After the test, acetone (like nail polish removal) or a similar solution is used to remove the glue at the end of the test. In these cases, stereotactic electroencephalography (SEEG) may be useful. Because the electrodes must stay on your head longer than for a regular EEG, the technologist will probably use a special glue called 'collodion' to keep them in place. In some cases of drug-resistant focal epilepsy, a routine EEG may not be enough to determine where a seizure begins or to identify parts of the brain that control motor function and speech.For instance, the electrodes may make your head itchy, and if you scratch it, that may appear as abnormal activity on the EEG. This will help the doctor identify the cause of activity on the recording. An EEG test gives information about the electrical activity that is happening in your brain at the time the test is carried out. During the test, keep a diary of what you do during the day and if you've had any seizures or other symptoms.During the test, you can go about your normal routine for up to 24- 72 hours.The electrodes on your head are covered with a cap or gauze dressing.You can wear the recorder on your waist, with the wires running either under your shirt or outside of it.EEG wires are placed on your scalp, like in a routine EEG, then attached to a special recorder that is slightly larger than a portable cassette player.The label 'z' points to electrode sites in the midline of the head.

Even numbers identify electrode positions on the right side of the head, and odd numbers refer to the left side. An ambulatory EEG test makes a recording of your brain's activity over a number of hours or days. The localization of the brain waves within the brain regions or lobes is further narrowed by adding electrodes, which are given numbers such as T3, T4, P3, P4.

Epilepsy eeg vs normal eeg