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Pan S, Hu Y, Zhang H, He Y, Tian C, Lei J. The Current Status and Trends of Research Related to Vestibular Disorders, Vertigo, and Cognitive Impairment in the Elderly Population: A Bibliometric Analysis. EAR, NOSE & THROAT JOURNAL 2024:1455613241257396. [PMID: 38818829 DOI: 10.1177/01455613241257396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024] Open
Abstract
Background: The vestibular system not only supports reflex function at the brainstem level, but is also associated with higher levels of cognitive function. Vertigo due to vestibular disorders may lead to or be associated with cognitive dysfunction. Patients with deficits of both vestibular as well as cognitive function may be at particularly high risk for events like falls or certain diseases, such as Alzheimer's. Objective: To analyze the current state of research and trends in the global research literature regarding the correlation between vestibular disorders, vertigo, and cognitive impairment. Methods: We utilized Bibliometrix package to search databases including PubMed, Web of Science, etc for search terms. Results: Databases were searched up to December 15, 2022, and a total of 2222 publications were retrieved. Ultimately, 53 studies were included. A total of 261 authors published in 38 journals and conferences with an overall increasing annual growth rate of 6.94%. The most-published journal was Frontiers in Neurology. The most-published country was the United States, followed by Italy and Brazil. The most-published institution was Johns Hopkins University with a total of 13 articles. On performing trend analysis, we found that the most frequent focus of research in this field include the testing of vestibular perception, activation of the brain-related cortex, and the influence of stimulus-triggered vestibular snail reflex on visual space. The potential focal points are the risk of falling and the ability to extract spatial memory information, and the focus of research in recent decades has revolved around balance, falling, and Alzheimer's disease. Conclusions: Vestibular impairment in older adults affects cognitive function, particularly immediate memory, visuospatial cognition, and attention, with spatial cognition being the most significantly affected. In the future, virtual reality-based vestibular rehabilitation techniques and caloric stimulation could be potential interventions for the treatment of cognitive impairment.
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Affiliation(s)
- Sijia Pan
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yuanjia Hu
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
| | - Huiying Zhang
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yunfan He
- School of Public Health, Zhejiang University, Hangzhou, Zhejiang, China
| | - Chenghua Tian
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jianbo Lei
- Institute of Medical Technology, Health Science Center, Peking University, Beijing, China
- Center for Medical Informatics, Health Science Center, Peking University, Beijing, China
- School of Medical Informatics and Engineering, Southwest Medical University, Luzhou, Sichuan, China
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2
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Gui M, Lv L, Qin L, Wang C. Vestibular dysfunction in Parkinson's disease: a neglected topic. Front Neurol 2024; 15:1398764. [PMID: 38846039 PMCID: PMC11153727 DOI: 10.3389/fneur.2024.1398764] [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: 03/12/2024] [Accepted: 05/14/2024] [Indexed: 06/09/2024] Open
Abstract
Dizziness and postural instability are frequently observed symptoms in patient with Parkinson's disease (PD), potentially linked to vestibular dysfunction. Despite their significant impact on quality of life, these symptoms are often overlooked and undertreated in clinical practice. This review aims to summarize symptoms associated with vestibular dysfunction in patients with PD and discusses vestibular-targeted therapies for managing non-specific dizziness and related symptoms. We conducted searches in PubMed and Web of Science using keywords related to vestibular dysfunction, Parkinson's disease, dizziness, and postural instability, alongside the reference lists of relevant articles. The available evidence suggests the prevalence of vestibular dysfunction-related symptoms in patients with PD and supports the idea that vestibular-targeted therapies may be effective in improving PD symptoms.
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Affiliation(s)
- Meilin Gui
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Lingling Lv
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Lixia Qin
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, China
- China National Clinical Research Center on Mental Disorders, Changsha, China
| | - Chunyu Wang
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, China
- Department of Medical Genetics, The Second Xiangya Hospital, Central South University, Changsha, China
- Key Laboratory of Hunan Province in Neurodegenerative Disorders, Central South University, Changsha, China
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3
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Smith PF. Aging of the vestibular system and its relationship to dementia. Curr Opin Neurol 2024; 37:83-87. [PMID: 38038627 DOI: 10.1097/wco.0000000000001231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
PURPOSE OF REVIEW Since October 2022, substantial new information has been published on age-related effects on the vestibular system. Since much of this evidence relates to the risk of dementia, the purpose of this review will be to provide an overview of this new information and critically evaluate it. RECENT FINDINGS This review will address studies published since October 2022 regarding age-related effects on the vestibular system and their relationship to cognition and dementia. There has been a particular increase in the last year in the number of studies relating aging of the vestibular system to Alzheimer's disease (AD), further supporting the view that vestibular dysfunction is associated with an increased risk of dementia. SUMMARY The conclusion of these recent studies is that, consistent with previous studies, vestibular function declines with age, and that this age-related decline is associated with cognitive impairment and an increased risk of dementia. Efforts are being made to consider these implications for cognition in the treatment of vestibular disorders.
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Affiliation(s)
- Paul F Smith
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, and the Brain Health Research Centre, University of Otago, Dunedin
- Eisdell Moore Centre for Hearing and Balance Research, University of Auckland, Auckland, New Zealand
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Schöne CG, Mast FW. High-current galvanic vestibular stimulation impairs working memory span, but not other executive functions. Neuropsychologia 2023; 188:108617. [PMID: 37302752 DOI: 10.1016/j.neuropsychologia.2023.108617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 06/02/2023] [Accepted: 06/08/2023] [Indexed: 06/13/2023]
Abstract
Patients with peripheral vestibular dysfunction (PVD) suffer not only from physical problems such as imbalance or vertigo but also from neuropsychological difficulties, including executive deficits. However, it is unclear whether the PVD directly causes executive problems. To examine the causal vestibular influence on executive functions, we induced either high-current (2 mA), low-current (0.8 mA), or sham current (0 mA) galvanic vestibular stimulation (GVS) in 79 healthy participants. Participants solved three tasks, measuring the core executive components (working memory, inhibition, cognitive flexibility) before and during GVS. High-current GVS impaired working memory span, but not inhibition and cognitive flexibility performance. Low-current GVS did not influence executive performance. Results indicate a causal vestibular influence on working memory span. Joint cortical areas of vestibular and working memory processing are discussed. Since high-current GVS in healthy participants serves as a model for an artificial vestibular dysfunction, our results could improve the diagnostics and therapy of patients with PVD.
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Affiliation(s)
- Corina G Schöne
- Department of Psychology, University of Bern, Bern, Switzerland; Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, University Hospital Bern, University of Bern, Bern, Switzerland; Doctoral Program for Brain and Behavioral Sciences, University of Bern, Bern, Switzerland.
| | - Fred W Mast
- Department of Psychology, University of Bern, Bern, Switzerland
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5
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Smith PF. Interpreting the meaning of changes in hippocampal volume associated with vestibular loss. Front Integr Neurosci 2023; 17:1254972. [PMID: 37608860 PMCID: PMC10440551 DOI: 10.3389/fnint.2023.1254972] [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: 07/07/2023] [Accepted: 07/21/2023] [Indexed: 08/24/2023] Open
Abstract
Many studies have documented cognitive deficits, especially spatial cognitive deficits, in patients with some form of vestibular loss. Almost 20 years ago, hippocampal (HPC) atrophy was reported to be correlated with spatial memory deficits in such patients and the idea has gradually emerged that HPC atrophy may be causally responsible for the cognitive deficits. However, the results of studies of HPC volume following vestibular loss have not always been consistent, and a number of studies have reported no evidence of HPC atrophy. This paper argues that HPC atrophy, if it does occur following vestibular loss, may not be directly, causally responsible for the cognitive deficits, and that it is more likely that rapid functional changes in the HPC are responsible, due to the interruption of the transmission of vestibular information to the HPC. The argument presented here rests on 3 tranches of evidence: (1) Cognitive deficits have been observed in humans even in the absence of HPC atrophy; (2) HPC atrophy has not been reported in animal studies following vestibular loss, despite cognitive deficits; and (3) Animal studies have shown that the interruption of the transmission of vestibular information to the HPC has immediate consequences for HPC place cells, far too quickly to be explained by HPC atrophy. It is possible that HPC atrophy, when it does occur, is related to the longer-term consquences of living with vestibular loss, which are likely to increase circulating cortisol.
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Affiliation(s)
- Paul F. Smith
- Department of Pharmacology and Toxicology, Brain Health Research Centre, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
- The Brain Research New Zealand Centre of Research Excellence, Eisdell Moore Centre for Hearing and Balance Research, University of Auckland, Auckland, New Zealand
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6
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Tighilet B, Trico J, Xavier F, Chabbert C. [Animal models of balance pathologies: New tools to study peripheral vestibulopathies]. Med Sci (Paris) 2023; 39:632-642. [PMID: 37695153 DOI: 10.1051/medsci/2023097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023] Open
Abstract
The different types of peripheral vestibulopathies (PVs) or peripheral vestibular disorders (PVDs) are essentially diagnosed on the basis of their clinical expression. The heterogeneity of vestibular symptoms makes it difficult to stratify patients for therapeutic management. Animal models of PVs are a good mean to search for clinical evaluation criteria allowing to objectively analyze the kinetics of expression of the vertigo syndrome and to evaluate the benefits of therapeutic strategies, whether they are pharmacological or rehabilitative. The question of the predictability of these animal models is therefore crucial for the identification of behavioral and biological biomarkers that could then be used in the human clinic. In this review, we propose an overview of the different animal models of PVs, and discuss their relevance for the understanding of the underlying pathophysiological mechanisms and the development of new and more targeted therapeutic approaches.
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Affiliation(s)
- Brahim Tighilet
- Aix Marseille université-CNRS, Laboratoire de neurosciences cognitives, LNC UMR 7291, Marseille, France - Groupements de recherche (GDR) Vertige, Unité CNRS GDR2074, Marseille, France
| | - Jessica Trico
- Aix Marseille université-CNRS, Laboratoire de neurosciences cognitives, LNC UMR 7291, Marseille, France - Groupements de recherche (GDR) Vertige, Unité CNRS GDR2074, Marseille, France
| | - Frédéric Xavier
- Aix Marseille université-CNRS, Laboratoire de neurosciences cognitives, LNC UMR 7291, Marseille, France - Groupements de recherche (GDR) Vertige, Unité CNRS GDR2074, Marseille, France
| | - Christian Chabbert
- Aix Marseille université-CNRS, Laboratoire de neurosciences cognitives, LNC UMR 7291, Marseille, France - Groupements de recherche (GDR) Vertige, Unité CNRS GDR2074, Marseille, France
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7
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Elyoseph Z, Geisinger D, Zaltzman R, Hartman TG, Gordon CR, Mintz M. The overarching effects of vestibular deficit: Imbalance, anxiety, and spatial disorientation. J Neurol Sci 2023; 451:120723. [PMID: 37393737 DOI: 10.1016/j.jns.2023.120723] [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: 01/17/2023] [Revised: 06/19/2023] [Accepted: 06/24/2023] [Indexed: 07/04/2023]
Abstract
BACKGROUND Comorbid Balance, Anxiety, and Spatial symptoms are observed in neurodevelopmental disorders and aging. Each of these symptoms was studied separately in association with vestibular hypofunction. We aimed to investigate whether such a diffuse range of symptoms has common vestibular pathophysiology. Specifically, we tested whether this Triad of dysfunctions is associated with central or peripheral vestibular hypofunction. We also assessed the possible contribution of semicircular canals (SCCs) vs. saccular function. METHODS We tested patients with Peripheral bilateral and unilateral Vestibular Hypofunction (PVH), Machado Joseph Disease (MJD) with cerebellar and central bilateral vestibular hypofunction, and healthy controls. SCCs and sacculi functioning were evaluated by the video Head Impulse Test (vHIT) and cervical Vestibular Evoked Myogenic Potentials (cVEMP), respectively. Balance was assessed by the Activities-specific Balance Confidence scale (ABC), anxiety by the Hamilton Anxiety Rating Scale (HAM-A), and spatial orientation by the Object Perspective Taking test (OPT-t). RESULTS PVH patients with vestibular SCCs and saccular hypofunction presented the Triad of symptoms, imbalance, anxiety, and spatial disorientation. MJD patients with SCCs-related vestibular hypofunction but preserved saccular-related vestibular function presented with a partial profile of imbalance and spatial disorientation. CONCLUSIONS The present study provides evidence that peripheral vestibular hypofunction is associated with the Triad of dysfunctions, i.e., imbalance, anxiety, and spatial disorientation. The combination of SCCs and saccular hypofunction seems to contribute to the emergence of the Triad of symptoms.
