nervous system
• at 2 to 3 months of age, long term depression induced with paired-pulse 1 Hz protocol is abolished (94+/-3% of baseline compared to 82+/-4% of baseline for wild-type mice)
• however, long tern depression (LTD) and long term potential (LTP) are normal in young mice (LTD, 77+/-5% of baseline compared to 85+/-3% of baseline; LTP, 138+/-9% of baseline compared to 149+/-12% of baseline for wild-type mice) and synaptic transmission are normal in adult mice
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