He tried to focus on something, anything, to keep his brain functioning.

My brain would no longer function in a healthy way.

It is the way his brain functions that isn't quite right.

And then he realized that his brain wouldn't function either.

Some, however, have suggested that my brain was not functioning to begin with.

It's even providing some sort of energy to keep your brain functioning.

But you're the only one who knows how normally your brain is functioning.

The brain, he thought, simply can't function without adequate blood sugar.

If my brain had been functioning right I would have used the intercom system to track her down.

Could it be because the reptilian brain is still present and functioning?