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Affiliation(s)
- Zohar Elyoseph
- School of Psychological Sciences, Tel Aviv University, Tel Aviv, Israel; The Center for Psychobiological Research, Department of Educational Psychology and Educational Counseling, Max Stern Yezreel Valley College, Jezreel Valley, Israel.
| | - Dario Geisinger
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Roy Zaltzman
- Department of Neurology, Meir Medical Center, Kfar Saba, Israel
| | - Tamar G Hartman
- School of Psychological Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Carlos R Gordon
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel; Department of Neurology, Meir Medical Center, Kfar Saba, Israel; Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
| | - Matti Mintz
- School of Psychological Sciences, Tel Aviv University, Tel Aviv, Israel; Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
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8
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El Mahmoudi N, Laurent C, Péricat D, Watabe I, Lapotre A, Jacob PY, Tonetto A, Tighilet B, Sargolini F. Long-lasting spatial memory deficits and impaired hippocampal plasticity following unilateral vestibular loss. Prog Neurobiol 2023; 223:102403. [PMID: 36821981 DOI: 10.1016/j.pneurobio.2023.102403] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 11/25/2022] [Accepted: 01/04/2023] [Indexed: 02/23/2023]
Abstract
Unilateral vestibular loss (UVL) induces a characteristic vestibular syndrome composed of various posturo-locomotor, oculomotor, vegetative and perceptivo-cognitive symptoms. Functional deficits are progressively recovered over time during vestibular compensation, that is supported by the expression of multiscale plasticity mechanisms. While the dynamic of post-UVL posturo-locomotor and oculomotor deficits is well characterized, the expression over time of the cognitive deficits, and in particular spatial memory deficits, is still debated. In this study we aimed at investigating spatial memory deficits and their recovery in a rat model of unilateral vestibular neurectomy (UVN), using a wide spectrum of behavioral tasks. In parallel, we analyzed markers of hippocampal plasticity involved in learning and memory. Our results indicate the UVN affects all domains of spatial memory, from working memory to reference memory and object-in-place recognition. These deficits are associated with long-lasting impaired plasticity in the ipsilesional hippocampus. These results highlight the crucial role of symmetrical vestibular information in spatial memory and contribute to a better understanding of the cognitive disorders observed in vestibular patients.
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Affiliation(s)
- Nada El Mahmoudi
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France.
| | - Célia Laurent
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France
| | - David Péricat
- Université de Toulouse Paul Sabatier -CNRS, Institut de pharmacologie et de biologie structurale, Toulouse, France
| | - Isabelle Watabe
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France
| | - Agnès Lapotre
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France
| | - Pierre-Yves Jacob
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France
| | - Alain Tonetto
- Aix Marseille Université-CNRS, Centrale Marseille, FSCM (FR 1739), PRATIM, F-13397 Marseille, France
| | - Brahim Tighilet
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France
| | - Francesca Sargolini
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France.
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Sarkisyan SH, Danielyan MH, Darbinyan LV, Simonyan KV, Chavushyan VA. The effects of vibration on the neuronal activity of lateral vestibular nuclei in unilaterally labyrinthectomized rats. Brain Struct Funct 2023; 228:463-473. [PMID: 36301353 DOI: 10.1007/s00429-022-02588-6] [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: 04/25/2022] [Accepted: 10/19/2022] [Indexed: 11/28/2022]
Abstract
Unilateral labyrinthectomy causes distinct oculomotor and postural disorder syndromes that gradually deteriorate. Simultaneously, compensatory mechanisms for the suppression of pathological disorders were activated. The current study aimed to investigate the characteristics of impulse activity in the ipsilateral and contralateral neurons of the lateral vestibular nucleus of unilaterally labyrinthectomized rats during various periods of vibration exposure. A program analysis of the background impulse activity of the neurons in the right- and left-lateral vestibular nuclei of rats under normal condition and after right-sided labyrinthectomy was performed. The animals were subjected to different periods of vibration exposure 2 days after surgery (5-, 10-, and 15-day periods). A comparison of the characteristics of the background impulse activity of neurons in both nuclei of intact rats revealed an initial asymmetry in the values of the mean impulse frequency and coefficient of variation of interimpulse intervals. After 5 days of vibration exposure, the values of the mean impulse frequency of neurons in both Deiters' nuclei were almost equal in labyrinthectomized rats. The mean impulse frequency of neurons on the uninjured side was higher than that on the injured side on the days following vibration exposure. The characteristics and functional significance of the findings are discussed.
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Affiliation(s)
- S H Sarkisyan
- Department of Human and Animal Physiology, Yerevan State University, Yerevan, Armenia
| | - M H Danielyan
- Histochemistry and Electron Microscopy Lab, Orbeli Institute of Physiology NAS RA, Yerevan, Armenia
| | - L V Darbinyan
- Sensorimotor Integration Lab, Orbeli Institute of Physiology NAS RA, Yerevan, Armenia
| | - K V Simonyan
- Neuroendocrine Relationships Lab, Orbeli Institute of Physiology NAS RA, Yerevan, Armenia.
| | - V A Chavushyan
- Neuroendocrine Relationships Lab, Orbeli Institute of Physiology NAS RA, Yerevan, Armenia
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10
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Ide R, Ota M, Hada Y, Takahashi T, Tamura M, Nemoto K, Arai T. Relationship between hippocampal subfields volume and balance function in healthy older adults. Gait Posture 2023; 101:90-94. [PMID: 36764212 DOI: 10.1016/j.gaitpost.2023.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 01/08/2023] [Accepted: 02/03/2023] [Indexed: 02/12/2023]
Abstract
BACKGROUND The volume of the hippocampus and its subfields is known to be affected by aging, disease, and physical training. In regard to training, the differential effects of aerobic exercise and dance training on the subfield volume suggest that balance function may be involved. However, the relationship between balance function and the volume of the hippocampus and its subfields remains unclear. METHODS Subjects were 30 cognitively intact individuals. They underwent balance tests, cognitive tests and structural MRI scans. The balance index measured was the index of postural stability (IPS) under a visual block condition and/or a proprioception block condition. MR images acquired using a 3-tesla system and three-dimensional T1-weighted images were segmented in the hippocampal subfield with Freesurfer 6.0.0. The relationship between the IPS and hippocampal volume was evaluated. RESULTS A positive correlation was observed only between the IPS closed eyes/soft surface condition and whole hippocampal volume ratio. In the subfields, positive correlations were found between the IPS and molecular layer of the hippocampus, granule cell layer of the dentate gyrus (GC-ML-DG), and cornu ammonis areas (CA)3 and CA4. These correlations were stronger under the closed eyes/soft surface condition than under the other conditions. CONCLUSIONS A correlation between balance function and the volume of the hippocampus and subfields was found in healthy elderly subjects. The balance function may be involved in the volume of the whole hippocampus and specific subfields. The IPS closed eyes/soft surface condition is considered to reflect vestibular function. Thus, IPS may be useful in evaluations of the relationship between the vestibular system function via the hippocampus and balance.
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Affiliation(s)
- Ryotaro Ide
- Doctoral Program in Medical Sciences, Graduate School of Comprehensive Human Science, University of Tsukuba, Tennodai, Tsukuba, Ibaraki, Japan
| | - Miho Ota
- Department of Neuropsychiatry, Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Tennodai, Tsukuba, Ibaraki, Japan.
| | - Yasushi Hada
- Department of Rehabilitation Medicine, Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Tennodai, Tsukuba, Ibaraki, Japan
| | - Takumi Takahashi
- Department of Neuropsychiatry, Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Tennodai, Tsukuba, Ibaraki, Japan
| | - Masashi Tamura
- Department of Neuropsychiatry, Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Tennodai, Tsukuba, Ibaraki, Japan
| | - Kiyotaka Nemoto
- Department of Neuropsychiatry, Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Tennodai, Tsukuba, Ibaraki, Japan
| | - Tetsuaki Arai
- Department of Neuropsychiatry, Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Tennodai, Tsukuba, Ibaraki, Japan
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Kumar Goothy SS, Gawarikar S, Choudhary A, Gajanan Govind P, Purohit M, Pathak A, Chouhan RS, Vijay Khanderao M. Effectiveness of electrical vestibular nerve stimulation as adjunctive therapy to improve the cognitive functions in patients with Parkinson's disease. J Basic Clin Physiol Pharmacol 2023; 34:77-82. [PMID: 36103719 DOI: 10.1515/jbcpp-2022-0066] [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: 03/08/2022] [Accepted: 08/26/2022] [Indexed: 01/27/2023]
Abstract
OBJECTIVES The present study was undertaken to observe the effectiveness of electrical vestibular stimulation in improving cognitive functions in patients with Parkinson's disease. METHODS Randomized controlled trial (ClinicalTrials.gov Identifier: NCT04450550). 30 cases of PD, including both males and females were recruited in the study by convenient sampling after obtaining written informed consent. After recruiting, the participants were randomly assigned into two groups. The control group (n=15) received placebo stimulation whereas the intervention group (n=15) received electrical vestibular stimulation administered for 12 weeks. Auditory, visual reaction time and spatial and verbal memory were recorded before and after 6 weeks and after 12 weeks of intervention and compared. RESULTS There was a significant improvement in both auditory and visual reaction time of right and left-hand responses. Also, significant improvement was observed in both the spatial and verbal memory of the patients. CONCLUSIONS There was a significant improvement in the auditory and visual reaction time and spatial and verbal memory in the participants after the electrical vestibular nerve stimulation administration. No side effects were reported by the study participants and they have expressed willingness to continue the intervention after the study period also. The study recommends further detailed studies with a higher sample size to adopt electrical vestibular nerve stimulation as adjunctive therapy in the management of Parkinson's disease.
