RT Journal Article SR Electronic T1 Pain: Its Physiology and Rationale for Management JF Physical Therapy JO Phys Ther FD American Physical Therapy Association SP 21 OP 23 VO 60 IS 1 A1 Bishop, Beverly YR 1980 UL http://jcore-reference.highwire.org/content/60/1/21.abstract AB The analgesic effects of morphine and other opiates have long been recognized, but the mechanisms underlying these effects have only recently been uncovered. First, opiate receptors were discovered and their distribution throughout the central nervous system mapped. Then endogenous morphine-like compounds, called endorphins and enkephalins, were identified. One of the most promising aspects of understanding the physiology and pharmacology of these endogenous opiates is conquering control over pain.