Cognition and Related Terms

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cognition

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the ability to think logically and clearly.

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cognitive impairment

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the loss of ability to think logically and clearly.

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confusion

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the inability to think logically and clearly.

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delirium

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a state of severe confusion that occurs suddenly and is usually temporary.

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dementia

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a general term that refers to a serious, progressive loss of mental abilities such as thinking, remembering, reasoning, and communicating.

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progressive

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something that continually gets worse or deteriorates.

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degenerative

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something that continually gets worse.

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onset

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in medicine, the first appearance of the signs or symptoms of an illness.

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irreversible

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unable to be reversed or returned to the original state.

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Alzheimer’s disease

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a progressive, incurable disease that causes tangled nerve fibers and protein deposits to form in the brain, which eventually cause dementia.