The relationship between brainstem temporal processing and performance on tests of central auditory function in children with reading disorders.
OBJECTIVE
Studies using speech stimuli to elicit electrophysiologic responses have found approximately 30% of children with language-based learning problems demonstrate abnormal brainstem timing. Research is needed regarding how these responses relate to performance on behavioral tests of central auditory function. The purpose of the study was to investigate performance of children with dyslexia with and without abnormal brainstem timing and children with no history of learning or related disorders on behavioral tests of central auditory function.


METHODS
Performance of 30 school-age children on behavioral central auditory tests in common clinical use was examined: Group 1 (n = 10): dyslexia, abnormal brainstem timing; Group 2 (n = 10): dyslexia, normal brainstem timing; Group 3 (n = 10): typical controls.


RESULTS
Results indicated that all participants in Group 2 met diagnostic criteria for (central) auditory processing disorder [(C)APD], whereas only 4 participants in Group 1 met criteria. The Biological Marker of Auditory Processing (BioMARK) identified 6 children in Group 1 who did not meet diagnostic criteria for (C)APD but displayed abnormal brainstem timing.


CONCLUSIONS
Results underscore the importance of central auditory assessment for children with dyslexia. Furthermore, the BioMARK may be useful in identifying children with central auditory dysfunction who would not have been identified using behavioral methods of (C)APD assessment.
Billiet
Cassandra R
CR
The University of South Dakota, Vermillion, USA. cbilliet@oakdaleent.com
Bellis
Teri James
TJ
D001308:Auditory Perceptual Disorders / Q000175:diagnosis / Q000503:physiopathology*; D001933:Brain Stem / Q000503:physiopathology*; D002648:Child; D004410:Dyslexia / Q000175:diagnosis / Q000503:physiopathology*; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D011930:Reaction Time / Q000502:physiology; D012984:Software; D013063:Speech Discrimination Tests / Q000379:methods; D013067:Speech Perception / Q000502:physiology*