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Affiliation(s)
| | - Sudhir Gawarikar
- Department of General Medicine, R.D.Gardi Medical College, Ujjain, MP, India
| | - Anita Choudhary
- Department of Physiology, R.D.Gardi Medical College, Ujjain, MP, India
| | | | - Manju Purohit
- Department of Pathology, R.D.Gardi Medical College, Ujjain, MP, India.,Department of Global Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Ashish Pathak
- Department of Paediatrics, R.D.Gardi Medical College, Ujjain, MP, India
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12
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Preysner TA, Gardi AZ, Ahmad S, Sharon JD. Vestibular Migraine: Cognitive Dysfunction, Mobility, Falls. Otol Neurotol 2022; 43:1216-1221. [PMID: 36136612 DOI: 10.1097/mao.0000000000003700] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
OBJECTIVE Recent evidence has shown that vestibular migraine is strongly associated with cognitive difficulties. However, limited data exist on real-world effects of that dysfunction. The objective of this study is to understand the epidemiology of cognitive dysfunction with vestibular migraine and associated sequelae using National Health Interview Survey data. STUDY DESIGN Randomized, population-based survey study of US adults. SETTING We generated a case definition approximating probable vestibular migraine based on Bárány Society criteria and validated that definition in a tertiary care vestibular clinic. PATIENTS Adult respondents to the 2016 NHIS, which queries a representative sample of the civilian, noninstitutionalized US population. INTERVENTION Diagnostic. MAIN OUTCOME MEASURES We evaluated incidence of self-reported cognitive dysfunction with vestibular migraine and whether individuals were more likely to have impaired mobility, falls, and work absenteeism than those without either condition. RESULTS Among individuals with vestibular migraine, 40% reported "some" and 12% reported "a lot" of difficulty thinking versus 13% and 2% of those without vestibular migraine, respectively. Vestibular migraine sufferers were more likely to have difficulty thinking or remembering compared with respondents without dizziness (odds ratio, 7.43; 95% confidence interval, 6.06-9.10; p < 0.001) when controlled for age, sex, education, stroke, smoking, heart disease, and diabetes. Individuals with both vestibular migraine and cognitive dysfunction had fivefold increased odds of falls and 10-fold increased odds of mobility issues compared with those without either condition. Furthermore, individuals with both vestibular migraine and cognitive dysfunction missed 12.8 more days of work compared to those without either condition. CONCLUSION Our findings indicate vestibular migraine is not only associated with cognitive dysfunction, but they are together associated with mobility issues, fall risk, and work absenteeism.
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Affiliation(s)
- Thi A Preysner
- Department of Otolaryngology-Head and Neck Surgery, University of California-San Francisco School of Medicine
| | - Adam Z Gardi
- Department of Otolaryngology-Head and Neck Surgery, University of California-San Francisco School of Medicine
| | - Sarah Ahmad
- Division of Headache Medicine, Department of Neurology, University of California-San Francisco School of Medicine, San Francisco, California
| | - Jeffrey D Sharon
- Department of Otolaryngology-Head and Neck Surgery, University of California-San Francisco School of Medicine
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13
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What Predictability for Animal Models of Peripheral Vestibular Disorders? Biomedicines 2022; 10:biomedicines10123097. [PMID: 36551852 PMCID: PMC9775358 DOI: 10.3390/biomedicines10123097] [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: 10/21/2022] [Revised: 11/16/2022] [Accepted: 11/22/2022] [Indexed: 12/04/2022] Open
Abstract
The different clinical entities grouped under the term peripheral vestibulopathies (PVs) or peripheral vestibular disorders (PVDs) are distinguished mainly based on their symptoms/clinical expression. Today, there are very few commonly accepted functional and biological biomarkers that can confirm or refute whether a vestibular disorder belongs to a precise classification. Consequently, there is currently a severe lack of reliable and commonly accepted clinical endpoints, either to precisely follow the course of the vertigo syndrome of vestibular origin or to assess the benefits of therapeutic approaches, whether they are pharmacological or re-educational. Animal models of PV are a good means to identify biomarkers that could subsequently be exploited in human clinical practice. The question of their predictability is therefore crucial. Ten years ago, we had already raised this question. We revisit this concept today in order to take into account the animal models of peripheral vestibular pathology that have emerged over the last decade, and the new technological approaches available for the behavioral assessment of vestibular syndrome in animals and its progression over time. The questions we address in this review are the following: are animal models of PV predictive of the different types and stages of vestibular pathologies, and if so, to what extent? Are the benefits of the pharmacological or reeducational therapeutic approaches achieved on these different models of PV (in particular the effects of attenuation of the acute vertigo, or acceleration of central compensation) predictive of those expected in the vertiginous patient, and if so, to what extent?
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14
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Zhang X, Huang Y, Xia Y, Yang X, Zhang Y, Wei C, Ying H, Liu Y. Vestibular dysfunction is an important contributor to the aging of visuospatial ability in older adults–Data from a computerized test system. Front Neurol 2022; 13:1049806. [PMID: 36468053 PMCID: PMC9714458 DOI: 10.3389/fneur.2022.1049806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 11/01/2022] [Indexed: 11/19/2022] Open
Abstract
BackgroundA convergence of research supports a key role of the vestibular system in visuospatial ability. However, visuospatial ability may decline with age. This work aims to elucidate the important contribution of vestibular function to visuospatial ability in old adults through a computerized test system.MethodsPatients with a clinical history of recurrent vertigo and at least failed one vestibular test were included in this cross-sectional study. Healthy controls of three age groups: older, middle-aged, and young adults were also involved. Visuospatial cognitive outcomes including spatial memory, spatial navigation, and mental rotation of all the groups were recorded. Comparing the performance of the visuospatial abilities between patients and age-matched controls as well as within the controls.ResultsA total of 158 individuals were enrolled. Results showed that patients performed worse than the age-matched controls, with the differences in the forward span (p < 0.001), the time of the maze 8 × 8 (p = 0.009), and the time of the maze 12 × 12 (p = 0.032) being significant. For the differences in visuospatial cognitive outcomes within the controls, the younger group had a significantly better performance than the other groups. The older group and the middle-aged group had comparable performances during all the tests.ConclusionsOlder patients with vestibular dysfunction had more difficulties during visuospatial tasks than age-matched controls, especially in spatial memory and spatial navigation. Within the controls, younger adults did much better than other age groups, while older adults behaved similarly to middle-aged adults. It is a valuable attempt to computerize the administration of tests for visuospatial ability.
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Affiliation(s)
- Xuehao Zhang
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yan Huang
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yuqi Xia
- Department of Otolaryngology, Head and Neck Surgery, Peking University First Hospital, Beijing, China
| | - Xiaotong Yang
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yanmei Zhang
- Department of Otolaryngology, Head and Neck Surgery, Peking University First Hospital, Beijing, China
| | - Chaogang Wei
- Department of Otolaryngology, Head and Neck Surgery, Peking University First Hospital, Beijing, China
| | - Hang Ying
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yuhe Liu
- Department of Otolaryngology, Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- *Correspondence: Yuhe Liu
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15
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Hilber P. The Role of the Cerebellar and Vestibular Networks in Anxiety Disorders and Depression: the Internal Model Hypothesis. CEREBELLUM (LONDON, ENGLAND) 2022; 21:791-800. [PMID: 35414040 DOI: 10.1007/s12311-022-01400-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/28/2022] [Indexed: 06/14/2023]
Abstract
Clinical data and animal studies confirmed that the cerebellum and the vestibular system are involved in emotions. Nowadays, no real consensus has really emerged to explain the clinical symptoms in humans and behavioral deficits in the animal models. We envisage here that the cerebellum and the vestibular system play complementary roles in emotional reactivity. The cerebellum integrates a large variety of exteroceptive and proprioceptive information necessary to elaborate and to update the internal model: in emotion, as in motor processes, it helps our body and self to adapt to the environment, and to anticipate any changes in such environment in order to produce a time-adapted response. The vestibular system provides relevant environmental stimuli (i.e., gravity, self-position, and movement) and is involved in self-perception. Consequently, cerebellar or vestibular disorders could generate « internal fake news» (due to lack or false sensory information and/or integration) that could, in turn, generate potential internal model deficiencies. In this case, the alterations provoke false anticipation of motor command and external sensory feedback, associated with unsuited behaviors. As a result, the individual becomes progressively unable to cope with the environmental solicitation. We postulate that chronically unsuited, and potentially inefficient, behavioral and visceral responses to environmental solicitations lead to stressful situations. Furthermore, this inability to adapt to the context of the situation generates chronic anxiety which could precede depressive states.
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Affiliation(s)
- Pascal Hilber
- UNIROUEN, INSERM U1245, Cancer and Brain Genomics, Normandie University, 76000, Rouen, France.
- Institute for Research and Innovation in Biomedicine (IRIB), 76000, Rouen, France.
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16
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Hatat B, Boularand R, Bringuier C, Chanut N, Besnard S, Mueller AM, Weyer K, Seilheimer B, Tighilet B, Chabbert C. Vertigoheel improves central vestibular compensation after unilateral peripheral vestibulopathy in rats. Front Neurol 2022; 13:969047. [PMID: 36212670 PMCID: PMC9541623 DOI: 10.3389/fneur.2022.969047] [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] [Received: 06/14/2022] [Accepted: 08/11/2022] [Indexed: 11/24/2022] Open
Abstract
The aim of this study was to assess the effect of Vertigoheel on central vestibular compensation and cognitive deficits in rats subjected to peripheral vestibular loss. Young adult male Long Evans rats were subjected to bilateral vestibular insults through irreversible sequential ototoxic destructions of the vestibular sensory organs. Vestibular syndrome characteristics were monitored at several time points over days and weeks following the sequential insults, using a combination of behavioral assessment paradigms allowing appreciation of patterns of change in static and dynamic deficits, together with spatial navigation, learning, and memory processes. Vertigoheel administered intraperitoneally significantly improved maximum body velocity and not moving time relative to its vehicle control on days 2 and 3 and on day 2, respectively, after unilateral vestibular lesion (UVL). It also significantly improved postural control relative to its vehicle 1 day after UVL. Conversely, Vertigoheel did not display any significant effect vs. vehicle on the severity of the syndrome, nor on the time course of other examined parameters, such as distance moved, mean body velocity, meander, and rearing. Spatial cognition testing using Y- and T-maze and eight-radial arm maze did not show any statistically significant difference between Vertigoheel and vehicle groups. However, Vertigoheel potentially enhanced the speed of learning in sham animals. Evaluating Vertigoheel's effect on thigmotaxis during the open-field video tracking test revealed no significant difference between Vertigoheel and its vehicle control groups suggesting that Vertigoheel does not seem to induce sedative or anxiolytic effects that could negatively affect vestibular and memory function. Present observations reveal that Vertigoheel improves central vestibular compensation following the unilateral peripheral vestibular loss as demonstrated by improvement of specific symptoms.
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Affiliation(s)
| | | | | | | | - Stéphane Besnard
- Aix Marseille Université-CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Marseille, France
- Unité GDR2074 CNRS, Marseille, France
| | | | | | | | - Brahim Tighilet
- Aix Marseille Université-CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Marseille, France
- Unité GDR2074 CNRS, Marseille, France
- *Correspondence: Brahim Tighilet
| | - Christian Chabbert
- Aix Marseille Université-CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Marseille, France
- Unité GDR2074 CNRS, Marseille, France
- Christian Chabbert
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17
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Chari DA, Madhani A, Sharon JD, Lewis RF. Evidence for cognitive impairment in patients with vestibular disorders. J Neurol 2022; 269:5831-5842. [PMID: 35930032 DOI: 10.1007/s00415-022-11289-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 07/11/2022] [Accepted: 07/12/2022] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Extensive animal research has shown that vestibular damage can be associated with cognitive deficits. More recently, new evidence has emerged linking vestibular disorders to cognitive impairment in humans. Herein, we review contemporary research on the pathophysiology of cognitive-vestibular interactions and discuss its emerging clinical relevance. DATA SOURCES PubMed, Embase, and Cochrane databases. REVIEW METHODS A systematic literature search was performed with combinations of search terms: "cognition," "cognitive impairment," "chronic fatigue," "brain fog," "spatial navigation," "attention," "memory," "executive function," "processing speed," and "vestibular hypofunction." Relevant articles were considered for inclusion, including basic and clinical studies, case series, and major reviews. CONCLUSIONS Patients with vestibular disorders can demonstrate long-term deficits in both spatial and nonspatial cognitive domains. The underlying mechanism(s) linking the vestibular system to cognitive function is not well characterized, but several neuro-biologic correlates have been identified. Additional screening tools are required to identify individuals at risk for cognitive impairment, and further research is needed to determine whether treatment of vestibular dysfunction has the capacity to improve cognitive function. IMPLICATIONS FOR PRACTICE Physicians should be aware of emerging data supporting the presence of cognitive deficits in patients with vestibular disorders. Prevention and treatment of long-term cognitive deficits may be possible through screening and rehabilitation.
