fMRI
works by detecting changes in both blood oxygenation and flow that occur as a result of neural brain activity
1 of 14
what does fMRI produce
fMRI produces three dimensional images showing which parts of the brain are involved in a particular mental processes
2 of 14
strength of FMRI
-does not rely on use of radiation
-risk free, non invasive, straightforward
-produces images that have high spatial resolution
3 of 14
limitations of FMRI
-expensive
-poor temporal resolution because there is a 5 second time lag
-does not truly represent moment to moment brain activity
-difficult to use to children and people with disabilities because you have to lie still
4 of 14
what does electroencephalogram (egg) do
measures electrical activity with in the brain via electrodes that are fixed to an individual's scalp using a skull cos
5 of 14
what can EEG help diagnose
certain conditions of the brain such as epilepsy and sleep disorders
6 of 14
strength of electroencephalogram
-useful in studying stages of sleep and in the diagnosis of epilepsy
-extremely high temporal resolution
7 of 14
limitation of eeg
-not successful in pin pointing the exact source of neural activity
-eeg lies in the generalised nature of the information received
8 of 14
what is event-related potentials
a statical analysis of data from electroencephalogram
recording and picking out the response to a certain event
9 of 14
strength of erp
good temporal resolution
used to measure cognitive functions
brings more specificity to measurements of neural processes
10 of 14
weakness of erp
lack of standardisation
extraneous material must be completely eliminated which can be time consuming
11 of 14
what is post mortem examinations
the analysis of a persons brain following their death
areas of damage with in the brain are examined after death to establish the likely cause of the problem
12 of 14
strength of post mortem examinations
provides useful information
-vital in our understanding of key processes in the brain- Broca and Wierncke both relied on post mortem examinations
13 of 14
weaknesses of post mortem examinations
ethical issues- cannot give informed consent
-hard to identify wether issues are due to trauma or decay
14 of 14
Other cards in this set
Card 2
Front
what does fMRI produce
Back
fMRI produces three dimensional images showing which parts of the brain are involved in a particular mental processes
Comments
No comments have yet been made