| Introduction
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| | Scientists do not yet fully understand
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| Alzheimer's disease is a progressive
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| | the causes of Alzheimer's disease. There
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| condition that damages areas of the brain
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| | probably is not one single cause, but
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| involved in intelligence, memory,
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| | several factors that affect each person
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| behavior, judgment, and language. It is
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| | differently.
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| the most common form of mental decline in
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| older adults. Alzheimer's gets worse over
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| | Recent studies indicate that amyloid
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| time, but the course of the disease
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| | beta protein may cause Alzheimer's
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| varies from person to person. Some people
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| | disease. In healthy people, this protein
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| may still be able to function relatively
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| | can cross the blood-brain barrier (the
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| well until late stages of Alzheimers
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| | wall of blood vessels that feed the brain
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| disease. Others may lose the ability to
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| | and regulate the entry and exit of brain
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| do daily activities in earlier stages.
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| | chemicals) and leave the brain. In people
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| Over time, Alzheimer's disease causes
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| | with Alzheimers disease, amyloid beta
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| severe mental and functional problems and
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| | protein can't pass through that barrier.
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| eventually results in death.
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| | As more amyloid beta protein accumulates
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| | in a person's brain, they become more and
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| Causes
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| | more mentally disabled.
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