Biological - Scans

Question 0

2 strengths of post mortem?

Answer 0

• no ethical issues as they are already dead.

- it is performed on humans not animals therefore generalisations can be made.

Question 1

What is a post-mortem?

Answer 1

examine brains after death

Question 2

2 weaknesses of post mortem?

Answer 2

• not possible to compare how a person behaved before brain damage afterwards.
• no evidence of brain activity

Question 3

What is an EEG?

Answer 3

Electrodes are placed all over the scalp and records electrical activity of a part of the brain

Question 4

2 strengths of an EEG?

Answer 4

(Ethical) safe and painless

(Methodological) used to study differences between left and right sides of the brain

Question 5

2 weaknesses of EEG?

Answer 5

(Methodological) cannot tell what the person is thinking.

Not very detailed, it only gives a global picture of brain activity.

Question 6

What is a PET scan?

Answer 6

Head gets put in scanner using a radioactive chemical to measure different parts of the brain.

Question 7

2 strengths of PET?

Answer 7

• can show different areas of the brain that are activated on different people.
• it is used effectively to diagnose early stages of illnesses such as epilepsy.

Question 8

2 weaknesses of PET?

Answer 8

• it is expensive

- ethical issue of injecting a radioactive chemical.