I think you were right about the brain chemistry thing.

I really would like to get a look at your brain chemistry.

You'd think I'd remember the feel of my brain chemistry changing.

There is so much scientific evidence about our brain chemistry.

Researchers say that in part, it may come down to simple brain chemistry.

Had pretending to be somebody else actually changed her brain chemistry for a few minutes?

It appears to have altered brain chemistry or some such.

"Yeah, but were the first voices your master or just bad brain chemistry?"

For some people, these changes upset the brain chemistry and cause depression.

The Science studies also ignore simple truths about brain chemistry.

But that could change, as more is learned about the brain chemistry of compulsive behavior.

"I'll give you a crash course in brain chemistry to help explain," she said.

Now they think a change in brain chemistry may also cause a tension headache.

This is believed to occur as a result of the changes in brain chemistry from long-term use.

Brain chemistry shaped the individual's choice of actions, no matter how much that person might believe in free will.

Some researchers feel that depression leads to changes in brain chemistry.

"I believe that my brain chemistry has changed as a result of this, mostly for the better.

It is a problem with your brain chemistry, not your character.

The phrase originated from the scientific study of brain chemistry.

It's almost a matter of brain chemistry, he says.

Some prescription medications can change brain chemistry and cause depression.

It is unclear if their unique brain chemistry changes the outcome of the research.

It doesn't normally begin until your brain chemistry registers a sleep state.

His brain chemistry was altered beyond recovery, and he couldn't have been happier.