<prompt> The cell bodies of orexinergic neurons are present inLocus ceruleusDorsal rapheLateral hypothalamic areaHippocampus  <response>: Brains from humans with narcolepsy often contain fewer hypocretin orexin producing neurons in the hypothalamus. hypothalamic neurons release orexin to play a role inswitching between sleep and wakefulness Ganongs review of medical physiology;26rd edition;pg:268,273 