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Affiliation(s)
- Divya A Chari
- Department of Otolaryngology - Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA.
- Department of Otolaryngology - Head and Neck Surgery, University of Massachusetts Medical School, Worcester, MA, USA.
- Jenks Vestibular Physiology Lab, Massachusetts Eye and Ear, Boston, MA, USA.
| | - Amsal Madhani
- Jenks Vestibular Physiology Lab, Massachusetts Eye and Ear, Boston, MA, USA
| | - Jeffrey D Sharon
- Department of Otolaryngology - Head and Neck Surgery, University of California San Francisco, San Francisco, CA, USA
| | - Richard F Lewis
- Department of Otolaryngology - Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
- Jenks Vestibular Physiology Lab, Massachusetts Eye and Ear, Boston, MA, USA
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18
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Desai RI, Limoli CL, Stark CEL, Stark SM. Impact of spaceflight stressors on behavior and cognition: A molecular, neurochemical, and neurobiological perspective. Neurosci Biobehav Rev 2022; 138:104676. [PMID: 35461987 DOI: 10.1016/j.neubiorev.2022.104676] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 03/15/2022] [Accepted: 04/18/2022] [Indexed: 11/19/2022]
Abstract
The response of the human body to multiple spaceflight stressors is complex, but mounting evidence implicate risks to CNS functionality as significant, able to threaten metrics of mission success and longer-term behavioral and neurocognitive health. Prolonged exposure to microgravity, sleep disruption, social isolation, fluid shifts, and ionizing radiation have been shown to disrupt mechanisms of homeostasis and neurobiological well-being. The overarching goal of this review is to document the existing evidence of how the major spaceflight stressors, including radiation, microgravity, isolation/confinement, and sleep deprivation, alone or in combination alter molecular, neurochemical, neurobiological, and plasma metabolite/lipid signatures that may be linked to operationally-relevant behavioral and cognitive performance. While certain brain region-specific and/or systemic alterations titrated in part with neurobiological outcome, variations across model systems, study design, and the conspicuous absence of targeted studies implementing combinations of spaceflight stressors, confounded the identification of specific signatures having direct relevance to human activities in space. Summaries are provided for formulating new research directives and more predictive readouts of portending change in neurobiological function.
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Affiliation(s)
- Rajeev I Desai
- Harvard Medical School, McLean Hospital, Behavioral Biology Program, Belmont, MA 02478, USA.
| | - Charles L Limoli
- Department of Radiation Oncology, University of California Irvine, Medical Sciences I, B146B, Irvine, CA 92697, USA
| | - Craig E L Stark
- Department of Neurobiology of Behavior, University of California Irvine, 1400 Biological Sciences III, Irvine, CA 92697, USA
| | - Shauna M Stark
- Department of Neurobiology of Behavior, University of California Irvine, 1400 Biological Sciences III, Irvine, CA 92697, USA
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19
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Gammeri R, Léonard J, Toupet M, Hautefort C, van Nechel C, Besnard S, Machado ML, Nakul E, Montava M, Lavieille JP, Lopez C. Navigation strategies in patients with vestibular loss tested in a virtual reality T-maze. J Neurol 2022; 269:4333-4348. [PMID: 35306619 DOI: 10.1007/s00415-022-11069-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 03/04/2022] [Accepted: 03/05/2022] [Indexed: 01/09/2023]
Abstract
During navigation, humans mainly rely on egocentric and allocentric spatial strategies, two different frames of reference working together to build a coherent representation of the environment. Spatial memory deficits during navigation have been repeatedly reported in patients with vestibular disorders. However, little is known about how vestibular disorders can change the use of spatial navigation strategies. Here, we used a new reverse T-maze paradigm in virtual reality to explore whether vestibular loss specifically modifies the use of egocentric or allocentric spatial strategies in patients with unilateral (n = 23) and bilateral (n = 23) vestibular loss compared to healthy volunteers (n = 23) matched for age, sex and education level. Results showed that the odds of selecting and using a specific strategy in the T-maze were significantly reduced in both unilateral and bilateral vestibular loss. An exploratory analysis suggests that only right vestibular loss decreased the odds of adopting a spatial strategy, indicating an asymmetry of vestibular functions. When considering patients who used strategies to navigate, we observed that a bilateral vestibular loss reduced the odds to use an allocentric strategy, whereas a unilateral vestibular loss decreased the odds to use an egocentric strategy. Age was significantly associated with an overall lower chance to adopt a navigation strategy and, more specifically, with a decrease in the odds of using an allocentric strategy. We did not observe any sex difference in the ability to select and use a specific navigation strategy. Findings are discussed in light of previous studies on visuo-spatial abilities and studies of vestibulo-hippocampal interactions in peripheral vestibular disorders. We discuss the potential impact of the history of the disease (chronic stage in patients with a bilateral vestibulopathy vs. subacute stage in patients with a unilateral vestibular loss), of hearing impairment and non-specific attentional deficits in patients with vestibular disorders.
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Affiliation(s)
- Roberto Gammeri
- Aix Marseille University, CNRS, LNC, FR3C, Marseille, France.,Department of Psychology, University of Turin, Torino, Italy
| | - Jacques Léonard
- Aix Marseille University, CNRS, LNC, FR3C, Marseille, France
| | - Michel Toupet
- IRON, Institut de Recherche en Oto-Neurologie, Paris, France.,Centre d'Explorations Fonctionnelles Oto-Neurologiques, Paris, France
| | - Charlotte Hautefort
- IRON, Institut de Recherche en Oto-Neurologie, Paris, France.,Service ORL, Hôpital Lariboisière, Paris, France
| | - Christian van Nechel
- IRON, Institut de Recherche en Oto-Neurologie, Paris, France.,Unité Troubles de L'Équilibre Et Vertiges, CHU Brugmann, Bruxelles, Belgium.,Unité de Neuro-Ophtalmologie, CHU Erasme, Bruxelles, Belgium.,Clinique Des Vertiges, Bruxelles, Belgium
| | | | | | - Estelle Nakul
- Aix Marseille University, CNRS, LNC, FR3C, Marseille, France
| | - Marion Montava
- Department of Otorhinolaryngology, Head and Neck Surgery, Hôpital La Conception, APHM, Marseille, France
| | - Jean-Pierre Lavieille
- Department of Otorhinolaryngology, Head and Neck Surgery, Hôpital La Conception, APHM, Marseille, France
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20
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Lacroix E, Deggouj N, Edwards MG, Van Cutsem J, Van Puyvelde M, Pattyn N. The Cognitive-Vestibular Compensation Hypothesis: How Cognitive Impairments Might Be the Cost of Coping With Compensation. Front Hum Neurosci 2021; 15:732974. [PMID: 34658819 PMCID: PMC8517512 DOI: 10.3389/fnhum.2021.732974] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 09/10/2021] [Indexed: 11/13/2022] Open
Abstract
Previous research in vestibular cognition has clearly demonstrated a link between the vestibular system and several cognitive and emotional functions. However, the most coherent results supporting this link come from rodent models and healthy human participants artificial stimulation models. Human research with vestibular-damaged patients shows much more variability in the observed results, mostly because of the heterogeneity of vestibular loss (VL), and the interindividual differences in the natural vestibular compensation process. The link between the physiological consequences of VL (such as postural difficulties), and specific cognitive or emotional dysfunction is not clear yet. We suggest that a neuropsychological model, based on Kahneman's Capacity Model of Attention, could contribute to the understanding of the vestibular compensation process, and partially explain the variability of results observed in vestibular-damaged patients. Several findings in the literature support the idea of a limited quantity of cognitive resources that can be allocated to cognitive tasks during the compensation stages. This basic mechanism of attentional limitations may lead to different compensation profiles in patients, with or without cognitive dysfunction, depending on the compensation stage. We suggest several objective and subjective measures to evaluate this cognitive-vestibular compensation hypothesis.
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Affiliation(s)
- Emilie Lacroix
- VIPER Research Unit, LIFE Department, Royal Military Academy, Brussels, Belgium.,Institute for Research in Psychological Science (IPSY), Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Naïma Deggouj
- Institute for Research in Psychological Science (IPSY), Université Catholique de Louvain, Louvain-la-Neuve, Belgium.,Institute of Neuroscience (IONS), Université Catholique de Louvain, Louvain-la-Neuve, Belgium.,Otorhinolaryngology Department, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Martin Gareth Edwards
- Institute for Research in Psychological Science (IPSY), Université Catholique de Louvain, Louvain-la-Neuve, Belgium.,Institute of Neuroscience (IONS), Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Jeroen Van Cutsem
- VIPER Research Unit, LIFE Department, Royal Military Academy, Brussels, Belgium.,Human Physiology and Sports Physiotherapy Research Group, Vrije Universiteit Brussel, Brussels, Belgium
| | - Martine Van Puyvelde
- VIPER Research Unit, LIFE Department, Royal Military Academy, Brussels, Belgium.,Brain Body and Cognition Research Group, Department of Psychology and Educational Sciences, Vrije Universiteit Brussel, Brussels, Belgium.,Clinical and Lifespan Psychology, Department of Psychology and Educational Sciences, Vrije Universiteit Brussel, Brussels, Belgium
| | - Nathalie Pattyn
- VIPER Research Unit, LIFE Department, Royal Military Academy, Brussels, Belgium.,Human Physiology and Sports Physiotherapy Research Group, Vrije Universiteit Brussel, Brussels, Belgium
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21
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Desai RI, Kangas BD, Limoli CL. Nonhuman primate models in the study of spaceflight stressors: Past contributions and future directions. LIFE SCIENCES IN SPACE RESEARCH 2021; 30:9-23. [PMID: 34281669 DOI: 10.1016/j.lssr.2021.03.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/28/2021] [Accepted: 03/31/2021] [Indexed: 06/13/2023]
Abstract
Studies in rodents suggest that exposure to distinct spaceflight stressors (e.g., space radiation, isolation/confinement, microgravity) may have a profound impact on an astronaut's ability to perform both simple and complex tasks related to neurocognitive performance, central nervous system (CNS) and vestibular/sensorimotor function. However, limited information is currently available on how combined exposure to the spaceflight stressors will impact CNS-related neurocognitive and neurobiological function in-flight and, as well, terrestrial risk of manifesting neurodegenerative conditions when astronauts return to earth. This information gap has significantly hindered our ability to realistically estimate spaceflight hazard risk to the CNS associated with deep space exploration. Notwithstanding a significant body of work with rodents, there have been very few direct investigations of the impact of these spaceflight stressors in combination and, to our knowledge, no such investigations using nonhuman primate (NHP) animal models. In view of the widely-recognized translational value of NHP data in advancing biomedical discoveries, this research deficiency limits our understanding regarding the impact of individual and combined spaceflight stressors on CNS-related neurobiological function. In this review, we address this knowledge gap by conducting a systematic and comprehensive evaluation of existing research on the impact of exposure to spaceflight stressors on NHP CNS-related function. This review is structured to: a) provide an overarching view of the past contributions of NHPs to spaceflight research as well as the strengths, limitations, and translational value of NHP research in its own right and within the existing context of NASA-relevant rodent research; b) highlight specific conclusions based on the published literature and areas needed for future endeavors; c) describe critical research gaps and priorities in NHP research to facilitate NASA's efforts to bridge the key knowledge gaps that currently exist in translating rodent data to humans; and d) provide a roadmap of recommendations for NASA regarding the availability, validity, strengths, and limitations of various NHP models for future targeted research.
