Over a short time, the patient develops problems with attention that wanders and with orientation (especially to the environment), additional cognitive changes (memory, use of language, disorientation in other spheres, perception, visomotor capacity) set in. Severity fluctuates during the day. Usually caused by physical conditions, medications or other substances.
Major neurocognitive disorder
Evidence of a significant cognitive decline from previous level of performance in one or more cognitive domains based on-
- concern of individual, a knowledgeable informant, or clinician that there has been a significant decline in cognitive function
- Substantial impairment in cognitive performance, preferably documented by standard test
Cognitive deficit interfere with independence in everyday activities
Mild Neurocognitive disorder
a decline in cognitive functioning is modest and doesn't interfere with the ability to be independent.