Study of tonotopic brain changes with functional MRI and FDG-PET in a patient with unilateral objective cochlear tinnitus.

Details

Serval ID
serval:BIB_10A357BEF736
Type
Article: article from journal or magazin.
Publication sub-type
Case report (case report): feedback on an observation with a short commentary.
Collection
Publications
Institution
Title
Study of tonotopic brain changes with functional MRI and FDG-PET in a patient with unilateral objective cochlear tinnitus.
Journal
Hearing research
Author(s)
Guinchard A.C., Ghazaleh N., Saenz M., Fornari E., Prior J.O., Maeder P., Adib S., Maire R.
ISSN
1878-5891 (Electronic)
ISSN-L
0378-5955
Publication state
Published
Issued date
11/2016
Peer-reviewed
Oui
Volume
341
Pages
232-239
Language
english
Notes
Publication types: Case Reports ; Journal Article
Publication Status: ppublish
Abstract
We studied possible brain changes with functional MRI (fMRI) and fluorodeoxyglucose positron emission tomography (FDG-PET) in a patient with a rare, high-intensity "objective tinnitus" (high-level SOAEs) in the left ear of 10 years duration, with no associated hearing loss. This is the first case of objective cochlear tinnitus to be investigated with functional neuroimaging. The objective cochlear tinnitus was measured by Spontaneous Otoacoustic Emissions (SOAE) equipment (frequency 9689 Hz, intensity 57 dB SPL) and is clearly audible to anyone standing near the patient. Functional modifications in primary auditory areas and other brain regions were evaluated using 3T and 7T fMRI and FDG-PET. In the fMRI evaluations, a saturation of the auditory cortex at the tinnitus frequency was observed, but the global cortical tonotopic organization remained intact when compared to the results of fMRI of healthy subjects. The FDG-PET showed no evidence of an increase or decrease of activity in the auditory cortices or in the limbic system as compared to normal subjects. In this patient with high-intensity objective cochlear tinnitus, fMRI and FDG-PET showed no significant brain reorganization in auditory areas and/or in the limbic system, as reported in the literature in patients with chronic subjective tinnitus.

Keywords
Acoustic Stimulation, Adult, Audiology, Auditory Cortex/physiology, Auditory Cortex/physiopathology, Brain/physiopathology, Cochlea/physiopathology, Fluorodeoxyglucose F18, Humans, Magnetic Resonance Imaging, Male, Neuroimaging, Otoacoustic Emissions, Spontaneous, Positron-Emission Tomography, Tinnitus/physiopathology, Auditory cortex, Human neuroimaging, Objective tinnitus, Tonotopy
Pubmed
Web of science
Open Access
Yes
Create date
29/09/2016 19:03
Last modification date
20/08/2019 13:37
Usage data