what type of testing determines diagnosis for poor muscle tone in a child
â¢ A child with hypotonia may also have problems with speech or exhibit shallow breathing. How Boston Children's Hospital approaches muscle weakness. Your child's muscle weakness can be caused by several different diseases, and treatment cannot begin without sussing out the real cause.At Boston Children's, doctors have several tests available to diagnose the cause of your child's weakness.t can be a condition on its own, called benign congenital hypotonia, or it can be indicative of another problem where there is progressive loss of muscle tone, such as muscular dystrophy or cerebral palsy.