From Citizendium, the Citizens' Compendium
- Neurologic manifestation : Clinical signs and symptoms caused by nervous system injury or dysfunction.
- Cognition : The central nervous system's processing of information relevant to interacting with itself and its internal and external environment.
- Dementia : Progressive decline in two or more cognitive domains that is severe enough to interfere with the performance of everyday activities.
- Geriatrics : "the branch of medicine concerned with the physiological and pathological aspects of the aged, including the clinical problems of senescence and senility."(National Library of Medicine)