MCAT® ExamPsychological, Social, and Biological Foundations of BehaviorMedium
An elderly patient with widespread cerebral atrophy is evaluated for cognitive decline. Neuropsychological testing reveals significant deficits in executive functions, including planning, problem-solving, and working memory, but relatively preserved long-term memory for remote events and procedural skills. This pattern of cognitive impairment is most characteristic of damage to which of the following brain regions?
- ACerebellum
- BPrefrontal cortex
- CAmygdala
- DHippocampus
Show answer & explanationAnswer & explanation
Correct answer: B. Prefrontal cortex
The prefrontal cortex is critically involved in executive functions such as planning, decision-making, working memory, and impulse control. Damage or atrophy in this area would lead to the described pattern of deficits.
Why the other options are wrong
- A. The cerebellum is primarily involved in motor control, balance, and coordination, with some roles in cognitive processing, but not the specific executive functions mentioned.
- C. The amygdala is primarily involved in processing emotions, especially fear, and emotional memory, not executive functions.
- D. The hippocampus is crucial for the formation of new long-term memories (declarative memory), but damage would primarily affect recent memory and learning, not executive functions as described.
Prefrontal Cortex Function
The anterior part of the frontal lobe, responsible for complex cognitive behaviors, decision-making, social behavior, and moderating social conduct.
- Crucial for executive functions (planning, problem-solving).
- Involved in working memory and attention.
- Plays a role in personality expression and social behavior.
Memory trick: Frontal's Focus: Future, Function, Freedom (of thought).