As a student Professor Morrell developed an interest in the control of breathing during sleep which continues to drive her research at the National Heart and Lung Institute, Imperial College London.
Professor Morrell’s research focuses on the causes and consequences of sleep disordered breathing; particularly the impact of intermittent hypoxia on the brain. Her aim is to translate physiological research into improvements in patient care. Recently, she developed a UK respiratory-sleep network facilitating multi-center trials. The network has previously completed a trial to determine the impact of treating OSA in older people, and is currently investigating mild OSA. Mary has served on the American Thoracic Society Board of Directors, the Physiological Society Executive Board and she is a Past-President of the British Sleep Society.