Type 4 Waardenburg syndrome (also called Waardenburg-Shah syndrome) is characterized by symptoms of Hirschsprung's disease in addition to the classic features of hearing loss and pigmentation abnormalities.
[Effects of a vitamin B complex on functional recovery after nerve injury (author's transl)]. Hasegawa K, Mikuni N, Sakai Y. Functional recovery after nerve crushing was investigated in the following manner: Under pentobarbital anesthesia the sciatic nerve of the rat was crushed at the level of the hip (proximal crush) or the thigh (distal crush).
Several nutrients that may help heal nerves include vitamin B complex, vitamin E and gamma-linolenic acid, or GLA. Although some studies have been conducted to determine the value of these nutrients, consult with a trained health care practitioner to establish the best course of action for healing nerve damage.