Lecture 29

Question 1

What colours on the EEG decomposed traces show change from baseline?

Answer 1

Red and Blue indicate change from baseline, green is baseline.

Question 2

Explain the method that measures event related potentials to a specific stimulus

Answer 2

• Entire waveforms are used, the frequencies are not decomposed
• Looking at peaks in waveform at different brain locations by measuring activity at specific time windows at the electrode of interest

Question 3

Describe the process of ERP

Answer 3

1. Present stimulus
2. Record EEG
   - Average traces after time locking to a specific stimulus

Question 4

How is activity coded in an ERP?

Answer 4

P = positive (wave moves down)
N = negative (wave moves up)
-Number following this represents approx when the peak occurred in relation to stimulus marker

Question 5

What is an ERP?

Answer 5

An event related potential

-The brain’s response to a particular stimulus or motor response