Can the brain be totally free?

With specialization, does the brain become limited? Can the human brain be totally free?

The brain is kept active solving problems. Will it deteriorate when computers take over?

Is the central content of human consciousness fear, pleasure, pain, sorrow and death?

Is fear the reaction of memory holding on to the past? How can the brain not register yesterday's incident which gave delight?

In listening to the speaker are you listening to yourself and so bringing about freedom in which the whole brain can operate?