Psychiatry is the branch of science that does what?
The field of neuroscience encompasses all approaches that seek to understand the brain and the rest of the nervous system. Psychology seeks to understand mind and behavior, and neurology is the medical discipline that diagnoses and treats diseases of the nervous system. The brain is also the most important organ studied in psychiatry, the branch of medicine that works to study, prevent, and treat mental disorders. Cognitive science seeks to unify neuroscience and psychology with other fields that concern themselves with the brain, such as computer science (artificial intelligence and similar fields) and philosophy.
The College of Arts and Letters was established as the university's first college in 1842 with the first degrees given in 1849. The university's first academic curriculum was modeled after the Jesuit Ratio Studiorum from Saint Louis University. Today the college, housed in O'Shaughnessy Hall, includes 20 departments in the areas of fine arts, humanities, and social sciences, and awards Bachelor of Arts (B.A.) degrees in 33 majors, making it the largest of the university's colleges. There are around 2,500 undergraduates and 750 graduates enrolled in the college.