Key Takeaways Mice with noise-induced hearing loss developed hyperacusis-like symptoms, showing sustained brain hyperactivity to neutral sounds and abnormal arousal. This peripheral hearing damage distorted emotional sound processing in the amygdala, making the mice unable to distinguish between threatening and non-threatening sounds. Brief optogenetic stimulation of cortical inhibitory cells permanently reversed the brain hyperactivity, normalized…
Key Takeaways Patients with Idiopathic Sudden Sensorineural Hearing Loss (ISSHL) who have normal results on specific vestibular tests are significantly more likely to recover their hearing. A normal video head impulse test (vHIT) for the horizontal canal triples the odds of recovery; a normal test for the posterior canal increases the odds nearly seven-fold. A…
Children and adolescents with allergic rhinitis (AR) show measurable signs of hearing damage that standard tests often miss. A new study of 90 participants found significant differences in a range of sensitive auditory measures between those with AR and healthy controls, pointing to a form of hidden hearing loss. The research, led by Shang Gao,…
Key Takeaways Frequency-to-place mismatch in cochlear implants—where electrode signals don’t align with the natural tonotopic map of the cochlea—is linked to poorer speech perception outcomes, particularly for consonant recognition. In a study of 35 CI users, the negative effect of mismatch was strongest for consonant perception three months after activation, even after rigorous statistical correction….
Hyperacusis is associated with tinnitus much more frequently than the other way around. This striking correlation, where up to 60% of people with hyperacusis also have tinnitus, strongly suggests a shared origin. Researchers Holger Schulze and Achim Schilling propose a novel theoretical model that locates this common ground in a specific brainstem structure, offering a…
Key Takeaways fMRI detects specific brain activity patterns that can distinguish between conditions like tinnitus, hyperacusis, and vestibular migraine, aiding more precise diagnosis. Brain connectivity patterns seen on fMRI scans can predict a patient’s long-term prognosis, helping to guide treatment expectations. The scans show that chronic sensory symptoms like tinnitus can lead to widespread brain…
Key Takeaways Patients with non-auditory tinnitus related to cerebral venous congestion show reduced blood flow in specific left-brain regions, including the insula and precentral gyrus. Lower cerebral blood flow in these patients is linked to longer tinnitus duration, worse sleep quality, and higher depression scores. The affected brain areas are part of networks controlling attention,…
⚡ Preprint Alert: This study has not yet been peer-reviewed. Findings should be interpreted with caution
A systematic review of 11 MRI studies has identified consistent patterns of structural, functional, and connective brain changes in people with hyperacusis. The work by Rania Alkahtani, Reem Elbeltagy, and Zuhal Y. Hamd consolidates evidence that this sound sensitivity condition involves measurable alterations far beyond the ear. Key Takeaways Functional MRI shows auditory brain regions,…
Key Takeaways Mice with noise-induced hearing loss developed hyperacusis-like symptoms, with the brain’s fear center (amygdala) becoming hyperactive and overly connected to arousal signals. This maladaptive brain change caused the mice to lose the ability to distinguish between threatening and safe sounds, leading to persistent fear responses to neutral noises. Researchers reversed these effects by…
Key Takeaways Audiovisual congruency only boosts the intensity of ASMR when viewing actions from a first-person perspective, not a third-person view. Visual perspective is a dominant factor in how our brains combine sight and sound to trigger sensory responses like ASMR. The findings suggest sensory integration for ASMR depends on a sense of personal, embodied…
⚡ Preprint Alert: This study has not yet been peer-reviewed. Findings should be interpreted with caution
