Functional images, which are also called T2* weighted images, and
we'll talk about that again as we move along, have lower spacial resolution, so
they're much blurrier than their structural counterparts.
However, we can measure many of them, and so they have higher temporal resolution,
and they can therefore be used to relate changes in signal
to an experimental manipulation.
So in this cartoon here, we have a bunch of images that are acquired while you're
performing Condition A, and a bunch that are performed by condition B.
So, in the last module we gave an example where you finger tapping, which
might be condition A, and then you're resting, which could be condition B.
So they have measurements under both conditions, and then we might want to look
at the differences in signal between the two different conditions, and
that's something that we can do with functional images.