"Serotonergic neurons" refers to a specific group of cells in the brain that produce a chemical called serotonin. Serotonin is a neurotransmitter that helps regulate various processes in our bodies, including mood, sleep, appetite, and memory. So, when we talk about
serotonergic neurons, we are referring to the neurons that release serotonin and play a crucial role in controlling our emotions and behaviors.
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