Jan 17 - EEG

Question 1

what is eeg?

Answer 1

• non-invasive method to record electrical activity of the brain.
• Does not need a lot of effort from participant (exept if we ask them to speak)
• application in clinical diagnosis, sleep research (eeg while asleep) , and brain-computer interfaces.

Question 2

What does the eeg detect

Answer 2

it detects fluctuations in electrical activity in the brain.

Question 3

where does the eeg primarily detect electrical fluctuations?

Answer 3

in the cerebral cortex.

Question 4

What are the 5 main types of brain waves?

Answer 4

Delta, Theta, Alpha, Beta, Gamma

Question 5

What items make up an eeg setup?

Question 6

Why is it important for where the electrodes go?

Answer 6

If we are trying to generalize a claim about activity in the brain in a specific place we need to be able to reproduce the exact same results on each patient.w

Question 7

why do measurements in cm or inches useless for eeg?

Answer 7

because everyones head size is different.

Question 8

what are the 4 points of electrode placement?

Question 9

what is the percentage total between inion and nasion

Answer 9

100%

Question 10

if the 10-20 system isnt measured with cm or inches what is it measured with?

Answer 10

its measured by percentages to generalize everyones head sizes.

Question 11

T/F The 10 and the 20 refer to the percentage of the total circumference of the skull

Answer 11

False, the 10-20 system does not take into account the circumfrerence. it is about the percentage difference between the nasion and the inion.

Question 12

What does the O on the electrodes stand for? why would we focus on them?

Answer 12

The O is for occipital frequencies, so if we were intrested in the occiptial frequencies we would focus on those electodes.

Question 13

What does the N and P stand for in ERPS

Answer 13

negative and positive