The hemispheres remain in balance when encountering images of positive or emotionally neutral scenes. The balance of activity shifts toward the right hemisphere when the image is one of horror, carnage, suffering, death, or injury—and it can become overwhelmed and dysfunctional. Watching images of disaster has a more powerful effect on one’s mental stability than reading about the disaster. (Restak, Richard, MD. The New Brain. p 71-74. PA: Rodale, 2003.)

All types of thinking utilize both hemispheres at the same time. The well-functioning brain is able to mix/match abilities for any learning situation. (Healy, Jane M., PhD.Endangered Minds. p 124-126. NY: Simon & Schuster, 1990.)