Associations Between Physiological Correlates of Cochlear Synaptopathy and Tinnitus in a Veteran Population.
Naomi F Bramhall, Sarah M Theodoroff, Garnett P McMillan and 2 others
PMID 37889209WHAT IT FOUND
Veterans with tinnitus had smaller envelope following response (EFR) magnitudes than non-Veteran controls.
The authors estimate this reduction is equivalent to 21 to 27 years of aging. Auditory brainstem response (ABR) wave I amplitude did not show a clear difference after statistical adjustment.
Key findings
01Veterans with tinnitus had an estimated 2.4 dB reduction in EFR magnitude compared to non-Veteran controls.
02This reduction in EFR magnitude is estimated to be equivalent to 21 to 27 years of aging.
03After adjusting for hearing thresholds and sex, ABR wave I amplitude did not show a clear reduction for Veterans with tinnitus compared to controls.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
Tinnitus was assessed via a single question about constant or frequent ringing, without details on frequency or duration. The Veteran tinnitus group was predominantly male (87%), limiting generalizability to female Veterans. The physiological measures cannot distinguish between synapse loss and other forms of cochlear deafferentation. The study is cross-sectional, so it cannot prove that synaptopathy causes tinnitus, only that they are associated.
Declared interests
The authors declare no relevant conflicts of interest.
The easy way to misread this
Do not interpret the ABR wave I amplitude as a reliable clinical marker for tinnitus-related synaptopathy based on this study, as the modeled results showed no clear difference after adjusting for other factors.