| Autor: |
Ward, J., Rinaldi, L., Ronen, I., Agbude, R., Forster, S., Makowski, D., Simner, J. |
| Předmět: |
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| Zdroj: |
Journal of Hearing Science; Sep2024, Vol. 14 Issue 3, p65-66, 2p |
| Abstrakt: |
Misophonia and hyperacusis are typically defined in terms of a narrow versus broad range of trigger sounds and are often linked to different aspects of a sound (sound meaning for misophonia, loudness for hyperacusis). However, co-morbidity between these conditions suggests possible mechanistic overlap. In two studies we examine the neurochemical and psychophysiological basis of misophonia (using a validated questionnaire) and hyperacusis (based on uncomfortable loudness thresholds). The technique of magnetic resonance spectroscopy (MRS) uses MRI to estimate the concentration of excitatory and inhibitory neurotransmitters in the brain, enabling us to explore whether either type of sound intolerance is linked to general levels of excitability in key regions of the brain (auditory cortex, insula). No differences were found. In a separate experimental study, participants engaged in an attention-demanding visual task whilst concurrently measuring responsiveness to task-irrelevant sounds (in terms of level of distraction, psychophysiological responsiveness). Here we do find that different aspects of the task are differentially sensitive to misophonia and hyperacusis. Misophonia is linked to heightened responsiveness to sounds whereas hyperacusis is linked hyper-vigilance. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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