A dream is not simply a mental image. It is fully physiological as well. The dream process creates full PHYSICAL, EMOTIONAL, VISUAL, SENSORY, SEXUAL, experience. It IS NOT simply a mental visionary thing. The whole brain sends out impulses to the body to move, to feel, to experience. One may take this for granted while it happens in sleep. This may be because one might think of dreams as a fantasy or mental image. They are not. They link with full physical process and sensation.
