Brain Scans

Question 1

What is FMRI and how does it work

Answer 1

Detects blood flow in the brain as more active areas require more blood. Active area can be compared to low activation areas with a lower blood supply.

Question 2

Advantages of FMRI

Answer 2

Good spatial resolution. Precisely identifies active brain regions and patterns

Question 3

Disadvantages of FMRI

Answer 3

Expensive and hard to build

Question 4

What is EEG and how does it work

Answer 4

EEG is when 22-34 electrodes is placed on the scalp using a cap and conductive gel. The electrodes measure the activity of the cells directly below them. Activity is shown by brain waves. amplitude of the waves shows brain intensity and frequency shows speed of brain activity.

Question 5

Advantages of EEG

Answer 5

cheaper than alternative brain scans. shows how individual cognitive processes take place.

Question 6

Disadvantages of EEG

Answer 6

cannot detect the activity within the deep brain

Question 7

What is ERP and how does it work

Answer 7

same as EEG. Records activity in reaction to stimulus