Signal summation at the axon hillock
A single neuron can receive both excitatory and inhibitory inputs from multiple neurons. All these inputs are added together at the axon hillock. If the EPSPs are strong enough to overcome the IPSPs and reach the threshold of excitation, the neuron will fire.
Source
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"OpenStax College, How Neurons Communicate. October 17, 2013."
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OpenStax CNX
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