Find the centroid of the shaded region shown in the figure below. 
Definitions:
Monoamine Oxidase Inhibitors (MAOIs)
A class of antidepressant drugs that work by inhibiting the activity of monoamine oxidase, thereby increasing the levels of certain neurotransmitters in the brain.
Neurotransmitter Reuptake
The process by which neurotransmitters are reabsorbed by the nerve cell that released them, helping to terminate the signal between neurons.
Positron-Emission Tomography (PET)
A diagnostic imaging test using a specialized dye containing radioactive tracers to visualize and measure various bodily functions.
Gamma Waves
High-frequency brain waves associated with perception, problem-solving, and consciousness.
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