Document Detail

Several mechanical manipulations of the wall of the inner ear do not affect air and bone conduction auditory thresholds.
MedLine Citation:
PMID:  21370683     Owner:  NLM     Status:  In-Process    
OBJECTIVES: According to classic theories, auditory stimulation, whether air- or bone-conducted, has been thought to begin with sound-induced relative motion between the cochlear shell and the stapes footplate, producing a passive mechanical traveling wave along the basilar membrane. This study was designed to assess the effect of experimental mechanical manipulations of the cochlea on the auditory thresholds to air-conducted and bone-conducted stimulation.
METHODS: The left ear of Psammomys obesus (highest auditory sensitivity between 0.5 and 5.0 kHz) was initially ablated in all animals studied. After baseline recording of auditory nerve-brain stem evoked response (ABR) thresholds to air- and bone-conducted broadband click stimulation from the right ear, a hole was drilled in the vestibule of that ear in 3 animals. In 2 other animals, the round window of the animals was immobilized. In 3 additional animals, the round window was widely perforated. Repeat ABR thresholds were then determined.
RESULTS: There was no change in ABR thresholds to both air- and bone-conducted stimulation following these manipulations. The ABR wave latency also did not change.
CONCLUSIONS: It is likely that an alternative mode of cochlear excitation is possible.
Ronen Perez; Cahtia Adelman; Haim Sohmer
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Annals of otology, rhinology, and laryngology     Volume:  120     ISSN:  0003-4894     ISO Abbreviation:  Ann. Otol. Rhinol. Laryngol.     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-03-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0407300     Medline TA:  Ann Otol Rhinol Laryngol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  66-70     Citation Subset:  AIM; IM    
Department of Otolaryngology-Head and Neck Surgery, Shaare Zedek Medical Center, Jerusalem, Israel.
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