nervous system
• number of Shox2-expressing V2a interneurons is reduced by 98%; total number of Shox2-expressing interneurons is reduced by >80%
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• variability in locomotor parameters (cycle period, burst duration, amplitude) that are observed in isolated neonatal spinal cords exposed to low NMDA concentrations is increased in mutants compared to controls; higher NMDA concentrations reduce this variability
• other parameters such as burst frequency and flexor-extensor alternation are not significantly different
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