"... trippers experienced images through information drawn from many parts of their brains, and not just the visual cortex at the back of the head that normally processes visual information. Under the drug, regions once segregated spoke to one another."
This is PRECISELY what i've always said is going on in a trip: The barriers between different parts of your consciousness are dissolved.
This doesn't only help explain hallucinations and ego dissolution. It also helps explain the "bad trip" experience, when a person is shockingly exposed to areas of their consciousness they were completely unaware of, and which in some cases may hold terrifying thoughts, feelings, experiences that we have suppressed.
So great that some scientists are finally allowed to research this!