This commentary is on the systematic review by Barreto et al. on pages 163-168 of this issue.Cerebral palsy (CP) is a complex syndrome, rather than a unique disorder, separate from other neurological, neurodevelopmental, and neuropsychiatric conditions. We have known since 1996 that autism is overrepresented in CP 1 and that other mental health conditions (including attention-deficit/hyperactivity disorder [ADHD]) also occur at higher rates in children with CP. 2 Two recent papers address the neuropsychiatric problems associated with CP in children and their parents. 3,4 They draw attention to the need to broaden the scope of assessment, work-up, and follow-up of children and families affected by CP. Based on the US National Survey of Children's Health, Whitney et al. conclude that anxiety, behavioural problems, depression, and mental 'multimorbidity' are much more common in CP than in the general population of children. 3 They further state that increased risk of depression in children with CP is associated with low physical activity, suggesting that increased physical activity might lower the rate of depression in these children. While this seems to be a reasonable assumption and a good basis for a new study, no such effect of increased physical activity has yet been demonstrated.Whitney et al. also found no statistically significant increase in the prevalence of ADHD in their sample of children with CP. 3 This contrasts with the very high rates of (potentially treatable) ADHD we found in population-based studies of children with CP. 2 Given the 70% non-responserate in Whitney et al.'s study and the high rate of ADHD among non-responders in general child population studies, it is possible that ADHD rates were underestimated. Further, it is unclear why the authors did not include autism among the disorders that they looked for, given the high rate (18%) of autism reported by P ahlman et al. 2 The systematic review by Barreto et al. reports a higher prevalence of symptoms of depression and anxiety in parents of children with CP. 4 With regard to anxiety, however, Barreto et al. seem to have only actually found one study indicating there is no presented evidence that the rate is higher than in typical children or in parents of children with other neurological disorders.Even so, the two papers 3,4 are invaluable in identifying the need for prospective, longitudinal, controlled studies of child and parent mental (and physical) health in the context of CP. The many questions that remain unanswered in this regard include the following: (1) What is the full range of problems faced by children with CP and their families? An Early Symptomatic Syndromes Eliciting Neurodevelopmental (Neuropsychiatric) Clinical Examinations (ESSENCE) approach 5 could be taken to assess the full range of possible problems in each individual, including autism and other communication disorders, ADHD, depression, anxiety, and learning disorders. (2) What is the parents' health status before the occurrence of CP? (3) How old is the child when ev...