An 11-year-old girl presents with right foot problems that has worsened over the past few weeks. It was observed that she is clenching her toes, but on closer inspection, it appears she has no control over this. It was noted that she has pes cavus.

What may be the cause of such symptoms? *This case is from the Editorial team of Docplexus and is meant for educative purposes only. Source: Pediatric Musculoskeletal (The answer is posted in the comment section below!)