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.
A flat-footed gait can cause foot, leg and even knee pain, as well as reducing the footâs ability to absorb. the shock of striking the ground. In the long term, this type of flat-footed stance may affect your. mobility (see figure 1 on page 2). Some people with Parkinsonâs feel as if they are âwalking on their toesâ.