According to a new research, conducted by the University of Texas, and the Cognitive Research Unit, chewing gum has a positive effect on thinking, memory and other important tasks.

"The results were extremely clear and specifically we found that chewing gum// targeted memory," Andrew Scholey of the university's Human Cognitive Neuroscience Unit said. "People recalled more words and performed better in tests on working memory." Peppermint gum, menthol or spearmint--it makes no difference. The main key is the repetitive chewing motion.

Scholey, who was to present his findings to a symposium at the British Psychological Society's annual conference in Blackpool Wednesday, said the improved performance in a range of memory tests could be attributed to an increase in heart rate coupled with a surge in insulin to the brain. The experiments involved 60 people split into groups of non-chewers, real chewers and "sham" chewers.

Prior to undergoing the 20-minute test, the two chewing groups spent 3 minutes working their real or imaginary gum around their mouths. Scholey said the tests included questions relating to short-term memory, such as recalling words and pictures, and so-called working memory, for example the ability to retain a person's telephone number. He said the heart rate of the real chewers after the tests was three beats per minute faster than the non-chewers, and 1.5 beats per minute faster than the sham chewers.

"What we think is that the mild increase in heart rate may improve the delivery of oxygen and glucose to the brain, enough to improve cognitive function," he told Reuters. Scholey added the other possibility was that chewing gum induced a surge of insulin due to the mouth watering in anticipation of a meal.


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