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Effects of OFQ/N on light-induced phase shifts.A, Actographs showing that injection of OFQ/N 10 min before a 10 min light exposure at CT19 reduced the phase shift induced by the light pulses. B, Dose-dependent effect of local administration of OFQ/N on the light-induced phase shifts. Data represent the means ± SD, and the number of determinations are indicated within each bar.OFQ, Orphanin-FQ/nociceptin.
