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Prefrontal cortex based sex differences in tinnitus perception: same tinnitus intensity, same tinnitus distress,
Sven Vanneste1, Kathleen Joos, Dirk De Ridder
1Brain, TRI & Department of Neurosurgery, University Hospital Antwerp, Belgium. sven.vanneste@ua.ac.be
Plos One
|February 21, 2012
Summary
Female tinnitus patients exhibit distinct brain activity patterns, particularly in emotional processing regions, compared to males. These differences in functional connectivity may explain higher reported depression levels in females, despite similar tinnitus distress.
Area of Science:
- Neuroscience
- Auditory Neuroscience
- Psychiatry
Background:
- Tinnitus, an auditory phantom sensation, affects 2% of the population, severely impacting quality of life due to distress.
- While overall distress is similar, females report greater impacts on pain, sleep, and depression.
- Females with depressive symptoms show heightened emotional attention and reduced use of anti-rumination strategies.
Purpose of the Study:
- To investigate sex-based differences in resting-state brain activity and connectivity in tinnitus patients.
- Utilize resting-state electroencephalography (EEG) to compare male and female tinnitus patient brain function.
Main Methods:
- Resting-state electroencephalography (EEG) was employed.
- Brain activity and functional connectivity were analyzed in male and female tinnitus patient groups.
- Comparison between male tinnitus patients and a male control group was performed.
Main Results:
- Females scored higher on the Beck Depression Inventory-II (BDI-II).
- Significant differences in beta1 and beta2 activity were observed in the orbitofrontal cortex (OFC) and frontopolar cortex in females.
- Increased alpha connectivity was found between the OFC, insula, sgACC, PHC, and auditory cortex in females.
- Differences in beta3 activity in the posterior cingulate cortex (PCC) were noted in males compared to controls.
Conclusions:
- Sex influences brain activity and connectivity in tinnitus patients, particularly in emotion-related areas.
- Enhanced functional connectivity in females links auditory cortex activity to emotion-related areas (PHC-sgACC), potentially explaining higher depression.
- The PCC may play a role in cognitive and memory aspects of tinnitus perception.
- Future tinnitus research, especially functional imaging, must account for sex-based differences.
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