Nerve fiber = multicellular, containing both an axon and surrounding myelin sheath. The axon comes from a single neuron, but the myelin sheath is made by a train of many myelinating Schwann cells. In the case of unmyelinated axons, the unmyelinated fiber shares each Schwann cell with several other unmyelinated axons.
Flat feet (pes planus) occur when a child has no arch in their foot. Because an arch does not form, the foot appears to turn to the outside. Children with out-toeing due to flatfeet will rarely experience pain symptoms will not require treatment.
Podiatrist Beverley Ashdown advises: 1  Alternate flat shoes with other heel heights and styles of shoes. Problems tend to occur when we wear the same style of shoe day in, day out. 2  Always look for shoes that do up. Anything with buckles, laces, or Velcro straps is likely to offer a reasonable amount of support.