![]() Examining the responses for axonal and synaptic delays revealed evidence of a synaptic pattern of abnormalities in a significant portion (37.03%) of children sAPD. These results suggest that a significant portion of children with listening difficulties showed evidence of reduced or atypical brainstem functioning. Examination of responses delineating axonal versus synaptic transmission showed significant delays in synaptic transmission in the group of children sAPD in comparison to TD children and adults. But individual children sAPD showed clinically significant delays (>2 standard deviations of TD children's data). Children sAPD showed absolute latencies that were significantly prolonged when compared with adults but not when compared with TD children. ABRs were analyzed using typical clinical measures (latencies and interpeak intervals for waves I, III, and V) and using a model proposed by Ponton et al that offered a more detailed analysis of axonal conduction time and synaptic transmission delay.īoth clinical measures and the Ponton model analysis showed no significant differences between TD children and adults. Twenty adults and 22 typically developing (TD) children were recruited as controls.Ĭlick-evoked ABRs were recorded at slow (13.3 clicks/sec) and faster (57.7 clicks/sec) stimulation rates. This study retrospectively examined the records of 108 children suspected of APD (sAPD) who had click-evoked ABRs recorded as part of their clinical assessment. This study compared the auditory brainstem responses (ABRs) of children with APD with age-matched children and adults. ![]() The ASHA recommends including electrophysiological measures in an auditory processing disorder (APD) assessment battery, but few audiologists do so, potentially because of limited published evidence for its utility.
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