behavior/neurological
• retain left-right alternation in waliking
• foot placement and gait similar to clubfoot phenotypes
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• distally restricted leg paralysis
• could bear body weight on hind legs
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nervous system
• thinner or shorter peroneal nerve at E12.5 and E13.5
• peroneal branch absent in adults
• all lumbo-sacral spinal roots transformed and as a result one thoracic root is lost
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