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.
The first, second or third toes are often the landmarks because they are usually the longest toes in your foot. Always buy a pair of shoes that fit the bigger foot. The reason for this is that you can place an over the counter insole in the larger one to either take up some of the room or prevent foot slippage. Never force your foot into a shoe that is too small or too tight. Wearing ill-fitting shoes can cause foot, ankle, knee and low back problems.