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.
1 Medical conditions such as eczema, psoriasis and dermatitis can all cause dry skin of the feet. 2  If you have any of these conditions consult a Healthcare Professional. 3  Footwear can cause dry skin of the heel when wearing open backed shoes.4  Sometimes as we get older the skin becomes dryer.auses of Dry Skin. 1  Medical conditions such as eczema, psoriasis and dermatitis can all cause dry skin of the feet. 2  Footwear can cause dry skin of the heel when wearing open backed shoes. 3  Sometimes as we get older the skin becomes dryer.