In that state, the mind ceased to think logically and the body responded reflexively.

For them, their life ends when the mind ceases to function.

People were often like rabbits; frighten them, and their minds ceased to work.

When the mind ceases to operate, the spell is gone.

'Who is to say when the mind ceases to operate?'

I turned back to stare down at him where he sat, so deep in shock that my mind had ceased to function.

The implication is that the mind fails to survive brain death and ceases to exist.

But apparently your mind has practically ceased to function.

His mind could not cease struggling with plans and calculations.

He sat in the pool and his mind ceased to function.