An Electroencephalogram (EEG) test is conducted by attaching highly conductive electrodes to the scalp using a specialized paste or gel. These electrodes are designed to detect and record the electrical activity of the brain. A standard EEG procedure typically lasts around 20 minutes. However, the duration may be extended to facilitate the diagnosis of specific neurological conditions. For example, to identify seizures that occur during sleep, the recording period may be significantly prolonged, often requiring the patient to sleep during the examination. In certain cases, an EEG may span several days, concurrently incorporating continuous video monitoring. This comprehensive approach, termed video-EEG, is especially crucial for the differential diagnosis of epilepsy or as a vital component of pre-surgical assessment for epilepsy. During a routine EEG, various activation procedures are commonly employed to stimulate and more effectively capture the brain's electrical responses or potential seizure activity. These procedures typically involve opening and closing the eyes, deep breathing (hyperventilation), and exposure to rhythmic flashing lights (photostimulation). A qualified technician instructs and guides the patient through these specific maneuvers. The brain's electrical activity is digitally captured as waveforms, which are subsequently analyzed by a neurological specialist.