Rowan & Tolunsky EEG Primer

Question 1

What causes rhythmic EEG signal, such as alpha

Answer 1

Cells in the nucleus, reticularis of the thalamus that have pacing properties

Interaction between cortex and thalamus

The activity of thalamic pacemaker cells

Question 2

What is the origin of the scalp EEG activity?

Answer 2

Postsynaptic potentials

Question 3

In the international 10–10 system of electrode placement, there are remaining electrode positions in the 10% intermediate lines between the existing standard Coronel and sagittal lines. How are these additional electrode locations labeled?

Answer 3

AS, FC, CP, PO, FT & TP

Question 4

What mechanism maintains rhythmic cortical activities such as alpha

Answer 4

The functional properties of large neuronal networks in the cortex that have an intrinsic capacity for rhythmicity.

Question 5

One of the problems with electroencephalography is the amplification of tiny currents into graphic representation’s that can be interpreted. What else, besides actual EEG information, is amplified by the system?

Answer 5

Extra cerebral potential’s
Mains artifact
Radio frequency noise

Question 6

What is the advantage of the international 10–10 system?

Answer 6

Better localize is epileptic form activity

Increases EEG spatial resolution

Improves the detection of localized evoked potentials

Question 7

The method of recording EEG, using to active electrodes in comparing them to each other in order to a lemonade, common signals is called common mode rejection. What is another term for this method?

Answer 7

In phase cancellation

Question 8

Electrical events occurring in the cortex produce maximal voltage at a particular electrode location, also affecting adjacent electrodes, but to a lesser extent as the potential wins from the point of origin. How is this described in Rowan’s Primer of EEG?

Answer 8

A flow of current that creates a field that spreads out from the origin of an electrical event

A potential field

The summation of a PSP and EPSP in a neuronal net

Question 9

What types of metals are commonly used an EEG recording

Answer 9

Silver/silver chloride

Tin

Gold

Platinum

Question 10

In the international 10–10 system of electrode placement, which, for electrodes received new designations from the 10–20 electrode placement system

Answer 10

T3, T4, T5, and T6 became T7, T8, P7 & P8