The word "serotonergic" refers to something that affects or relates to serotonin, which is a chemical substance in our brain that helps regulate our mood, sleep, appetite, and other important functions. Full definition
Abnormalities of the brainstem serotonergic system in the sudden infant death syndrome: A review. (lactationlink.com)
Pcdh - α gene expression during rodent neural development is highest in early postnatal life (until PD21), when it is involved in specifying the innervation of serotonergic neurons in the hippocampus [39]. (journals.plos.org)
Because of this, researchers can look for the same molecular signatures in human tissue and begin to tease apart whether particular subtypes of serotonergic neurons are involved in conditions such as sudden infant death syndrome (SIDS) or autism. (sciencedaily.com)