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Antinociception from the administration of β-endorphin into the periaqueductal gray of rat is enhanced while that of morphine is inhibited by barbiturate anesthesia

Barbiturate AnesthesiaHealth SciencesAnesthetic PharmacologyNeurophysiologyPain MedicineMedicineBehavioral PharmacologyAnesthetic MechanismNeuropharmacologyPain ManagementNeuroscienceAnalgesiaAnesthesiaPharmacologyPeriaqueductal GrayAnalgesicsAnesthesiologyPain Research