Alvarenga Kátia de Freitas, Vicente Leticia Cristina, Lopes Raquel Caroline Ferreira, Ventura Luzia Maria Pozzobom, Bevilacqua Maria Cecília, Moret Adriane Lima Mortari
Universidade de São Paulo, BauruSP, Brazil, Universidade de São Paulo - USP - Bauru (SP), Brazil.
Codas. 2013;25(6):521-6. doi: 10.1590/S2317-17822014000100004.
To assess the characteristics of P1 component in children presented with pre-lingual hearing loss, users of cochlear implants, and correlate them with speech perception performance.
Ten children presented with pre-lingual sensory neural hearing loss using cochlear implants participated in this research. The cortical auditory evoked potential research was carried out with the /da/ speech stimulus, presented in free field, in three moments: at cochlear implant activation, with three and six months following activation. The Infant-Toddler Meaningful Auditory Integration Scale was used to verify the speech perception.
The correlation of the three moments of the test with the latency and the amplitude of P1 component through analysis of variance were observed. The comparison of latency and amplitude of P1 in each assessment moment was performed with Tukey's test. Wilcoxon and t-test showed that the score on the Infant-Toddler Meaningful Auditory Integration Scale increased significantly with the time of cochlear implant use, nevertheless with no correlation with the latency and amplitude of P1 component in the moments assessed, as demonstrated by Spearman's and Pearson's correlations.
The latency and amplitude of P1 component diminish as the time of cochlear implant use increases. However, there was no correlation between its development and speech perception performance.
评估语前聋儿童、人工耳蜗使用者的P1成分特征，并将其与言语感知表现相关联。
十名使用人工耳蜗的语前感觉神经性听力损失儿童参与了本研究。采用/da/语音刺激在自由声场中进行皮层听觉诱发电位研究，分别在人工耳蜗激活时、激活后三个月和六个月这三个时间点进行。使用婴幼儿有意义听觉整合量表来验证言语感知。
通过方差分析观察了测试的三个时间点与P1成分潜伏期和波幅的相关性。在每个评估时间点，使用Tukey检验对P1的潜伏期和波幅进行比较。Wilcoxon检验和t检验表明，随着人工耳蜗使用时间的增加，婴幼儿有意义听觉整合量表得分显著提高，然而，如Spearman相关性和Pearson相关性所示，在评估的时间点，其得分与P1成分的潜伏期和波幅无相关性。
随着人工耳蜗使用时间的增加，P1成分的潜伏期和波幅减小。然而，其发展与言语感知表现之间无相关性。
