title: [Central low frequency hearing loss].
abstract: OBJECTIVE
  To study the pathogenesis of the bilateral central low frequency hearing loss.
  
  
  METHODS
  Audiologic findings [auditory brainstem response(ABR), evoked otoacoustic emission (EOAE), et al] of 101 cases with bilateral central low frequency hearing loss were studied.
  
  
  RESULTS
  The typical clinical manifestations of bilateral central low frequency hearing loss were normal EOAE which cannot be suppressed by contralateral white noise, abnormal ABR, no acoustic reflex and--SP/AP > 0.44.
  
  
  CONCLUSIONS
  The results suggest that cochlear outer hair cells are normal in function with dysfunction of the cochlear nuclei. The main lesion of the disease are neural pathways related to Acoustic reflex and medial olivo-cochlear efferent nervous system. The cochlear afferent nerve may also be involved.
authors.affiliation: Department of Otorhinolaryngology Head and Neck Surgery, General Hospital of PLA, Beijing 100853, China. gur99@263.net
authors.forename: R
authors.initials: R
authors.lastname: Gu
authors.forename: J
authors.initials: J
authors.lastname: Zheng
authors.forename: L
authors.initials: L
authors.lastname: Yu
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006313:Hearing Loss, Central / Q000175:diagnosis* / Q000503:physiopathology; D006320:Hearing Tests; D006801:Humans; D008297:Male; D008875:Middle Aged