Research has found that using dance movements as a form of therapy activates several brain functions at once: kinesthetic, rational, musical, and emotional. This type of movement requires mental, physical, and emotional strength to work simultaneously. In one research study, senior citizens were placed in a 21-year study to see if any physical or cognitive recreational activity influenced mental acuity. Researchers monitored rates of dementia in the elderly participants. The study included cognitive activities such as reading books, doing crossword puzzles, and playing musical instruments and physical activities such as golf, walking for exercise, and dancing. Results showed that almost none of the physical activities appeared to offer any defense against dementia. The activity with the highest percentage of protection against dementia was dancing frequently (76%). It was the greatest risk reduction of any activity studied, cognitive or physical. This is because dance therapy combines multiple areas of the brain to work together at once rather than just stimulating one area at a time.