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Hearing Disorders: HELP
Articles from Rotman Research Institute Baycrest
Based on 3 articles published since 2010

These are the 3 published articles about Hearing Disorders that originated from Rotman Research Institute Baycrest during 2010-2020.
+ Citations + Abstracts
1 Review Turning down the noise: the benefit of musical training on the aging auditory brain. 2014

Alain, Claude / Zendel, Benjamin Rich / Hutka, Stefanie / Bidelman, Gavin M. ·Rotman Research Institute, Baycrest Centre for Geriatric Care, Canada; Department of Psychology, University of Toronto, Canada. Electronic address: calain@research.baycrest.org. · International Laboratory for Brain, Music and Sound Research (BRAMS), Département de Psychologie, Université de Montréal, Québec, Canada; Centre de Recherche, Institut Universitaire de Gériatrie de Montréal, Québec, Canada. · Rotman Research Institute, Baycrest Centre for Geriatric Care, Canada; Department of Psychology, University of Toronto, Canada. · Institute for Intelligent Systems & School of Communication Sciences and Disorders, University of Memphis, USA. ·Hear Res · Pubmed #23831039.

ABSTRACT: Age-related decline in hearing abilities is a ubiquitous part of aging, and commonly impacts speech understanding, especially when there are competing sound sources. While such age effects are partially due to changes within the cochlea, difficulties typically exist beyond measurable hearing loss, suggesting that central brain processes, as opposed to simple peripheral mechanisms (e.g., hearing sensitivity), play a critical role in governing hearing abilities late into life. Current training regimens aimed to improve central auditory processing abilities have experienced limited success in promoting listening benefits. Interestingly, recent studies suggest that in young adults, musical training positively modifies neural mechanisms, providing robust, long-lasting improvements to hearing abilities as well as to non-auditory tasks that engage cognitive control. These results offer the encouraging possibility that musical training might be used to counteract age-related changes in auditory cognition commonly observed in older adults. Here, we reviewed studies that have examined the effects of age and musical experience on auditory cognition with an emphasis on auditory scene analysis. We infer that musical training may offer potential benefits to complex listening and might be utilized as a means to delay or even attenuate declines in auditory perception and cognition that often emerge later in life.

2 Article Age-related hearing loss increases full-brain connectivity while reversing directed signaling within the dorsal-ventral pathway for speech. 2019

Bidelman, Gavin M / Mahmud, Md Sultan / Yeasin, Mohammed / Shen, Dawei / Arnott, Stephen R / Alain, Claude. ·Institute for Intelligent Systems, University of Memphis, Memphis, TN, USA. gmbdlman@memphis.edu. · School of Communication Sciences and Disorders, University of Memphis, 4055 North Park Loop, Memphis, TN, 38152, USA. gmbdlman@memphis.edu. · Department of Anatomy and Neurobiology, University of Tennessee Health Sciences Center, Memphis, TN, USA. gmbdlman@memphis.edu. · Department of Electrical and Computer Engineering, University of Memphis, Memphis, TN, USA. · Rotman Research Institute-Baycrest Centre for Geriatric Care, Toronto, ON, Canada. · Department of Psychology, University of Toronto, Toronto, ON, Canada. · Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada. ·Brain Struct Funct · Pubmed #31346715.

ABSTRACT: Speech comprehension difficulties are ubiquitous to aging and hearing loss, particularly in noisy environments. Older adults' poorer speech-in-noise (SIN) comprehension has been related to abnormal neural representations within various nodes (regions) of the speech network, but how senescent changes in hearing alter the transmission of brain signals remains unspecified. We measured electroencephalograms in older adults with and without mild hearing loss during a SIN identification task. Using functional connectivity and graph-theoretic analyses, we show that hearing-impaired (HI) listeners have more extended (less integrated) communication pathways and less efficient information exchange among widespread brain regions (larger network eccentricity) than their normal-hearing (NH) peers. Parameter optimized support vector machine classifiers applied to EEG connectivity data showed hearing status could be decoded (> 85% accuracy) solely using network-level descriptions of brain activity, but classification was particularly robust using left hemisphere connections. Notably, we found a reversal in directed neural signaling in left hemisphere dependent on hearing status among specific connections within the dorsal-ventral speech pathways. NH listeners showed an overall net "bottom-up" signaling directed from auditory cortex (A1) to inferior frontal gyrus (IFG; Broca's area), whereas the HI group showed the reverse signal (i.e., "top-down" Broca's → A1). A similar flow reversal was noted between left IFG and motor cortex. Our full-brain connectivity results demonstrate that even mild forms of hearing loss alter how the brain routes information within the auditory-linguistic-motor loop.

3 Article Hearing impairment, cognition and speech understanding: exploratory factor analyses of a comprehensive test battery for a group of hearing aid users, the n200 study. 2016

Rönnberg, Jerker / Lunner, Thomas / Ng, Elaine Hoi Ning / Lidestam, Björn / Zekveld, Adriana Agatha / Sörqvist, Patrik / Lyxell, Björn / Träff, Ulf / Yumba, Wycliffe / Classon, Elisabet / Hällgren, Mathias / Larsby, Birgitta / Signoret, Carine / Pichora-Fuller, M Kathleen / Rudner, Mary / Danielsson, Henrik / Stenfelt, Stefan. ·a Department of Behavioural Sciences and Learning , Linköping University , Linköping , Sweden . · b Linnaeus Centre HEAD , Swedish Institute for Disability Research, Linköping University , Linköping , Sweden . · c Department of Clinical and Experimental Medicine , Linköping University , Linköping , Sweden . · d Eriksholm Research Centre , Oticon A/S, Rørtangvej 20, 3070 Snekkersten , Denmark . · e Section Ear & Hearing, Dept. of Otolaryngology-Head and Neck Surgery and EMGO Institute, VU University Medical Center , Amsterdam , The Netherlands . · f Department of Building, Energy and Environmental Engineering , University of Gävle , Gävle , Sweden . · g Department of Psychology , University of Toronto , Toronto , Ontario , Canada . · h The Toronto Rehabilitation Institute, University Health Network , Toronto , Ontario , Canada , and. · i The Rotman Research Institute, Baycrest Hospital , Toronto , Ontario , Canada. ·Int J Audiol · Pubmed #27589015.

ABSTRACT: OBJECTIVE: The aims of the current n200 study were to assess the structural relations between three classes of test variables (i.e. HEARING, COGNITION and aided speech-in-noise OUTCOMES) and to describe the theoretical implications of these relations for the Ease of Language Understanding (ELU) model. STUDY SAMPLE: Participants were 200 hard-of-hearing hearing-aid users, with a mean age of 60.8 years. Forty-three percent were females and the mean hearing threshold in the better ear was 37.4 dB HL. DESIGN: LEVEL1 factor analyses extracted one factor per test and/or cognitive function based on a priori conceptualizations. The more abstract LEVEL 2 factor analyses were performed separately for the three classes of test variables. RESULTS: The HEARING test variables resulted in two LEVEL 2 factors, which we labelled SENSITIVITY and TEMPORAL FINE STRUCTURE; the COGNITIVE variables in one COGNITION factor only, and OUTCOMES in two factors, NO CONTEXT and CONTEXT. COGNITION predicted the NO CONTEXT factor to a stronger extent than the CONTEXT outcome factor. TEMPORAL FINE STRUCTURE and SENSITIVITY were associated with COGNITION and all three contributed significantly and independently to especially the NO CONTEXT outcome scores (R(2) = 0.40). CONCLUSIONS: All LEVEL 2 factors are important theoretically as well as for clinical assessment.