what is gaba neurotransmitter responsible for
Gamma-aminobutyric acid (GABA) is a neurotransmitter, a chemical that sends signals between cells in the brain. The GABA neurotransmitter is mainly responsible for inhibitory signals between neurons.It also controls muscle tone, inhibiting muscle contractions. Early in development, GABA plays a different role, acting as an excitatory neurotransmitter.hen the GABA neurotransmitter binds to a receptor in the central nervous system, it has an inhibitory effect on the neuron. The receptors receiving GABA will send signals that open gated ion channels in the cell.