substance P

a neuropeptide that functions as a neurotransmitter in both peripheral and central nervous systems. It belongs to the neurokinin family of transmitters. High concentrations of neurons containing substance P are localized in the dorsal horn of the spinal cord, where they play a role in the modulation of pain. In peripheral tissues, substance P acts as a vasodilator. It also has a role in sexual behavior and has been implicated in the regulation of mood.

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Psychology term of the day

November 21st 2024

ethnopsychopharmacology

n. the branch of pharmacology that studies ethnic and cultural variations in the use of and response to psychoactive agents across divergent groups, as well as the mechanisms responsible for such differences. —ethnopsychopharmacological adj.