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 list of signs and symptoms mentioned in various sources for Flat feet includes the 6 symptoms listed below: 1  Lowered foot arch. 2  Flat foot arch. 3  Symptoms of acquired flat feet from wear to the tendon: Foot turning outwards. Ankle weakness. Foot pain. 4  more information...Â».