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Affiliation(s)
- Rajeev I Desai
- Department of Psychiatry, Harvard Medical School, Boston, MA, USA.
| | - Brian D Kangas
- Department of Psychiatry, Harvard Medical School, Boston, MA, USA
| | - Charles L Limoli
- Department of Radiation Oncology, University of California, Irvine, CA, USA
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22
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Lacroix E, Edwards MG, De Volder A, Noël MP, Rombaux P, Deggouj N. Neuropsychological profiles of children with vestibular loss. J Vestib Res 2021; 30:25-33. [PMID: 32083606 DOI: 10.3233/ves-200689] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The impact of vestibular loss (VL) on cognition has been previously studied in experimental animal, human and adult patient studies showing links between VL, and cognitive impairments in space orientation, working memory, mental rotation and selective attention. However, few studies have been conducted on children with VL. OBJECTIVE We investigated for the first time, the impact of a VL on children's cognition. METHODS 13 children with VL (10 years, 5 months) and 60 average-age matched controls performed a neuropsychological assessment consisting of visuospatial working memory, selective visual attention, mental rotation and space orientation tasks. RESULTS Children with VL recalled smaller sequences for both forward and backward memory subtasks (mean±SD = 6.3±1.9 and 5.3±2.6) than controls (8.2±2.3 and 7.3±2.0), have less accurate mental rotation scores (25.4±6 versus 30.8±5.1) and greater additional distance travelled in the maze task (96.4±66.6 versus 60.4±66.3); all corrected p-values <0.05. Selective visual attention measures do not show significant differences. CONCLUSIONS Children with VL show similar cognitive difficulties that adults with VL, in tasks involving dynamic cognitive processes (higher attentional load) that in tasks requiring static cognitive processes such as visual attention task.
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Affiliation(s)
- Emilie Lacroix
- Oto-Rhino-Laryngology Department, Cliniques Universitaires Saint-Luc, Brussels, Belgium.,Institute of Neuroscience (IONS), Université Catholique de Louvain, Louvain-la-Neuve, Belgium.,Institute for Research in Psychological Science (IPSY), Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Martin Gareth Edwards
- Institute of Neuroscience (IONS), Université Catholique de Louvain, Louvain-la-Neuve, Belgium.,Institute for Research in Psychological Science (IPSY), Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Anne De Volder
- Institute of Neuroscience (IONS), Université Catholique de Louvain, Louvain-la-Neuve, Belgium.,Institute for Research in Psychological Science (IPSY), Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Marie-Pascale Noël
- Institute for Research in Psychological Science (IPSY), Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Philippe Rombaux
- Oto-Rhino-Laryngology Department, Cliniques Universitaires Saint-Luc, Brussels, Belgium.,Institute for Research in Psychological Science (IPSY), Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Naima Deggouj
- Oto-Rhino-Laryngology Department, Cliniques Universitaires Saint-Luc, Brussels, Belgium.,Institute of Neuroscience (IONS), Université Catholique de Louvain, Louvain-la-Neuve, Belgium.,Institute for Research in Psychological Science (IPSY), Université Catholique de Louvain, Louvain-la-Neuve, Belgium
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23
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Vestibular cues improve landmark-based route navigation: A simulated driving study. Mem Cognit 2021; 49:1633-1644. [PMID: 34018119 DOI: 10.3758/s13421-021-01181-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/19/2021] [Indexed: 11/08/2022]
Abstract
It is well established that humans use self-motion and landmark cues to successfully navigate their environment. Existing research has demonstrated a critical role of the vestibular system in supporting navigation across many species. However, less is known about how vestibular cues interact with landmarks to promote successful navigation in humans. In the present study, we used a motion simulator to manipulate the presence or absence of vestibular cues during a virtual navigation task. Participants learned routes to a target destination in three different landmark blocks in a virtual town: one with proximal landmarks, one with distal landmarks, and one with no landmarks present. Afterwards, they were tested on their ability to retrace the route and find the target destination. We observed a significant interaction between vestibular cues and proximal landmarks, demonstrating that the potential for vestibular cues to improve route navigation is dependent on landmarks that are present in the environment. In particular, vestibular cues significantly improved route navigation when proximal landmarks were present, but this was not significant when distal landmarks or no landmarks were present. Overall, our results indicate that landmarks play an important role in the successful incorporation of vestibular cues to human spatial navigation.
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24
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The Visuo-Spatial Abilities Diagnosis (VSAD) test: Evaluating the potential cognitive difficulties of children with vestibular impairment through a new tablet-based computerized test battery. Behav Res Methods 2021; 53:1910-1922. [PMID: 33674990 DOI: 10.3758/s13428-020-01432-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Recent data collected on adult patients with vestibular loss (VL) tend to demonstrate possible cognitive impairments in visuospatial working memory, mental rotation, selective attention, and space orientation. However, the neuropsychological profile of children with VL remains largely under-investigated in the scientific literature. Although previous research has shown that children with VL may experience some degree of delayed motor development, it is not yet clear if VL could also lead to specific delayed cognitive development. In this study, we will present the development and validation of a new tablet-based computerized test battery (VSAD) that evaluates visuospatial working memory, mental rotation, selective attention, and space orientation abilities. Thirteen children with VL and 54 average-age matched healthy children performed the VSAD and classical paper-and-pencil neuropsychological tasks twice within a 1-month interval. Our results demonstrated a good concurrent validity with strong correlations between the visuospatial working memory, mental rotation, and space orientation tests of the VSAD and classical tasks. Test-retest reliability was also supported through good intra-class coefficients. However, the test of selective attention showed no concurrent validity with the matched classical task. The discriminant validity of the VSAD was partially supported for visuospatial working memory and mental rotation performance accuracy. The VSAD shows good concurrent validity and reliability for measuring visuospatial working memory, mental rotation, and space orientation in children with VL. Future studies are needed to extend discriminant validity with other populations.
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Schöberl F, Pradhan C, Grosch M, Brendel M, Jostes F, Obermaier K, Sowa C, Jahn K, Bartenstein P, Brandt T, Dieterich M, Zwergal A. Bilateral vestibulopathy causes selective deficits in recombining novel routes in real space. Sci Rep 2021; 11:2695. [PMID: 33514827 PMCID: PMC7846808 DOI: 10.1038/s41598-021-82427-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 01/20/2021] [Indexed: 11/28/2022] Open
Abstract
The differential impact of complete and incomplete bilateral vestibulopathy (BVP) on spatial orientation, visual exploration, and navigation-induced brain network activations is still under debate. In this study, 14 BVP patients (6 complete, 8 incomplete) and 14 age-matched healthy controls performed a navigation task requiring them to retrace familiar routes and recombine novel routes to find five items in real space. [18F]-fluorodeoxyglucose-PET was used to determine navigation-induced brain activations. Participants wore a gaze-controlled, head-fixed camera that recorded their visual exploration behaviour. Patients performed worse, when recombining novel routes (p < 0.001), whereas retracing of familiar routes was normal (p = 0.82). These deficits correlated with the severity of BVP. Patients exhibited higher gait fluctuations, spent less time at crossroads, and used a possible shortcut less often (p < 0.05). The right hippocampus and entorhinal cortex were less active and the bilateral parahippocampal place area more active during navigation in patients. Complete BVP showed reduced activations in the pontine brainstem, anterior thalamus, posterior insular, and retrosplenial cortex compared to incomplete BVP. The navigation-induced brain activation pattern in BVP is compatible with deficits in creating a mental representation of a novel environment. Residual vestibular function allows recruitment of brain areas involved in head direction signalling to support navigation.
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Affiliation(s)
- Florian Schöberl
- Department of Neurology, University Hospital, LMU Munich, Munich, Germany.,German Center for Vertigo and Balance Disorders, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany
| | - Cauchy Pradhan
- German Center for Vertigo and Balance Disorders, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany
| | - Maximilian Grosch
- German Center for Vertigo and Balance Disorders, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany
| | - Matthias Brendel
- Department of Nuclear Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Florian Jostes
- Department of Neurology, University Hospital, LMU Munich, Munich, Germany
| | - Katrin Obermaier
- Department of Neurology, University Hospital, LMU Munich, Munich, Germany
| | - Chantal Sowa
- Department of Neurology, University Hospital, LMU Munich, Munich, Germany
| | - Klaus Jahn
- German Center for Vertigo and Balance Disorders, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany.,Neurological Hospital, Schön Klinik Bad Aibling, Bad Aibling, Germany
| | - Peter Bartenstein
- Department of Nuclear Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Thomas Brandt
- German Center for Vertigo and Balance Disorders, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany.,Clinical Neurosciences, University Hospital, LMU Munich, Munich, Germany
| | - Marianne Dieterich
- Department of Neurology, University Hospital, LMU Munich, Munich, Germany.,German Center for Vertigo and Balance Disorders, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany.,Munich Cluster of Systems Neurology, SyNergy, Munich, Germany
| | - Andreas Zwergal
- Department of Neurology, University Hospital, LMU Munich, Munich, Germany. .,German Center for Vertigo and Balance Disorders, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany.
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Hitier M, Zhang YF, Sato G, Besnard S, Zheng Y, Smith PF. Stratification of hippocampal electrophysiological activation evoked by selective electrical stimulation of different angular and linear acceleration sensors in the rat peripheral vestibular system. Hear Res 2021; 403:108173. [PMID: 33465547 DOI: 10.1016/j.heares.2021.108173] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 12/28/2020] [Accepted: 01/05/2021] [Indexed: 01/11/2023]
Abstract
It has become well established that vestibular information is important for hippocampal function and spatial memory. However, as yet, relatively little is known about how different kinds of vestibular information are 'represented' in different parts of the hippocampus. This study used selective electrical stimulation of each of the 5 vestibular sensors (the horizontal (HC), anterior (AC) and posterior (PC) semi-circular canals, and the utricle and saccule) in the rat and recorded local field potentials (LFPs) across the hippocampus, using a 16 electrode microarray. We found that stimulation of any vestibular sensor in the left labyrinth evoked triphasic LFPs in both hippocampi, although it was clear that, in general, the amplitudes were greater for the right, contralateral side. This was particularly true for Phase 1 for the HC, AC, utricle and saccule, Phase 2 for the HC, PC, utricle and saccule, and Phase 3 for the AC, PC and saccule. Overall, our results suggest that vestibular input to the hippocampus is bilateral, preferentially contralateral, but highly stratified in that stimulation of the same vestibular sensor results in activation of different specific areas of the hippocampus, with different LFP amplitudes and latencies. This suggests the possibility that different regions of the hippocampus use different kinds of vestibular information for different purposes and that there may be a high degree of redundancy in the representation of vestibular input, perhaps ensuring that the hippocampus is more robust to the partial loss of vestibular information.
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Affiliation(s)
- Martin Hitier
- Department of Otolaryngology Head and Neck Surgery, CHU de Caen, France; Dept. Anatomy, UNICAEN, Normadie University, 14032 Caen, France; INSERM, U1075, COMETE, 1400, Caen, France; Dept. of Pharmacology and Toxicology, School of Biomedical Sciences and Brain Health Research Centre, University of Otago, Dunedin, New Zealand
| | - Yan-Feng Zhang
- Dept. of Pharmacology and Toxicology, School of Biomedical Sciences and Brain Health Research Centre, University of Otago, Dunedin, New Zealand; Dept. Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK
| | - Go Sato
- Dept. of Pharmacology and Toxicology, School of Biomedical Sciences and Brain Health Research Centre, University of Otago, Dunedin, New Zealand; Department of Otolaryngology, University of Tokushima School of Medicine, Tokushima, Japan
| | | | - Yiwen Zheng
- Dept. of Pharmacology and Toxicology, School of Biomedical Sciences and Brain Health Research Centre, University of Otago, Dunedin, New Zealand; Brain Research New Zealand Centre of Research Excellence, New Zealand; Eisdell Moore Centre for Hearing and Balance Research, University of Auckland, New Zealand
| | - Paul F Smith
- Dept. of Pharmacology and Toxicology, School of Biomedical Sciences and Brain Health Research Centre, University of Otago, Dunedin, New Zealand; Brain Research New Zealand Centre of Research Excellence, New Zealand; Eisdell Moore Centre for Hearing and Balance Research, University of Auckland, New Zealand.
