and management of various neurological conditions.


The electroencephalogram is primarily used for the evaluation of:

  • Seizure disorders, such as epilepsy
  • Sleep disorders
  • Behavioral changes of possible neurological origin
  • Severe brain injuries
  • Coma states

In addition, the electroencephalogram can complement:

  • Brain tumor assessment
  • The assessment of brain function in complex clinical situations

The Electroencephalogram (EEG) service measures and records brain electrical activity using:

  • Standard EEG studies:
    • Approximate duration of 20 to 40 minutes
  • Video telemetry:
    • Correlation of brain activity with clinical manifestations
    • Especially useful in patients with epilepsy

In addition, the service supports:

  • The diagnosis of sleep disorders, in conjunction with studies such as polysomnography
  • Monitoring brain activity in critically ill patients
  • Confirmation of brain death in specific clinical contexts

  • Clinical Neurophysiology
  • Epileptology

Exam preparation

For the electroencephalogram (EEG), you must arrive with clean, dry hair. For studies performed on children, partial or total sleep deprivation may be necessary the night before, as indicated by a doctor.


Request your appointment with the Electroencephalogram specialists.


Call us: (+57) 602 331 9090 ext. 7253


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