沉默突触（silent synapse）是指具有突触结构，但在生理情况下没有传递功能的突触。沉默突触在某些情况下能转变为功能性突触并能增加突触联系（即能与其他末梢形成新的突触），突触功能与结构上的变化统称为突触的可塑性，它的这一性质与神经修复、记忆改善等过程密切相关。所以，研究沉默突触的形成、功能、激活机制等意义重大。%Silent synapse is defined as a synapse that is incapable of exerting neurotransmission in physiological conditions but could be activated under certain conditions. The change of function and structure of synapses are defined as plasticity of synapse, and this property of synapses is related to restoration of the neurons and memory improvement. It is essential to understand the mechanisms of formation, function and activation of silent synapse.
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