In this episode of I CARE FOR YOUR BRAIN with Dr. Sullivan, board certified neuropsychologist Dr. Karen D. Sullivan explains why we yawn, as the action begins in the brain stem and moves throughout the body opening the airway and stretching muscles. One may yawn from 9 to 30 times a day, and usually, a yawn lasts for about 5 seconds. Yawning starts in the womb and lessens as we age. Learn more at http://www.icfyb.com
