Auditory brainstem response in premature and full-term children

Sleifer, Pricila; Costa, Sady Selaimen da; Cóser, Pedro Luiz; Goldani, Marcelo Zubarán; Dornelles, Cristina; Weiss, Kátia Maria

doi:10.1016/j.ijporl.2007.05.029

Cited by 61 publications

(104 citation statements)

References 13 publications

(21 reference statements)

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“…In relation to gestational age and maturation of the auditory pathway, it was observed that the higher gestational age, the greater the maturation of wave P1, which was indicated by the decrease in latency of this wave (Table 2). This finding is in agreement with the study that researched, through the Brainstem Auditory Evoked Potencials, the maturation of the auditory pathway in preterm children, concluding that the higher the gestational age, the lower the latency of the waves of this potential (22) . The subjects of this study already presented the exogenous components P1 and N1 of the cortical potentials, when evaluated with 1 month of life, results that are in agreement with other studies (9,16,17) .…”

Section: Discussionsupporting

confidence: 93%

“…The reduction in latency values is related to the gradual process of myelination of the central structures and maturation of central auditory pathways, which are processes of cortical organization that are necessary for the proper development of hearing and language (1,6) . The decrease in latency had also been found in studies with another type of Auditory Evoked Potential (22,23) . In relation to gestational age and maturation of the auditory pathway, it was observed that the higher gestational age, the greater the maturation of wave P1, which was indicated by the decrease in latency of this wave (Table 2).…”

Section: Discussionsupporting

confidence: 62%

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Audição e linguagem em crianças nascidas a termo e pré-termo

Costa

Quinto

Didoné

et al. 2016

Audiol., Commun. Res.

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Purpose: To examine the maturation of the auditory pathway of children who were born at term and preterm, during 2 years and 6 months. Moreover, we tried to compare this maturation to the development of language skills of these children. Methods: It is a longitudinal and comparative study, which presents a clinical outcome related to the observation and analysis of auditory electrophysiological responses at the first month of life and 2 years and at 6 months old. The sample consisted of eight children, of both genders, being five born at term and three at preterm. Cortical Auditory Evoked Potential and the language evaluation were carried out through the Behavioral Observation Protocol. Results: Both term and premature babies passed through a period of maturation of the auditory pathway. In the correlation of gestation and maturation of the auditory pathway, we observed that the higher gestational age, the higher was the maturation of P1 wave. There was no correlation between language evaluation results and the maturation of the auditory pathway. Conclusion: Based on the results of this study, we concluded that there was maturation of the auditory pathway in the two-year period in both groups. A correlation between gestational age and maturation of P1 was observed, which shows that the higher is the gestational age, the greater is the maturity of this component. Regarding the language skills, no correlation with the maturation of this sample was noticed.Keywords: Hearing; Evoked potentials, Auditory; Infant, Premature; Child language; Gestational age RESUMO Objetivo: Analisar a maturação da via auditiva de crianças nascidas a termo e pré-termo, ao longo de dois anos e seis meses e comparar a maturação auditiva com o desenvolvimento das habilidades linguísticas dessas crianças. Métodos: O estudo teve como desfecho clínico a observação e análise das respostas eletrofisiológicas auditivas de crianças, durante o primeiro mês de vida e aos 2 anos e 6 meses de idade. A amostra constituiu-se de oito crianças, de ambos os gêneros, sendo cinco nascidas a termo e três nascidas pré-termo. Realizou-se o Potencial Evocado Auditivo Cortical e a avaliação de linguagem, por meio do Protocolo de Observação Comportamental. Resultados: Tanto os bebês nascidos a termo como os prematuros passaram por um período de maturação da via auditiva. Na correlação da idade gestacional e maturação da via auditiva, observou-se que, quanto maior a idade gestacional, maior a maturação da onda P1. Não houve correlação entre os resultados da avaliação de linguagem e a maturação da via auditiva. Conclusão: Houve maturação da via auditiva no período de dois anos e seis meses, em ambos os grupos estudados. Observou-se correlação entre Idade Gestacional e a maturação de P1, demonstrando que, quanto maior a Idade Gestacional, maior a maturação deste componente. Quanto às habilidades de linguagem, não houve correlação com a maturação da via auditiva.Descritores: Audição; Potenciais evocados auditivos; Prematuro; Linguagem infantil; Idade gestacio...

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 62%

Audição e linguagem em crianças nascidas a termo e pré-termo

Costa

Quinto

Didoné

et al. 2016

Audiol., Commun. Res.

