Elektroenkefalografia
Elektroenkefalografia, commonly known as electroencefalografia (EEG), is a non-invasive method for recording the electrical activity of the brain by placing electrodes on the scalp or skull. It measures the summed electrical potentials arising from cortical neurons, providing very high temporal resolution but relatively limited spatial detail.
Recordings are obtained with an array of electrodes arranged according to systems such as the 10-20 convention.
The data are displayed as waveforms across frequency bands: delta (>4 Hz), theta (4–7 Hz), alpha (8–13
Applications encompass diagnosis and monitoring of epilepsy, assessment of coma and prognosis after brain injury, evaluation
Limitations include limited spatial localization and vulnerability to artifacts from eye movements, muscle activity, or environmental