Some of the earliest signs of ASD involve atypical processing and response to auditory input. In conclusion, attention to specific-frequency deficits using noninvasive measures of cochlear function may be important in auditory processing impairments found in ASD.Īutism Spectrum Disorder (ASD) is a behaviorally diagnosed disorder of early onset characterized by impairment in social communication and restricted and repetitive behaviors. No significant differences were noted in DPOAE or TrOAE noise floors, middle ear muscle reflex activity, or efferent suppression between children with ASD and TD controls. Furthermore, analysis of the spectral features of TrOAEs revealed significantly decreased emissions in ASD in similar frequencies. Children with ASD had greatly reduced DPOAE responses in the 1 kHz frequency range, yet had comparable DPOAE responses at 0.5 and 4-8 kHz regions. All participants were males 6-17 years old, with normal audiometry, and rigorously characterized via ADI-R and ADOS. Our objective was to specifically measure baseline afferent otoacoustic emissions (distortion-product otoacoustic emissions DPOAEs), transient-evoked otoacoustic emissions (TrOAEs) and efferent suppression, in 35 children with high-functioning ASD compared with 42 aged-matched TD controls. We were interested then to know if otoacoustic emissions in children with normal audiometric thresholds would also reveal differences between children with ASD and typical developing (TD) controls in mid-frequency regions. In addition, otoacoustic emissions have been used to detect reduced cochlear function in the presence of normal audiometric thresholds. Some of the earliest signs of ASD involve auditory processing, and a recent study found that hearing thresholds in children with ASD in the mid-range frequencies were significantly related to receptive and expressive language measures. Autism spectrum disorder (ASD) is a behaviorally diagnosed disorder of early onset characterized by impairment in social communication and restricted and repetitive behaviors.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |