[Tinnitus and psychiatric comorbidities]

Tinnitus is an auditory phantom phenomenon characterized by the sensation of sounds without objectively identifiable sound sources. To date, its causes are not well understood. The perceived severity of tinnitus correlates more closely to psychological and general health factors than to audiometric parameters. Together with limbic structures in the ventral striatum, the prefrontal cortex forms an internal "noise cancelling system", which normally helps to block out unpleasant sounds, including the tinnitus signal. If this pathway is compromised, chronic tinnitus results. Patients with chronic tinnitus show increased functional connectivity in corticolimbic pathways. Psychiatric comorbidities are common in patients who seek help for tinnitus or hyperacusis. Clinicians need valid screening tools in order to identify patients with psychiatric disorders and to tailor treatment in a multidisciplinary setting.