menti-, ment-

Dementia of Alzheimer disease developing before age 65.

A severe form of depression resulting from a progressive brain disorder in which cognitive changes mimic those of dementia.

A depressive disorder is a syndrome (group of symptoms) that reflects a sad mood exceeding normal sadness or grief. More specifically, the sadness of depression is characterized by a greater intensity and duration and by more severe symptoms and functional disabilities than is normal.

Depression symptoms are characterized not only by negative thoughts, moods, and behaviors, but also by specific changes in bodily functions; for example, irregular eating, sleeping, crying spells, and decreased libido.

The functional changes of clinical depression are often called "neurovegetative signs". This means that the nervous system changes in the brain cause many physical results that result in diminished activity and participation.

A form of brain disorder marked by unusually accelerated and progressive, irreversible mental deterioration: Senile dementia is often associated with declining people who appear to experience memory loss, forgetfulness, and disorientation.

Chronic brain disorder with the loss of intellectual functioning resulting from a severe cerebral injury.

A common form of dementia in older persons that is due to cerebrovascular disease, usually with step-by-step deterioration from a series of small strokes and a patchy distribution of neurologic deficits affecting some functions and not others.

Risk factors include high blood pressure, an unsteady way of walking, and advanced age.

Symptoms include confusion, problems with recent memory, wandering or getting lost in familiar places, loss of bladder or bowel control (incontinence), emotional problems; such as, laughing or crying inappropriately, difficulty following instructions, and problems handling money.