HOW IS A DIAGNOSIS OF CEREBRAL PALSY MADE?

Many of the normal developmental milestones, such as reaching for toys (3-4 months), sitting (6-7 months), and walking (10-14 months), are based on motor function. A physician may suspect cerebral palsy in a child whose development of these skills is delayed. In making a diagnosis of cerebral palsy, the physician takes into account the delay in developmental milestones as well as physical findings that might include abnormal muscle tone, abnormal movements, abnormal reflexes and persistent infantile reflexes. Making a definite diagnosis of cerebral palsy is not always easy, especially before the child's first birthday. In fact, diagnosing cerebral palsy usually involves a period of waiting for the definite and permanent appearance of specific motor problems. Most children with cerebral palsy can be diagnosed by the age of 18 months, but eighteen months is a long time for parents to wait for a diagnosis, and this is understandably a difficult period for them. Making a diagnosis of cerebral palsy is also difficult when, for example, a two-year- old has suffered a head injury. The child may immediately appear to be severely injured, and three months after the injury he may have symptoms that are typical of a child with cerebral palsy. But one year after the injury such a child may be completely normal. This child does not have cerebral palsy. Although he has a scar on his brain, the scar is not permanently impairing his motor activities. After injury, waiting and observing are necessary before the diagnosis can be made.