John Abercrombie (1780-1844) was a Scottish physician and author known for his contributions to medical literature. He is best recognized for his work in the field of psychiatry and for his writings on the relationship between mental and physical health. His influential book, "Pathological and Practical Researches on the Diseases of the Brain," helped advance the understanding of mental disorders during his time. Abercrombie also served as a professor of the practice of medicine at the University of Edinburgh. His research and teachings laid the groundwork for future studies in neurology and psychology, making him a significant figure in the history of medicine.