Disposition, especially among older individuals with disabilities (dementia) or held in institutions, to feel lower level of mental function later in the day. As the sun sets, there is a reduction in mental activity, this is sundown syndrome.

SUNDOWN SYNDROME: "Example: Sundown syndrome is noticed in some people who have Alzheimer disease."
Cite this page: N., Pam M.S., "SUNDOWN SYNDROME," in, April 13, 2013, (accessed October 20, 2021).