Capsaicin

Definition

Capsaicin is a chemical compound found in chili peppers that triggers a sensation of heat or burning when it comes into contact with the sensory receptors in the skin. In the context of the somatic nervous system, it specifically activates the pain and temperature receptors, contributing to sensory perception.

Related terms

Nociceptors:

Sensory receptors that detect signals from damaged tissue and perceive pain, which capsaicin activates.

Substance P: A neuropeptide involved in the transmission of pain and other sensory messages to the brain, released upon activation by compounds like capsaicin.

Thermoreceptors: Specialized neurons that detect changes in temperature, which are also sensitive to capsaicin-induced sensations of heat