<P> The neurons of the raphe nuclei are the principal source of 5 - HT release in the brain . There are nine raphe nuclei , designated B1 - B9 , which contain the majority of serotonin - containing neurons ( some scientists chose to group the nuclei raphes lineares into one nucleus ) , all of which are located along the midline of the brainstem , and centered on the reticular formation . Axons from the neurons of the raphe nuclei form a neurotransmitter system reaching almost every part of the central nervous system . Axons of neurons in the lower raphe nuclei terminate in the cerebellum and spinal cord , while the axons of the higher nuclei spread out in the entire brain . </P>
<P> The neurons of the raphe nuclei are the principal source of 5 - HT release in the brain . There are nine raphe nuclei , designated B1 - B9 , which contain the majority of serotonin - containing neurons ( some scientists chose to group the nuclei raphes lineares into one nucleus ) , all of which are located along the midline of the brainstem , and centered on the reticular formation . Axons from the neurons of the raphe nuclei form a neurotransmitter system reaching almost every part of the central nervous system . Axons of neurons in the lower raphe nuclei terminate in the cerebellum and spinal cord , while the axons of the higher nuclei spread out in the entire brain . </P>
where is serotonin released from in the brain
where is serotonin released from in the brain
neurons of the raphe nuclei
neurons of the raphe nuclei