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GABA

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GABA

Abbreviation for γ-aminobutyric acid.
Farlex Partner Medical Dictionary © Farlex 2012

GABA

abbr.
gamma-aminobutyric acid
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

GABA

γ-aminobutyric acid An amino acid that is the major inhibitory neurotransmitter in the vertebrate gray matter; it is excitatory in the hippocampus; GABAergic neurons are classified according to the direction of the cell processes, and signal transmitted/received. See Disinhibition, Stiff man syndrome.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

GABA

Abbreviation for gamma (γ)-aminobutyric acid.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

GABA

Gamma-aminobutyric acid. GABA is an inhibitory NEUROTRANSMITTER substance derived from glutamic acid that performs important dampening (inhibitory) functions in the brain. GABA helps to maintain a kind of balance in the nervous system by controlling excitatory information from other cells. GABA receptors on nerve cells are ligand-gated ion channels, that open to admit negatively-charged ions to the cell when GABA (the ligand) binds. This prevents nerve cells from producing an excitatory electrical signal. General anaesthetics are thought to function by increasing the function of GABA receptors. BENZODIAZEPINE drugs enhance the action of GABA. In PARKINSON'S DISEASE there is a considerable reduction in the number of GABA binding sites in the SUBSTANTIA NIGRA of the brain.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

GABA (gamma-aminobutyric acid)

A neurotransmitter that slows down the activity of nerve cells in the brain.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

neurotransmitter

A substance stored in the synaptic vesicles that is released when the axon terminal is excited by a nervous impulse. The substance then travels across the synaptic cleft to either excite or inhibit another neuron. This is accomplished by either decreasing the negativity of postsynaptic potentials (excitation), or increasing the negativity of postsynaptic potentials (inhibition). Common neurotransmitters include acetylcholine, dopamine, endorphins, adrenaline (epinephrine), gamma-aminobutyric acid (GABA), amino acids, such as glutamate and glycine, noradrenaline (norepinephrine), serotonin and substance P. Common neurotransmitters in the retina are glutamate (the primary excitatory neurotransmitter), GABA (inhibitory), glycine (inhibitory), dopamine (excitatory) and acetylcholine (excitatory). See neuron; synapse.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
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References in periodicals archive
Several studies have reported that propofol increases extrasynaptic GABA responses; thus, propofol exposure might affect GABA tonic current.[sup][11],[23] Propofol mediates a5-containing GABA[sub]AR, which is found at extrasynapses and co-assembled with [sz]3-containing GABA[sub]AR, which contributes to the “tail” kinetics of synaptic currents.[sup][24],[25] A previous study showed that the a5 GABA[sub]A receptor subunit can be assembled into synapses later during development and is responsible for the generation of a slow current.[sup][26] However, GABA tonic alteration after neonatal propofol exposure was not explored in this study and might need further study.
Every morning the control and the HS group were fed with 0.2 ml physiological saline and the GABA+HS group were fed with 0.2 ml of 0.5% GABA (Sigma St Louis MO USA).
Focal delivery with iontophoretic ejection from micropipettes revealed properties of GABA receptors on gastropod neurons.
GC procedures for GABA are based on the derivatization with heptafluorobutyric anhydride [23, 25], and isobutylchloroformate [24] with mass spectrometric or electrons capture detection systems.
Based on these findings, Patton and his student Mahesh Rao hypothesized that GABA might be involved in the zebrafish retina's regeneration response.
Despite this clear delineation, there are aspects in the discipline of poetry that Gaba brought to his art practice.
Longhurst, "GABA in nucleus tractus solitarius participates in electroacupuncture modulation of cardiopulmonary bradycardia reflex," American Journal of Physiology Regulatory, Integrative and Comparative Physiology, vol.
The researchers performed MRS exams on the addicted youth prior to and following behavioural therapy and a single MRS study on the control patients to measure levels of gamma aminobutyric acid, or GABA, a neurotransmitter in the brain that inhibits or slows down brain signals, and glutamate-glutamine (Glx), a neurotransmitter that causes neurons to become more electrically excited.
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