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Fabrizio Benedetti
Fabrizio Benedetti is professor of physiology and neuroscience at the University of Turin Medical School in Turin, Italy.〔(【引用サイトリンク】 title=Turin Research Group )〕 He is known for his research into the placebo and nocebo effects.
==Placebo and nocebo research==
Benedetti began studying placebos in the 1990s while researching pain. His research has found that "the promise of treatment activates areas of the brain involved in weighing the significance of events and the seriousness of threats."〔 Another of Benedetti's studies examined the effectiveness of placebos in the treatment of Parkinson's disease, and the effect of this treatment on neurons that control movement. He found that giving these patients a placebo led to a decrease in the rate at which these neurons fired of about 40%, and that this enabled the patients to move more easily. In 2007, Benedetti published a study in which he and his co-authors gave subjects morphine during a hand-squeezing exercise, and later replaced the morphine with a placebo without the subjects' knowledge. In this study, the subjects who received morphine and then a placebo endured significantly more pain than did patients in any of the control groups. In a 2011 paper, Benedetti and co-authors argued that there exist many different placebo effects, "with different mechanisms and in different diseases, systems, and therapeutic interventions."
He has also published research on the nocebo effect; in some of these studies, he found that cholecystokinin is responsible for the transmission of pain by the nocebo effect. This research also found that drugs used to block this chemical, such as proglumide, can also stop nocebo pain. Another of Benedetti's studies found that when individuals were told about a possible link between high altitudes and headaches, it led to an enhancement of the cyclooxygenase-prostaglandin pathway in those individuals, and that they developed significantly more headaches than the control group did.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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