dorsal raphe nucleus


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dorsal raphe nucleus

A midbrain nucleus that lies in the midline in the tegmentum, below the periaqueductal gray. It sends serotonergic axons to the striatum via the medial forebrain bundle, and it receives axons from the interpeduncular nucleus.
See: raphe nucleus
See also: nucleus
References in periodicals archive ?
A reward pathway in the dorsal raphe nucleus important to drug abuse begins with stimulation of glutamate neurons, according to a study from the National Institutes of Health.
Dopamine may still have a key role, the researchers noted, which is why they were surprised to find harmful effects of stress converging in a brain region- the dorsal raphe nucleus --where nerve cells that use serotonin, a chemical nerve signal that has been associated with wake and sleep cycles, mood, anger, status and aggression, are abundant.