FMRI BOLD
Test Your fMRI Knowledge!
Are you ready to dive into the fascinating world of fun
- Explore critical terms like BOLD and cerebral blood models
- Analyze fMRI signal peaks and their implications
- Enhance your knowledge on spatial resolution and temporal dynamics
When is the blood vessels on the fMRI image the darkest? When O2 content is...
100%
50%
0%
None of the above
What is the name of the model above?
The blood volume model
The cerebral blood model
The baloon model
The venous model
What does BOLD stand for?
Blood-oxygen-level-dependent
Blood-oxygen-leveling-dependency
Brain-oxygen-leveling-dependent
Brain-oyxgen-level-dependent
When does the BOLD signal peak?
3
4
5
6
When does the BOLD signal undershoot?
8
10
12
15
Why are large vessels problematic in terms of spatial resolution?
They hide tissue we ant to look at.
They make the MR signal disappear, due to spin interference.
They cause a field inhomogenity, as dHb rushes through them.
They cause the MR signal to become steady ("maximally smooth" the signal).
Many analysis steps sacrifice ... for ... resolution.
Temporal, spatial
Functional, temporal
Temporal, functional
Spatial, functional
What happens when you decrease the TR?
The estimates of vascular changes improve, especially for very short RTs.
The estimates of vascular changes get worse, especially for very long RTs.
The estimates of vascular changes improve, as long as the RT is not too short.
The estimates of vascular changes get worse, as long as the RT is not too short.
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