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Kim G, Khan RA, Tai Y, Shahsavarani S, Husain FT. Gray matter volumetric changes in tinnitus: The impact of hearing loss and severity. Brain Res 2024; 1846:149264. [PMID: 39369776 DOI: 10.1016/j.brainres.2024.149264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2024] [Revised: 09/12/2024] [Accepted: 10/03/2024] [Indexed: 10/08/2024]
Abstract
Tinnitus is a phantom auditory sensation that commonly co-occurs with hearing loss. Both tinnitus and hearing loss can impact the quality of life, emotional well-being, and cognitive functioning of the affected individuals. While previous studies have highlighted structural alterations in hearing loss and/or tinnitus, the fundamental neural mechanisms underpinning tinnitus severity remain poorly understood. In this study, we conducted a voxel-based morphometry to investigate gray matter (GM) volume differences among groups of participants with varying tinnitus severity and hearing status, and controls within a large sample. We observed reduced GM volume in the left anterior insula and right planum polare in participants with hearing loss, regardless of their tinnitus status, compared to normal hearing controls. We noted decreased GM volume in the bilateral anterior and posterior insula for those with tinnitus and normal hearing compared to a normal hearing control group. Further, the tinnitus with hearing loss group showed decreased GM volume in the left planum polare, left inferior temporal gyrus, bilateral anterior temporal gyri, and right superior frontal gyrus compared to the normal hearing control group, suggesting a combined effect of hearing loss and tinnitus. While tinnitus severity did not show a significant overall effect, there was a significant positive correlation between tinnitus distress and GM volume in bilateral planum polare. Our findings enhance the understanding of structural brain changes related to hearing loss and tinnitus, and advance the overall knowledge of tinnitus pathophysiology, which can contribute to the development of more effective treatments for tinnitus.
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Affiliation(s)
- Gibbeum Kim
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Champaign, IL 61801, United States; Department of Speech and Hearing Science, University of Illinois at Urbana-Champaign, Champaign, IL 61820, United States
| | - Rafay A Khan
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Champaign, IL 61801, United States; Neuroscience Program, University of Illinois at Urbana-Champaign, Champaign, IL 61801, United States
| | - Yihsin Tai
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Champaign, IL 61801, United States; Department of Speech and Hearing Science, University of Illinois at Urbana-Champaign, Champaign, IL 61820, United States; Department of Speech Pathology and Audiology, Ball State University, Muncie, IN 47306, United States
| | - Somayeh Shahsavarani
- Department of Speech and Hearing Science, University of Illinois at Urbana-Champaign, Champaign, IL 61820, United States; Neuroscience Program, University of Illinois at Urbana-Champaign, Champaign, IL 61801, United States; Department of Audiology, San Jose State University, San Jose, CA 95192, United States
| | - Fatima T Husain
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Champaign, IL 61801, United States; Department of Speech and Hearing Science, University of Illinois at Urbana-Champaign, Champaign, IL 61820, United States; Neuroscience Program, University of Illinois at Urbana-Champaign, Champaign, IL 61801, United States.
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2
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Hu W, Xu D, Xing Q. Probe into the treatment of tinnitus by acupuncture combined with medicine under the mechanism of pathophysiology: A review. Medicine (Baltimore) 2024; 103:e39832. [PMID: 39331935 PMCID: PMC11441956 DOI: 10.1097/md.0000000000039832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/29/2024] Open
Abstract
Tinnitus is a common medical disorder. The risk factors include hearing loss, ototoxic medications, head injuries, and depression. Therefore, ear disorders, anxiety, and depression should be considered in the treatment of tinnitus. Although considerable research has been conducted on the pathogenesis and treatment of tinnitus, there is currently no effective treatment. Traditional Chinese medicine (TCM) has a certain effect on tinnitus and a large number of clinical trials have been conducted. Its treatment methods vary and include TCM, acupuncture, and music therapy. TCM treatment of tinnitus usually takes the method of comprehensive treatment, not only relying on drugs but also safety. Therefore, this review explores the treatment of tinnitus using acupuncture combined with medicine, based on the new pathophysiological mechanism of tinnitus.
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Affiliation(s)
- Wenhui Hu
- The Eighth Medical Center of Chinese PLA General Hospital & Medical School, Beijing, China
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3
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Han SY, Kim H, Yun Y, Lee MJ, Lee JY, Park SW, Kim YK, Kim YH. Comparative study on structural and functional brain differences in mild cognitive impairment patients with tinnitus. Front Aging Neurosci 2024; 16:1470919. [PMID: 39286459 PMCID: PMC11402673 DOI: 10.3389/fnagi.2024.1470919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2024] [Accepted: 08/20/2024] [Indexed: 09/19/2024] Open
Abstract
Objective Tinnitus may be associated with various brain changes. However, the degenerative changes in patients with tinnitus have not been extensively investigated. We aimed to evaluate degenerative, structural, and functional brain changes in patients with mild cognitive impairment (MCI) who also suffer from tinnitus. Materials and methods This study included participants aged 60 to 80 years with MCI and a hearing level better than 40 dB. The participants were classified into two groups: MCI with tinnitus (MCI-T) and MCI without tinnitus (MCI-NT). All patients underwent Tinnitus Handicap Inventory (THI), 3 T brain MRI, F18-florapronol PET, and F18-FDG PET. Results The MCI-T group exhibited higher β-amyloid deposition in the superior temporal gyrus, temporal pole, and middle temporal gyrus compared to the MCI-NT group (p < 0.05 for all). Additionally, the MCI-T group showed increased metabolism in the inferior frontal gyrus, insula, and anterior cingulate cortex (ACC) (p < 0.005 for all). The THI score was strongly correlated with increased volume in the insula, ACC, superior frontal gyrus, supplementary motor area, white matter near the hippocampus, and precentral gyrus (p < 0.05 for all). Moreover, the MCI-T group demonstrated higher metabolic activity in the default mode network (DMN) and lower activity in the executive control network (ECN) (p < 0.05 for all). In the MCI-T group, the posterior DMN was positively correlated with the visual network and negatively with the ECN, whereas in the MCI-NT group, it correlated positively with the ECN. Conclusion The MCI-T group exhibited greater β-amyloid accumulation in the auditory cortex and more extensive changes across various brain networks compared with the MCI-NT group, potentially leading to diverse clinical symptoms such as dementia with semantic deficits or depression. Tinnitus in MCI patients may serve as a biomarker for degenerative changes in the temporal lobe and alterations in brain network dynamics.
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Affiliation(s)
- Sang-Yoon Han
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Hanyang University, Seoul, Republic of Korea
| | - Heejung Kim
- Department of Nuclear Medicine, Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
- Institute of Radiation Medicine, Medical Research Center, Seoul National University, Seoul, Republic of Korea
| | - Yejin Yun
- Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Min Jae Lee
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jun-Young Lee
- Department of Psychiatry, Seoul National University College of Medicine and Boramae Medical Center, Seoul, Republic of Korea
| | - Sun-Won Park
- Department of Radiology, Seoul National University College of Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Republic of Korea
| | - Yu Kyeong Kim
- Department of Nuclear Medicine, Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Young Ho Kim
- Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Otorhinolaryngology-Head and Neck Surgery, Boramae Medical Center, SMG-SNU, Seoul, Republic of Korea
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4
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Bai Y, Zhang B, Feng T. Neural basis responsible for effect of grit on procrastination: The interaction between the self-regulation and motivation neural pathways. Prog Neuropsychopharmacol Biol Psychiatry 2024; 134:111037. [PMID: 38795822 DOI: 10.1016/j.pnpbp.2024.111037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 05/07/2024] [Accepted: 05/22/2024] [Indexed: 05/28/2024]
Abstract
Procrastination has a detrimental impact on academic performance, health, and subjective well-being. Previous studies indicated that grit was negatively related to procrastination. However, the underlying neural basis of this relationship remains unclear. To address this issue, we utilized voxel-based morphometry (VBM) and resting-state functional connectivity (RSFC) analysis to identify the neural substrates of how is grit linked to procrastination. Behavioral results showed that procrastination was negatively associated with grit. VBM analysis revealed that gray matter volume (GMV) in the left precuneus was positively associated with the consistency of interest (CI), a subcomponent of grit, while the right medial orbital frontal cortex (mOFC) was positively correlated with the perseverance of effort (PE), another subcomponent of grit. Moreover, the RSFC analysis indicated that both precuneus-medial superior frontal gyrus (mSFG) and precuneus-insula connectivity were positively related to CI, while the functional coupling of right mOFC with left anterior cingulate cortex (ACC) was positively related to PE. Importantly, the structural equation modeling (SEM) results were well suited for the influence of grit on procrastination via both self-regulation (mOFC-ACC) and motivation pathways (precuneus-mSFG, precuneus-insula). Together, these findings imply that self-regulation and motivation could be two neural circuits underlying the impact of grit on procrastination.
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Affiliation(s)
- Youling Bai
- Faculty of Psychology, Southwest University, Chongqing 400715, China
| | - Biying Zhang
- Faculty of Psychology, Southwest University, Chongqing 400715, China
| | - Tingyong Feng
- Faculty of Psychology, Southwest University, Chongqing 400715, China; Key Laboratory of Cognition and Personality, Ministry of Education, 400715, China.
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5
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Wang X, Chen Q, Huang Y, Lv H, Zhao P, Yang Z, Wang Z. Mendelian randomization analyses support causal relationships between tinnitus of different stages and severity and structural characteristics of specific brain regions. Prog Neuropsychopharmacol Biol Psychiatry 2024; 133:111027. [PMID: 38754695 DOI: 10.1016/j.pnpbp.2024.111027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 04/18/2024] [Accepted: 05/09/2024] [Indexed: 05/18/2024]
Abstract
This study aims to delineate the causal relationships between idiopathic tinnitus in different stages and severity and the morphological properties in specific brain regions. We utilized a two-sample bidirectional Mendelian randomization (MR) analysis to ascertain the causal effects of brain structural attributes on varying severities and stages of tinnitus. Our approach involved harnessing genetic variables derived from extensive genome-wide association studies as instrumental variables, centered mainly on pertinent single-nucleotide polymorphisms associated with tinnitus. Subsequently, we integrated this data with brain structural imaging inputs to facilitate the MR analysis. We also applied reverse MR analysis to pinpoint the critical brain regions implicated in the onset of tinnitus. Our analysis revealed a demonstrable causal relationship between tinnitus and brain structural alterations, including changes primarily within the auditory cortex and hub regions of the limbic system, as well as portions of the frontal-temporal-occipital circuit. We found that individuals exhibiting cortical thickness alterations in the bilateral peri-calcarine and right superior occipital gyrus might have previously experienced tinnitus. Changes in the cortical areas of the right rectus, left inferior frontal gyrus, and right pars-orbitalis appeared unrelated to tinnitus. Furthermore, moderate tinnitus patients showed more pronounced structural alterations. This study substantiates that tinnitus could instigate substantial structural alterations mainly within the auditory-limbic-frontal-visual system, while the reciprocal causality was not supported. Moreover, the data underscores that moderate, rather than severe, tinnitus precipitates the most significant structural changes. Morphological alterations in several specific brain areas either indicate a history of tinnitus or bear no relation to it.
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Affiliation(s)
- Xinghao Wang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, No. 95 YongAn Road, Xicheng District, Beijing 100050, China
| | - Qian Chen
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, No. 95 YongAn Road, Xicheng District, Beijing 100050, China.
| | - Yan Huang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, No. 95 YongAn Road, Xicheng District, Beijing 100050, China
| | - Han Lv
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, No. 95 YongAn Road, Xicheng District, Beijing 100050, China
| | - Pengfei Zhao
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, No. 95 YongAn Road, Xicheng District, Beijing 100050, China
| | - Zhenghan Yang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, No. 95 YongAn Road, Xicheng District, Beijing 100050, China
| | - Zhenchang Wang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, No. 95 YongAn Road, Xicheng District, Beijing 100050, China.
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6
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Belder CRS, Marshall CR, Jiang J, Mazzeo S, Chokesuwattanaskul A, Rohrer JD, Volkmer A, Hardy CJD, Warren JD. Primary progressive aphasia: six questions in search of an answer. J Neurol 2024; 271:1028-1046. [PMID: 37906327 PMCID: PMC10827918 DOI: 10.1007/s00415-023-12030-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 09/27/2023] [Indexed: 11/02/2023]
Abstract
Here, we review recent progress in the diagnosis and management of primary progressive aphasia-the language-led dementias. We pose six key unanswered questions that challenge current assumptions and highlight the unresolved difficulties that surround these diseases. How many syndromes of primary progressive aphasia are there-and is syndromic diagnosis even useful? Are these truly 'language-led' dementias? How can we diagnose (and track) primary progressive aphasia better? Can brain pathology be predicted in these diseases? What is their core pathophysiology? In addition, how can primary progressive aphasia best be treated? We propose that pathophysiological mechanisms linking proteinopathies to phenotypes may help resolve the clinical complexity of primary progressive aphasia, and may suggest novel diagnostic tools and markers and guide the deployment of effective therapies.
