Downloaded from http://journals.tums.ac.ir/ on Tuesday, April 10, 2012 Tel: Tel: 009821-22228051-2 263, ext. E-mail: [email protected] NezamSciences, Shahnazari Alley,Shahid St., Madar Square, Mirdamad Blvd., Tehran, 15459-13487, Iran. 1 Corresponding author attention, auditory top-down pathways,efferent processing auditory cortex, Keywords: onthefrequencycortex pathways peripheral auditory a via in specificway. system corticofugal auditory ofresults for providedIn evidence influence otoacoustic suppression. these emissions fact, enhanced auditory byincrease contralateral attention of selective stimulus-frequency the magnitude Conclusion: suppression was emissions seenstimulus-frequency at 2KHz. otoacoustic was (p auditoryemissions observedin conditions attention selective Results: backgroundat 1000,2000,and 4000KHz. noise auditoryattention oncontralateral detect suppression, to subjects were in target tones instructed of Besides, effect a evaluate orderto the weretext. in instructedauditory read to attention, subjects wasfrequency recorded emissions otoacoustic the in right ear In at 2KHz. eliminate orderto the years)age: 21.9 cross-sectional this participated in suppression study.of stimulus- Contralateral Methods: mode. specific frequency analyzed investigate to modification of peripheral the auditory auditory by system activityincortex effect attentiononstimulus-frequency (SFOAE)was of emissions auditory selective otoacoustic evidence thatmedial olivocochlear descendingIn bundle receives from input the cortex. study, this the Background and Aim: Abstract Received: 25 November 2010,accepted: 4March 2011 2 RostamiSoheila Article Research Audiol. 2011;20(2):63-71. - - Department Audiology, of Rehabilitation, Facultyof Tehran University of Medical Sciences, Iran Department of Rehabilitaion Management, Faculty Rehabilitation, of Tehran University Medical of Sciences, Iran Iran The effects of auditoryselectiveThe effectsof on attention contralateral suppression of stimulus-frequency otoacousticsuppression of stimulus-frequency emissions A Thirty-six normal hearing adult subjects with their age ranging from 18 to 30 years (mean 30 to from 18 their ranging with age adultsubjects hearing normal Thirty-six Contralateral suppression, stimulus-frequency auditory emissions, otoacoustic selective significant increase at contralateral suppression of stimulus-frequency otoacoustic contralateral increase stimulus-frequency otoacoustic atsuppressionsignificant of The results of this study indicated that activities the medial of olivocochlear bundle 1 , Akram Pourbakht : Department Audiology, of Faculty Rehabilitation, of University Tehran Medical of To date, auditoryremains the function unclear. of is system efferent There 1 , Mohammad Kamali 2 , Bahram Jalaee ≤ 0.001). The magnitude of largest
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