A variant of nociceptive pain (pain resulting from ongoing activation of primary afferent neurons by noxious stimuli), epicritic pain is transmitted to the spinal cord by A Delta (δ) fibers. These fibers are sparsely myelinated, large-diameter, and fast-conducting, which transmit sharp, well-localized pain. A δ fibers are mostly sensitive to mechanical and thermal stimuli. Epicritic pain is less responsive to opioid therapy than is protopathic pain.
References and Readings
- McCaffery, M., & Pasero, C. (1999). Pain clinical manual (2nd ed.). St. Louis: Mosby.Google Scholar