A woman sits in a hospital bed after testing muscle control by touches her nose with the tip of her finger. A man and woman walk through a wooded park with a picnic basket. Man lays a blanket down on the grass for the picnic. Freeze frame on woman’s face with a question mark over her head. Narrator discusses how the human brain functions. Animated brain cells and neurons show how electrical impulses work in the brain. Explanation of how chemicals affect the brain’s activity. Signals and impulses transmitted from dendrites to cell body to axons to synapse. Animation of the synapses separating nerve cells. Animated chemicals block impulses.