Final answer:
A person who has difficulties with memory and thinking that do not prevent independent living is likely experiencing a minor neurocognitive disorder or Mild Cognitive Impairment (MCI). It is less severe than a major neurocognitive disorder and typically does not interfere with daily living, unlike more advanced stages of diseases like Alzheimer's or Parkinson's.
Step-by-step explanation:
The person who has difficulties with memory and thinking yet does not have impairments that prevent independent living is likely to be affected by a minor neurocognitive disorder. This condition falls between the normal aging process and more severe neurodegenerative diseases, such as dementia. Minor neurocognitive disorder, also known as Mild Cognitive Impairment (MCI), is characterized by noticeable cognitive decline but not to the extent that it significantly interferes with daily activities and independence.
Major neurocognitive disorder, on the other hand, involves significant cognitive decline that does interfere with independence in daily activities. This could include conditions such as advanced Alzheimer's disease or other dementias. Parkinson's disease is primarily known for its motor symptoms, such as tremors, slowed movement, and rigidity, but it can also lead to neurocognitive issues, including dementia, in more advanced stages.