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Affiliation(s)
- Christopher R S Belder
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, 8 - 11 Queen Square, London, WC1N 3BG, UK
- UK Dementia Research Institute at UCL, UCL Queen Square Institute of Neurology, University College London, London, UK
- Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia
| | - Charles R Marshall
- Preventive Neurology Unit, Wolfson Institute of Population Health, Queen Mary University of London, London, UK
| | - Jessica Jiang
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, 8 - 11 Queen Square, London, WC1N 3BG, UK
| | - Salvatore Mazzeo
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, 8 - 11 Queen Square, London, WC1N 3BG, UK
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Azienda Ospedaliera-Universitaria Careggi, Florence, Italy
| | - Anthipa Chokesuwattanaskul
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, 8 - 11 Queen Square, London, WC1N 3BG, UK
- Division of Neurology, Department of Internal Medicine, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
- Cognitive Clinical and Computational Neuroscience Research Unit, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Jonathan D Rohrer
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, 8 - 11 Queen Square, London, WC1N 3BG, UK
| | - Anna Volkmer
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, 8 - 11 Queen Square, London, WC1N 3BG, UK
| | - Chris J D Hardy
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, 8 - 11 Queen Square, London, WC1N 3BG, UK
| | - Jason D Warren
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, 8 - 11 Queen Square, London, WC1N 3BG, UK.
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7
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Singh A, Smith PF, Zheng Y. Targeting the Limbic System: Insights into Its Involvement in Tinnitus. Int J Mol Sci 2023; 24:9889. [PMID: 37373034 DOI: 10.3390/ijms24129889] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/05/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Tinnitus is originally derived from the Latin verb tinnire, which means "to ring". Tinnitus, a complex disorder, is a result of sentient cognizance of a sound in the absence of an external auditory stimulus. It is reported in children, adults, and older populations. Patients suffering from tinnitus often present with hearing loss, anxiety, depression, and sleep disruption in addition to a hissing and ringing in the ear. Surgical interventions and many other forms of treatment have been only partially effective due to heterogeneity in tinnitus patients and a lack of understanding of the mechanisms of tinnitus. Although researchers across the globe have made significant progress in understanding the underlying mechanisms of tinnitus over the past few decades, tinnitus is still deemed to be a scientific enigma. This review summarises the role of the limbic system in tinnitus development and provides insight into the development of potential target-specific tinnitus therapies.
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Affiliation(s)
- Anurag Singh
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand
- Brain Health Research Centre, University of Otago, Dunedin 9016, New Zealand
- The Eisdell Moore Centre for Research in Hearing and Balance Disorders, University of Auckland, Auckland 1023, New Zealand
| | - Paul F Smith
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand
- Brain Health Research Centre, University of Otago, Dunedin 9016, New Zealand
- The Eisdell Moore Centre for Research in Hearing and Balance Disorders, University of Auckland, Auckland 1023, New Zealand
| | - Yiwen Zheng
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand
- Brain Health Research Centre, University of Otago, Dunedin 9016, New Zealand
- The Eisdell Moore Centre for Research in Hearing and Balance Disorders, University of Auckland, Auckland 1023, New Zealand
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8
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Dobel C, Junghöfer M, Mazurek B, Paraskevopoulos E, Groß J. Tinnitus and Multimodal Cortical Interaction. Laryngorhinootologie 2023; 102:S59-S66. [PMID: 37130531 PMCID: PMC10184662 DOI: 10.1055/a-1959-3021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The term of subjective tinnitus is used to describe a perceived noise without an external sound source. Therefore, it seems to be obvious that tinnitus can be understood as purely auditory, sensory problem. From a clinical point of view, however, this is a very inadequate description, as there are significant comorbidities associated with chronic tinnitus. Neurophysiological investigations with different imaging techniques give a very similar picture, because not only the auditory system is affected in chronic tinnitus patients, but also a widely ramified subcortical and cortical network. In addition to auditory processing systems, networks consisting of frontal and parietal regions are particularly disturbed. For this reason, some authors conceptualize tinnitus as a network disorder rather than a disorder of a circumscribed system. These findings and this concept suggest that tinnitus must be diagnosed and treated in a multidisciplinary and multimodal manner.
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Affiliation(s)
- Christian Dobel
- Klinik und Poliklinik für HNO-Heilkunde, Universitätsklinikum Jena, Jena
| | - Markus Junghöfer
- Institut für Biomagnetismus und Biosignalanalyse, Universität Münster, Münster
| | - Birgit Mazurek
- Tinnituszentrum, Charité - Universitätsmedizin Berlin, Berlin
| | | | - Joachim Groß
- Institut für Biomagnetismus und Biosignalanalyse, Universität Münster, Münster
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9
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McKenna MC, Lope J, Bede P, Tan EL. Thalamic pathology in frontotemporal dementia: Predilection for specific nuclei, phenotype-specific signatures, clinical correlates, and practical relevance. Brain Behav 2023; 13:e2881. [PMID: 36609810 PMCID: PMC9927864 DOI: 10.1002/brb3.2881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 12/17/2022] [Accepted: 12/18/2022] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Frontotemporal dementia (FTD) phenotypes are classically associated with distinctive cortical atrophy patterns and regional hypometabolism. However, the spectrum of cognitive and behavioral manifestations in FTD arises from multisynaptic network dysfunction. The thalamus is a key hub of several corticobasal and corticocortical circuits. The main circuits relayed via the thalamic nuclei include the dorsolateral prefrontal circuit, the anterior cingulate circuit, and the orbitofrontal circuit. METHODS In this paper, we have reviewed evidence for thalamic pathology in FTD based on radiological and postmortem studies. Original research papers were systematically reviewed for preferential involvement of specific thalamic regions, for phenotype-associated thalamic disease burden patterns, characteristic longitudinal changes, and genotype-associated thalamic signatures. Moreover, evidence for presymptomatic thalamic pathology was also reviewed. Identified papers were systematically scrutinized for imaging methods, cohort sizes, clinical profiles, clinicoradiological associations, and main anatomical findings. The findings of individual research papers were amalgamated for consensus observations and their study designs further evaluated for stereotyped shortcomings. Based on the limitations of existing studies and conflicting reports in low-incidence FTD variants, we sought to outline future research directions and pressing research priorities. RESULTS FTD is associated with focal thalamic degeneration. Phenotype-specific thalamic traits mirror established cortical vulnerability patterns. Thalamic nuclei mediating behavioral and language functions are preferentially involved. Given the compelling evidence for considerable thalamic disease burden early in the course of most FTD subtypes, we also reflect on the practical relevance, diagnostic role, prognostic significance, and monitoring potential of thalamic metrics in FTD. CONCLUSIONS Cardinal manifestations of FTD phenotypes are likely to stem from thalamocortical circuitry dysfunction and are not exclusively driven by focal cortical changes.
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Affiliation(s)
- Mary Clare McKenna
- Computational Neuroimaging Group, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Neurology, St James's Hospital, Dublin, Ireland
| | - Jasmin Lope
- Computational Neuroimaging Group, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Peter Bede
- Computational Neuroimaging Group, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Neurology, St James's Hospital, Dublin, Ireland
| | - Ee Ling Tan
- Computational Neuroimaging Group, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
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10
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Lin CT, Ghosh S, Hinkley LB, Dale CL, Souza ACS, Sabes JH, Hess CP, Adams ME, Cheung SW, Nagarajan SS. Multi-tasking deep network for tinnitus classification and severity prediction from multimodal structural MR images. J Neural Eng 2023; 20. [PMID: 36595270 DOI: 10.1088/1741-2552/acab33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 12/13/2022] [Indexed: 12/15/2022]
Abstract
Objective:Subjective tinnitus is an auditory phantom perceptual disorder without an objective biomarker. Fast and efficient diagnostic tools will advance clinical practice by detecting or confirming the condition, tracking change in severity, and monitoring treatment response. Motivated by evidence of subtle anatomical, morphological, or functional information in magnetic resonance images of the brain, we examine data-driven machine learning methods for joint tinnitus classification (tinnitus or no tinnitus) and tinnitus severity prediction.Approach:We propose a deep multi-task multimodal framework for tinnitus classification and severity prediction using structural MRI (sMRI) data. To leverage complementary information multimodal neuroimaging data, we integrate two modalities of three-dimensional sMRI-T1 weighted (T1w) and T2 weighted (T2w) images. To explore the key components in the MR images that drove task performance, we segment both T1w and T2w images into three different components-cerebrospinal fluid, grey matter and white matter, and evaluate performance of each segmented image.Main results:Results demonstrate that our multimodal framework capitalizes on the information across both modalities (T1w and T2w) for the joint task of tinnitus classification and severity prediction.Significance:Our model outperforms existing learning-based and conventional methods in terms of accuracy, sensitivity, specificity, and negative predictive value.
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Affiliation(s)
- Chieh-Te Lin
- Department of Radiology and Biomedical Imaging, University of California San Francisco, 513 Parnassus Ave, San Francisco, CA 94143, United States of America
| | - Sanjay Ghosh
- Department of Radiology and Biomedical Imaging, University of California San Francisco, 513 Parnassus Ave, San Francisco, CA 94143, United States of America
| | - Leighton B Hinkley
- Department of Radiology and Biomedical Imaging, University of California San Francisco, 513 Parnassus Ave, San Francisco, CA 94143, United States of America
| | - Corby L Dale
- Department of Radiology and Biomedical Imaging, University of California San Francisco, 513 Parnassus Ave, San Francisco, CA 94143, United States of America
| | - Ana C S Souza
- Department of Telecommunication and Mechatronics Engineering, Federal University of Sao Joao del-Rei, Praca Frei Orlando, 170, Sao Joao del Rei 36307, MG, Brazil
| | - Jennifer H Sabes
- Department of Otolaryngology-Head and Neck Surgery, University of California San Francisco, 2380 Sutter St., San Francisco, CA 94115, United States of America
| | - Christopher P Hess
- Department of Radiology and Biomedical Imaging, University of California San Francisco, 513 Parnassus Ave, San Francisco, CA 94143, United States of America
| | - Meredith E Adams
- Department of Otolaryngology-Head and Neck Surgery, University of Minnesota, Phillips Wangensteen Building, 516 Delaware St., Minneapolis, MN 55455, United States of America
| | - Steven W Cheung
- Department of Otolaryngology-Head and Neck Surgery, University of California San Francisco, 2380 Sutter St., San Francisco, CA 94115, United States of America.,Surgical Services, Veterans Affairs, 4150 Clement St., San Francisco, CA 94121, United States of America
| | - Srikantan S Nagarajan
- Department of Radiology and Biomedical Imaging, University of California San Francisco, 513 Parnassus Ave, San Francisco, CA 94143, United States of America.,Department of Otolaryngology-Head and Neck Surgery, University of California San Francisco, 2380 Sutter St., San Francisco, CA 94115, United States of America.,Surgical Services, Veterans Affairs, 4150 Clement St., San Francisco, CA 94121, United States of America
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11
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Houghton C, Hennessy M, Smyth S, Hennelly N, Smalle M, Jordan F, Jones CH, Quinn M, Casey D, Teahan Á. The experiences and perceptions of young people and older people living with dementia of participating in intergenerational programmes: A qualitative evidence synthesis. DEMENTIA 2022; 21:2144-2171. [PMID: 35815361 PMCID: PMC9483709 DOI: 10.1177/14713012221112385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Intergenerational programmes are formal activities bringing different generations together and have been identified as a way to help people living with dementia to stay socially connected. While there is some evidence from individual studies as to their benefits, there is no overall coherent account as to the perceptions and experiences of participants who engage in such programmes. This review synthesises qualitative evidence of the experiences and perceptions of young people and older people living with dementia of participating in such programmes. Methods We searched EBSCO CINAHL, OVID Medline, Embase, Ovid PsycINFO, the Web of Science, Epistemonikos and grey literature sources. We used thematic synthesis to analyse and synthesise the evidence in to four themes, with 11 key findings. We assessed our confidence in each of these findings using the GRADE-CERQual (Confidence in the Evidence from Reviews of Qualitative research) approach. Findings Our review highlights the potential enjoyment for young people and older people living with dementia when participating in Intergenerational programmes, despite some initial trepidation. These programmes provide an opportunity to establish and develop relationships and for young people to learn about dementia, ageing and how to interact with older people living with dementia. However, it is important to have staff facilitators present to provide reassurance to both groups. It is also important to take the personal preferences of participants into account and to be considerate of noise levels and other aspects of programme delivery that may inhibit engagement. Conclusion This is the first qualitative evidence synthesis specifically exploring Intergenerational programmes aimed at older people living with dementia. We provide insights into the perspectives of those who have participated in Intergenerational programmes. It is important to consider these views, together with other evidence of effectiveness, when planning Intergenerational programmes. While our review is limited by a small number of studies from only a few countries, we have moderate to high confidence in our findings. Further research into the development of Intergenerational programmes specifically tailored for people living with dementia is needed. The findings also provide guidance for people planning to deliver or design future Intergenerational programmes.
