This special issue follows two previous special issues on music and neurological disorders (April 2008, Volume 23/Issue 4 and April 2010, Volume 25/Issue 4). Like its predecessors, the issue presents studies employing a patient-based approach to music perception, cognition, and emotion. Whereas the earlier issues dealt with acquired and congenital disorders and impairments, the present issue focuses on dementia, primarily on its most common form, Alzheimer's disease (AD).