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).
Vitamins B6 and B12 support nerve function and aid in the formation of amino acids. Amino acids are the building blocks of protein, which are used to form muscles, tendons and ligaments. These B vitamins are found mostly in animal products, but you can also get them in a multivitamin or B complex vitamin.