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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

December 23rd 2024

kinesthesis

kinesthesis

n. the sense that provides information through receptors in the muscles, tendons, and joints, enabling humans and other animals to control and coordinate their movements, including walking, talking, facial expressions, gestures, and posture. Also called kinesthesia; kinesthetic sense; movement sense. See proprioception. —kinesthetic adj.