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Nakamagoe K, Yamada S, Kawakami R, Maeno T, Koganezawa T, Tamaoka A. Clinical Application of the Vestibular Stimulation Effect on Balance Disorders with Dementia. Curr Alzheimer Res 2021; 18:1-7. [PMID: 33761856 DOI: 10.2174/1567205018666210324105642] [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: 04/28/2020] [Revised: 10/12/2020] [Accepted: 02/16/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND In a previous study on Alzheimer's disease (AD), we showed that vestibular dysfunction derived from cerebral disorders contributes to balance disorders. No previous clinical study has attempted to prevent the progression of balance disorders in dementia patients through vestibular stimulation using an air caloric device. OBJECTIVE The purpose of this pilot study was to delay the progression of balance disorders by inducing vestibular compensation, specifically by utilizing the effect of vestibular stimulation to activate the cerebrum. METHODS Fifteen individuals were randomized and classified into a stimulation group or a nonstimulation group. Eight AD patients underwent vestibular stimulation every 2 weeks for 6 months in the stimulation group. Seven AD patients participated in the nonstimulation group (the control group). Both groups were subsequently evaluated using a Mini-Mental State Examination (MMSE), stepping test, caloric test, and smooth pursuit eye movement test just before starting the study and 6 months later. RESULTS For balance parameters, the various tests did not show any significant differences between the two groups. However, in the stepping test, the decline rate tended to be higher in the nonstimulation group than in the stimulation group. The stimulation group's rate of decline in MMSE scores was lower than that of the nonstimulation group (p=0.015). No adverse events were tracked during the present study. CONCLUSION Repeated vestibular stimulation might help patients retain greater balance and higher function. To prove these effects, the future clinical application will require an increased number of cases and longer periods of vestibular stimulation. This study showed that vestibular stimulation by air caloric device is safe and tolerable in patients with AD.
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Affiliation(s)
- Kiyotaka Nakamagoe
- Department of Neurology, Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki,Japan
| | - Shiori Yamada
- Department of Neurology, Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki,Japan
| | - Rio Kawakami
- Department of Neurology, Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki,Japan
| | - Takami Maeno
- Department of Primary Care and Medical Education, Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki,Japan
| | - Tadachika Koganezawa
- Department of Physiology, Division of Biomedical Science, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki,Japan
| | - Akira Tamaoka
- Department of Neurology, Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki,Japan
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Smith PF, Truchet B, Chaillan FA, Zheng Y, Besnard S. Vestibular Modulation of Long-Term Potentiation and NMDA Receptor Expression in the Hippocampus. Front Mol Neurosci 2020; 13:140. [PMID: 32848601 PMCID: PMC7431471 DOI: 10.3389/fnmol.2020.00140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 07/09/2020] [Indexed: 01/01/2023] Open
Abstract
Loss of vestibular function is known to cause spatial memory deficits and hippocampal dysfunction, in terms of impaired place cell firing and abnormal theta rhythm. Based on these results, it has been of interest to determine whether vestibular loss also affects the development and maintenance of long-term potentiation (LTP) in the hippocampus. This article summarizes and critically reviews the studies of hippocampal LTP following a vestibular loss and its relationship to NMDA receptor expression, that have been published to date. Although the available in vitro studies indicate that unilateral vestibular loss (UVL) results in reduced hippocampal field potentials in CA1 and the dentate gyrus (DG), the in vivo studies involving bilateral vestibular loss (BVL) do not. This may be due to the differences between UVL and BVL or it could be a result of in vitro/in vivo differences. One in vitro study reported a decrease in LTP in hippocampal slices following UVL; however, the two available in vivo studies have reported different results: either no effect or an increase in EPSP/Population Spike (ES) potentiation. This discrepancy may be due to the different high-frequency stimulation (HFS) paradigms used to induce LTP. The increased ES potentiation following BVL may be related to an increase in synaptic NMDA receptors, possibly increasing the flow of vestibular input coming into CA1, with a loss of selectivity. This might cause increased excitability and synaptic noise, which might lead to a degradation of spatial learning and memory.
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Affiliation(s)
- Paul F. Smith
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, Brain Health Research Centre, University of Otago, Dunedin, New Zealand
- Brain Research New Zealand, The Eisdell Moore Centre for Hearing and Balance Research, University of Auckland, Auckland, >New Zealand
| | - Bruno Truchet
- Aix Marseille University, CNRS, LNC UMR 7291, FR 3C FR 3512, Marseille, France
| | - Franck A. Chaillan
- Aix Marseille University, CNRS, LNC UMR 7291, FR 3C FR 3512, Marseille, France
| | - Yiwen Zheng
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, Brain Health Research Centre, University of Otago, Dunedin, New Zealand
- Brain Research New Zealand, The Eisdell Moore Centre for Hearing and Balance Research, University of Auckland, Auckland, >New Zealand
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Martin T, Bonargent T, Besnard S, Quarck G, Mauvieux B, Pigeon E, Denise P, Davenne D. Vestibular stimulation by 2G hypergravity modifies resynchronization in temperature rhythm in rats. Sci Rep 2020; 10:9216. [PMID: 32514078 PMCID: PMC7280278 DOI: 10.1038/s41598-020-65496-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Accepted: 04/21/2020] [Indexed: 11/09/2022] Open
Abstract
Input from the light/dark (LD) cycle constitutes the primary synchronizing stimulus for the suprachiasmatic nucleus (SCN) circadian clock. However, the SCN can also be synchronized by non-photic inputs. Here, we hypothesized that the vestibular system, which detects head motion and orientation relative to gravity, may provide sensory inputs to synchronize circadian rhythmicity. We investigated the resynchronization of core temperature (Tc) circadian rhythm to a six-hour phase advance of the LD cycle (LD + 6) using hypergravity (2 G) as a vestibular stimulation in control and bilateral vestibular loss (BVL) rats. Three conditions were tested: an LD + 6 exposure alone, a series of seven 2 G pulses without LD + 6, and a series of seven one-hour 2 G pulses (once a day) following LD + 6. First, following LD + 6, sham rats exposed to 2 G pulses resynchronized earlier than BVL rats (p = 0.01), and earlier than sham rats exposed to LD + 6 alone (p = 0.002). Each 2 G pulse caused an acute drop of Tc in sham rats (-2.8 ± 0.3 °C; p < 0.001), while BVL rats remained unaffected. This confirms that the vestibular system influences chronobiological regulation and supports the hypothesis that vestibular input, like physical activity, should be considered as a potent time cue for biological rhythm synchronization, acting in synergy with the visual system.
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Affiliation(s)
- Tristan Martin
- UMR-S 1075 COMETE: MOBILITES "Vieillissement, Pathologies, Santé", INSERM-Normandy University, Caen, France
| | | | - Stéphane Besnard
- UMR-S 1075 COMETE: MOBILITES "Vieillissement, Pathologies, Santé", INSERM-Normandy University, Caen, France
| | - Gaëlle Quarck
- UMR-S 1075 COMETE: MOBILITES "Vieillissement, Pathologies, Santé", INSERM-Normandy University, Caen, France
| | - Benoit Mauvieux
- UMR-S 1075 COMETE: MOBILITES "Vieillissement, Pathologies, Santé", INSERM-Normandy University, Caen, France
| | - Eric Pigeon
- University, UNICAEN, ENSICAEN, LAC, 14000, Caen, France
| | - Pierre Denise
- UMR-S 1075 COMETE: MOBILITES "Vieillissement, Pathologies, Santé", INSERM-Normandy University, Caen, France
| | - Damien Davenne
- UMR-S 1075 COMETE: MOBILITES "Vieillissement, Pathologies, Santé", INSERM-Normandy University, Caen, France.
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Smith PF. The Growing Evidence for the Importance of the Otoliths in Spatial Memory. Front Neural Circuits 2019; 13:66. [PMID: 31680880 PMCID: PMC6813194 DOI: 10.3389/fncir.2019.00066] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 09/30/2019] [Indexed: 01/14/2023] Open
Abstract
Many studies have demonstrated that vestibular sensory input is important for spatial learning and memory. However, it has been unclear what contributions the different parts of the vestibular system - the semi-circular canals and otoliths - make to these processes. The advent of mutant otolith-deficient mice has made it possible to isolate the relative contributions of the otoliths, the utricle and saccule. A number of studies have now indicated that the loss of otolithic function impairs normal spatial memory and also impairs the normal function of head direction cells in the thalamus and place cells in the hippocampus. Epidemiological studies have also provided evidence that spatial memory impairment with aging, may be linked to saccular function. The otoliths may be important in spatial cognition because of their evolutionary age as a sensory detector of orientation and the fact that velocity storage is important to the way that the brain encodes its place in space.
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Affiliation(s)
- Paul F. Smith
- Department of Pharmacology and Toxicology, Brain Health Research Centre, School of Biomedical Sciences, University of Otago Medical School, Dunedin, New Zealand
- Brain Research New Zealand, Auckland, New Zealand
- Eisdell Moore Centre for Hearing and Balance Research, University of Auckland, Auckland, New Zealand
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Vestibular rehabilitation in older adults with and without mild cognitive impairment: Effects of virtual reality using a head-mounted display. Arch Gerontol Geriatr 2019; 83:246-256. [DOI: 10.1016/j.archger.2019.05.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 04/23/2019] [Accepted: 05/09/2019] [Indexed: 11/21/2022]
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Hilber P, Cendelin J, Le Gall A, Machado ML, Tuma J, Besnard S. Cooperation of the vestibular and cerebellar networks in anxiety disorders and depression. Prog Neuropsychopharmacol Biol Psychiatry 2019; 89:310-321. [PMID: 30292730 DOI: 10.1016/j.pnpbp.2018.10.004] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 09/25/2018] [Accepted: 10/04/2018] [Indexed: 12/28/2022]
Abstract
The discipline of affective neuroscience is concerned with the neural bases of emotion and mood. The past decades have witnessed an explosion of research in affective neuroscience, increasing our knowledge of the brain areas involved in fear and anxiety. Besides the brain areas that are classically associated with emotional reactivity, accumulating evidence indicates that both the vestibular and cerebellar systems are involved not only in motor coordination but also influence both cognition and emotional regulation in humans and animal models. The cerebellar and the vestibular systems show the reciprocal connection with a myriad of anxiety and fear brain areas. Perception anticipation and action are also major centers of interest in cognitive neurosciences. The cerebellum is crucial for the development of an internal model of action and the vestibular system is relevant for perception, gravity-related balance, navigation and motor decision-making. Furthermore, there are close relationships between these two systems. With regard to the cooperation between the vestibular and cerebellar systems for the elaboration and the coordination of emotional cognitive and visceral responses, we propose that altering the function of one of the systems could provoke internal model disturbances and, as a result, anxiety disorders followed potentially with depressive states.
