Effects of pain-attenuating brain stimulation and morphine on electrical activity in the raphe nuclei of the awake rat. Citation: (Oleson 1977, 211-230)

Behavioral aspects in the response by rats to noxious shock and pinch as well as innocuous air puffs were recorded in the dorsal raphe, median raphe and raphe magnus nuclei of awake rats. When electrical stimulation was applied to midbrain central gray and of medial thalamus, as well as systemic administration of morphine, all behavioral and electrophysiological responses to noxious stimuli were greatly diminished (without reliably affecting responses to air puffs). At the same time that brai...