discovered so far. central nervous systems received and processed stimuli from the external world individual neurons communicate with each other across gaps called synapses. synaptic communication or transmission works like this. neuron a emits messenger substances called neurotransmitters which bind to receptors in neuron b. . anesthetics such a problem mainly acted on the neurotransmitter gaba which dampens the signals. of all reinforces this dampening effect and thus prevents the neuron from sending out a signal. the damping occurs at several locations in the central nervous system. precisely which are