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Affiliation(s)
| | | | - Siobhán Smyth
- School of Nursing and Midwifery, University of Galway, Ireland
| | - Niamh Hennelly
- The Irish Longitudinal Study on Ageing (TILDA), Trinity College Dublin; Centre for Economic and Social Research on Dementia (CESRD) University of Galway, Ireland
| | | | | | - Catrin H. Jones
- School of Medical and Health Sciences, Bangor University, Wales
| | - Michelle Quinn
- Health Services Executive West, Ballyshannon, Donegal, Ireland
| | - Dympna Casey
- School of Nursing and Midwifery, University of Galway, Ireland
| | - Áine Teahan
- Centre for Economic and Social Research on Dementia (CESRD), University of Galway, Ireland
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12
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Dixon E, Anderson J, Lazar A. Understanding How Sensory Changes Experienced by Individuals with a Range of Age-Related Cognitive Changes Can Effect Technology Use. ACM TRANSACTIONS ON ACCESSIBLE COMPUTING 2022; 15:10.1145/3511906. [PMID: 35919105 PMCID: PMC9340800 DOI: 10.1145/3511906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 01/01/2022] [Indexed: 10/18/2022]
Abstract
Clinical researchers have identified sensory changes people with age-related cognitive changes, such as dementia and mild cognitive impairment, experience that are different from typical age-related sensory changes. Technology designers and researchers do not yet have an understanding of how these unique sensory changes affect technology use. This work begins to bridge the gap between the clinical knowledge of sensory changes and technology research and design through interviews with people with mild to moderate dementia, mild cognitive impairment, subjective cognitive decline, and healthcare professionals. This extended version of our ASSETS conference paper includes people with a range of age-related cognitive changes describing changes in vision, hearing, speech, dexterity, proprioception, and smell. We discuss each of these sensory changes and ways to leverage optimal modes of sensory interaction for accessible technology use with existing and emerging technologies. Finally, we discuss how accessible sensory stimulation may change across the spectrum of age-related cognitive changes.
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Affiliation(s)
- Emma Dixon
- University of Maryland, College Park, Maryland, USA
| | | | - Amanda Lazar
- University of Maryland, College Park, Maryland, USA
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13
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Zhou GP, Chen YC, Li WW, Wei HL, Yu YS, Zhou QQ, Yin X, Tao YJ, Zhang H. Aberrant functional and effective connectivity of the frontostriatal network in unilateral acute tinnitus patients with hearing loss. Brain Imaging Behav 2021; 16:151-160. [PMID: 34296381 DOI: 10.1007/s11682-021-00486-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/23/2021] [Indexed: 12/25/2022]
Abstract
PURPOSE The present study combined resting-state functional connectivity (FC) and Granger causality analysis (GCA) to explore frontostriatal network dysfunction in unilateral acute tinnitus (AT) patients with hearing loss. METHODS The participants included 42 AT patients and 43 healthy control (HC) subjects who underwent resting-state functional magnetic resonance imaging (fMRI) scans. Based on the seed regions in the frontostriatal network, FC and GCA were conducted between the AT patients and HC subjects. Correlation analyses were used to examine correlations among altered FC values, GCA values, and clinical features in AT patients. RESULTS Compared with HCs, AT patients showed a general reduction in FC between the seed regions in the frontostriatal network and nonauditory areas, including the frontal cortices, midcingulate cortex (MCC), supramarginal gyrus, and postcentral gyrus (PoCG). Using the GCA algorithm, we detected abnormal effective connectivity (EC) in the inferior occipital gyrus, MCC, Cerebelum_Crus1, and PoCG. Furthermore, correlations between disrupted FC/EC and clinical characteristics, especially tinnitus distress-related characteristics, were found in AT patients. CONCLUSIONS Our work demonstrated abnormal FC and EC between the frontostriatal network and several nonauditory regions in AT patients with hearing loss, suggesting that multiple large-scale network dysfunctions and interactions are involved in the perception of tinnitus. These findings not only enhance the current understanding of the frontostriatal network in tinnitus but also serve as a reminder of the importance of focusing on tinnitus at an early stage.
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Affiliation(s)
- Gang-Ping Zhou
- Department of Radiology, The Affiliated Jiangning Hospital of Nanjing Medical University, No. 168, Gushan Road, Nanjing, 211100, Jiangsu Province, China
| | - Yu-Chen Chen
- Department of Radiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, Jiangsu Province, China
| | - Wang-Wei Li
- Department of E.N.T., The Affiliated Jiangning Hospital of Nanjing Medical University, No. 168, Gushan Road, Nanjing, 211100, Jiangsu Province, China
| | - Heng-Le Wei
- Department of Radiology, The Affiliated Jiangning Hospital of Nanjing Medical University, No. 168, Gushan Road, Nanjing, 211100, Jiangsu Province, China
| | - Yu-Sheng Yu
- Department of Radiology, The Affiliated Jiangning Hospital of Nanjing Medical University, No. 168, Gushan Road, Nanjing, 211100, Jiangsu Province, China
| | - Qing-Qing Zhou
- Department of Radiology, The Affiliated Jiangning Hospital of Nanjing Medical University, No. 168, Gushan Road, Nanjing, 211100, Jiangsu Province, China
| | - Xindao Yin
- Department of Radiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, Jiangsu Province, China
| | - Yue-Jin Tao
- Department of E.N.T., The Affiliated Jiangning Hospital of Nanjing Medical University, No. 168, Gushan Road, Nanjing, 211100, Jiangsu Province, China.
| | - Hong Zhang
- Department of Radiology, The Affiliated Jiangning Hospital of Nanjing Medical University, No. 168, Gushan Road, Nanjing, 211100, Jiangsu Province, China.
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Trakolis L, Bender B, Ebner FH, Ernemann U, Tatagiba M, Naros G. Cortical and subcortical gray matter changes in patients with chronic tinnitus sustaining after vestibular schwannoma surgery. Sci Rep 2021; 11:8411. [PMID: 33863965 PMCID: PMC8052351 DOI: 10.1038/s41598-021-87915-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 04/06/2021] [Indexed: 02/07/2023] Open
Abstract
Tinnitus is attributed to partial sensory deafferentation resulting in a central maladaptive neuroplasticity. Unfortunately, the agent of deafferentation is usually unknown or irreversible. In patients with unilateral vestibular schwannoma (VS), however, the auditory nerve is affected by a benign tumor. Hence, removal of the tumor can cease the tinnitus. In turn, sustaining complaints after surgery indicate cortical neuroplasticity. The present study is a cross sectional study which aims to track cortical structural changes by surface-based morphometry in 46 VS patients with sustained (i.e. centralized) or ceased (i.e. peripheral) tinnitus after surgery. A volumetric analysis of cortical and subcortical gray matter (GM) anatomy was performed on preoperative high-resolution MRI and related to the presence of hearing impairment, pre- and/or postoperative tinnitus. Patients with sustained (i.e. chronic) tinnitus showed an increased GM volume of the bilateral caudate nucleus, the contralateral superior colliculus, the middle frontal and middle temporal gyrus, the fusiform gyrus as well as the ipsilateral pars orbitalis when compared to those patients in whom tinnitus ceased postoperatively. Chronic tinnitus in VS patients is associated with characteristic structural changes in frontal, temporal and subcortical areas. Notably, a significant GM change of the caudate nucleus was detected providing further support for the striatal gaiting model of tinnitus.
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Affiliation(s)
- Leonidas Trakolis
- grid.411544.10000 0001 0196 8249Department of Neurosurgery and Neurotechnology, Eberhard Karls University Hospital, Hoppe-Seyler-Straße 3, 72076 Tuebingen, Germany
| | - Benjamin Bender
- grid.411544.10000 0001 0196 8249Department of Diagnostic and Interventional Neuroradiology, Eberhardt Karls University Hospital, Tuebingen, Germany
| | - Florian H. Ebner
- grid.476313.4Department of Neurosurgery, Alfried Krupp Hospital, Essen, Germany
| | - Ulrike Ernemann
- grid.411544.10000 0001 0196 8249Department of Diagnostic and Interventional Neuroradiology, Eberhardt Karls University Hospital, Tuebingen, Germany
| | - Marcos Tatagiba
- grid.411544.10000 0001 0196 8249Department of Neurosurgery and Neurotechnology, Eberhard Karls University Hospital, Hoppe-Seyler-Straße 3, 72076 Tuebingen, Germany
| | - Georgios Naros
- grid.411544.10000 0001 0196 8249Department of Neurosurgery and Neurotechnology, Eberhard Karls University Hospital, Hoppe-Seyler-Straße 3, 72076 Tuebingen, Germany
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15
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Yousef A, Hinkley LB, Nagarajan SS, Cheung SW. Neuroanatomic Volume Differences in Tinnitus and Hearing Loss. Laryngoscope 2021; 131:1863-1868. [PMID: 33811641 DOI: 10.1002/lary.29549] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 03/12/2021] [Accepted: 03/22/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVES To investigate neuroanatomic volume differences in tinnitus and hearing loss. STUDY DESIGN Cross-sectional. METHODS Sixteen regions of interest (ROIs) in adults (43 male, 29 female) were examined using 3Tesla structural magnetic resonance imaging in four cohorts: 1) tinnitus with moderate hearing loss (N = 31), 2) moderate hearing loss only (N = 15), 3) tinnitus with normal hearing (N = 17), and 4) normal hearing only (N = 13). ROI volumes were corrected for brain size, age, and sex variations. Analysis of covariance (ANCOVA) and post hoc Tukey's test were used to isolate the effects of tinnitus and hearing loss on volume differences. Effect sizes were calculated as the fraction of total variance (η2 ) in ANCOVA models and percent of mean volume difference relative to mean total volume. RESULTS The four cohort ANCOVA revealed tinnitus and hearing loss cohorts to have increased volume in the corona radiata (η2 = 0.192; P = .0018) and decreased volume in the nucleus accumbens (η2 = 0.252; P < .0001), caudate nucleus (η2 = 0.188; P = .002), and inferior fronto-occipital fasciculus (η2 = 0.250; P = .0001). Tinnitus with normal hearing showed decreased volume in the nucleus accumbens (22.0%; P = .001) and inferior fronto-occipital fasciculus (18.1%; P = .002), and hearing loss only showed increased volume in the corona radiata (10.7%; P = .01) and decreased volume in the nucleus accumbens (22.1%; P = .001), caudate nucleus (16.1%; P = .004), and inferior fronto-occipital fasciculus (18.3%; P = .003). CONCLUSION Tinnitus and hearing loss have overlapping effects on neurovolumetric alterations, especially impacting the nucleus accumbens and inferior fronto-occipital fasciculus. Neurovolumetric studies on tinnitus or hearing loss can be more complete by accounting for those two clinical dimensions separately and jointly. LEVEL OF EVIDENCE 3 Laryngoscope, 131:1863-1868, 2021.
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Affiliation(s)
- Andrew Yousef
- Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, California, U.S.A
| | - Leighton B Hinkley
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, California, U.S.A
| | - Srikantan S Nagarajan
- Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, California, U.S.A.,Department of Radiology and Biomedical Imaging, University of California, San Francisco, California, U.S.A
| | - Steven W Cheung
- Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, California, U.S.A
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16
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Johnson JCS, Marshall CR, Weil RS, Bamiou DE, Hardy CJD, Warren JD. Hearing and dementia: from ears to brain. Brain 2021; 144:391-401. [PMID: 33351095 PMCID: PMC7940169 DOI: 10.1093/brain/awaa429] [Citation(s) in RCA: 85] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/02/2020] [Accepted: 10/17/2020] [Indexed: 12/19/2022] Open
Abstract
The association between hearing impairment and dementia has emerged as a major public health challenge, with significant opportunities for earlier diagnosis, treatment and prevention. However, the nature of this association has not been defined. We hear with our brains, particularly within the complex soundscapes of everyday life: neurodegenerative pathologies target the auditory brain, and are therefore predicted to damage hearing function early and profoundly. Here we present evidence for this proposition, based on structural and functional features of auditory brain organization that confer vulnerability to neurodegeneration, the extensive, reciprocal interplay between 'peripheral' and 'central' hearing dysfunction, and recently characterized auditory signatures of canonical neurodegenerative dementias (Alzheimer's disease, Lewy body disease and frontotemporal dementia). Moving beyond any simple dichotomy of ear and brain, we argue for a reappraisal of the role of auditory cognitive dysfunction and the critical coupling of brain to peripheral organs of hearing in the dementias. We call for a clinical assessment of real-world hearing in these diseases that moves beyond pure tone perception to the development of novel auditory 'cognitive stress tests' and proximity markers for the early diagnosis of dementia and management strategies that harness retained auditory plasticity.
