Macrocephaly and minor congenital anomalies in children with learning problems
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Insights
Children with learning disabilities show a higher prevalence of macrocephaly (large head circumference). Macrocephalic children with learning problems had lower achievement scores, suggesting a link between head size and learning deficits.
Area of Science:
- Neurodevelopmental disorders
- Pediatric learning disabilities
- Human genetics
Background:
- Previous studies indicated a higher prevalence of abnormal head circumference and minor congenital anomalies in children with learning disabilities.
- The current study aimed to validate these findings in a non-referred population.
Purpose of the Study:
- To investigate the prevalence of macrocephaly and minor congenital anomalies in children with learning disabilities compared to a control group.
- To explore the relationship between macrocephaly, learning deficits, and psychometric parameters.
Main Methods:
- A comparative study involving 75 children in learning disabilities resource programs and 73 matched control children.
- Assessment included head circumference measurements, identification of minor congenital anomalies, and psychometric testing.
Main Results:
- Macrocephaly was significantly more frequent in children with learning disabilities (12 vs. 3).
- Macrocephalic children with learning disabilities exhibited lower achievement scores.
- No significant differences were found in the prevalence or patterns of minor congenital anomalies between groups.
Conclusions:
- This study confirms a higher prevalence of macrocephaly in children with learning problems.
- Further research is needed on learning deficits in familial macrocephaly.
- Findings raise questions about current psychoeducational criteria for specific learning disabilities.
Abstract:
To determine whether existing data which indicate a significant prevalence of abnormal head circumference and minor congenital anomalies in referred learning disabled populations could be replicated in a nonreferred population, 75 children enrolled in learning disabilities resource programs in an elementary school district were compared with a matched group of 73 children. Macrocephaly (occipitofrontal head circumference of 2 or more SD above the mean) was noted significantly more often in resource than in control children (12 versus 3) (p less than 0.05). Macrocephalic resource children had significantly lower achievement scores than either normocephalic resource or control children (p less than 0.05). There were no significant differences between resource and control children for mean number of anomalies per child, frequency of individual anomalies per group, or evidence of recurring anomaly patterns in the resource children. The macrocephalic resource children revealed the same prevalence of anomalies as normocephalic resource and control children, with no evidence of recurring anomaly patterns. Resource children with four or more anomalies did not differ from those with three or fewer anomalies on any psychometric parameters. Clinical, familial, radiological, and psychometric investigation of several macrocephalic resource children indicated similar patterns of learning deficits and documented evidence of familial macrocephaly but did not show any recognizable CNS abnormalities. This study confirms a significant prevalence of macrocephaly in children with learning problems. It indicates the need for further research into the prevalance and patterns of learning deficits in children with familial macrocephaly. The results add to recent concerns about the psychoeducational criteria of specific learning disabilities.(ABSTRACT TRUNCATED AT 250 WORDS)