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Chemical messengers

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Neurotransmitters are the chemical messengers of the body, transmitting impulses from one nerve cell to another. The first neurotransmitter was discovered in 1921 by Otto Loewi, which earned him The Nobel Prize in Physiology or Medicine in 1936. Many different types of neurotransmitters are known today, and imbalances associated with these small molecules have been blamed for a range of disorders of the nervous system.

The images below feature three examples of neurotransmitters: serotonin, dopamine, and epinephrine, also known as adrenaline.


Birgit Reinert

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