Brain computer interfaces and brain imaging
3 important questions on Brain computer interfaces and brain imaging
What leads to the measurable activity that is seen on an FMRI?
Stimulating the brain-> neuron needs energy which gets it from oxygenated hemoglobin in the blood
How come brain activity induces a magnetic field?
Hemoglobin has magnetic properties, which change with oxygenation level
What is the most severe limitations of fmri?
The speed of the signal, it takes a few seconds after neuronal activity to get the fresh blood supply needed
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