00:02
There is a time and location accuracy trade -off when using different brain imaging technique.
00:07
The eeg has high time resolution but poor location accuracy.
00:11
And vice versa, pat has a relatively poor time resolution, but much better location accuracy.
00:18
So how do you explain that? so this is what we call the trade -off between eeg and the pet.
00:30
So let's talk about eeg first.
00:37
Eeg is the electroencephalograph.
00:40
And eeg obviously has high temporal resolution.
00:55
It's in a millisecond ms.
00:59
So it can detect rapid change in brain activity.
01:35
So because it could detect rapid change in brain activity, it will be excellent for study real -time neural responses.
01:47
So excellent in study re -time.
01:59
Real -time neural responses.
02:18
So this will be the benefit of eeg.
02:22
However, it also has a low spatial resolution.
02:26
It measures the electric signal from the scope, meaning it is difficult to pinpoint exact location of the brain activity due to the signal spreading or volume connection...