[tbugrara]

You're taking that one line out of context in his post. Yes of course the brain is special because it's the only organ that makes you, you. Just like the heart is special because it's the only major organ that if you removed, blood would stop flowing.

GP's point was that in the context of how medication affects our bodies, the brain and body are more connected than we tend to think. Medication doesn't either only affect our body or our only affect our brain. It affects the entire system.