**3. Study scenario**

#### **3.1 General scenario**

The study is carried out for at least 20 minutes and includes the following procedures:

Background recording 3–5 minutes (but not less than 3 minutes)

Opening eyes—1 min. Closing eyes—1 min.

Background recording—3 min.

Test with photostimulation (rhythmic light flashes are presented with the help of a photostimulator):

• Hz—10 sec.

◦ Break 5 sec

*Practical Recommendations for Conducting an EEG Study in a Neurophysiological Laboratory DOI: http://dx.doi.org/10.5772/intechopen.108879*

• 2 Hz—10 sec.

◦ Break 5 sec

	- Break 5 sec
	- Break 5 sec

◦ Break 5 sec

• 25 Hz—10 sec.

Background recording—3 min. Opening eyes—1 min. Closing eyes—1 min. Background recording 1 min. Hyperventilation—3 min. Background recording—5 min. Opening eyes—1 min. Closing eyes—1 min. Study Termination

#### **3.2 Children**

In children and adolescents, it is sometimes difficult to make a full-fledged recording, according to the "10-20" system due to the small size of the head, and it is also difficult for children to remain still for a long time. At the same time, due to the functional immaturity of the structures of the child's brain, the desired phenomena manifest themselves better than in adults. Thus, an EEG study in children takes at least 15 minutes and includes the following tests:

#### **3.3 Scenario "Children"**

Background recording 3 min Eye opening—1 min. Eye closing—1 minute Background recording—1 min.

Test with photostimulation (rhythmic light flashes are presented with the help of a photostimulator)

	- Break 5 sec
	- Break 5 sec
	- Break 5 sec
	- Break 5 sec
	- Break 5 sec

Background recording—1 min. Opening eyes—1 min. Closing eyes—1 min. Background recording—1 min. Hyperventilation—3 min. Background recording—3 min. Opening eyes—1 min. Closing eyes—1 min. Study termination
