In ___________, Richard Canton first recorded and reported electrical activity from an animal brain

1875

In __________, Hans Berger first RECORDED human EEG from an intact skull

1924

Hans Berger REPORTED first human EEG reading in what year?

1929

By the ____, EEG's were in common use in hospitals

50s

In the _ _ _, EEG and other neurodiagnostic testing were used in surgeries

70's

By the ___, digital EEG's became available on the market

90's

Electroencephalography (EEG)

The study of the electrical activity of the brain. This is the first neurologic test to be learned and is the basis of other tests

Interpreting Physician

Typically, a neurologist/doctor who reads the EEG and interprets the results, after complaining fellowship training in Neurophysiology

Duties of EEG tech

- measures and secures the application of electrodes - records the EEG while observing clinical behavior and technical details and makes clear notes -acts as link between patient and doctor, providing accurate reports

Ethics of EEG tech

- maintain patient confidentiality -maintain patient safety -preform duties with accuracy and honesty -understand the scope of practice, and never make an official "reading" or report

What is the primary purpose of the international 10-20 system of measurement

to standardize EEG measurements worldwide

Which landmark is defined as the bridge of the nose?

Nasion

Which landmark is the occipital protuberance?

Inion

Which landmark is the notch superior to the tragus of the ear?

Pre-auriculares

During which step do you measure left pre-auricular to the right pre-auricular

Step 3- Measure Coronal Plane

How much distance is marked from the nasion and inion to find FPZ and Oz respectively?

10%

Which plane measurement involves marking halfway points between Fp1, C3, and O1

Left parasagittal plane

What happens if the electrodes are placed too close together, such as between F4 and C4?

the EEG amplitude is reduced

why is it important for an EEG technologist to use the correct measuring method?

to ensure consistent interpretations across all EEG's

T or F: before placing electrodes, the skin must be prepped with an approved skin cleanser

True

T or F: It is recommended to use excessive paste when applying paste-type electrodes to ensure they stay on longer

False

T or F: Collodion is quicker to apply than paste and has no noxious smell

False

T or F: Collodion can be a fire hazard, so it should not be used near ignition sources

True

T or F: Paste type electrodes are ideal for long-term monitoring as the stay on very well for extended periods

False

T or F: when prepping the skin, you should rub the entire cross-mark off the ensure proper electrode contact

False

T or F: collodion application requires the use of forced air to dry the collodion on the electrode

True

T or F: after applying paste type electrodes, you should cover them with gauze, cotton, or paper tape to secure them

True

T or F: the main concern during electrode application is skin breakdown, which can be prevented by gentle prepping

True

T or F: collodion application does not require any special ventilation because it has no strong smell

False

T or F: proper skin prep includes wiping off any excess prep with damp wash cloth or alcohol wipe

True

What is the ideal impedance level for attached electrodes?

5 Kohms

what type of electrodes are single use and primarily used during inoperative neural monitoring or home EEG patients?

Disposable electrodes

what electrode application method provides quicker set up and clean up without strong odors, but is less durable?

Paste

what medical specialist is responsible for analyzing, interpreting, and issuing reports on recorded EEG?

neurologist

what is the central location halfway between the inion and nasion?

Cz

what system provides higher density electrode placement and is often used for epilepsy surgery candidates?

10-10 system

what is the midline point located 10% above the nasion?

Fpz

what standardized system is based on 10% and 20% intervals?

10-20 system

where are the reference electrodes commonly placed?

on the earlobes or mastoid bones

what electrodes and inserted directly into the brain tissue to locate epileptic focus?

depth electrodes

what electrodes are placed directly on the surface of the brain underneath the dura?

subdural electrodes

what physiological channel is used to record muscle activity?

EMG

what channels are used to detect or rule out cardiac artifact?

EKG

what is the most common type of scalp electrode?

disk

what diagnostic test is the queen's square electrode primary associated with?

Visual evoked potential

Skull Defect

Breach defect

why is a skull defect important during EEG electrode placement?

it can affect the EEG signal and requires special consideration/appropriate electrode placement

what solution is used to safely dissolve and remove collodion from the scalp?

collodion remover