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“…Because of this, infants' responses are reflex until approximately the age of three months; they become inhibited as maturation of the Central Nervous System progresses, when the cortex begins to command children's responses (9) . Therefore, normal functioning of the central auditory structures is of great importance to the acquisition of perceptual skills by individuals (10) , considering that the integrity of such structures enables the proper development of oral language, as well as its acquisition (11) .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, normal functioning of the central auditory structures is of great importance to the acquisition of perceptual skills by individuals (10) , considering that the integrity of such structures enables the proper development of oral language, as well as its acquisition (11) . Studies have reported differences between the responses of term and preterm newborns in the BAEP, showing that the responses generated between the peripheral and central auditory pathways are influenced by the maturation process and gestational age, allowing visibility of the maturational effect on preterm neonates due to the difference in latency between responses when compared to those of neonates born at term (9,(12)(13)(14) . However, few studies the literature consulted (8,15) have addressed the applicability of CAEP in neonates, which indicates the need for research aiming to describe electrophysiologic findings, especially cortical evoked potentials, in this population.…”

Section: Introductionmentioning

confidence: 99%

Potenciais evocados auditivos corticais em neonatos nascidos a termo e pré-termo

Melo

Biaggio

Rechia³

et al. 2016

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RESUMO Objetivo Mensurar os potenciais exógenos do potencial evocado auditivo cortical (PEAC) em neonatos nascidos a termo e pré-termo, além de compará-los, considerando as variáveis latência e amplitude dos componentes. Método Estudo transversal, prospectivo, contemporâneo e comparativo. Foram avaliados 127 neonatos; destes, foram considerados 96, após análise dos exames por três juízes, distribuídos em dois grupos: Grupo Termo: 66 neonatos e Grupo Pré-termo: 30 neonatos. Os registros do PEAC foram feitos com os neonatos posicionados no colo da mãe e/ou responsável, em sono natural, por meio de eletrodos de superfície. Foram apresentados estímulos verbais binauralmente, sendo /ba/ o estímulo frequente e /ga/ o estímulo raro, na intensidade de 70 dBNA, por meio de fones de inserção. Foi analisada a presença ou ausência dos componentes exógenos em ambos os grupos, bem como, latência e amplitude de P1 e N1. Para análise dos dados, utilizaram-se os testes pertinentes. Resultados A latência da onda P1 bilateralmente e N1 na orelha esquerda foi menor no Grupo Termo. No entanto, não houve diferença estatisticamente significante quanto à amplitude de P1 e N1 entre os grupos. Na comparação entre presença e ausência dos componentes P2 e N2, também não foi observada diferença entre os grupos. Conclusão É possível mensurar os PEAC, em neonatos nascidos a termo e pré-termo. Verificou-se influência do processo maturacional apenas na medida da latência dos componentes P1 bilateralmente e N1 na orelha esquerda, sendo estas menores no Grupo Termo.

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“…It is believed that the highest acoustic reflex thresholds for newborns at risk were due to the immaturity of the structures in the external and middle ear, caused by the size and weight of the newborn, as well as auditory pathways, since most newborns in this group presented prematurity as a risk indicator. Some authors studied the neurological maturation of auditory pathways (26)(27)(28) and reported that it starts in the 6th month of intrauterine life, when the myelination of the peripheral region takes place, until the 6th month of postpartum life, and is completed around 18 months after birth -when the myelination of the brainstem is carried out. So, since most newborns in Group II were premature, it is natural that the maturation of the auditory pathways may be occurring at different times for Groups I and II.…”

Section: Discussionmentioning

confidence: 99%

Acoustic reflex on newborns: the influence of the 226 and 1,000 Hz probes

Jacob-Corteletti

Duarte

Zucki

et al. 2015

CoDAS

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PURPOSE: To analyze the occurrence of acoustic reflex and its threshold on newborns using the 226 and 1,000 Hz probes. METHODS: Thirty-six newborns with "PASS" results in newborn hearing screening and tympanogram with one or two peaks for both probe tones were included. Group I comprised 20 full-term newborns without risk indicator for hearing loss, and Group II comprised 16 newborns with at least one risk indicator. The study about ipsilateral acoustic reflex thresholds was conducted in 500, 1,000, 2,000, and 4,000 Hz. RESULTS: The groups presented the acoustic reflex thresholds between 50 and 100 dB for both probe tones. In the comparison between the probes, there were differences in all frequencies evaluated in Group I, with the lowest threshold mean for the 1,000 Hz probe. In Group II, differences were detected at 2,000 Hz. The mean acoustic reflex thresholds were similar in both groups for the 226 Hz probe. There was a difference for the 1,000 Hz probe in all tested frequencies. The percentage of response was higher in both groups for the 1,000 Hz probe. The kappa test showed extremely poor agreement in the comparison of results between both probes. CONCLUSION: The occurrence of acoustic reflex was higher in newborns and its thresholds were lower with the 1,000 Hz probe both for healthy newborns and for newborns at risk.

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Auditory brainstem response in premature and full-term children

Cited by 61 publications

References 13 publications

Audição e linguagem em crianças nascidas a termo e pré-termo

Audição e linguagem em crianças nascidas a termo e pré-termo

Potenciais evocados auditivos corticais em neonatos nascidos a termo e pré-termo

Acoustic reflex on newborns: the influence of the 226 and 1,000 Hz probes

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