Ivan's brain kept picking at the scenario, despite his stern order to it to stop now.

He hadn't had the brains and judgment to keep his hands off the wrong woman.

His brain kept track of a million details, each piece of the puzzle, every necessary action.

Stopped heart and breath, kept only the brain alive.

If your brain keeps growing, what happens to your head?

"I don't have the brains to keep my mouth shut."

There's nothing wrong, but the brain keeps saying that there is.

"It appears that the brain keeps itself operative with activity."

The only thing his brain kept circling back to was the land communications line.

Your brain keeps squirting out a single thought: I'm going to die.