Just Breathe 101 Diaphragm in Critical Care for Physical Therapists and Occupational Therapists is a specific course dealing with the diaphragm in a critical care setting. This course goes into detail on the anatomy and physiology of the diaphragm as it relates to injury and illness. It goes into detail on how the diaphragm responds to critical care situations and ventilation. Multiple current studies are reviewed and suggestions are made for approaches to care.