Dr. Casey's work primarily focuses on the intersection of aging and mental health. His specific research and professional interests include:

• Alzheimer’s Disease and Dementias: Investigating the diagnosis, treatment, and management of cognitive decline.
• Geriatric Depression: Studying mood disorders specifically as they affect the elderly population.
• Psychiatric Education: Researching and developing methods for training the next generation of psychiatrists.
• History of Psychiatry: Dr. Casey has lectured and published on the historical evolution of psychiatric practice and thought.