"The sensory processes which result, in man, in the perception of pain following a noxious, or damaging, stimulus." Electrical or chemical activity in sensory neurons and receptors, which can be measured. (B322.2.w2)

"the evoked response to a specific tissue stimulation from mechanical, thermal or chemical irritation applied to receptors on the nerve endings." (J288.59.w1)

- "the detection of a noxious stimulus and the transmission of that information to the brain. Pain is the perception of the sensual experience induced by a noxious stimulus." (J4.219.w4)

Compare with:

• Pain

• Nociceptive (Adjective)