Hypertension Hurts Brain Function in Young By Kathleen Doheny, HealthDay Reporter    Study finds hypertension erodes cognitive ability in those of all ages    HealthDayNews -- For years, experts have known that high blood pressure is related to poor cognitive performance in older adults and can lead to adverse changes in the brain.    Now, researchers report that young adults with high blood pressure are just as susceptible to decreased mental function as are older people are...