High Quality Content by WIKIPEDIA articles! Synaptic fatigue, or short-term synaptic depression, is an activity-dependent form of short-term plasticity that affects neuronal efficacy and results in the temporary inability to fire and therefore transmit an input signal. It is thought to be a form of negative feedback in order to physiologically control particular forms of nervous system activity. Synaptic fatigue involves the temporary inhibition of neurons due to constant and persistent stimulation, where the fatigue effects are generally dependent upon the type and frequency of stimuli present. The underlying cause of fatigue on the synapse is temporary depletion of synaptic vesicles that house neurotransmitters in the presynaptic cell. The neurotransmitters are released to propagate the signal to the postsynaptic cell. It has also been hypothesized that synaptic fatigue could be a result of postsynaptic receptor desensitization or changes in postsynaptic passive conductance, but...

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