Cognitive impairment refers to difficulties with cognitive functions such as memory, attention, language, and problem-solving. This can be caused by a variety of factors, including aging, neurological conditions such as Alzheimer's disease or traumatic brain injuries, or other medical conditions such as stroke or substance abuse. Cognitive impairment can have a significant impact on an individual's daily functioning and quality of life. Researchers in this area investigate the causes, progression, and treatment of cognitive impairment, as well as ways to support individuals with these challenges.