Causes of Cerebral Palsy

Types of and Causes of Cerebral Palsy
By David Chandler

Cerebral palsy is not a disease it is a condition. Cerebral refers to the brain and palsy means weakness or lack of muscle control. In addition, cerebral palsy is not a single problem, but a complex disease in which virtually all brain cell types could need repair. Approximately 90 percent of all cases are caused by brain injury during the prenatal period (before labor begins). This condition is caused by damage to brain cells that control the movement of muscles. A person with cerebral palsy can have mild to severe physical disabilities. There are varying degrees of therapies depending on the degree of condition. However, just because a person has cerebral palsy, it does not mean they will have other disabilities. Causes and Risks

Recent studies suggest that cerebral palsy is mostly due to factors affecting the brain before birth. In about 70 percent of cases, cerebral palsy results from events occurring before birth that can disrupt normal development of the brain. This condition is caused by an injury to the brain during pregnancy, at birth, or shortly after birth. The symptoms are usually not noticeable at birth. It was previously assumed that it was caused by fetal distress, such as a lack of oxygen, during the birth process. However, lack of oxygen at birth has not been shown to be the major cause. The motor deficits of babies are usually unrecognizable before 4-6 months of age.

A preemie's risk of cerebral palsy is much higher than that of a full-term baby. In addition, exposure to herpes group B viruses was associated with a two-fold increase in risk. Reproductive/urinary tract infections also may increase the risk in a preterm delivery. Preemie's are already at risk for cerebral palsy and account for approximately one-third of the cases. Adequate prenatal care may reduce the risk of the unborn baby.