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Affiliation(s)
- Jeremy C S Johnson
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK
| | - Charles R Marshall
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK
- Preventive Neurology Unit, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK
| | - Rimona S Weil
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK
- Movement Disorders Centre, Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London, UK
- Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, University College London, London, UK
| | - Doris-Eva Bamiou
- UCL Ear Institute and UCL/UCLH Biomedical Research Centre, National Institute for Health Research, University College London, London, UK
| | - Chris J D Hardy
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK
| | - Jason D Warren
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK
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Ruksenaite J, Volkmer A, Jiang J, Johnson JC, Marshall CR, Warren JD, Hardy CJ. Primary Progressive Aphasia: Toward a Pathophysiological Synthesis. Curr Neurol Neurosci Rep 2021; 21:7. [PMID: 33543347 PMCID: PMC7861583 DOI: 10.1007/s11910-021-01097-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/13/2021] [Indexed: 12/14/2022]
Abstract
PURPOSE OF REVIEW The term primary progressive aphasia (PPA) refers to a diverse group of dementias that present with prominent and early problems with speech and language. They present considerable challenges to clinicians and researchers. RECENT FINDINGS Here, we review critical issues around diagnosis of the three major PPA variants (semantic variant PPA, nonfluent/agrammatic variant PPA, logopenic variant PPA), as well as considering 'fragmentary' syndromes. We next consider issues around assessing disease stage, before discussing physiological phenotyping of proteinopathies across the PPA spectrum. We also review evidence for core central auditory impairments in PPA, outline critical challenges associated with treatment, discuss pathophysiological features of each major PPA variant, and conclude with thoughts on key challenges that remain to be addressed. New findings elucidating the pathophysiology of PPA represent a major step forward in our understanding of these diseases, with implications for diagnosis, care, management, and therapies.
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Affiliation(s)
- Justina Ruksenaite
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, 8 - 11 Queen Square, London, WC1N 3BG, UK
| | - Anna Volkmer
- Division of Psychology and Language Sciences, University College London, London, UK
| | - Jessica Jiang
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, 8 - 11 Queen Square, London, WC1N 3BG, UK
| | - Jeremy Cs Johnson
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, 8 - 11 Queen Square, London, WC1N 3BG, UK
| | - Charles R Marshall
- Preventive Neurology Unit, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK
| | - Jason D Warren
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, 8 - 11 Queen Square, London, WC1N 3BG, UK
| | - Chris Jd Hardy
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, 8 - 11 Queen Square, London, WC1N 3BG, UK.
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Höbler F, McGilton KS, Wittich W, Dupuis K, Reed M, Dumassais S, Mick P, Pichora-Fuller MK. Hearing Screening for Residents in Long-Term Care Homes Who Live with Dementia: A Scoping Review. J Alzheimers Dis 2021; 84:1115-1138. [PMID: 34633326 PMCID: PMC8673512 DOI: 10.3233/jad-215087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/07/2021] [Indexed: 11/15/2022]
Abstract
BACKGROUND Hearing loss is highly prevalent in older adults, particularly among those living with dementia and residing in long-term care homes (LTCHs). Sensory declines can have deleterious effects on functioning and contribute to frailty, but the hearing needs of residents are often unrecognized or unaddressed. OBJECTIVE To identify valid and reliable screening measures that are effective for the identification of hearing loss and are suitable for use by nursing staff providing care to residents with dementia in LTCHs. METHODS Electronic databases (Embase, Medline, PsycINFO, CENTRAL, and CINAHL) were searched using comprehensive search strategies, and a stepwise approach based on Arksey & O'Malley's scoping review and appraisal process was followed. RESULTS There were 193 scientific papers included in the review. Pure-tone audiometry was the most frequently reported measure to test hearing in older adults living with dementia. However, measures including self- or other-reports and questionnaires, review of medical records, otoscopy, and the whisper test were found to be most suitable for use by nurses working with older adults living with dementia in LTCHs. CONCLUSION Although frequently used, the suitability of pure-tone audiometry for use by nursing staff in LTCHs is limited, as standardized audiometry presents challenges for many residents, and specific training is needed to successfully adapt test administration procedures and interpret results. The whisper test was considered to be more suitable for use by staff in LTCH; however, it yields a limited characterization of hearing loss. There remains an urgent need to develop new approaches to screen hearing in LTCHs.
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Affiliation(s)
- Fiona Höbler
- KITE – Toronto Rehabilitation Institute, University Health Network, Toronto, ON, Canada
- Rehabilitation Sciences Institute, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Katherine S. McGilton
- KITE – Toronto Rehabilitation Institute, University Health Network, Toronto, ON, Canada
- Rehabilitation Sciences Institute, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Lawrence S. Bloomberg Faculty of Nursing, University of Toronto, Toronto, ON, Canada
| | - Walter Wittich
- École d’optométrie, Université de Montréal, Montréal, QC, Canada
- Institut Nazareth et Louis-Braille du CISSS de la Montérégie-Centre, Longueuil, QC, Canada
- Centre de réadaptation Lethbridge-Layton-Mackay du CIUSSS du Centre-Ouest-de-l’Île-de-Montréal, Montréal, QC, Canada
| | - Kate Dupuis
- Sheridan Centre for Elder Research, Sheridan College, Oakville, ON, Canada
| | - Marilyn Reed
- Audiology, Baycrest Health Sciences, Toronto, ON, Canada
| | - Shirley Dumassais
- École d’optométrie, Université de Montréal, Montréal, QC, Canada
- Institut Nazareth et Louis-Braille du CISSS de la Montérégie-Centre, Longueuil, QC, Canada
| | - Paul Mick
- Department of Surgery, Faculty of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
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Koops EA, de Kleine E, van Dijk P. Gray matter declines with age and hearing loss, but is partially maintained in tinnitus. Sci Rep 2020; 10:21801. [PMID: 33311548 PMCID: PMC7732822 DOI: 10.1038/s41598-020-78571-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 11/26/2020] [Indexed: 12/23/2022] Open
Abstract
The impact of age-related hearing loss extends beyond the auditory pathway and impacts brain areas related to cognitive impairment and even dementia. The presence of tinnitus, a sensation of sound that frequently co-occurs with hearing loss, is additionally linked to cognitive decline. Interestingly, structural neuroimaging studies have reported that hearing loss may precede or modulate the onset of cognitive impairment. In this study, we aimed to disentangle the effects of age, hearing loss, and tinnitus on gray matter structure. In total, 39 participants with hearing loss and tinnitus, 21 with hearing loss but without tinnitus, and 39 controls were included in this voxel- and surface-based morphometry MRI study. Whole brain volume and surface thickness measures were compared between the groups. Age-related gray matter volume decline was observed in all groups. Several brain areas showed smaller gray matter volume and cortical surface thickness in hearing loss without tinnitus, relative to controls. This reduction was observed both within and outside of the auditory pathway. Interestingly, these reductions were not observed in participants with tinnitus, who had similar hearing loss and were of similar age. Since we have tools to improve hearing loss, hearing screening may aid in the battle against cognitive decline.
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Affiliation(s)
- Elouise A Koops
- Department of Otorhinolaryngology/Head and Neck Surgery, University Medical Center Groningen, University of Groningen, P.O. Box 30.001, 9700 RB, Groningen, The Netherlands. .,Graduate School of Medical Sciences (Research School of Behavioural and Cognitive Neurosciences), University of Groningen, Groningen, The Netherlands. .,Cognitive Neuroscience Center Groningen, University of Groningen, Groningen, The Netherlands.
| | - Emile de Kleine
- Department of Otorhinolaryngology/Head and Neck Surgery, University Medical Center Groningen, University of Groningen, P.O. Box 30.001, 9700 RB, Groningen, The Netherlands.,Graduate School of Medical Sciences (Research School of Behavioural and Cognitive Neurosciences), University of Groningen, Groningen, The Netherlands
| | - Pim van Dijk
- Department of Otorhinolaryngology/Head and Neck Surgery, University Medical Center Groningen, University of Groningen, P.O. Box 30.001, 9700 RB, Groningen, The Netherlands.,Graduate School of Medical Sciences (Research School of Behavioural and Cognitive Neurosciences), University of Groningen, Groningen, The Netherlands
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20
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Liu Y, Alkharabsheh A, Sun W. Hyperexcitability of the Nucleus Accumbens Is Involved in Noise-Induced Hyperacusis. Neural Plast 2020; 2020:8814858. [PMID: 33293947 PMCID: PMC7714561 DOI: 10.1155/2020/8814858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 10/18/2020] [Accepted: 11/12/2020] [Indexed: 11/18/2022] Open
Abstract
Reduced tolerance to sound stimuli (hyperacusis) is commonly seen in tinnitus patients. Dysfunction of limbic systems, such as the nucleus accumbens (NAc), may be involved in emotional reactions to the sound stimuli in tinnitus patients. To study the functional changes in the NAc in hyperacusis, we have examined the neural activity changes of the NAc using c-Fos staining in an animal model of hyperacusis. The c-Fos staining was also examined in the medial geniculate nucleus (MGN), a central auditory pathway which has neural projections to the NAc. Postnatal rats (14 days) were exposed to loud noise (115 dB SPL, 4 hours for two consecutive days) to induce hyperacusis (n = 4). Rats without noise exposure were used as the controls (n = 4). After P35, rats in both groups were put in a behavioral training for sound detection. After they were trained to detect sound stimuli, their reaction time to noise bursts centered at 2 kHz (40-110 dB SPL) was measured. Rats in the noise group showed a significantly shorter reaction time than those in the control group to the noise bursts at high intensities, suggesting the noise exposure induced hyperacusis behavior. The c-Fos expressions in the NAc and the MGNs of the noise group were significantly higher than those of the control group. Our results suggested that early-age noise exposure caused hyperactivity in the NAc and the MGNs which may induce the loudness increase in these rats.
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Affiliation(s)
- Yuying Liu
- Department of Otorhinolaryngology-Head and Neck Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, No. 100 Haining Road, Shanghai, China 200080
| | - Ana''am Alkharabsheh
- Department of Hearing and Speech Sciences, University of Jordan, Queen Rania Al Abdallah St., Amman, Jordan 11942
| | - Wei Sun
- Department of Communicative Disorders and Sciences, Center for Hearing and Deafness, State University of New York at Buffalo, 137 Cary Hall, 3435 Main Street, Buffalo, NY 14214, USA
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21
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Chu HT, Liang CS, Yeh TC, Hu LY, Yang AC, Tsai SJ, Shen CC. Tinnitus and risk of Alzheimer's and Parkinson's disease: a retrospective nationwide population-based cohort study. Sci Rep 2020; 10:12134. [PMID: 32699252 PMCID: PMC7376045 DOI: 10.1038/s41598-020-69243-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Accepted: 07/07/2020] [Indexed: 01/09/2023] Open
Abstract
Tinnitus has been implied as a “soft” sign of neurodegenerative disease, which is characterized by progressive loss of neuronal function, such as Alzheimer’s disease (AD) and Parkinson’s disease (PD). This study aimed to determine whether the risk of developing AD/PD increases after having tinnitus. We conducted a retrospective matched cohort study with 12,657 tinnitus patients and 25,314 controls from the National Health Insurance Research Database (NHIRD) in Taiwan with almost 10 years follow-up. Tinnitus-related risk on developing AD/PD followingly was determined by the Cox regression to identify potential confounding factors. Through the 10-year follow-up period, 398 individuals with tinnitus (3.1%) and 501 control individuals (2.0%) developed AD (P < 0.001), and 211 tinnitus patients (1.7%) and 249 control patients (1.0%) developed PD (P < 0.001). Compared with controls, patients with tinnitus were 1.54 times more likely to develop AD (95% confidence interval (CI) 1.34–1.78, P < 0.001) and 1.56 times more likely to develop PD (95% CI 1.29–1.89, P < 0.001), after adjusting confounding factors. Our results indicate an association between tinnitus and higher risk of developing AD and PD. Additional physical comorbidities may also increase the risk of developing AD and PD.
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Affiliation(s)
- Hsuan-Te Chu
- Department of Psychiatry, Beitou Branch, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.,Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan
| | - Chih-Sung Liang
- Department of Psychiatry, Beitou Branch, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.,Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Ta-Chuan Yeh
- Department of Psychiatry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Li-Yu Hu
- Department of Psychiatry, Taipei Veterans General Hospital, No 201, Sec 2. Shi-Pai Rd., Taipei, 11217, Taiwan.,School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Albert C Yang
- Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan.,School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Division of Interdisciplinary Medicine and Biotechnology, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA, USA
| | - Shih-Jen Tsai
- Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan. .,Department of Psychiatry, Taipei Veterans General Hospital, No 201, Sec 2. Shi-Pai Rd., Taipei, 11217, Taiwan. .,School of Medicine, National Yang-Ming University, Taipei, Taiwan.
| | - Cheng-Che Shen
- School of Medicine, National Yang-Ming University, Taipei, Taiwan. .,Department of Psychiatry, Chiayi Branch, Taichung Veterans General Hospital, Chiayi, Taiwan.