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Affiliation(s)
- Pascal Hilber
- Centre de Recherche sur les Fonctionnements et Dysfonctionnements Psychologigues, CRFDP EA 7475, Rouen Normandie University, Bat Blondel, Place E. Blondel 76821, Mont Saint Aignan cedex, France.
| | - Jan Cendelin
- Department of Pathophysiology, Faculty of Medicine in Pilsen, Charles University, alej Svobody 1655/76, 323 00 Plzen, Czech Republic; Laboratory of Neurodegenerative Disorders, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, alej Svobody 1655/76, 323 00 Plzen, Czech Republic
| | - Anne Le Gall
- UMR UCBN/INSERM U 1075 COMETE, Pole des Formations et de Recherche en Sante, Normandie University, 2 Rue Rochambelles, 14032 Caen, cedex 5, France
| | - Marie-Laure Machado
- UMR UCBN/INSERM U 1075 COMETE, Pole des Formations et de Recherche en Sante, Normandie University, 2 Rue Rochambelles, 14032 Caen, cedex 5, France
| | - Jan Tuma
- Department of Pathophysiology, Faculty of Medicine in Pilsen, Charles University, alej Svobody 1655/76, 323 00 Plzen, Czech Republic; Laboratory of Neurodegenerative Disorders, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, alej Svobody 1655/76, 323 00 Plzen, Czech Republic
| | - Stephane Besnard
- UMR UCBN/INSERM U 1075 COMETE, Pole des Formations et de Recherche en Sante, Normandie University, 2 Rue Rochambelles, 14032 Caen, cedex 5, France
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The balance of sleep: Role of the vestibular sensory system. Sleep Med Rev 2018; 42:220-228. [DOI: 10.1016/j.smrv.2018.09.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 09/03/2018] [Accepted: 09/04/2018] [Indexed: 12/14/2022]
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Hippocampal LTP modulation and glutamatergic receptors following vestibular loss. Brain Struct Funct 2018; 224:699-711. [PMID: 30470894 DOI: 10.1007/s00429-018-1792-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Accepted: 11/08/2018] [Indexed: 12/31/2022]
Abstract
Vestibular dysfunction strongly impairs hippocampus-dependent spatial memory performance and place cell function. However, the hippocampal encoding of vestibular information at the synaptic level, remains sparsely explored and controversial. We investigated changes in in vivo long-term potentiation (LTP) and NMDA glutamate receptor (NMDAr) density and distribution after bilateral vestibular lesions (BVL) in adult rats. At day 30 (D30) post-BVL, the LTP of the population spike recorded in the dentate gyrus (DG) was higher in BVL rats, for the entire 3 h of LTP recording, while no difference was observed in the fEPSP slope. However, there was an increase in EPSP-spike (E-S) potentiation in lesioned rats. NMDArs were upregulated at D7 and D30 predominantly within the DG and CA1. At D30, we observed a higher NMDAr density in the left hippocampus. NMDArs were overexpressed on both neurons and non-neuronal cells, suggesting a decrease of the entorhinal glutamatergic inputs to the hippocampus following BVL. The EPSP-spike (E-S) potentiation increase was consistent with the dorsal hippocampus NMDAr upregulation. Such an increase could reflect a non-specific enhancement of synaptic efficacy, leading to a disruption of memory encoding, and therefore might underlie the memory deficits previously reported in rats and humans following vestibular loss.
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Micarelli A, Viziano A, Bruno E, Micarelli E, Augimeri I, Alessandrini M. Gradient impact of cognitive decline in unilateral vestibular hypofunction after rehabilitation: preliminary findings. Eur Arch Otorhinolaryngol 2018; 275:2457-2465. [DOI: 10.1007/s00405-018-5109-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 08/27/2018] [Indexed: 11/29/2022]
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Kamil RJ, Jacob A, Ratnanather JT, Resnick SM, Agrawal Y. Vestibular Function and Hippocampal Volume in the Baltimore Longitudinal Study of Aging (BLSA). Otol Neurotol 2018; 39:765-771. [PMID: 29889787 PMCID: PMC5999049 DOI: 10.1097/mao.0000000000001838] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVE This study evaluated whether reduced vestibular function in aging adults is associated with lower hippocampal volume. STUDY DESIGN Cross-sectional study. SETTING Baltimore Longitudinal Study of Aging, a long-running longitudinal cohort study of healthy aging. PATIENTS Eligible participants were aged ≥ 60 years and had both vestibular physiological testing and brain magnetic resonance imaging at the same visit. INTERVENTION Vestibular function testing consisted of the cervical vestibular-evoked myogenic potential (cVEMP) to assess saccular function, ocular VEMP to assess utricular function, and video head-impulse testing to assess the horizontal semicircular canal vestibulo-ocular reflex. MAIN OUTCOME MEASURE Hippocampal volume calculated using diffeomorphometry. RESULTS The study sample included 103 participants (range of 35-90 participants in subanalyses) with mean (±SD) age 77.2 years (±8.71). Multivariate linear models including age, intracranial volume, sex, and race showed that 1 μV amplitude increase of cVEMP was associated with an increase of 319.1 mm (p = 0.003) in mean hippocampal volume. We did not observe a significant relationship between ocular VEMP amplitude or vestibulo-ocular reflex gain and mean hippocampal volume. CONCLUSIONS Lower cVEMP amplitude (i.e., reduced saccular function) was significantly associated with lower mean hippocampal volume. This is in line with previous work demonstrating a link between saccular function and spatial cognition. Hippocampal atrophy may be a mechanism by which vestibular loss contributes to impaired spatial cognition in older adults. Future work using longitudinal data will be needed to evaluate the causal nature of the association between vestibular loss and hippocampal atrophy.
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Affiliation(s)
- Rebecca J. Kamil
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University, Baltimore, MD
| | - Athira Jacob
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD
| | | | - Susan M. Resnick
- Laboratory of Behavioral Neuroscience, National Institute on Aging, Baltimore MD
| | - Yuri Agrawal
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University, Baltimore, MD
- Department of Otolaryngology-Head and Neck Surgery, Division of Otology, Neurotology, and Skull Base Surgery, Johns Hopkins University, Baltimore, MD
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Flow cytometry for receptor analysis from ex-vivo brain tissue in adult rat. J Neurosci Methods 2018; 304:11-23. [DOI: 10.1016/j.jneumeth.2018.04.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 04/05/2018] [Accepted: 04/11/2018] [Indexed: 11/18/2022]
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Benoit A, Besnard S, Guillamin M, Philoxene B, Sola B, Le Gall A, Machado ML, Toulouse J, Hitier M, Smith PF. Differential regulation of NMDA receptor-expressing neurons in the rat hippocampus and striatum following bilateral vestibular loss demonstrated using flow cytometry. Neurosci Lett 2018; 683:43-47. [PMID: 29936267 DOI: 10.1016/j.neulet.2018.06.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 06/18/2018] [Accepted: 06/20/2018] [Indexed: 01/01/2023]
Abstract
There is substantial evidence that loss of vestibular function impairs spatial learning and memory related to hippocampal (HPC) function, as well as increasing evidence that striatal (Str) plasticity is also implicated. Since the N-methyl-d-aspartate (NMDA) subtype of glutamate receptor is considered essential to spatial memory, previous studies have investigated whether the expression of HPC NMDA receptors changes following vestibular loss; however, the results have been contradictory. Here we used a novel flow cytometric method to quantify the number of neurons expressing NMDA receptors in the HPC and Str following bilateral vestibular loss (BVL) in rats. At 7 and 30 days post-op., there was a significant increase in the number of HPC neurons expressing NMDA receptors in the BVL animals, compared to sham controls (P ≤ 0.004 and P ≤ 0.0001, respectively). By contrast, in the Str, at 7 days there was a significant reduction in the number of neurons expressing NMDA receptors in the BVL group (P ≤ 0.05); however, this difference had disappeared by 30 days post-op. These results suggest that BVL causes differential changes in the number of neurons expressing NMDA receptors in the HPC and Str, which may be related to its long-term impairment of spatial memory.
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Affiliation(s)
- Alice Benoit
- Normandie Univ, Inserm, CHU Caen, COMETE U1075, 14000, Caen, France
| | - Stephane Besnard
- Normandie Univ, Inserm, CHU Caen, COMETE U1075, 14000, Caen, France
| | - Maryline Guillamin
- Normandie Univ, Inserm, CHU Caen, COMETE U1075, 14000, Caen, France; University Normandie, IFR ICORE, Caen, 14032, France
| | - Bruno Philoxene
- Normandie Univ, Inserm, CHU Caen, COMETE U1075, 14000, Caen, France
| | | | - Anne Le Gall
- Normandie Univ, Inserm, CHU Caen, COMETE U1075, 14000, Caen, France
| | | | - Joseph Toulouse
- Normandie Univ, Inserm, CHU Caen, COMETE U1075, 14000, Caen, France
| | - Martin Hitier
- Normandie Univ, Inserm, CHU Caen, COMETE U1075, 14000, Caen, France
| | - Paul F Smith
- Dept. of Pharmacology and Toxicology, School of Biomedical Sciences, and the Brain Health Research Centre, University of Otago, Dunedin, New Zealand; Brain Research New Zealand, Centre of Research Excellence, New Zealand; The Eisdell Moore Centre, University of Auckland, New Zealand.
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Behavioral and neurochemical characterization of the mlh mutant mice lacking otoconia. Behav Brain Res 2018; 359:958-966. [PMID: 29913187 DOI: 10.1016/j.bbr.2018.06.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 05/30/2018] [Accepted: 06/14/2018] [Indexed: 01/28/2023]
Abstract
Otoconia are crucial for the correct processing of positional information and orientation. Mice lacking otoconia cannot sense the direction of the gravity vector and cannot swim properly. This study aims to characterize the behavior of mergulhador (mlh), otoconia-deficient mutant mice. Additionally, the central catecholamine levels were evaluated to investigate possible correlations between behaviors and central neurotransmitters. A sequence of behavioral tests was used to evaluate the parameters related to the general activity, sensory nervous system, psychomotor system, and autonomous nervous system, in addition to measuring the acquisition of spatial and declarative memory, anxiety-like behavior, motor coordination, and swimming behavior of the mlh mutant mice. As well, the neurotransmitter levels in the cerebellum, striatum, frontal cortex, and hippocampus were measured. Relative to BALB/c mice, the mutant mlh mice showed 1) reduced locomotor and rearing behavior, increased auricular and touch reflexes, decreased motor coordination and increased micturition; 2) decreased responses in the T-maze and aversive wooden beam tests; 3) increased time of immobility in the tail suspension test; 4) no effects in the elevated plus maze or object recognition test; 5) an inability to swim; and 6) reduced turnover of dopaminergic system in the cerebellum, striatum, and frontal cortex. Thus, in our mlh mutant mice, otoconia deficiency reduced the motor, sensory and spatial learning behaviors likely by impairing balance. We did not rule out the role of the dopaminergic system in all behavioral deficits of the mlh mutant mice.
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Aitken P, Zheng Y, Smith PF. Ethovision™ analysis of open field behaviour in rats following bilateral vestibular loss. J Vestib Res 2018; 27:89-101. [PMID: 29064826 DOI: 10.3233/ves-170612] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Bilateral vestibular loss (BVL) causes a unique behavioural syndrome in rodents, with symptoms such as locomotor hyperactivity and changes in exploratory behaviour. Many of these symptoms appear to be indirect consequences of the loss of vestibular reflex function and are difficult to explain. Although such symptoms have been reported before, there have been few systematic studies of the effects of BVL using automated digital tracking systems in which many behavioural symptoms can be measured simultaneously with high precision. In this study, data were obtained from rats with BVL induced by intratympanic sodium arsanilate injections (n = 7) or sham injections (n = 8) and their behaviour in the open field was measured at 3 days and 23 days post-injection using Ethovision™ tracking software. BVL rats demonstrated reduced thigmotaxis, with more time spent in the central zones. Twenty-three days post-injection, BVL animals showed increased locomotor activity in the open field. The increase in activity was also reflected in the number of transitions between each zone of the field. In addition to increased activity, BVL animals showed increased whole body rotations following lesions. Using linear discriminant analysis (LDA) and random forest classification (RFC), we were able to show that the indirect behavioural effects of BVL, excluding direct measurement of vestibular reflex function, could correctly predict whether animals had received a BVL with a high degree of accuracy at both day 3 and day 23 post-BVL (83% and 100% for LDA, and 100% and 100% for RFC, respectively). RFC has been similarly successful in classifying other hyperactivity syndromes such as attention deficit hyperactivity disorder. These results suggest that BVL results in a unique behavioural signature that can identify vestibular loss in rats even without direct vestibular reflex measurements.
