What are the basic requirements of machine used for measuring EEG?

What are the basic requirements of machine used for measuring EEG?

The essential components of an EEG machine include electrodes, amplifiers, a computer control module, and a display device.

How does EEG machine work?

During an EEG, small electrodes and wires are attached to your head. The electrodes detect your brain waves and the EEG machine amplifies the signals and records them in a wave pattern on graph paper or a computer screen (Fig. 1).

What can interfere with EEG?

Lights, especially bright or flashing ones. Certain medicines, such as sedatives. Drinks containing caffeine, such as coffee, cola, and tea (while these drinks can occasionally alter the EEG results, this almost never interferes significantly with the interpretation of the test) Oily hair or the presence of hair spray.

Are there different types of EEG?

There are now many types of EEG and many different terms used to describe them.

How many different device components are involved in an EEG recording?

In most clinical applications, 19 recording electrodes (plus ground and system reference) are used. A smaller number of electrodes are typically used when recording EEG from neonates.

What is montage in EEG?

Montages are logical, orderly arrangements of electroencephalographic derivations or channels that are created to display activity over the entire head and to provide lateralizing and localizing information. Most often, bipolar and referential montages are used for routine electroencephalographic recordings.

What is frequency in EEG?

The electroencephalogram (EEG) is the depiction of the electrical activity occurring at the surface of the brain. Frequency (Hertz, Hz) is a key characteristic used to define normal or abnormal EEG rhythms. Most waves of 8 Hz and higher frequencies are normal findings in the EEG of an awake adult.

Can you eat or drink before an EEG?

Do not eat or drink anything with caffeine in it for 12 hours before the test. This includes cola, energy drinks, and chocolate. Shampoo your hair and rinse with clear water the evening before or the morning of the test. Do not put any hair conditioner or oil on after you wash your hair.

What is Theta and Alpha?

Alpha brainwaves are slower, and higher in amplitude. Their frequency ranges from 9 to 14 cycles per second. The next state, theta brainwaves, are typically of even greater amplitude and slower frequency. This frequency range is normally between 5 and 8 cycles a second.

What is a 4 day EEG?

Ambulatory EEG (electroencephalogram or ee-LEK-tro-en-SEFF-uh-loh- gram) monitoring is a test that measures and records electrical activity in the brain for up to 48 hours while your child is at home or school. This test uses a special recording unit that is slightly larger than a smartphone.