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22
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Besteher B, Gaser C, Ivanšić D, Guntinas-Lichius O, Dobel C, Nenadić I. Chronic tinnitus and the limbic system: Reappraising brain structural effects of distress and affective symptoms. NEUROIMAGE-CLINICAL 2019; 24:101976. [PMID: 31494400 PMCID: PMC6734051 DOI: 10.1016/j.nicl.2019.101976] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 07/14/2019] [Accepted: 08/06/2019] [Indexed: 12/18/2022]
Abstract
Chronic tinnitus has been associated with brain structural changes in both the auditory system as well as limbic system. While there is considerable inconsistency across brain structural findings, growing evidence suggests that distress and other non-auditory symptoms modulate effects. In this study we addressed this issue, testing the hypothesis that limbic changes in tinnitus relate to both disease-related distress as well as co-morbid psychopathology. We obtained high-resolution structural magnetic resonance imaging (MRI) scans from a total of 125 subjects: 59 patients with bilateral chronic tinnitus (29 with a co-morbid psychiatric condition, 30 without), 40 healthy controls and 26 psychiatric controls with depression/anxiety disorders (without tinnitus). Voxel-based morphometry with the CAT12 software package was used to analyse data. First, we analysed data based on a 2 × 2 factorial design (tinnitus; psychiatric co-morbidity), showing trend-level effects for tinnitus in ROI analyses of the anterior cingulate cortex and superior/transverse temporal gyri, and for voxel-based analysis in the left parahippocampal cortex. Multiple regression analyses showed that the parahippocampal finding was mostly predicted by tinnitus rather than (dimensional) psychopathology ratings. Comparing only low-distress tinnitus patients (independent of co-morbid conditions) with healthy controls also showed reduced left parahippocampal grey matter. Our findings demonstrate that depression and anxiety (not only subjective distress) are major modulators of brain structural effects in tinnitus, calling for a stronger consideration of psychopathology in future neurobiological and clinical studies of tinnitus. Chronic tinnitus is associated with high psychiatric co-morbidity and distress. Parahippocamal grey matter is associated with tinnitus rather than distress. Psychiatric co-morbidity modulates tinnitus-related structural patterns.
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Affiliation(s)
- Bianca Besteher
- Department of Psychiatry and Psychotherapy, Jena University Hospital, Jena, Germany.
| | - Christian Gaser
- Department of Psychiatry and Psychotherapy, Jena University Hospital, Jena, Germany; Department of Neurology, Jena University Hospital, Jena, Germany
| | - Daniela Ivanšić
- Department of Otorhinolaryngology, Jena University Hospital, Jena, Germany
| | | | - Christian Dobel
- Department of Otorhinolaryngology, Jena University Hospital, Jena, Germany
| | - Igor Nenadić
- Department of Psychiatry and Psychotherapy, Jena University Hospital, Jena, Germany; Department of Psychiatry and Psychotherapy, Philipps-University Marburg/Marburg University Hospital - UKGM, Marburg, Germany
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23
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Hardy CJD, Johnson JCS, Warren JD. Auditory symptoms in primary progressive aphasia: A commentary on Utianski et al. (2019). Cortex 2019; 119:580-582. [PMID: 31030898 DOI: 10.1016/j.cortex.2019.03.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 03/21/2019] [Indexed: 10/27/2022]
Affiliation(s)
- Chris J D Hardy
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, UK.
| | - Jeremy C S Johnson
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, UK
| | - Jason D Warren
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, UK
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24
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Attarha M, Bigelow J, Merzenich MM. Unintended Consequences of White Noise Therapy for Tinnitus—Otolaryngology's Cobra Effect. JAMA Otolaryngol Head Neck Surg 2018; 144:938-943. [DOI: 10.1001/jamaoto.2018.1856] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mouna Attarha
- Posit Science Corporation, San Francisco, California
| | - James Bigelow
- Coleman Memorial Laboratory, Department of Otolaryngology–Head and Neck Surgery, University of California, San Francisco
| | - Michael M. Merzenich
- Posit Science Corporation, San Francisco, California
- Coleman Memorial Laboratory, Department of Otolaryngology–Head and Neck Surgery, University of California, San Francisco
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25
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Changes in the regional shape and volume of subcortical nuclei in patients with tinnitus comorbid with mild hearing loss. Neuroradiology 2018; 60:1203-1211. [DOI: 10.1007/s00234-018-2093-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 08/29/2018] [Indexed: 12/26/2022]
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26
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Marshall CR, Hardy CJD, Volkmer A, Russell LL, Bond RL, Fletcher PD, Clark CN, Mummery CJ, Schott JM, Rossor MN, Fox NC, Crutch SJ, Rohrer JD, Warren JD. Primary progressive aphasia: a clinical approach. J Neurol 2018; 265:1474-1490. [PMID: 29392464 PMCID: PMC5990560 DOI: 10.1007/s00415-018-8762-6] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/18/2018] [Accepted: 01/19/2018] [Indexed: 12/12/2022]
Abstract
The primary progressive aphasias are a heterogeneous group of focal 'language-led' dementias that pose substantial challenges for diagnosis and management. Here we present a clinical approach to the progressive aphasias, based on our experience of these disorders and directed at non-specialists. We first outline a framework for assessing language, tailored to the common presentations of progressive aphasia. We then consider the defining features of the canonical progressive nonfluent, semantic and logopenic aphasic syndromes, including 'clinical pearls' that we have found diagnostically useful and neuroanatomical and other key associations of each syndrome. We review potential diagnostic pitfalls and problematic presentations not well captured by conventional classifications and propose a diagnostic 'roadmap'. After outlining principles of management, we conclude with a prospect for future progress in these diseases, emphasising generic information processing deficits and novel pathophysiological biomarkers.
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Affiliation(s)
- Charles R Marshall
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK.
| | - Chris J D Hardy
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Anna Volkmer
- Division of Psychology and Language Sciences, University College London, London, UK
| | - Lucy L Russell
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Rebecca L Bond
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Phillip D Fletcher
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Camilla N Clark
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Catherine J Mummery
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Jonathan M Schott
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Martin N Rossor
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Nick C Fox
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Sebastian J Crutch
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Jonathan D Rohrer
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Jason D Warren
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK.
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27
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Chen YC, Bo F, Xia W, Liu S, Wang P, Su W, Xu JJ, Xiong Z, Yin X. Amygdala functional disconnection with the prefrontal-cingulate-temporal circuit in chronic tinnitus patients with depressive mood. Prog Neuropsychopharmacol Biol Psychiatry 2017; 79:249-257. [PMID: 28689008 DOI: 10.1016/j.pnpbp.2017.07.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 07/02/2017] [Accepted: 07/02/2017] [Indexed: 10/19/2022]
Abstract
Chronic tinnitus is often accompanied with depressive symptom, which may arise from aberrant functional coupling between the amygdala and cerebral cortex. To explore this hypothesis, resting-state functional magnetic resonance imaging (fMRI) was used to investigate the disrupted amygdala-cortical functional connectivity (FC) in chronic tinnitus patients with depressive mood. Chronic tinnitus patients with depressive mood (n=20), without depressive mood (n=20), and well-matched healthy controls (n=23) underwent resting-state fMRI scanning. Amygdala-cortical FC was characterized using a seed-based whole-brain correlation method. The bilateral amygdala FC was compared among the three groups. Compared to non-depressed patients, depressive tinnitus patients showed decreased amygdala FC with the prefrontal cortex and anterior cingulate cortex as well as increased amygdala FC with the postcentral gyrus and lingual gyrus. Relative to healthy controls, depressive tinnitus patients revealed decreased amygdala FC with the superior and middle temporal gyrus, anterior and posterior cingulate cortex, and prefrontal cortex, as well as increased amygdala FC with the postcentral gyrus and lingual gyrus. The current study identified for the first time abnormal resting-state amygdala-cortical FC with the prefrontal-cingulate-temporal circuit in chronic tinnitus patients with depressive mood, which will provide novel insight into the underlying neuropathological mechanisms of tinnitus-induced depressive disorder.
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Affiliation(s)
- Yu-Chen Chen
- Department of Radiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China.
| | - Fan Bo
- Department of Radiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Wenqing Xia
- Department of Endocrinology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Shenghua Liu
- Department of Radiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Peng Wang
- Department of Radiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Wen Su
- Department of Radiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Jin-Jing Xu
- Department of Otolaryngology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Zhenyu Xiong
- Toshiba Stroke and Vascular Research Center, State University of New York at Buffalo, Buffalo, NY, USA
| | - Xindao Yin
- Department of Radiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China.
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28
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Yoshimura S, Sato W, Kochiyama T, Uono S, Sawada R, Kubota Y, Toichi M. Gray matter volumes of early sensory regions are associated with individual differences in sensory processing. Hum Brain Mapp 2017; 38:6206-6217. [PMID: 28940867 DOI: 10.1002/hbm.23822] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 09/08/2017] [Accepted: 09/11/2017] [Indexed: 11/10/2022] Open
Abstract
Sensory processing (i.e., the manner in which the nervous system receives, modulates, integrates, and organizes sensory stimuli) is critical when humans are deciding how to react to environmental demands. Although behavioral studies have shown that there are stable individual differences in sensory processing, the neural substrates that implement such differences remain unknown. To investigate this issue, structural magnetic resonance imaging scans were acquired from 51 healthy adults and individual differences in sensory processing were assessed using the Sensory Profile questionnaire (Brown et al.: Am J Occup Ther 55 (2001) 75-82). There were positive relationships between the Sensory Profile modality-specific subscales and gray matter volumes in the primary or secondary sensory areas for the visual, auditory, touch, and taste/smell modalities. Thus, the present results suggest that individual differences in sensory processing are implemented by the early sensory regions. Hum Brain Mapp 38:6206-6217, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Sayaka Yoshimura
- Department of Neurodevelopmental Psychiatry, Habilitation and Rehabilitation, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Wataru Sato
- Department of Neurodevelopmental Psychiatry, Habilitation and Rehabilitation, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Takanori Kochiyama
- Brain Activity Imaging Center, Advanced Telecommunications Research Institute International, Soraku-gun, Kyoto, Japan
| | - Shota Uono
- Department of Neurodevelopmental Psychiatry, Habilitation and Rehabilitation, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Reiko Sawada
- Department of Neurodevelopmental Psychiatry, Habilitation and Rehabilitation, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan.,The Organization for Promoting Neurodevelopmental Disorder Research, Sakyo-ku, Kyoto, Japan
| | - Yasutaka Kubota
- Health and Medical Services Center, Shiga University, Hikone, Shiga, Japan
| | - Motomi Toichi
- The Organization for Promoting Neurodevelopmental Disorder Research, Sakyo-ku, Kyoto, Japan.,Faculty of Human Health Science, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
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29
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A methodological assessment of studies that use voxel-based morphometry to study neural changes in tinnitus patients. Hear Res 2017; 355:23-32. [PMID: 28951023 DOI: 10.1016/j.heares.2017.09.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 08/29/2017] [Accepted: 09/08/2017] [Indexed: 12/24/2022]
Abstract
BACKGROUND The scientific understanding of tinnitus and its etiology has transitioned from thinking of tinnitus as solely a peripheral auditory problem to an increasing awareness that cortical networks may play a critical role in tinnitus percept or bother. With this change, studies that seek to use structural brain imaging techniques to better characterize tinnitus patients have become more common. These studies include using voxel-based morphometry (VBM) to determine if there are differences in regional gray matter volume in individuals who suffer from tinnitus and those who do not. However, studies using VBM in patients with tinnitus have produced inconsistent and sometimes contradictory results. OBJECTIVE This paper is a systematic review of all of the studies to date that have used VBM to study regional gray matter volume in people with tinnitus, and explores ways in which methodological differences in these studies may account for their heterogeneous results. We also aim to provide guidance on how to conduct future studies using VBM to produce more reproducible results to further our understanding of disease processes such as tinnitus. METHODS Studies about tinnitus and VBM were searched for using PubMed and Embase. These returned 15 and 25 results respectively. Of these, nine met the study criteria and were included for review. An additional 5 studies were identified in the literature as pertinent to the topic at hand and were added to the review, for a total of 13 studies. RESULTS There was significant heterogeneity among the studies in several areas, including inclusion and exclusion criteria, software programs, and statistical analysis. We were not able to find publicly shared data or code for any study. DISCUSSION The differences in study design, software analysis, and statistical methodology make direct comparisons between the different studies difficult. Especially problematic are the differences in the inclusion and exclusion criteria of the study, and the statistical design of the studies, both of which could radically alter findings. Thus, heterogeneity has complicated efforts to explore the etiology of tinnitus using structural MRI. CONCLUSION There is a pressing need to standardize the use of VBM when evaluating tinnitus patients. While some heterogeneity is expected given the rapid advances in the field, more can be done to ensure that there is internal validity between studies.
