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.
Causes of hammer toes include shoes that donât fit properly, foot injuries, bunions and rheumatoid arthritis. Having toe joints sticking out can cause them to rub and a person may walk differently, risking other foot conditions, such as metatarsalgia. Hammer toes can be a serious problem in people with diabetes or poor circulation. Flexible hammer toes. If the toe can still be moved at the joint, it's a flexible hammer toe.