According to the hypothesis, tricyclic antidepressants are believed to block the uptake of norepinephrine from the synaptic cleft.

I believe the answer is: catecholamine

This hypothesis view that pyschological disorder is a direct result of relative decrease in catecholamine that could usually be found at central adrenergic receptor sites because This reduction cause the function of hypothalamus part of our brain become significantly slower.

What area are in blue