"Fijoy George" <tofijoy at yahoo.co.in> wrote in message
news:ckjfem$je1$1 at mozo.cc.purdue.edu...
> I am a novice in Neuroscience. I have been reading on neuroimaging for the
> past few months and I notice that researchers pay a lot of attention to
> happens on the surface of the brain, and make conclusions and comparisons
> (between individuals) based on that. They do not seem to pay attention to
> any activity beneath the surface. Why is this so? How are they justified?
It's not justified, it is just a current limitation of the technologies.
This is being overcome. It is always good to be aware of such limitations.