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30
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Ouyang J, Pace E, Lepczyk L, Kaufman M, Zhang J, Perrine SA, Zhang J. Blast-Induced Tinnitus and Elevated Central Auditory and Limbic Activity in Rats: A Manganese-Enhanced MRI and Behavioral Study. Sci Rep 2017; 7:4852. [PMID: 28687812 PMCID: PMC5501813 DOI: 10.1038/s41598-017-04941-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 04/27/2017] [Indexed: 02/06/2023] Open
Abstract
Blast-induced tinitus is the number one service-connected disability that currently affects military personnel and veterans. To elucidate its underlying mechanisms, we subjected 13 Sprague Dawley adult rats to unilateral 14 psi blast exposure to induce tinnitus and measured auditory and limbic brain activity using manganese-enhanced MRI (MEMRI). Tinnitus was evaluated with a gap detection acoustic startle reflex paradigm, while hearing status was assessed with prepulse inhibition (PPI) and auditory brainstem responses (ABRs). Both anxiety and cognitive functioning were assessed using elevated plus maze and Morris water maze, respectively. Five weeks after blast exposure, 8 of the 13 blasted rats exhibited chronic tinnitus. While acoustic PPI remained intact and ABR thresholds recovered, the ABR wave P1-N1 amplitude reduction persisted in all blast-exposed rats. No differences in spatial cognition were observed, but blasted rats as a whole exhibited increased anxiety. MEMRI data revealed a bilateral increase in activity along the auditory pathway and in certain limbic regions of rats with tinnitus compared to age-matched controls. Taken together, our data suggest that while blast-induced tinnitus may play a role in auditory and limbic hyperactivity, the non-auditory effects of blast and potential traumatic brain injury may also exert an effect.
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Affiliation(s)
- Jessica Ouyang
- Department of Otolaryngology and Head and Neck Surgery, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Edward Pace
- Department of Otolaryngology and Head and Neck Surgery, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Laura Lepczyk
- Department of Otolaryngology and Head and Neck Surgery, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Michael Kaufman
- Department of Otolaryngology and Head and Neck Surgery, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Jessica Zhang
- Department of Otolaryngology and Head and Neck Surgery, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Shane A Perrine
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Jinsheng Zhang
- Department of Otolaryngology and Head and Neck Surgery, Wayne State University School of Medicine, Detroit, MI, 48201, USA.
- Department of Communication Sciences & Disorders, Wayne State University College of Liberal Arts and Sciences, Detroit, MI, 48201, USA.
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31
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Hardy CJD, Marshall CR, Golden HL, Clark CN, Mummery CJ, Griffiths TD, Bamiou DE, Warren JD. Hearing and dementia. J Neurol 2016; 263:2339-2354. [PMID: 27372450 PMCID: PMC5065893 DOI: 10.1007/s00415-016-8208-y] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 06/13/2016] [Accepted: 06/14/2016] [Indexed: 02/04/2023]
Abstract
Hearing deficits associated with cognitive impairment have attracted much recent interest, motivated by emerging evidence that impaired hearing is a risk factor for cognitive decline. However, dementia and hearing impairment present immense challenges in their own right, and their intersection in the auditory brain remains poorly understood and difficult to assess. Here, we outline a clinically oriented, symptom-based approach to the assessment of hearing in dementias, informed by recent progress in the clinical auditory neuroscience of these diseases. We consider the significance and interpretation of hearing loss and symptoms that point to a disorder of auditory cognition in patients with dementia. We identify key auditory characteristics of some important dementias and conclude with a bedside approach to assessing and managing auditory dysfunction in dementia.
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Affiliation(s)
- Chris J D Hardy
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, University College London, Queen Square, London, WC1N 3BG, UK
| | - Charles R Marshall
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, University College London, Queen Square, London, WC1N 3BG, UK
| | - Hannah L Golden
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, University College London, Queen Square, London, WC1N 3BG, UK
| | - Camilla N Clark
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, University College London, Queen Square, London, WC1N 3BG, UK
| | - Catherine J Mummery
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, University College London, Queen Square, London, WC1N 3BG, UK
- Cognitive Disorders Clinic for the Deaf, National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
| | - Timothy D Griffiths
- Auditory Group, Institute of Neuroscience, The Medical School, University of Newcastle upon Tyne, Newcastle upon Tyne, UK
- Central Auditory Disorders Clinic, National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
| | - Doris-Eva Bamiou
- Department of Neuro-otology, National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
- UCL Ear Institute, University College London, London, UK
- Central Auditory Disorders Clinic, National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
| | - Jason D Warren
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, University College London, Queen Square, London, WC1N 3BG, UK.
- Central Auditory Disorders Clinic, National Hospital for Neurology and Neurosurgery, Queen Square, London, UK.
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32
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Allan TW, Besle J, Langers DRM, Davies J, Hall DA, Palmer AR, Adjamian P. Neuroanatomical Alterations in Tinnitus Assessed with Magnetic Resonance Imaging. Front Aging Neurosci 2016; 8:221. [PMID: 27708577 PMCID: PMC5030287 DOI: 10.3389/fnagi.2016.00221] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 09/06/2016] [Indexed: 01/08/2023] Open
Abstract
Previous studies of anatomical changes associated with tinnitus have provided inconsistent results, with some showing significant cortical and subcortical changes, while others have found effects due to hearing loss, but not tinnitus. In this study, we examined changes in brain anatomy associated with tinnitus using anatomical scans from 128 participants with tinnitus and hearing loss, tinnitus with clinically normal hearing, and non-tinnitus controls with clinically normal hearing. The groups were matched for hearing loss, age and gender. We employed voxel- and surface-based morphometry (SBM) to investigate gray and white matter volume and thickness within regions-of-interest (ROI) that were based on the results of previous studies. The largest overall effects were found for age, gender, and hearing loss. With regard to tinnitus, analysis of ROI revealed numerous small increases and decreases in gray matter and thickness between tinnitus and non-tinnitus controls, in both cortical and subcortical structures. For whole brain analysis, the main tinnitus-related significant clusters were found outside sensory auditory structures. These include a decrease in cortical thickness for the tinnitus group compared to controls in the left superior frontal gyrus (SFG), and a decrease in cortical volume with hearing loss in left Heschl’s gyrus (HG). For masked analysis, we found a decrease in gray matter volume in the right Heschle’s gyrus for the tinnitus group compared to the controls. We found no changes in the subcallosal region as reported in some previous studies. Overall, while some of the morphological differences observed in this study are similar to previously published findings, others are entirely different or even contradict previous results. We highlight other discrepancies among previous results and the increasing need for a more precise subtyping of the condition.
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Affiliation(s)
- Thomas W Allan
- Medical Research Council Institute of Hearing Research, The University of Nottingham Nottingham, UK
| | - Julien Besle
- Medical Research Council Institute of Hearing Research, The University of Nottingham Nottingham, UK
| | - Dave R M Langers
- Nottingham Hearing Biomedical Research Unit, National Institute for Health Research (NIHR)Nottingham, UK; Otology and Hearing Group, Division of Clinical Neuroscience, School of Medicine, The University of NottinghamNottingham, UK
| | - Jeff Davies
- Nottingham Hearing Biomedical Research Unit, National Institute for Health Research (NIHR)Nottingham, UK; Otology and Hearing Group, Division of Clinical Neuroscience, School of Medicine, The University of NottinghamNottingham, UK
| | - Deborah A Hall
- Nottingham Hearing Biomedical Research Unit, National Institute for Health Research (NIHR)Nottingham, UK; Otology and Hearing Group, Division of Clinical Neuroscience, School of Medicine, The University of NottinghamNottingham, UK
| | - Alan R Palmer
- Medical Research Council Institute of Hearing Research, The University of Nottingham Nottingham, UK
| | - Peyman Adjamian
- Medical Research Council Institute of Hearing Research, The University of Nottingham Nottingham, UK
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33
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The Importance of Aging in Gray Matter Changes Within Tinnitus Patients Shown in Cortical Thickness, Surface Area and Volume. Brain Topogr 2016; 29:885-896. [DOI: 10.1007/s10548-016-0511-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 08/02/2016] [Indexed: 12/21/2022]
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Woollacott IOC, Rohrer JD. The clinical spectrum of sporadic and familial forms of frontotemporal dementia. J Neurochem 2016; 138 Suppl 1:6-31. [PMID: 27144467 DOI: 10.1111/jnc.13654] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 04/10/2016] [Accepted: 04/27/2016] [Indexed: 12/11/2022]
Abstract
The term frontotemporal dementia (FTD) describes a clinically, genetically and pathologically diverse group of neurodegenerative disorders. Symptoms of FTD can present in individuals in their 20s through to their 90s, but the mean age at onset is in the sixth decade. The most common presentation is with a change in personality and impaired social conduct (behavioural variant FTD). Less frequently patients present with language problems (primary progressive aphasia). Both of these groups of patients can develop motor features consistent with either motor neuron disease (usually the amyotrophic lateral sclerosis variant) or parkinsonism (most commonly a progressive supranuclear palsy or corticobasal syndrome). In about a third of cases FTD is familial, with mutations in the progranulin, microtubule-associated protein tau and chromosome 9 open reading frame 72 genes being the major causes. Mutations in a number of other genes including TANK-binding kinase 1 are rare causes of familial FTD. This review aims to clarify the often confusing terminology of FTD, and outline the various clinical features and diagnostic criteria of sporadic and familial FTD syndromes. It will also discuss the current major challenges in FTD research and clinical practice, and potential areas for future research. This review clarifies the terminology of frontotemporal dementia (FTD) and summarizes the various clinical features and most recent diagnostic criteria of sporadic and familial FTD syndromes. It also discusses the current major challenges in FTD research and clinical practice, and highlights potential areas for future research.
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Affiliation(s)
- Ione O C Woollacott
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Institute of Neurology, Queen Square, London, UK
| | - Jonathan D Rohrer
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Institute of Neurology, Queen Square, London, UK
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Tegg-Quinn S, Bennett RJ, Eikelboom RH, Baguley DM. The impact of tinnitus upon cognition in adults: A systematic review. Int J Audiol 2016; 55:533-40. [DOI: 10.1080/14992027.2016.1185168] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Susan Tegg-Quinn
- Ear Science Institute Australia, Subiaco, Perth, Australia,
- Ear Sciences Centre, School of Surgery, The University of Western Australia, Nedlands, Perth, Australia,
| | - Rebecca J. Bennett
- Ear Science Institute Australia, Subiaco, Perth, Australia,
- Ear Sciences Centre, School of Surgery, The University of Western Australia, Nedlands, Perth, Australia,
| | - Robert H. Eikelboom
- Ear Science Institute Australia, Subiaco, Perth, Australia,
- Ear Sciences Centre, School of Surgery, The University of Western Australia, Nedlands, Perth, Australia,
- Department of Speech-Language Pathology and Audiology, University of Pretoria, Pretoria, South Africa,
| | - David M. Baguley
- Department of Audiology and Otolaryngology, Addenbrooke’s Hospital, Cambridge, UK, and
- Department of Audiology, Anglia Ruskin University, Cambridge, UK
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36
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Elgoyhen AB, Langguth B, De Ridder D, Vanneste S. Tinnitus: perspectives from human neuroimaging. Nat Rev Neurosci 2015; 16:632-42. [DOI: 10.1038/nrn4003] [Citation(s) in RCA: 195] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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37
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Leaver AM, Seydell-Greenwald A, Rauschecker JP. Auditory-limbic interactions in chronic tinnitus: Challenges for neuroimaging research. Hear Res 2015; 334:49-57. [PMID: 26299843 DOI: 10.1016/j.heares.2015.08.005] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 07/07/2015] [Accepted: 08/17/2015] [Indexed: 01/09/2023]
Abstract
Tinnitus is a widespread auditory disorder affecting approximately 10-15% of the population, often with debilitating consequences. Although tinnitus commonly begins with damage to the auditory system due to loud-noise exposure, aging, or other etiologies, the exact neurophysiological basis of chronic tinnitus remains unknown. Many researchers point to a central auditory origin of tinnitus; however, a growing body of evidence also implicates other brain regions, including the limbic system. Correspondingly, we and others have proposed models of tinnitus in which the limbic and auditory systems both play critical roles and interact with one another. Specifically, we argue that damage to the auditory system generates an initial tinnitus signal, consistent with previous research. In our model, this "transient" tinnitus is suppressed when a limbic frontostriatal network, comprised of ventromedial prefrontal cortex and ventral striatum, successfully modulates thalamocortical transmission in the auditory system. Thus, in chronic tinnitus, limbic-system damage and resulting inefficiency of auditory-limbic interactions prevents proper compensation of the tinnitus signal. Neuroimaging studies utilizing connectivity methods like resting-state fMRI and diffusion MRI continue to uncover tinnitus-related anomalies throughout auditory, limbic, and other brain systems. However, directly assessing interactions between these brain regions and networks has proved to be more challenging. Here, we review existing empirical support for models of tinnitus stressing a critical role for involvement of "non-auditory" structures in tinnitus pathophysiology, and discuss the possible impact of newly refined connectivity techniques from neuroimaging on tinnitus research.
