The relationship between the lack of stapedial muscle reflex and the presence of (central) auditory processing disorders

Purpose to characterize and relate the findings of the acoustic reflex of the stapedial muscle in individuals diagnosed with Auditory Processing Disorder. Methods descriptive retrospective cross-sectional research submitted and approved by the Ethics in Research Committee, under protocol number 0047/11. The sample consisted of 83 individuals (57 males and 26 females), who showed abnormalities in auditory processing associated with the absence of acoustic reflex. Results and Discussion the results showed that the frequencies which lack more in the acoustic reflex both in the ipsilateral and in contralateral research were 4000 Hz, 3000 Hz and 500 Hz, respectively for both, but without significant difference in the statistical analysis. Also, in both groups the auditory skills which presented more change frequency were the speech in noise and temporal ordering which called the attention to their number when compared to other skills without significant difference in the statistical analysis performed by the Fisher, chi-square and ANOVA tests. Conclusion with shown results we can conclude that the nervous system structures for the central hearing are responsible for the bridge reflex system of the stapedial muscle, which also relate to the acoustic physiologic of the auditory skills which shows a possible relation to the lack of RA to the changes of the disorder of the (central) auditory processing