title: Auditory cortex is implicated in tinnitus distress: a voxel-based morphometry study.
abstract: Neuroimaging studies of tinnitus suggest the involvement of wide-spread neural networks for perceptual, attentional, memory, and emotional processes encompassing auditory, frontal, parietal, and limbic areas. Despite sparse findings for tinnitus duration and laterality, tinnitus distress has been shown to be related to changes in non-auditory cortical areas. The aim of this study was to correlate tinnitus characteristics with grey matter volume in two large samples of tinnitus patients. High-resolution brain images were obtained using a 1.5 T magnetic resonance imaging scanner and analysed by means of voxel-based morphometry. In sample one (n = 257), tinnitus distress correlated negatively with grey matter volume in bilateral auditory areas including the Heschl's gyrus and insula, that is, the higher the tinnitus distress the lower the grey matter volume. The effects of this correlation were small, but stable after correction for potential confounders such as age, gender, and audiometric parameters. This negative correlation was replicated in a second independent sample (n = 78). Our results support the notion that the role of the auditory cortex in tinnitus is not restricted to perceptual aspects. The distress observed was dependent on grey matter alterations in the auditory cortex, which could reflect reverberations between perceptual and distress networks.
authors: Department of Psychiatry and Psychotherapy, University of Regensburg, Universitätsstraße 84, 93053 Regensburg, Germany. martin.schecklmann@medbo.de
authors: Martin
authors: M
authors: Schecklmann
authors: Astrid
authors: A
authors: Lehner
authors: Timm B
authors: TB
authors: Poeppl
authors: Peter M
authors: PM
authors: Kreuzer
authors: Rainer
authors: R
authors: Rupprecht
authors: Julia
authors: J
authors: Rackl
authors: Julia
authors: J
authors: Burger
authors: Elmar
authors: E
authors: Frank
authors: Göran
authors: G
authors: Hajak
authors: Berthold
authors: B
authors: Langguth
authors: Michael
authors: M
authors: Landgrebe
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001303:Auditory Cortex / Q000473:pathology / Q000503:physiopathology*; D005260:Female; D005858:Germany; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D059906:Neuroimaging; D009929:Organ Size; D012044:Regression Analysis; D014012:Tinnitus / Q000503:physiopathology*