Cerebral palsy (CP) is a group of movement disorders that appear in early childhood. Signs and symptoms vary among people and over time, but include poor coordination, stiff muscles, weak muscles, and tremors. There may be problems with sensation, vision, hearing, and speaking. Often, babies with cerebral palsy do not roll over, sit, crawl or walk as early as other children of their age. Other symptoms include seizures and problems with thinking or reasoning, which each occur in about one-third of people with CP. While symptoms may get more noticeable over the first few years of life, underlying problems do not worsen over time.Cerebral palsy is caused by abnormal development or damage to the parts of the brain that control movement, balance, and posture. Most often, the problems occur during pregnancy, but they may also occur during childbirth or shortly after birth. Often, the cause is unknown. Risk factors include preterm birth, being a twin, certain infections during pregnancy, such as toxoplasmosis or rubella, exposure to methylmercury during pregnancy, a difficult delivery, and head trauma during the first few years of life, among others. About 2% of cases are believed to be due to an inherited genetic cause. A number of sub-types are classified, based on the specific problems present. For example, those with stiff muscles have spastic cerebral palsy, those with poor coordination in locomotion have ataxic cerebral palsy, and those with writhing movements have dyskinetic cerebral palsy. Diagnosis is based on the childs development over time.
RJ Mitte, an American actor best known for his role as Walter White Jr. in Breaking Bad. He is also a celebrity ambassador for United Cerebral Palsy. Zach Anner, an American comedian, actor, and writer. He had a television series on Oprah Winfreys OWN called Rollin With Zach and is the author of If at Birth You Dont Succeed. Kaine, a member of the American hip-hop duo The Ying Yang Twins, has a mild form of cerebral palsy that causes him to limp. Hannah Cockroft, is a British wheelchair athlete specialising in sprint distances in the T34 classification. She holds the Paralympic and world records for the 100 metres, 200 metres and 400 metres in her classification. Keah Brown, American disability rights activist, author and journalist. Kuli Kohli, Indian-British writer, poet, activist. Simon James Stevens, a British disability issues consultant and activist, who starred in Im Spazticus and founded Wheelies virtual nightclub 
The Roman Emperor Claudius is hypothesized to have had cerebral palsy on the basis of his reported symptoms. Rosie Jones, a British comedian and actress, is incorporating her cerebral palsy into her comedic style. Litigation
Because of the false perception that cerebral palsy is mostly caused by trauma during birth, as of 2005, 60% of obstetric litigation was about cerebral palsy, which Alastair MacLennan, Professor of Obstetrics and Gynaecology at the University of Adelaide, regards as causing an exodus from the profession.