Complex sentence: Neurological Institute of New York was founded in 1909 as the first hospital and research center in the Western Hemisphere devoted solely to neurological disorders, the institute became an affiliate of the Medical Center in 1925 and merged with the Presbyterian Hospital in 1943.
Split into simpler sentences: Neurological Institute of New York was founded in 1909 as the first hospital and research center in the Western Hemisphere devoted solely to neurological disorders. The institute became an affiliate of the Medical Center in 1925 and merged with the Presbyterian Hospital in 1943.