<prompt> Excitatory neurotransmitter of brain is?GABAAspartateGlutamateGlycine  <response>: Ans. C Glutamate The most prevalent transmitter is glutamate, which is excitatory at well over 90 of the synapses in the human brain. The next most prevalent is Gamma-Aminobutyric Acid, or GABA, which is inhibitory at synapses in the human brain. 