Sacks spoke on his experience working with patients who suffered from sleeping sickness, aphasias and Alzheimer's disease. Music "survives amnesia, dementia and much else," Sacks contended. It plays a part in their therapy and can even help patients with advanced Alzheimer's.
According to Sacks, aphasia patients can partially recover through "music intonation therapy" because the parts of the brain responsible for musical perception reside in close proximity to those responsible for memory.
Sacks quoted an Alzheimer's suffering patient's relative: "Music is one of the only things that keeps him grounded in the world."