Premise: Neuromodulation . Major neuromodulators in the central nervous system include dopamine , serotonin , acetylcholine , histamine , and norepinephrine . Norepinephrine ( NE ) , also called noradrenaline ( NA ) or noradrenalin , is an organic chemical in the catecholamine family that functions in the brain and body as a hormone and neurotransmitter . Outside the brain , norepinephrine is used as a neurotransmitter by sympathetic ganglia located near the spinal cord or in the abdomen , and it is also released directly into the bloodstream by the adrenal glands . Norepinephrine (medication) . It is the same molecule as the hormone and neurotransmitter norepinephrine .
Hypothesis: Norepinephrine prevents neuromodulation.
Label: NEUTRAL