Cognition is a combination of mental processes that includes the ability to learn new things, intuition, judgment, language, and remembering. When cognition is impaired (cognitive impairment), a person has trouble with these processes which begins to affect the things they can do in everyday life. Cognitive impairment can occur at any age and can range from mild to severe. Cognitive impairment is not caused by any one disease or condition. Alzheimer’s disease and other dementias and conditions such as stroke and traumatic brain injury can cause cognitive impairment. Some causes of cognitive impairment are related to treatable health issues (e.g., medication side effects, vitamin B12 deficiency, and depression). (Adapted from the CDC).