Mesolimbic dopaminergic and serotonergic pathways.
Dopaminergic pathways, sometimes called dopaminergic projections, are neural pathways in the brain that transmit the neurotransmitter dopamine from one region of the brain to another.
The neurons of the dopaminergic pathways have axons that run the entire length of the pathway. The neurons' somata produce the enzymes that synthesize dopamine, and they are then transmitted via the projecting axons to their synaptic destinations, where most of the dopamine is produced. Dopaminergic nerve cell bodies in such areas as the substantia nigra tend to be pigmented due to the presence of the black pigment melanin.
The mesocortical pathway transmits dopamine from the VTA to the frontal cortex. The "meso" prefix in "mesocortical" refers to the VTA, which is located in the midbrain, and "cortical" refers to the cortex.
The tuberoinfundibular pathway transmits dopamine from the hypothalamus to the pituitary gland. This pathway influences the secretion of certain hormones, including prolactin. "Infundibular" in the word "tuberoinfundibular" refers to the cup or infundibulum, out of which the pituitary gland develops.
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