<prompt> The raphe nuclei located in lower pons and medulla secrete the following neurotransmitterNorepinphrineDopamineSerotoninAcetycholine  <response>: Serotonin is also found within the brain stem in the midline raphe nuclei which project to poions of hypothalamus, limbic system, neocoex, cerebellum and spinal cord. Ref: Ganong;s review of medical physiology; 23rd edition; pg: 136 