-Dissociated motor development (DMD) is considered when the baby starts independent walking late, with normality of the other fields of development. There is evidence that babies with DMD present an atypical crawling pattern and hypotonia. To investigate the frequency and characteristics of DMD, neurological examination was performed monthly in 177 healthy full-term babies from 6 months age, in urban and rural zone samples in Brazil. Among 20 children with atypical crawling, none presented hypotonia neither did they start independent walking late. The means of the ages at the begining of atypical crawling and independent walking acquisitions, 7.40mo (SD 1.4) and 12.76mo (SD 2.5) respectively, did not differ from the group with crossed crawling pattern. Thus, in this sample of Brazilian healthy children we did not find cases with DMD.KEY WORDS: crawling, postural development, child development, motor skills, child.Desenvolvimento motor dissociado: um enfoque em crianças brasileiras RESUMO -Desenvolvimento motor dissociado (DMD) é considerado quando o bebê inicia tardiamente a marcha sem apoio, tendo apresentado normalidade em outros setores do desenvolvimento. Tem sido associado à hipotonia e ao engatinhar atípico. Para investigar a frequência e características do DMD, exame neurológico foi realizado mensalmente após os 6 meses em 177 bebês nascidos a termo, em duas amostras procedentes de zona rural e urbana no Brasil. Entre as 20 crianças com engatinhar atípico, nenhuma apresentou hipotonia e nem atraso para a marcha sem apoio. As médias das idades no início do engatinhar atípico e marcha independente foram 7,40 (dp 1,4) meses e 12,76 (dp 2,5) meses respectivamente, que não diferiram do grupo que engatinhou com padrão cruzado. Portanto, nesta amostra de crianças brasileiras não foram encontrados casos com DMD.
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