Abstract：
UNLABELLED:To investigate the transient evoked otoacoustic emissions (TEOAE) contralateral suppression in neonates at risk for hearing loss, 55 neonates at risk for hearing loss (risk group) and 72 full-term neonates not at such risk (control group) were bilaterally tested. In all neonates, the TEOAE were recorded in two stimulation modes (linear and nonlinear clicks), with and without contralateral acoustic stimulation. Findings revealed significant contralateral suppression of otoacoustic emissions in both groups, but the amount of TEOAE contralateral suppression was reduced for at risk group (p=0.001), supporting the hypothesis that medial olivocochlear bundle function is reduced in neonates at risk for hearing loss. The combination of contralateral acoustic stimulation and TEOAE enables easy and noninvasive study of auditory efferent function. However it should be emphasized that the reduction in TEOAE contralateral suppression in the risk group, statistically identified as a group effect, might not be detectable in individual cases. Further studies are needed in order to determine whether the lower amount of TEOAE contralateral suppression in neonates at risk for hearing loss represents a risk for developing auditory processing disorders. LEARNING OUTCOMES:The reader will be introduced to the study using auditory efferent pathway activation by contralateral acoustic stimulation (CAS), resulting in the TEOAE suppression effect. The characteristics of TEOAE suppression in the neonatal population, in which it provides evidence of the reduced medial olivocochlear system function in those at risk for hearing loss, will also be addressed.
journal_name
J Commun Disordjournal_title
Journal of communication disordersauthors
Durante AS,Carvallo RMdoi
10.1016/j.jcomdis.2007.05.001subject
Has Abstractpub_date
2008-01-01 00:00:00pages
70-83issue
1eissn
0021-9924issn
1873-7994pii
S0021-9924(07)00035-4journal_volume
41pub_type
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journal_title：Journal of communication disorders
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pub_type： 临床试验,杂志文章,随机对照试验
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pub_type： 杂志文章
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pub_type： 杂志文章,评审
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pub_type： 杂志文章,评审
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