Psychology Definition of GABAA RECEPTOR: The other GABA receptor found at synapses of neurons. The net effect of GABA, however, is not always inhibitory. GABA receptors GABA is an inhibitory neurotransmitter that plays an important role in regulating dopamine and glutamate neurotransmission. It … 1 sensory and 1 motor neuron communicating through 1 interneuron in the spine. gamma-aminobutyric acid. See more. GABA is available as a supplement but most medical professionals … It is the predominant inhibitory receptor in the central nervous system. GABA can decrease the likelihood that action potentials will occur, and thus decreases neuronal signaling. Gaba definition, a neurotransmitter of the central nervous system that inhibits excitatory responses. What You Need to Know for the AP® Psychology Exam Biological bases of behavior, including the function and types of neurotransmitters, make up about 8-10% of the total exam. Glutamate. See Disinhibition, Stiff man syndrome. Like serotonin, norepinephrine, and dopamine, GABA is not directly available in food. GABA (gamma-aminobutyric acid) is an inhibitory neurotransmitter in the brain. Definition Controled by CNS, is an automatic responses to stimuli. gamma-Aminobutyric acid, or γ-aminobutyric acid / ˈ É¡ æ m ə ə ˈ m iː n oʊ b juː ˈ t ɪr ɪ k ˈ æ s ɪ d /, or GABA / ˈ É¡ æ b ə /, is the chief inhibitory neurotransmitter in the developmentally mature mammalian central nervous system.Its principal role is reducing neuronal excitability throughout the nervous system.. GABA is sold as a dietary supplement in many countries. GABA is considered the primary inhibitory neurotransmitter in the nervous system. ~ - The main inhibitory neurotransmitter in the brain. Although it plays a vital role in learning, memory, and brain development, too much glutamate can be toxic. Glutamate is an amino acid that acts as a neurotransmitter.Glutamate sends chemical messages in the brain by “exciting” neurons that are sensitive to it. Also deals with pain. 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. But the amino acid, glutamine, is present in food and converts to GABA. Learn Learn how increased levels of GABA impact the brain and body. GABA (gamma-aminobutyric acid) is one of the body’s most calming neurotransmitters and plays a powerful role in anxiety and depression. GABA is a neurotransmitter that plays an important role in behavior, cognition, and the body's response to stress. [68] It was found that patients with bipolar disorder had lower GABA levels, which results in excitotoxicity and can cause apoptosis (cell loss). GABA limits nerve transmission, which inhibits (prevents) nervous activity. Gamma-amino butyric acid (GABA) is an amino acid in the body that acts as a neurotransmitter in the central nervous system.