The Science of Laughter and Its Physical, Cognitive, and Emotional Power By Janet M. Gibson , Professor of Cognitive Psychology, Grinnell College Amusement and pleasant surprises – and the laughter they can trigger – add texture to the fabric of daily life. Those giggles and guffaws can seem like just silly throwaways. But laughter, in response to funny events, actually takes a lot of work, because it activates many areas of the brain : areas that control motor, emotional, cognitive, and social processing. Researchers now appreciate laughter’s power to enhance physical and mental well-being. Physically -People begin laughing in infancy, when it helps develop muscles and upper body strength . Laughter is not just breathing. It relies on complex combinations of facial muscles, often involving movement of the eyes, head, and shoulders. Cognitively - A good sense of humor and the laughter that follows depend on an ample measure of social intellige...