Any of a variety of conditions that are characterized by significant impairment of brain tissue and resultant loss of brain function including degenerative illnesses (e.g., Alzheimer's disease, multiple sclerosis, Parkinson's disease, stroke and other cerebrovascular accidents), genetic variations or mutations that affect the development and functioning of the brain either in utero or following birth, traumatic brain injury, post infection damage, brain tumours, and permanent damage that occurs as a result of seizures, substance toxicity or other disorders as well as conditions affecting the brain that are present prior to birth.
A rare brain disorder that causes serious and progressive problems with control of gait and balance, along with complex eye movement and thinking problems. One of the classic signs of the disease is an inability to aim the eyes properly, which occurs because of lesions in the area of the brain that coordinates eye movements. Some individuals describe this effect as a blurring. Affected individuals often show alterations of mood and behaviour, including depression and apathy as well as progressive mild dementia.
The above terms and definitions are part of the Taxonomy of Human Services, used here by permission of INFO LINE of Los Angeles.