1
Q
What is the purpose of fMRI?
A
Observing the functions of the brain
2
Q
What is the mechanism of fMRI?
A
Detects the changes in blood oxygenation
3
Q
Notes on resting/activated
A
4
Q
What happens for the stimlus to create a fMRI BOLD response?
A
- Triggers a neuronal activity leading to neurovascular coupling and then a haemodynamic response which is then detected by the MRI scanner
5
Q
What is neurovascular coupling?
A
Dyanmci process where neuronal activity singals the brain’s blood vessels to adjust blood flow to match the brain’s energy demands
6
Q
What is the mechanism of haemodanmic response?
A
CHanges in neuronal activity to constriction/dilation of blood vessels
7
Q
How does neurovascular couping enable better MRI signal?
A
- Less Hemogloblin
- Slower dephasing
Neuroimaging
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