Determine 
, where 
, 
.
Definitions:
Brain Changes
Alterations in the brain's structure, function, or chemical composition due to aging, experience, or injury.
Intellectual Ability
The capacity for thinking, reasoning, problem-solving, and acquiring knowledge.
Internal Medicine Doctor
A physician specializing in the diagnosis, treatment, and care of adults, focusing on internal organs and complex diseases.
Diagnosable Condition
A health issue that can be identified by medical professionals using established criteria.
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