This seems obvious in hindsight. We know that thinking causes physical effects on the brain. (I mean: half of our (limited) understanding of the brain comes fr

This seems obvious in hindsight. We know that thinking causes physical effects on the brain. (I mean: half of our (limited) understanding of the brain comes from measuring bloodflow.) So yeah, of course something that's affected by bloodflow (like, say, cancer) will be affected by thoughts. The better question is: is there a strong enough effect from actual thoughts (as opposed to direct neural stimulation, which is what this paper uses) to cause the same effect?