raphe nucleus

a group of serotonergic neurons in the midline of the brainstem that project widely to the spinal cord, thalamus, basal ganglia, and cerebral cortex. Raphe nuclei are involved in alertness and sleep–wake states. Also called nucleus of the raphe; raphe.

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Psychology term of the day

November 24th 2024

psychomimic syndrome

a condition in which an individual who lacks physical evidence of an illness develops symptoms of an illness experienced by another person, who may have died of the disorder. The symptoms usually occur around the anniversary of the death of the other person. See also anniversary reaction.