Find the critical number(s) , if any, of the function 
Definitions:
Prefrontal Area
A region at the front of the frontal lobe in the brain, associated with complex cognitive behavior, personality expression, and decision making.
Memory
Capacity of the brain to store and retrieve information about past sensations and perceptions; essential to learning.
Peripheral Nervous System
The part of the nervous system that consists of the nerves and ganglia outside of the brain and spinal cord.
Sensory Messages
Signals transmitted by sensory receptors to the brain or spinal cord, conveying information about the environment.
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