Author: Sarah Chellappa

Sarah L. Chellappa, MD., MPH., PhD., is an Alexander Von Humboldt Experienced Fellow at the Department of Nuclear Medicine, University of Cologne, Germany. Dr. Chellappa´s work has shown that sleep and circadian rhythms affect mood, cognition and brain activity in a variety of human populations, including young and older adults, shift workers, patients with depression, with ocular diseases and with neurodegeneration. Her work combines multimodal neuroimaging approaches to assess how sleep and circadian rhythms affect brain activity that modulate mood and cognition. Her work also includes sleep/circadian interventions (e.g., light therapy, meal timing) to help improve mood, health and well-being.