My child is 18 months and has been diagnosed as globally delayed. He had an MRI and EEG done. They both came as normal. However, the MRI mentioned a slight delay in the myelinazation development. My son is unable to walk or talk at this point. He is making very slow progress in his development and I am very concerned about possible neurological issues. He was allergic to milk at birth, a normal birth at 9 pounds. He was pretty much a healthy baby. He has Blue Mongolian marks on his back and buttocks that has not faded away. He developed an eye twitching habit six months ago that was diagnosed as a tick or steroetypie and he really enjoys staring at bright house lights. Is there something that we could be missing that could help explain my son's mystery?