Inhibitory neurotransmitters neurotransmitters communicate signals neurotransmitters neurotransmitters Neurogistics neurotransmitters neurotransmitters neurotransmitters neurotransmitters neurotransmitters neurotransmitters neurotransmitters Inhibitory neurotransmitters neurotransmitters Excitatory signals Inhibitory neurotransmitters neurotransmitters communicate signals neurotransmitters