Signs vary from person to person. Young children and babies lack movement and have a difficult time eating and breathing. For young children not diagnosed immediately at birth, these are usually the first visible symptoms. One sign is a swollen face in disproportional areas. Other examples in newborns include swaying and a difficulty in moving. Other symptoms include feeble muscles in the neck and upper rib cage area. In adults, the most common symptom is respiratory problems. Other symptoms in adults could range from mild to severe speech impediments. It is common to be diagnosed with scoliosis in relations to nemaline myopathy.