Document Detail

Contribution to the differentiation of peripheral versus central tinnitus via auditory brain stem response evaluation.
MedLine Citation:
PMID:  4004647     Owner:  NLM     Status:  MEDLINE    
Auditory brain stem response (ABR) parameters were evaluated in 54 subjects with unilateral idiopathic subjective tinnitus in order to verify the possibility of detecting its site of origin. All the subjects had normal hearing or a symmetrical bilateral sensorineural hearing loss. All the cases in whom middle or inner ear disease had been diagnosed, were excluded. Subjects, classified on the basis of their mean auditory threshold and masking curves according to Feldmann, underwent a residual inhibition (RI) test and ipsilateral narrow-band noise masking before a second ABR test was performed. Patients with positive RI made up the A+ group, while those with negative RI made up the A- group. The main characteristics observed were an increase of the mean latency values of wave I in the tinnitus ear in the A+ group while, after masking, the values of the affected and unaffected ears almost overlapped. An increase in the latency values of wave V, unaffected by the masking procedure, could be observed in A- patients. The occurrence of waves I and III was often affected in the tinnitus ears in both groups, but it increased, after masking, only in the A- patients. Based on the obtained data, the authors conclude that there may be a substantial difference concerning ABR parameters between the patients in whom residual tinnitus masking is demonstrable compared with those in whom it is not.
M Maurizi; F Ottaviani; G Paludetti; G Almadori; A Tassoni
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Audiology : official organ of the International Society of Audiology     Volume:  24     ISSN:  0020-6091     ISO Abbreviation:  Audiology     Publication Date:  1985  
Date Detail:
Created Date:  1985-06-24     Completed Date:  1985-06-24     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  1273752     Medline TA:  Audiology     Country:  SWITZERLAND    
Other Details:
Languages:  eng     Pagination:  207-16     Citation Subset:  IM    
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MeSH Terms
Evoked Potentials, Auditory*
Hearing Loss, Sensorineural / diagnosis
Middle Aged
Neural Inhibition
Perceptual Masking
Reaction Time
Tinnitus / diagnosis*

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