ABSTRACT
This chapter discusses the psycho physiological basis of the pain. The psycho or physiological bisection of pain has given way to the more reasonable view that every instance of pain is an intrinsically psycho physiological event. A serious difficulty with the pain receptor concept is that pain does not result from a single kind of physical stimulus in the way that vision is the result of light falling on the rods and cones. The 'Anzio Effect' refers to the observations made by Henry Beecher from the wounded soldiers during the World War II. The opposing fiber feature of the theory suggests that peripheral stimulation that selectively activates large sensory fibers should block pain. This prediction has kindled interest in electrical nerve stimulation as a method to control clinical pain. The narcotic analgesics, particularly morphine, codeine, and the synthetic opiate trade-named Demerol are the most potent pharmacological pain killers that are most.