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Affiliation(s)
- Amber M Leaver
- Department of Neuroscience, Georgetown University Medical Center, Washington, DC, USA; Department of Neurology, University of California Los Angeles, Los Angeles, CA, USA
| | | | - Josef P Rauschecker
- Department of Neuroscience, Georgetown University Medical Center, Washington, DC, USA; Institute for Advanced Study, TUM, Munich, Germany.
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Fletcher PD, Downey LE, Golden HL, Clark CN, Slattery CF, Paterson RW, Schott JM, Rohrer JD, Rossor MN, Warren JD. Auditory hedonic phenotypes in dementia: A behavioural and neuroanatomical analysis. Cortex 2015; 67:95-105. [PMID: 25929717 PMCID: PMC4465962 DOI: 10.1016/j.cortex.2015.03.021] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 03/08/2015] [Accepted: 03/27/2015] [Indexed: 02/03/2023]
Abstract
Patients with dementia may exhibit abnormally altered liking for environmental sounds and music but such altered auditory hedonic responses have not been studied systematically. Here we addressed this issue in a cohort of 73 patients representing major canonical dementia syndromes (behavioural variant frontotemporal dementia (bvFTD), semantic dementia (SD), progressive nonfluent aphasia (PNFA) amnestic Alzheimer's disease (AD)) using a semi-structured caregiver behavioural questionnaire and voxel-based morphometry (VBM) of patients' brain MR images. Behavioural responses signalling abnormal aversion to environmental sounds, aversion to music or heightened pleasure in music (‘musicophilia’) occurred in around half of the cohort but showed clear syndromic and genetic segregation, occurring in most patients with bvFTD but infrequently in PNFA and more commonly in association with MAPT than C9orf72 mutations. Aversion to sounds was the exclusive auditory phenotype in AD whereas more complex phenotypes including musicophilia were common in bvFTD and SD. Auditory hedonic alterations correlated with grey matter loss in a common, distributed, right-lateralised network including antero-mesial temporal lobe, insula, anterior cingulate and nucleus accumbens. Our findings suggest that abnormalities of auditory hedonic processing are a significant issue in common dementias. Sounds may constitute a novel probe of brain mechanisms for emotional salience coding that are targeted by neurodegenerative disease.
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Affiliation(s)
- Phillip D Fletcher
- Dementia Research Centre, UCL Institute of Neurology, University College London, United Kingdom
| | - Laura E Downey
- Dementia Research Centre, UCL Institute of Neurology, University College London, United Kingdom
| | - Hannah L Golden
- Dementia Research Centre, UCL Institute of Neurology, University College London, United Kingdom
| | - Camilla N Clark
- Dementia Research Centre, UCL Institute of Neurology, University College London, United Kingdom
| | - Catherine F Slattery
- Dementia Research Centre, UCL Institute of Neurology, University College London, United Kingdom
| | - Ross W Paterson
- Dementia Research Centre, UCL Institute of Neurology, University College London, United Kingdom
| | - Jonathan M Schott
- Dementia Research Centre, UCL Institute of Neurology, University College London, United Kingdom
| | - Jonathan D Rohrer
- Dementia Research Centre, UCL Institute of Neurology, University College London, United Kingdom
| | - Martin N Rossor
- Dementia Research Centre, UCL Institute of Neurology, University College London, United Kingdom
| | - Jason D Warren
- Dementia Research Centre, UCL Institute of Neurology, University College London, United Kingdom.
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Fletcher PD, Nicholas JM, Shakespeare TJ, Downey LE, Golden HL, Agustus JL, Clark CN, Mummery CJ, Schott JM, Crutch SJ, Warren JD. Dementias show differential physiological responses to salient sounds. Front Behav Neurosci 2015; 9:73. [PMID: 25859194 PMCID: PMC4373266 DOI: 10.3389/fnbeh.2015.00073] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 03/08/2015] [Indexed: 11/24/2022] Open
Abstract
Abnormal responsiveness to salient sensory signals is often a prominent feature of dementia diseases, particularly the frontotemporal lobar degenerations, but has been little studied. Here we assessed processing of one important class of salient signals, looming sounds, in canonical dementia syndromes. We manipulated tones using intensity cues to create percepts of salient approaching ("looming") or less salient withdrawing sounds. Pupil dilatation responses and behavioral rating responses to these stimuli were compared in patients fulfilling consensus criteria for dementia syndromes (semantic dementia, n = 10; behavioral variant frontotemporal dementia, n = 16, progressive nonfluent aphasia, n = 12; amnestic Alzheimer's disease, n = 10) and a cohort of 26 healthy age-matched individuals. Approaching sounds were rated as more salient than withdrawing sounds by healthy older individuals but this behavioral response to salience did not differentiate healthy individuals from patients with dementia syndromes. Pupil responses to approaching sounds were greater than responses to withdrawing sounds in healthy older individuals and in patients with semantic dementia: this differential pupil response was reduced in patients with progressive nonfluent aphasia and Alzheimer's disease relative both to the healthy control and semantic dementia groups, and did not correlate with nonverbal auditory semantic function. Autonomic responses to auditory salience are differentially affected by dementias and may constitute a novel biomarker of these diseases.
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Affiliation(s)
- Phillip D. Fletcher
- Dementia Research Centre, UCL Institute of Neurology, University College LondonLondon, UK
| | - Jennifer M. Nicholas
- Dementia Research Centre, UCL Institute of Neurology, University College LondonLondon, UK
- London School of Hygiene and Tropical Medicine, University of LondonLondon, UK
| | - Timothy J. Shakespeare
- Dementia Research Centre, UCL Institute of Neurology, University College LondonLondon, UK
| | - Laura E. Downey
- Dementia Research Centre, UCL Institute of Neurology, University College LondonLondon, UK
| | - Hannah L. Golden
- Dementia Research Centre, UCL Institute of Neurology, University College LondonLondon, UK
| | - Jennifer L. Agustus
- Dementia Research Centre, UCL Institute of Neurology, University College LondonLondon, UK
| | - Camilla N. Clark
- Dementia Research Centre, UCL Institute of Neurology, University College LondonLondon, UK
| | - Catherine J. Mummery
- Dementia Research Centre, UCL Institute of Neurology, University College LondonLondon, UK
| | - Jonathan M. Schott
- Dementia Research Centre, UCL Institute of Neurology, University College LondonLondon, UK
| | - Sebastian J. Crutch
- Dementia Research Centre, UCL Institute of Neurology, University College LondonLondon, UK
| | - Jason D. Warren
- Dementia Research Centre, UCL Institute of Neurology, University College LondonLondon, UK
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40
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Vanneste S, Van De Heyning P, De Ridder D. Tinnitus: a large VBM-EEG correlational study. PLoS One 2015; 10:e0115122. [PMID: 25781934 PMCID: PMC4364116 DOI: 10.1371/journal.pone.0115122] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 11/18/2014] [Indexed: 11/29/2022] Open
Abstract
A surprising fact in voxel-based morphometry (VBM) studies performed in tinnitus is that not one single region is replicated in studies of different centers. The question then rises whether this is related to the low sample size of these studies, the selection of non-representative patient subgroups, or the absence of stratification according to clinical characteristics. Another possibility is that VBM is not a good tool to study functional pathologies such as tinnitus, in contrast to pathologies like Alzheimer's disease where it is known the pathology is related to cell loss. In a large sample of 154 tinnitus patients VBM and QEEG (Quantitative Electroencephalography) was performed and evaluated by a regression analysis. Correlation analyses are performed between VBM and QEEG data. Uncorrected data demonstrated structural differences in grey matter in hippocampal and cerebellar areas related to tinnitus related distress and tinnitus duration. After control for multiple comparisons, only cerebellar VBM changes remain significantly altered. Electrophysiological differences are related to distress, tinnitus intensity, and tinnitus duration in the subgenual anterior cingulate cortex, dorsal anterior cingulate cortex, hippocampus, and parahippocampus, which confirms previous results. The absence of QEEG-VBM correlations suggest functional changes are not reflected by co-occurring structural changes in tinnitus, and the absence of VBM changes (except for the cerebellum) that survive correct statistical analysis in a large study population suggests that VBM might not be very sensitive for studying tinnitus.
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Affiliation(s)
- Sven Vanneste
- Department of Translational Neuroscience, Faculty of Medicine, University of Antwerp, Antwerp, Belgium
- School for Behavioral & Brain Sciences, University of Texas at Dallas, Dallas, Texas, United States of America
| | - Paul Van De Heyning
- Department of Translational Neuroscience, Faculty of Medicine, University of Antwerp, Antwerp, Belgium
- ENT Department, University Hospital Antwerp, Antwerp, Belgium
| | - Dirk De Ridder
- Department of Surgical Sciences, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
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41
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Identification of environmental sounds and melodies in syndromes of anterior temporal lobe degeneration. J Neurol Sci 2015; 352:94-8. [PMID: 25843288 PMCID: PMC4425361 DOI: 10.1016/j.jns.2015.03.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 01/31/2015] [Accepted: 03/04/2015] [Indexed: 01/06/2023]
Abstract
Recognition of nonverbal sounds in semantic dementia and other syndromes of anterior temporal lobe degeneration may determine clinical symptoms and help to define phenotypic profiles. However, nonverbal auditory semantic function has not been widely studied in these syndromes. Here we investigated semantic processing in two key nonverbal auditory domains – environmental sounds and melodies – in patients with semantic dementia (SD group; n = 9) and in patients with anterior temporal lobe atrophy presenting with behavioural decline (TL group; n = 7, including four cases with MAPT mutations) in relation to healthy older controls (n = 20). We assessed auditory semantic performance in each domain using novel, uniform within-modality neuropsychological procedures that determined sound identification based on semantic classification of sound pairs. Both the SD and TL groups showed comparable overall impairments of environmental sound and melody identification; individual patients generally showed superior identification of environmental sounds than melodies, however relative sparing of melody over environmental sound identification also occurred in both groups. Our findings suggest that nonverbal auditory semantic impairment is a common feature of neurodegenerative syndromes with anterior temporal lobe atrophy. However, the profile of auditory domain involvement varies substantially between individuals. Nonverbal auditory processing is an understudied area of semantic memory. We assessed novel auditory semantic tasks in patients with temporal lobe atrophy. Environmental sound and music processing were comparably impaired across the cohort. Individual patients may show relative sparing of melody processing. Nonverbal auditory deficits integrally accompany temporal lobe degeneration.
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42
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Cianfrone G, Mazzei F, Salviati M, Turchetta R, Orlando MP, Testugini V, Carchiolo L, Cianfrone F, Altissimi G. Tinnitus Holistic Simplified Classification (THoSC): A New Assessment for Subjective Tinnitus, With Diagnostic and Therapeutic Implications. Ann Otol Rhinol Laryngol 2015; 124:550-60. [PMID: 25725038 DOI: 10.1177/0003489415570931] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE One of the most debated topics in tinnitus is its standard and practical classification. The most popular classification distinguishes subjective from objective tinnitus. Other classifications are based on different features. On the whole, they seem incomplete, and the diagnostic and therapeutic algorithms are often difficult for practical purposes. The aim of this work is to develop a new diagnostic and therapeutic algorithm. METHODS Our model is based on 10 years of experience. In particular, the starting point is the data retrieved from 212 consecutive patients in our Tinnitus Unit between May and December 2013: We found a clear auditory disorder in 74.5% of the population, muscolo-skeletal disorders and/or trigeminal disease in 57.1%, and psychiatric comorbidities in 43.8%. Different features coexisted in 59.9% of the population. RESULTS Following such data we propose the Tinnitus Holistic Simplified Classification, which takes into account the different tinnitogenic mechanisms and the interactions between them. It differentiates tinnitus that arises from: (1) auditory alterations (Auditory Tinnitus), (2) complex auditory-somatosensory interactions (Somatosensory Tinnitus), (3) psychopathological-auditory interactions (Psychopathology-related Tinnitus), and (4) 2 or all of the previous mechanisms (Combined Tinnitus). CONCLUSIONS In our opinion this classification provides an accurate and easy tailored path to manage tinnitus patients.
