Well I ain't going to copy the wrong debate it's way to long. He mentions in the debate which is about the mind/body problem that dualists used to believe that all conscious actions such as vision, hearing, tasting things etc.]. That they were all attributed to a non physical soul. But now we know that all those things that caused by brain processes. Now it's true that the mind is dependent on the brain. He acknowledges that the mind also affects the brain. He thinks that fits well with physicalist theories of mind/brain. This however argues for downward causation. Hmm, he says he has read up on neuroscience. By the way this user's name is Deathmonkey and he is a physicist.
A new book, Train Your Mind, Change Your Brain, by Sharon Begley) goes on to discuss, there is growing evidence that the mind can influence the physical characteristics of the brain — the brain can change in reaction to the mind, and the causation is not always “one way.” Experiments on humans (some of the Buddhist monks under the Dalai Lama’s direction) seem to demonstrate that the physical organ of the brain can be shaped and transformed by choices made by the mind.
He also says that neuroplasticity can be explained in a physicalist context. But all of this phenomenon argues for downward causation which physicalist's say is impossible.