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Related to Neurotransmitters: serotonin, dopamine


A range of small-molecule chemical substances released by EXOCYTOSIS from a nerve ending on the arrival of a nerve impulse. Neurotransmitters are specific to particular neurons. They interacts with receptors on adjacent structures to trigger off a response, either excitatory or inhibitory. The adjacent structure may be another nerve, a muscle fibre or a gland. The main neurotransmitters are acetylcholine, glycine, glutamate, dopamine, noradrenaline, adrenaline, serotonin, histamine and GABA (gamma-amino-butyric acid). With the exception of the adrenalines all the neurotransmitters are AMINO ACIDS or derivatives of amino acids.


Chemicals within the nervous system that transmit information from or between nerve cells.
References in periodicals archive ?
Even if depression starts with a single abnormal neurotransmitter, things that happen afterward turn it into a multisystem disease, at least as far as serotonin and the hypothalamic-pituitary-adrenal axis are concerned," said Dr.
We rarely have enough change in tyrosine levels with normal food, but if you administer it alone, it can increase the production of neurotransmitters.
In a larger sense, the experiment suggests that neurotransmitters like serotonin play a dual role in pain - passing messages between individual nerve cells, but also modulating the general level of responsiveness of the entire system.
Neurotransmitters convert the electrical information into chemical information that can cross the synapse and stimulate or inhibit the next neuron (Hyman 2005).
An electrical signal causes the containers and membrane to fuse and the neurotransmitters flow from the nerve ending to be captured by other nerve cells.
Receptor: A protein usually found on the surface of a neuron or other cell that recognizes and binds to neurotransmitters or other chemical messengers.
Serotonin (5-HT): Reduced levels of this neurotransmitter within the brain are associated with feelings of depression, aggression, irritability, anxiety and despair.
The effect of polychlorinated biphenyls on the uptake of dopamine and other neurotransmitters into rat brain synaptic vesicles.
Inhibition of reuptae allows buildup of neurotransmitters in the synapse and activation of the auto-receptors, leading to a decrease in firing activity, said Dr Blier.
Serotonin, famed as the target of Prozac and other antidepressants, acts as a neurotransmitter, relaying signals from one brain cell to the next.

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