Gamma aminobutyric acid is an important amino acid which functions as the most prevalent inhibitory neurotransmitter in the central nervous system.

Gamma aminobutyric acid works in partnership with a derivative of Vitamin B-6, pyridoxine, to cross from the axons to the dendrites through the synaptic cleft, in response to an electrical signal in the neuron and inhibits message transmission. This helps control the nerve cells from firing too fast, which would overload the system.

The action of gamma aminobutyric acid decreases epileptic seizures and muscle spasms by inhibiting electrical signals in this manner. Studies have shown that the site of action in the brain of benzodiazepams, including Valium, is directly coupled to the brain receptor for gamma aminobutyric acid.

Studies by Chinese Academy of Sciences show that when people get older the amount of gamma aminobutyric acid in the CNS get smaller, thus causes the noises in the brain, weakening the signal transmission of the neurons. This causes the hearing and eye vision of older people become weaker.

More ... (from Pubmed)
Source:

1. OMD, (05 Jan 1998)

2. Partially translated from  http://www.cas.ac.cn/html/Dir/2003/05/21/3702.htm

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