I took a psych class from Pribram at Stanford in 1972 when he was beating the holographic stuff. While some of it made sense, I've looked at holographic explanations of various phenomenae over the years and have mixed feelings. I think Pribram was a couple of bolts shy of having a real working brain theory (as time has shown in brain research, there are an awful lot of discrete rather than holographic connections present). Still, it's pretty cool stuff even if it has nothing to do with what is really going on. Makes some physical sense on a cosmologic scale if not for brains.
Here's the kicker though, if the brain is holographic, and the universe is also finely holographically connected, is the universe then a brain? I actually think it is.