Also, Inhibitory Input - Most generally, this describes an input that, when stimulated, will tend to decrease the output of a neuron.
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In biological neurons this is a synapse that, when stimulated by an input signal, tends to reduce the likelihood that the neuron will fire.
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In artificial neurons, input signals connected to an inhibitory synapse will tend to reduce the output value produced by the neuron. Such inhibitory behavior is usually accomplished in artificial neurons by modulating the input signal by a negative weight value, which represents the connection-strength.