The key finding
A systematic review of seven studies examining children with repaired cleft lip and palate (CLP) found that these children demonstrate comparable or even superior performance to typically developing peers in specific cognitive areas. Analyzing research published between 2000 and 2023 involving school-aged children under 18 years old, researchers discovered that children with CLP showed particular strengths in continuous performance tests measuring attention and in verbal memory tasks involving familiar stimuli. These findings challenge assumptions that children with CLP inevitably face broad cognitive disadvantages, instead suggesting they may develop alternative neurological pathways that compensate for early developmental challenges.
What the study looked like
This 2025 systematic review followed the PRISMA framework to analyze existing research on cognitive-linguistic abilities in children with CLP. Researchers searched electronic databases for studies published over a 23-year period, ultimately selecting seven studies that met rigorous criteria including having comparison groups of typically developing children. The review team used the Rayyan QCRI system for data extraction and evaluated study quality using the Appraisal Tool for Cross-Sectional Studies. The included studies examined various cognitive domains including attention (measured through tests like the CPT-II continuous performance test), memory function, executive function, and reading comprehension. All participants were school-aged children with repaired CLP, meaning they had undergone surgical correction of their cleft condition and were being compared to peers without this condition.
Why researchers think this happened
The review authors propose that children with CLP may develop compensatory neurological mechanisms to navigate the early challenges associated with their condition. Because cleft lip and palate can initially affect speech development and oral-motor function, children may recruit alternative brain pathways for language learning and cognitive processing. The finding that these children showed particular strength in verbal memory for familiar stimuli suggests they might process and retain language information differently than typically developing peers. These compensatory strategies could explain why children with CLP achieve developmental milestones comparable to their peers despite facing specific challenges. The research builds on prior understanding that the brain demonstrates remarkable plasticity during childhood, particularly when children receive appropriate medical and therapeutic interventions following cleft repair.
How to read this carefully
This review synthesizes only seven studies, a relatively small evidence base that limits how broadly we can generalize these findings. The studies were cross-sectional rather than longitudinal, meaning they capture snapshots in time rather than tracking individual children’s development over years. Results showed mixed findings—while some cognitive areas showed strengths, the review notes “contrasting findings” in memory performance, indicating not all children with CLP demonstrate the same patterns. The research doesn’t establish causation; we cannot say definitively that cleft repair or associated interventions cause these compensatory mechanisms. Additionally, the review doesn’t detail important variables like severity of original cleft, timing of surgical repair, or access to speech therapy, all of which likely influence cognitive outcomes. Readers should recognize these findings represent averages across groups, not predictions for individual children.
What this means for everyday life
For parents and educators of children with repaired cleft lip and palate, these findings offer reassurance that cognitive development can proceed typically with appropriate support. Rather than assuming these children will struggle academically, adults might focus on identifying each child’s specific strengths and challenges through careful observation and assessment. The emphasis on early identification and tailored interventions suggests that working with speech-language pathologists and educational specialists could help children capitalize on their natural compensatory abilities. Teachers might consider that a child with CLP history who seems to excel at certain attention tasks or verbal memory activities is demonstrating genuine cognitive strengths, not just overcoming deficits. Given this evidence, it might be worth considering comprehensive cognitive assessments for children with CLP that look beyond deficits to identify areas of strength that can support overall learning and development.