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).
Taking too much vitamin B6 can cause nerve damage, but vitamin B12 is safe for most people.Sufficient amounts of vitamin B6 and vitamin B12 are needed to stay well and feel your best, but itâs possible to get too much of these vitamins if you take supplements.aking too much vitamin B6 can cause nerve damage, but vitamin B12 is safe for most people.