ABSTRACT
Central hypersensitive syndrome is a group disorders with no paraclinic tests to be diagnosed and Fibromyalgia is at top of them. Goal of this study is not only application of opponens pollicis H-Reflex recording as auxiliary paraclinic test for of Fibromyalgia although emphasis on hypercentralization as its probable cause. In this case-control study 30 patients of Fibromyalgia was referred to Physical Medicine and Rehabilitation of Emam reaza and Milad Hospital and 30 healthy subjects were investigated for obtaining H-Reflex of opponens pollicis muscles. Other measure parameters include: Intensity of stimulation and amplitude of H-Reflex. H-Reflex obtaining of opponens pollicis in patients suffer from Fibromyalgia was significant [P-value>0.05]. Besides intensity of stimulation is significantly lower in Fibromyalgia but amplitude comparison of both groups did not show significant change. H-reflex recording opponens pollicis is possible in patients of Fibromyalgia