Dopamine is a phenethylamine naturally produced by the human body. In the mind, dopamine functions as a neurotransmitter, activating the 5 types of dopamine receptor -- D1, D2, D3, D4 and D5, and their variants. Dopamine is produced in a number of areas of the brain, together with the substantia nigra. Dopamine can also be a neurohormone released by the hypothalamus. Its principal operate as a hormone is to inhibit the release of prolactin from the anterior lobe of the pituitary. Dopamine will be supplied as a medication that acts on the sympathetic nervous system, producing effects resembling elevated heart rate and blood pressure. However, since dopamine can't cross the blood-brain barrier, dopamine given as a drug doesn't immediately have an effect on the central nervous system. To increase the quantity of dopamine in the brains of patients with diseases such as Parkinson's illness and Dopa-Responsive Dystonia, L-DOPA (levodopa), which is the precursor of dopamine, can be given because it may possibly cross the blood-brain barrier. This e-book presents new research in the field.
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