nervous system
• suprapyramidal bundles are thicker while infrapyramidal bundles are longer than in wild-type mice
• mossy fiber spreading from the suprapyramidal and infrapyramidal bundles into the stratum radiatum and stratum oriens is inappropriate compared to in wild-type mice
• mossy fiber projections of P5 hippocampal slices cultured for 5 days exhibit very thin suprapyramidal bundles and spread widely within the stratum radiatum compared projections from wild-type cultures
• whether CA3 slices are cocultured with dentate gyrus slices from wild-type or Sema6btm1Hfu mice, mossy fibers spread abnormally into the stratum radiatum unlike similarly treated wild-type CA3 slices
• mossy fibers invade the inner molecular layer of the dentate gyrus unlike in wild-type mice
• mice exhibit abnormal projection of mossy cell axons compared to in wild-type mice
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