Sharon Straus, St. Michael's Hospital (IMAGE) St. Michael's Hospital Caption Dr. Sharon Straus, a gerontologist and head of knowledge translation at St. Michael's Hospital in Toronto, is the co-author of a study that found cognitive enhancers -- drugs taken to enhance concentration, memory, alertness and moods -- do not improve cognition or function in people with mild cognitive impairment in the long term. Credit St. Michael's Hospital Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.