FMRI’s Flashcards
How does FMRI work?
detect changes in blood oxygenation
What happens when the brain is more active?
It consumes more oxygen and to meet this increased demand blood flow is directed to the active area
What does FMRI produce?
3 dimension images showing which parts of the brain are involved in certain mental process - this has important implications for our understanding of localisation of function
What do FMRI’s not rely on unlike PET scans?
Radiation - if administered correctly it is risk free, non-invasive and straightforward to use
What are images like?
They have high spatial resolution, depicting detail by the millimetre and providing a clear picture of localisation
How expensive are FMRI’s compared to other techniques?
Very expensive
Why does it have poor temporal resolution?
There is around a 5 second time lag behind the image on the screen and the firing of neural activity
What do supporters argue?
They are the perfect tool for detecting truthfulness as it is able to see inside the brain
