Ways of measuring body

Question 1

What are the 4 ways measure brain

Answer 1

EEG
ERP
fMRI
Post mortem

Question 2

What are EEG

Answer 2

electronogrom records changes in electrical activity in brain using electrodes attached to the scalp

Question 3

Strengths and weaknesses of EEG

Answer 3

Strength- Useful in discovering stages of sleep, epilepsy
Strength - Higher temporal resolution than fMRI - can monitor ongoing activities

L - lower spatial resolution
L - Not invasive enough to discover about certain disorders

Question 4

What are ERPS

Answer 4

Event related potentials - measures brainwaves triggered by events

Question 5

Strengths and weaknesses of ERPS

Answer 5

strength- Good temporal validity - better than EEG

Limitation - background noises can get in the way

Question 6

What are fMRI

Answer 6

• detect changes in blood oxygenation levels in brain

Question 7

strenght weakneses of fMRI

Answer 7

strength - Good spatial resolution up to 4 images per second
strength - loss less invasive than things like PET
limitation - Expensive
Limitation- Poor temporal validity 5 sec difference between images

Question 8

What are post mortem scans

Answer 8

• comparison of patients brain with healthy brain
• Any abnormalities assumed to be cause of neurological problem patient had