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Affiliation(s)
- Giancarlo Cianfrone
- Department of Otorhinolayngology, Audiology and Ophtalmology, Unit of Audiology, Sapienza University of Rome, Rome, Italy
| | - Filippo Mazzei
- Department of Otorhinolayngology, Audiology and Ophtalmology, Unit of Audiology, Sapienza University of Rome, Rome, Italy
| | - Massimo Salviati
- Department of Neurology and Psychiatry, Sapienza University of Rome, Rome, Italy
| | - Rosaria Turchetta
- Department of Otorhinolayngology, Audiology and Ophtalmology, Unit of Audiology, Sapienza University of Rome, Rome, Italy
| | - Maria Patrizia Orlando
- Department of Otorhinolayngology, Audiology and Ophtalmology, Unit of Audiology, Sapienza University of Rome, Rome, Italy
| | - Valeria Testugini
- A.I.R.S. Italian Association for the Research on Deafness, Rome, Italy
| | - Laura Carchiolo
- A.I.R.S. Italian Association for the Research on Deafness, Rome, Italy
| | | | - Giancarlo Altissimi
- Department of Otorhinolayngology, Audiology and Ophtalmology, Unit of Audiology, Sapienza University of Rome, Rome, Italy
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43
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Altered interhemispheric functional coordination in chronic tinnitus patients. BIOMED RESEARCH INTERNATIONAL 2015; 2015:345647. [PMID: 25789314 PMCID: PMC4350869 DOI: 10.1155/2015/345647] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 02/08/2015] [Indexed: 12/30/2022]
Abstract
Purpose. Recent studies suggest that tinnitus may be due in part to aberrant callosal structure and interhemispheric interaction. To explore this hypothesis we use a novel method, voxel-mirrored homotopic connectivity (VMHC), to examine the resting-state interhemispheric functional connectivity and its relationships with clinical characteristics in chronic tinnitus patients. Materials and Methods. Twenty-eight chronic tinnitus patients with normal hearing thresholds and 30 age-, sex-, education-, and hearing threshold-matched healthy controls were included in this study and underwent the resting-state fMRI scanning. We computed the VMHC to analyze the interhemispheric functional coordination between homotopic points of the brain in both groups. Results. Compared to the controls, tinnitus patients showed significantly increased VMHC in the middle temporal gyrus, middle frontal gyrus, and superior occipital gyrus. In tinnitus patients, a positive correlation was found between tinnitus duration and VMHC of the uncus. Moreover, correlations between VMHC changes and tinnitus distress were observed in the transverse temporal gyrus, superior temporal pole, precentral gyrus, and calcarine cortex. Conclusions. These results show altered interhemispheric functional connectivity linked with specific tinnitus characteristics in chronic tinnitus patients, which may be implicated in the neuropathophysiology of tinnitus.
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44
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Witoonpanich P, Crutch SJ, Warren JD, Rossor MN. The undiscovered syndrome: Macdonald Critchley's case of semantic dementia. Neurocase 2015; 21:408-12. [PMID: 24818802 PMCID: PMC4409044 DOI: 10.1080/13554794.2014.910307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Semantic dementia is a unique clinicopathological syndrome in the frontotemporal lobar degeneration spectrum. It is characterized by progressive and relatively selective impairment of semantic memory, associated with asymmetric antero-inferior temporal lobe atrophy. Although the syndrome became widely recognized only in the 1980s, descriptions of cases with typical features of semantic dementia have been on record for over a century. Here, we draw attention to a well documented historical case of a patient with features that would have fulfilled current consensus criteria for semantic dementia, as reconstructed from the notes made by her neurologist, Macdonald Critchley, in 1938. This case raises a number of issues concerning the nosology of the semantic dementia syndrome and the potential value of archived case material.
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Affiliation(s)
- Pirada Witoonpanich
- a Dementia Research Centre, UCL Institute of Neurology , University College London , London , UK
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45
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Abstract
Music is a complex acoustic signal that relies on a number of different brain and cognitive processes to create the sensation of hearing. Changes in hearing function are generally not a major focus of concern for persons with a majority of neurodegenerative diseases associated with dementia, such as Alzheimer disease (AD). However, changes in the processing of sounds may be an early, and possibly preclinical, feature of AD and other neurodegenerative diseases. The aim of this chapter is to review the current state of knowledge concerning hearing and music perception in persons who have a dementia as a result of a neurodegenerative disease. The review focuses on both peripheral and central auditory processing in common neurodegenerative diseases, with a particular focus on the processing of music and other non-verbal sounds. The chapter also reviews music interventions used for persons with neurodegenerative diseases.
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Affiliation(s)
- Julene K Johnson
- Institute for Health and Aging, University of California, San Francisco, CA, USA.
| | - Maggie L Chow
- School of Medicine, University of California, San Francisco, CA, USA
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46
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Tyler RS, Pienkowski M, Roncancio ER, Jun HJ, Brozoski T, Dauman N, Coelho CB, Andersson G, Keiner AJ, Cacace AT, Martin N, Moore BCJ. A review of hyperacusis and future directions: part I. Definitions and manifestations. Am J Audiol 2014; 23:402-19. [PMID: 25104073 DOI: 10.1044/2014_aja-14-0010] [Citation(s) in RCA: 186] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
PURPOSE Hyperacusis can be extremely debilitating, and at present, there is no cure. We provide an overview of the field, and possible related areas, in the hope of facilitating future research. METHOD We review and reference literature on hyperacusis and related areas. We have divided the review into 2 articles. In Part I, we discuss definitions, epidemiology, different etiologies and subgroups, and how hyperacusis affects people. In Part II, we review measurements, models, mechanisms, and treatments, and we finish with some suggestions for further research. RESULTS Hyperacusis encompasses a wide range of reactions to sound, which can be grouped into the categories of excessive loudness, annoyance, fear, and pain. Many different causes have been proposed, and it will be important to appreciate and quantify different subgroups. Reasonable approaches to assessing the different forms of hyperacusis are emerging, including psychoacoustical measures, questionnaires, and brain imaging. CONCLUSIONS Hyperacusis can make life difficult for many, forcing sufferers to dramatically alter their work and social habits. We believe this is an opportune time to explore approaches to better understand and treat hyperacusis.
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Affiliation(s)
| | | | | | | | - Tom Brozoski
- Southern Illinois University School of Medicine, Springfield
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47
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A brain centred view of psychiatric comorbidity in tinnitus: from otology to hodology. Neural Plast 2014; 2014:817852. [PMID: 25018882 PMCID: PMC4074975 DOI: 10.1155/2014/817852] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 03/18/2014] [Accepted: 05/05/2014] [Indexed: 11/17/2022] Open
Abstract
Introduction. Comorbid psychiatric disorders are frequent among patients affected by tinnitus. There are mutual clinical influences between tinnitus and psychiatric disorders, as well as neurobiological relations based on partially overlapping hodological and neuroplastic phenomena. The aim of the present paper is to review the evidence of alterations in brain networks underlying tinnitus physiopathology and to discuss them in light of the current knowledge of the neurobiology of psychiatric disorders. Methods. Relevant literature was identified through a search on Medline and PubMed; search terms included tinnitus, brain, plasticity, cortex, network, and pathways. Results. Tinnitus phenomenon results from systemic-neurootological triggers followed by neuronal remapping within several auditory and nonauditory pathways. Plastic reorganization and white matter alterations within limbic system, arcuate fasciculus, insula, salience network, dorsolateral prefrontal cortex, auditory pathways, ffrontocortical, and thalamocortical networks are discussed. Discussion. Several overlapping brain network alterations do exist between tinnitus and psychiatric disorders. Tinnitus, initially related to a clinicoanatomical approach based on a cortical localizationism, could be better explained by an holistic or associationist approach considering psychic functions and tinnitus as emergent properties of partially overlapping large-scale neural networks.
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48
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Adjamian P, Hall DA, Palmer AR, Allan TW, Langers DRM. Neuroanatomical abnormalities in chronic tinnitus in the human brain. Neurosci Biobehav Rev 2014; 45:119-33. [PMID: 24892904 PMCID: PMC4148481 DOI: 10.1016/j.neubiorev.2014.05.013] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 05/19/2014] [Accepted: 05/25/2014] [Indexed: 12/23/2022]
Abstract
We review brain anatomical studies of tinnitus. We evaluate the “gating mechanism” in light of the evidence from these studies. We discuss the results and the possible causes of disparity between findings. Overall, the evidence for structural abnormalities in tinnitus is unconvincing. We identify methodological concerns and suggest strategies for future research.
In this paper, we review studies that have investigated brain morphology in chronic tinnitus in order to better understand the underlying pathophysiology of the disorder. Current consensus is that tinnitus is a disorder involving a distributed network of peripheral and central pathways in the nervous system. However, the precise mechanism remains elusive and it is unclear which structures are involved. Given that brain structure and function are highly related, identification of anatomical differences may shed light upon the mechanism of tinnitus generation and maintenance. We discuss anatomical changes in the auditory cortex, the limbic system, and prefrontal cortex, among others. Specifically, we discuss the gating mechanism of tinnitus and evaluate the evidence in support of the model from studies of brain anatomy. Although individual studies claim significant effects related to tinnitus, outcomes are divergent and even contradictory across studies. Moreover, results are often confounded by the presence of hearing loss. We conclude that, at present, the overall evidence for structural abnormalities specifically related to tinnitus is poor. As this area of research is expanding, we identify some key considerations for research design and propose strategies for future research.
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Affiliation(s)
- Peyman Adjamian
- MRC Institute of Hearing Research, University Park, Nottingham NG7 2RD, United Kingdom.
| | - Deborah A Hall
- National Institute for Health Research (NIHR), Nottingham Hearing Biomedical Research Unit, University of Nottingham, Ropewalk House, 113 The Ropewalk, Nottingham NG1 5DU, United Kingdom; Otology and Hearing Group, Division of Clinical Neuroscience, School of Medicine, University of Nottingham, Nottingham NG7 2UH, United Kingdom
| | - Alan R Palmer
- MRC Institute of Hearing Research, University Park, Nottingham NG7 2RD, United Kingdom
| | - Thomas W Allan
- MRC Institute of Hearing Research, University Park, Nottingham NG7 2RD, United Kingdom
| | - Dave R M Langers
- National Institute for Health Research (NIHR), Nottingham Hearing Biomedical Research Unit, University of Nottingham, Ropewalk House, 113 The Ropewalk, Nottingham NG1 5DU, United Kingdom; Otology and Hearing Group, Division of Clinical Neuroscience, School of Medicine, University of Nottingham, Nottingham NG7 2UH, United Kingdom
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49
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Benson RR, Gattu R, Cacace AT. Left hemisphere fractional anisotropy increase in noise-induced tinnitus: a diffusion tensor imaging (DTI) study of white matter tracts in the brain. Hear Res 2013; 309:8-16. [PMID: 24212050 DOI: 10.1016/j.heares.2013.10.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 10/17/2013] [Accepted: 10/22/2013] [Indexed: 11/17/2022]
Abstract
Diffusion tensor imaging (DTI) is a contemporary neuroimaging modality used to study connectivity patterns and microstructure of white matter tracts in the brain. The use of DTI in the study of tinnitus is a relatively unexplored methodology with no studies focusing specifically on tinnitus induced by noise exposure. In this investigation, participants were two groups of adults matched for etiology, age, and degree of peripheral hearing loss, but differed by the presence or absence (+/-) of tinnitus. It is assumed that matching individuals on the basis of peripheral hearing loss, allows for differentiating changes in white matter microstructure due to hearing loss from changes due to the effects of chronic tinnitus. Alterations in white matter tracts, using the fractional anisotropy (FA) metric, which measures directional diffusion of water, were quantified using tract-based spatial statistics (TBSS) with additional details provided by in vivo probabilistic tractography. Our results indicate that 10 voxel clusters differentiated the two groups, including 9 with higher FA in the group with tinnitus. A decrease in FA was found for a single cluster in the group with tinnitus. However, seven of the 9 clusters with higher FA were in left hemisphere thalamic, frontal, and parietal white matter. These foci were localized to the anterior thalamic radiations and the inferior and superior longitudinal fasciculi. The two right-sided clusters with increased FA were located in the inferior fronto-occipital fasciculus and superior longitudinal fasciculus. The only decrease in FA for the tinnitus-positive group was found in the superior longitudinal fasciculus of the left parietal lobe.
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Affiliation(s)
| | - Ramtilak Gattu
- Department of Radiology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Anthony T Cacace
- Department of Communication Sciences & Disorders, Wayne State University, 207 Rackham, 60 Farnsworth, Detroit, MI 48202, USA.
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50
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Song JJ, Vanneste S, Schlee W, Van de Heyning P, De Ridder D. Onset-related differences in neural substrates of tinnitus-related distress: the anterior cingulate cortex in late-onset tinnitus, and the frontal cortex in early-onset tinnitus. Brain Struct Funct 2013; 220:571-84. [PMID: 24135769 DOI: 10.1007/s00429-013-0648-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 10/03/2013] [Indexed: 11/26/2022]
Affiliation(s)
- Jae-Jin Song
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, 166 Gumi-Ro, Bundang-Gu, Gyeonggi-Do 463-707, Korea,
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