An age-related, non-reversible brain disorder that develops over a period of years. Initially, people experience memory loss and confusion, which may be mistaken for the kinds of memory changes that are sometimes associated with normal aging. The symptoms gradually lead to behaviour and personality changes, a decline in cognitive abilities such as decision-making and language skills and problems recognizing family and friends; and ultimately to a severe loss of mental function. Alzheimer's disease is one of a group of disorders called dementias that are characterized by cognitive and behavioural problems. It is the most common cause of dementia among people age 65 and older.
A syndrome, also known as Lou Gehrig's disease, that is marked by muscular weakness and atrophy with spasticity and increased action of the reflexes due to degeneration of the motor neurons of the spinal cord, medulla and cortex.
An inherited disease of the central nervous system which usually has its onset in people age 25 to 55. The individual has progressive dementia with bizarre involuntary muscular twitching of the limbs or facial muscles. The posture is abnormal. The disease slowly progresses and death is usually due to an intercurrent infection.
A chronic, slowly progressive disease of the central nervous system in which the myelin sheath which covers the nerves hardens, resulting in difficulties with muscle control, involuntary movements of the eyeballs, speech problems and tremor. Multiple sclerosis is marked by a history of remissions and exacerbations.
One of a group of conditions called motor system disorders which result from loss of dopamine-producing brain cells. Symptoms of PD include tremor (trembling in hands, arms, legs, jaw, and face), rigidity (stiffness of the limbs and trunk); bradykinesia (slowness of movement) and postural instability (impaired balance and coordination). As these symptoms become more pronounced, patients may have difficulty walking, talking, or completing other simple tasks. The disease usually affects people over the age of 50, can be difficult to diagnose accurately and may require brain scans or laboratory tests to rule out other conditions.
A sudden loss of consciousness followed by paralysis which is caused by hemorrhage into the brain, formulation of a blood clot or mass of undissolved matter in the blood that occludes an artery, or rupture of an extracerebral artery causing hemorrhaging in the membranes which enclose the brain and spinal cord.
The above terms and definitions are part of the Taxonomy of Human Services, used here by permission of INFO LINE of Los Angeles.