长期以来,人们以为疼痛感知觉是对伤害性刺激信息的机械性的、镜面似的反映。然而现在看来疼痛是“外在”信息与“内在”信息相互作用的结果。机体对疼痛感觉的调制疼痛感觉的目的是保证机体能够反映伤害性刺激。但刺激微弱时,要调节感觉机能,使它更灵敏一些或具备感觉累积激发的能力。当刺激较强且过长时,必需有 For a long time, people think that pain perception is a mechanical, mirror-like reflection of noxious stimulus messages. However, it now appears that pain is the result of an interaction between the “extrinsic” message and the “intrinsic” message. The body’s modulation of the pain sensation The purpose of the pain sensation is to ensure that the body reflects the noxious stimuli. However, when the stimulus is weak, it is necessary to adjust the sensory function, making it more sensitive or have the ability to stimulate the cumulative feeling. When the stimulus is strong and too long, it is necessary