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Auditory brainstem implants (ABIs) can provide highly beneficial hearing sensations to individuals deafened by bilateral vestibular schwannomas (neurofibromatosis type 2). Relatively little is known about the status of stimulated neurons after long-term ABI use. Direct examination of the cochlear nuclear complex (CN) of one 5-year ABI user indicated no deleterious effect. Recently, we examined the brainstem of a patient who used his ABI daily for 15 years with excellent performance. There was good preservation of CN cell size, morphology, and packing density, a very favorable sign considering that a number of infants are now receiving ABIs.
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http://dx.doi.org/10.1002/lary.22491 | DOI Listing |
Eur J Pharm Sci
September 2025
Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea. Electronic address:
Intratympanic (IT) delivery of dexamethasone (DEX) is widely used for treating inner ear disorders; however, its therapeutic efficacy is limited by poor permeability of the round window membrane (RWM). This study aimed to evaluate and compare the efficacy and safety of three pharmacological agents-histamine (HIS), 3% hypertonic saline (3% HS), and sodium caprate (SC)-as adjuvants for enhancing RWM permeability and improving IT-DEX delivery in a murine model. Following IT administration of each permeability enhancer followed by DEX injection, perilymph DEX concentrations were measured using ultra-high-performance liquid chromatography, and DEX receptor expression in the organ of Corti was assessed by immunofluorescence.
View Article and Find Full Text PDFNeuroscience
September 2025
Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China. Electronic address:
The auditory brainstem response (ABR) remains the gold standard for evaluating hearing function in both animal models and humans. Features of ABR, including threshold, wave I amplitude and latency are critical for diagnosing and investigating the mechanisms of hearing loss. Critically, the rapid proliferation of genetically engineered mouse models in hearing research has created an imperative demand for high-throughput ABR testing capabilities.
View Article and Find Full Text PDFPLoS Biol
September 2025
Neuroscience Training Program, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States of America.
Early sensory experience can exert lasting perceptual consequences. For example, a brief period of auditory deprivation early in life can lead to persistent spatial hearing deficits. Some forms of hearing loss (i.
View Article and Find Full Text PDFJ Oral Maxillofac Surg
August 2025
Associate Professor, Department of Dentistry, Government Medical College, Nagpur, Maharashtra, India.
Background: Cleft palate repair aims to achieve tension-free closure without compromising Eustachian tube function and hearing outcomes. The effect of pterygoid hamulotomy on postoperative hearing remains inconclusive.
Purpose: This study evaluated the effect of pterygoid hamulotomy during palatoplasty on hearing thresholds and middle ear status in nonsyndromic cleft palate patients.
Objective: This study aims to evaluate long-term auditory outcomes in patients with inner ear malformations (IEMs) treated with cochlear or auditory brainstem implants (CI/ABI), and to assess the influence of anatomical subtype, electrode design, insertion depth, and genetic/syndromic background on hearing performance over a 10-year follow-up.
Methods: We conducted a prospective cohort study including patients with radiologically confirmed IEMs and bilateral severe-to-profound hearing loss, all of whom underwent implantation and completed at least 10 years of follow-up. Outcomes were assessed using pure-tone average (PTA) and speech recognition scores (SRS) at defined intervals.