摘要：Objetivo verificar a ocorrência de alterações auditivas em lactentes com alteração do corpo caloso, comparando-os a crianças sem tal malformação.Métodos estudo de coorte dividido em duas partes: retrospectivo de 2008 a 2011 e prospectivo de 2011 a 2012.O grupo estudo foi constituído por 12 lactentes com diagnóstico de agenesia de corpo caloso e o grupo controlepor12 lactentes, pareados por idade pós concepcional e sexo.Todos realizaram Emissões Otoacústicas Evocadas por Estimulo Transiente, Potencial Evocado Auditivo de Tronco Encefálico (análise da média das latências das ondas I, III e V e interpicos I-III, III-V e I-V a 80dBnNA) e Avaliação do Comportamento Auditivo.Resultados na análise da ocorrência de alteração auditiva na avaliação com Emissões Otoacústicas Transientes e Potencial Evocado Auditivo de Tronco Encefálico, houve diferença em ambos os grupos com maior percentual de resultados normais no grupo controle.Houve diferença significante entre as orelhas, nas latências da onda III e intervalo interpico I-III, menor à direita, nogrupo controle.Naavaliação comportamental, houve diferença significante entre os grupos em relação aos resultados normais e alterados, com maior ocorrência de alteração central no grupo estudo.Ainda neste grupo, a segunda avaliação mostrou maior índice de resultados alterados quando comparados à primeira avaliação, sendo estaticamente significante.Conclusão as alterações auditivas nos lactentes com alteração do corpo caloso não foram identificadas ao nascimento, tendo sido apenas a partir de seis meses de vida.A maioria das alterações ocorreram na via auditiva central, no tronco encefálico.
其他摘要：Purpose to assess the occurrence of hearing loss in infants with corpus callosum agenesis comparing them to children without such malformation. Methods a cohort study in two parts: a retrospective from 2008 to 2011, and prospective from 2011 to 2012. The study group consisted of 12 infants diagnosed with agenesis of the corpus callosum and the control group of 12 infants, matched for sex and post conceptional age. All patients underwent otoacoustic emissions transient stimulus, Auditory Evoked Potential (analysis of the average latencies of waves I, III and V and interpeak I-III, III-V and IV 80dBnNA) and behavioral auditory tests. Results the analysis of the occurrence of hearing impairment evaluationotoacoustic emissions transient stimulusand Auditory Evoked Potential showed differences in both groups, withhighest percentage of normal results in the control group. There was significant difference between the ears, the latencies of wave III and I-III interpeak interval, and lower right in the control group. In behavioral assessment, there was significant difference between the groups in relation to normal and abnormal results, with higher prevalence of central alteration in the study group. Also in this group, the second assessment showed a statistically significant higher rate of abnormal results when compared to the first assessment. Conclusion hearing disorders in infants with corpus callosum agenesis were not identified at birth, but within the first six months of life. Most of the changes occurred in the central auditory pathway in the brainstem.↓Purpose to assess the occurrence of hearing loss in infants with corpus callosum agenesis comparing them to children without such malformation. Methods a cohort study in two parts: a retrospective from 2008 to 2011, and prospective from 2011 to 2012. The study group consisted of 12 infants diagnosed with agenesis of the corpus callosum and the control group of 12 infants, matched for sex and post conceptional age. All patients underwent otoacoustic emissions transient stimulus, Auditory Evoked Potential (analysis of the average latencies of waves I, III and V and interpeak I-III, III-V and IV 80dBnNA) and behavioral auditory tests. Results the analysis of the occurrence of hearing impairment evaluationotoacoustic emissions transient stimulusand Auditory Evoked Potential showed differences in both groups, withhighest percentage of normal results in the control group. There was significant difference between the ears, the latencies of wave III and I-III interpeak interval, and lower right in the control group. In behavioral assessment, there was significant difference between the groups in relation to normal and abnormal results, with higher prevalence of central alteration in the study group. Also in this group, the second assessment showed a statistically significant higher rate of abnormal results when compared to the first assessment. Conclusion hearing disorders in infants with corpus callosum agenesis were not identified at birth, but within the first six months of life. Most of the changes occurred in the central auditory pathway in the brainstem.
