Inclusion Criteria for patients:  adolescents, aged 8 to 18 years with a diagnosis of cerebral palsy able to understand and answer the questions  Exclusion Criteria for patients:  previous interventional procedures, such as surgery within the last one month using painkillers having concomittan diagnosed 'Autism Spectrum Disorder' or 'Attention Deficit Hyperactivity Disorder' or another neuromuscular disorder  Inclusion Criteria for their mothers:  primary caregivers who spend most of their time with their children do not work outside the home  Exclusion Criteria for their mothers:  not primary caregivers who spend most of their time with their children work outside the home