nervous system
• mice exhibit an increase in basal spine density and overall spine volume compared with wild-type mice
• mice exposed to environmental enrichment exhibit a blunted increase in dendritic spine density compared with wild-type mice
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• mice exhibit larger miniature excitatory postsynaptic current (mEPSC) amplitude and frequency compared with wild-type mice
• mice exposed to environmental enrichment fail to exhibit an increase in mEPSC amplitude distribution and mean amplitude unlike wild-type mice
• hippocampal neurons treated with TTX fail to exhibit a change in the distribution of mEPSC amplitude or mean amplitude of mEPSCs unlike in wild-type mice
• however, reintroduction of wild-type protein rescues mEPSC amplitude and frequency
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