It can do any of those or the opposite. The effect of the signals from one neuron depend on the properties of the receiving neuron. Ie, the same neurotransmitt

It can do any of those or the opposite. The effect of the signals from one neuron depend on the properties of the receiving neuron. Ie, the same neurotransmitter released can be "excitatory" to neighboring neurons in one case and "inhibitory" in the next: https://www.sciencedirect.com/science/article/pii/S0306452214006411 https://www.sciencedirect.com/science/article/pii/S030645221...