Inhibitory signals have an opposite effect. Such signals cause a wave of hyperpolarization along the membrane of a post-synaptic cell known as an inhibitory post-synaptic potential (IPSP). ... The presence of IPSPs, however, will lower the membrane potential.

Do inhibitory synapses cause depolarization?

An inhibitory postsynaptic potential (IPSP) is a kind of synaptic potential that makes a postsynaptic neuron less likely to generate an action potential. ... Depolarization can also occur due to an IPSP if the reverse potential is between the resting threshold and the action potential threshold.

What do inhibitory signals do?

Inhibitory neurotransmitters have inhibitory effects on the neuron. This means they decrease the likelihood that the neuron will fire an action.