The neurotransmitter dopamine has been widely implicated in a variety of neuronal functions, including brain mechanisms of reward, evaluation of environmental stimuli, general behavioral activity levels, and disorders such as Parkinson’s disease and schizophrenia (Brunton et al. 2005; Kandel et al. 2000). Considering that dopamine is made by very few cells in the brain and acts mainly within a subset of brain regions (see figure 5A), this neurotransmitter seems to have a disproportionately large impact on brain function.
Dopamine AND Serotonin
Figure 5. Neurotransmitters with discrete localization within the brain. A) The chemical structure of the monoamine neurotransmitter dopamine and a schematic drawing of the localization of dopamine-containing neurons in the human and rat brain and the sites where dopamine-containing axons are found. B) The chemical structure of the monoamine neurotransmitter serotonin and similar brain map showing locations of serotonin-containing cells and their axons.
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