Michael J. Prerau, PhD (IMAGE) Brigham and Women's Hospital Caption Michael J. Prerau, PhD, of the Division of Sleep and Circadian Disorders at Brigham and Women’s Hospital, is the senior author of a paper published in PNAS, “Individualized temporal patterns drive human sleep spindle timing.” Credit Brigham and Women's Hospital Usage Restrictions N/A License Original 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.