MCI is not a form of dementia and is not as severe as dementia. However, it can increase a person's chances of developing dementia later in life; about 15% of people with mild cognitive impairment progress to dementia. There are two types of mild cognitive impairment: amnestic MCI, which is specific to memory and causes issues such as misplacing one's keys, and non-amnestic MCI, which leads to other changes in brain activity such as a reduced attention span.
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