It is particularly progressive, and characterized by rapid muscle deterioration. Failure to reach milestones such as rolling over, sitting up, or standing is
Affected children tend to have progressive physical and mental retardation with loss of previously attained milestones. Head size becomes increasingly large and the forehead appears prominent as a...
Before six months of age, they become irritable, stiff, and rigid. They may have trouble eating and may have seizures . Development regresses leading to loss of mental and muscle function
Outward signs or described sensations attributed to a disease or disorder after examination by a health care professional. They will vary depending on the disease and body systems affected. Most...