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Affiliation(s)
- Phillip Aitken
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, and the Brain Health Research Centre, University of Otago, Dunedin, New Zealand
| | - Yiwen Zheng
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, and the Brain Health Research Centre, University of Otago, Dunedin, New Zealand.,Brain Research New Zealand Centre of Research Excellence for Hearing and Balance Research, University of Auckland, New Zealand.,The Eisdell Moore Centre for Hearing and Balance Research, University of Auckland, New Zealand
| | - Paul F Smith
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, and the Brain Health Research Centre, University of Otago, Dunedin, New Zealand.,Brain Research New Zealand Centre of Research Excellence for Hearing and Balance Research, University of Auckland, New Zealand.,The Eisdell Moore Centre for Hearing and Balance Research, University of Auckland, New Zealand
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Degree of Functional Impairment Associated With Vestibular Hypofunction Among Older Adults With Cognitive Decline. Otol Neurotol 2018; 39:e392-e400. [DOI: 10.1097/mao.0000000000001746] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Effects of electrical stimulation of the rat vestibular labyrinth on c-Fos expression in the hippocampus. Neurosci Lett 2018; 677:60-64. [DOI: 10.1016/j.neulet.2018.04.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 04/16/2018] [Accepted: 04/21/2018] [Indexed: 11/18/2022]
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Aitken P, Zheng Y, Smith PF. The modulation of hippocampal theta rhythm by the vestibular system. J Neurophysiol 2018; 119:548-562. [DOI: 10.1152/jn.00548.2017] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The vestibular system is a sensory system that has evolved over millions of years to detect acceleration of the head, both rotational and translational, in three dimensions. One of its most important functions is to stabilize gaze during unexpected head movement; however, it is also important in the control of posture and autonomic reflexes. Theta rhythm is a 3- to 12-Hz oscillating EEG signal that is intimately linked to self-motion and is also known to be important in learning and memory. Many studies over the last two decades have shown that selective activation of the vestibular system, using either natural rotational or translational stimulation, or electrical stimulation of the peripheral vestibular system, can induce and modulate theta activity. Furthermore, inactivation of the vestibular system has been shown to significantly reduce theta in freely moving animals, which may be linked to its impairment of place cell function as well as spatial learning and memory. The pathways through which vestibular information modulate theta rhythm remain debatable. However, vestibular responses have been found in the pedunculopontine tegmental nucleus (PPTg) and activation of the vestibular system causes an increase in acetylcholine release into the hippocampus, probably from the medial septum. Therefore, a pathway from the vestibular nucleus complex and/or cerebellum to the PPTg, supramammillary nucleus, posterior hypothalamic nucleus, and septum to the hippocampus is likely. The modulation of theta by the vestibular system may have implications for vestibular effects on cognitive function and the contribution of vestibular impairment to the risk of dementia.
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Affiliation(s)
- Phillip Aitken
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, and Brain Health Research Centre, University of Otago, Dunedin, New Zealand
| | - Yiwen Zheng
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, and Brain Health Research Centre, University of Otago, Dunedin, New Zealand
- Brain Research New Zealand Centre of Research Excellence
- Eisdell Moore Centre for Hearing and Balance Research, University of Auckland, Auckland, New Zealand
| | - Paul F. Smith
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, and Brain Health Research Centre, University of Otago, Dunedin, New Zealand
- Brain Research New Zealand Centre of Research Excellence
- Eisdell Moore Centre for Hearing and Balance Research, University of Auckland, Auckland, New Zealand
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Abstract
PURPOSE OF REVIEW The last year has seen a great deal of new information published relating vestibular dysfunction to cognitive impairment in humans, especially in the elderly. The objective of this review is to summarize and critically evaluate this new evidence in the context of the previous literature. RECENT FINDINGS This review will address the recent epidemiological/survey studies that link vestibular dysfunction with cognitive impairment in the elderly; recent clinical investigations into cognitive impairment in the context of vestibular dysfunction, both in the elderly and in the cases of otic capsule dehiscence and partial bilateral vestibulopathy; recent evidence that vestibular impairment is associated with hippocampal atrophy; and finally recent evidence relating to the hypothesis that vestibular dysfunction could be a risk factor for dementia. SUMMARY The main implication of these recent studies is that vestibular dysfunction, possibly of any type, may result in cognitive impairment, and this could be especially so for the elderly. Such symptoms will need to be considered in the treatment of patients with vestibular disorders.
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Antisense oligonucleotide therapy rescues disruptions in organization of exploratory movements associated with Usher syndrome type 1C in mice. Behav Brain Res 2017; 338:76-87. [PMID: 29037661 DOI: 10.1016/j.bbr.2017.10.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/04/2017] [Accepted: 10/12/2017] [Indexed: 01/13/2023]
Abstract
Usher syndrome, Type 1C (USH1C) is an autosomal recessive inherited disorder in which a mutation in the gene encoding harmonin is associated with multi-sensory deficits (i.e., auditory, vestibular, and visual). USH1C (Usher) mice, engineered with a human USH1C mutation, exhibit these multi-sensory deficits by circling behavior and lack of response to sound. Administration of an antisense oligonucleotide (ASO) therapeutic that corrects expression of the mutated USH1C gene, has been shown to increase harmonin levels, reduce circling behavior, and improve vestibular and auditory function. The current study evaluates the organization of exploratory movements to assess spatial organization in Usher mice and determine the efficacy of ASO therapy in attenuating any such deficits. Usher and heterozygous mice received the therapeutic ASO, ASO-29, or a control, non-specific ASO treatment at postnatal day five. Organization of exploratory movements was assessed under dark and light conditions at two and six-months of age. Disruptions in exploratory movement organization observed in control-treated Usher mice were consistent with impaired use of self-movement and environmental cues. In general, ASO-29 treatment rescued organization of exploratory movements at two and six-month testing points. These observations are consistent with ASO-29 rescuing processing of multiple sources of information and demonstrate the potential of ASO therapies to ameliorate topographical disorientation associated with other genetic disorders.
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Cassel R, Bordiga P, Pericat D, Hautefort C, Tighilet B, Chabbert C. New mouse model for inducing and evaluating unilateral vestibular deafferentation syndrome. J Neurosci Methods 2017; 293:128-135. [PMID: 28911857 DOI: 10.1016/j.jneumeth.2017.09.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 09/06/2017] [Accepted: 09/11/2017] [Indexed: 11/19/2022]
Abstract
BACKGROUND Unilateral vestibular deafferentation syndrome (uVDS) holds a particular place in the vestibular pathology domain. Due to its suddenness, the violence of its symptoms that often result in emergency hospitalization, and its associated original neurophysiological properties, this syndrome is a major source of questioning for the otoneurology community. Also, its putative pathogenic causes remain to be determined. There is currently a strong medical need for the development of targeted and effective countermeasures to improve the therapeutic management of uVDS. NEW METHODS The present study reports the development of a new mouse model for inducing and evaluating uVDS. Both the method for generating controlled excitotoxic-type peripheral vestibular damages, through transtympanic administration of the glutamate receptors agonist kainate (TTK), and the procedure for evaluating the ensuing clinical signs are detailed. COMPARISON WITH EXISTING METHODS Through extensive analysis of the clinical symptoms characteristics, this new animal model provides the opportunity to better follow the temporal evolution of various uVDS specific symptoms, while better appreciating the different phases that composed this syndrome. RESULTS The uVDS evoked in the TTK mouse model displays two main phases distinguishable by their kinetics and amplitudes. Several parameters of the altered vestibular behaviour mimic those observed in the human syndrome. CONCLUSION This new murine model brings concrete information about how uVDS develops and how it affects global behaviour. In addition, it opens new opportunity to decipher the etiopathological substrate of this pathology by authorizing the use of genetically modified mouse models.
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Affiliation(s)
- R Cassel
- Aix Marseille Université, CNRS, UMR 7260, Laboratoire de Neurosciences Intégratives et Adaptatives - Equipe physiopathologie et Thérapie des Désordres Vestibulaires, Marseille, France
| | - P Bordiga
- Aix Marseille Université, CNRS, UMR 7260, Laboratoire de Neurosciences Intégratives et Adaptatives - Equipe physiopathologie et Thérapie des Désordres Vestibulaires, Marseille, France
| | - D Pericat
- Aix Marseille Université, CNRS, UMR 7260, Laboratoire de Neurosciences Intégratives et Adaptatives - Equipe physiopathologie et Thérapie des Désordres Vestibulaires, Marseille, France
| | | | - B Tighilet
- Aix Marseille Université, CNRS, UMR 7260, Laboratoire de Neurosciences Intégratives et Adaptatives - Equipe physiopathologie et Thérapie des Désordres Vestibulaires, Marseille, France
| | - C Chabbert
- Aix Marseille Université, CNRS, UMR 7260, Laboratoire de Neurosciences Intégratives et Adaptatives - Equipe physiopathologie et Thérapie des Désordres Vestibulaires, Marseille, France.
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Abstract
OBJECTIVE Recent studies suggest an association between vestibular and cognitive function. The goal of the study was to investigate whether vestibular function was impaired in individuals with mild cognitive impairment (MCI) and Alzheimer's disease (AD) compared with cognitively normal individuals. STUDY DESIGN Cross-sectional study. SETTING Outpatient memory clinic and longitudinal observational study unit. PATIENTS Older individuals ≥55 years with MCI or AD. Age, sex, and education-matched normal controls were drawn from the Baltimore Longitudinal Study of Aging (BLSA). INTERVENTION Saccular and utricular function was assessed with cervical and ocular vestibular-evoked myogenic potentials (c- and oVEMPs) respectively, and horizontal semicircular canal function was assessed with video head impulse testing. MAIN OUTCOME MEASURES Presence or absence of VEMP responses, VEMP amplitude, and vestibular ocular reflex (VOR) gain were measured. RESULTS Forty-seven individuals with cognitive impairment (MCI N = 15 and AD N = 32) underwent testing and were matched with 94 controls. In adjusted analyses, bilaterally absent cVEMPs were associated with an over three-fold odds of AD (OR 3.42, 95% CI 1.33-8.91, p = 0.011). One microvolt increases in both cVEMP and oVEMP amplitudes were associated with decreased odds of AD (OR 0.28, 95% CI 0.09-0.93, p = 0.038 and OR 0.92, 95% CI 0.85-0.99, p = 0.036, respectively). There was no significant difference in VOR gain between the groups. CONCLUSIONS These findings confirm and extend emerging evidence of an association between vestibular dysfunction and cognitive impairment. Further investigation is needed to determine the causal direction for the link between peripheral vestibular loss and cognitive impairment.
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Lee GW, Kim JH, Kim MS. Reduction of long-term potentiation at Schaffer collateral-CA1 synapses in the rat hippocampus at the acute stage of vestibular compensation. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2017; 21:423-428. [PMID: 28706456 PMCID: PMC5507781 DOI: 10.4196/kjpp.2017.21.4.423] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 05/06/2017] [Accepted: 06/12/2017] [Indexed: 11/15/2022]
Abstract
Vestibular compensation is a recovery process from vestibular symptoms over time after unilateral loss of peripheral vestibular end organs. The aim of the present study was to observe time-dependent changes in long-term potentiation (LTP) at Schaffer collateral-CA1 synapses in the CA1 area of the hippocampus during vestibular compensation. The input-output (I/O) relationships of fEPSP amplitudes and LTP induced by theta burst stimulation to Schaffer's collateral commissural fibers were evaluated from the CA1 area of hippocampal slices at 1 day, 1 week, and 1 month after unilateral labyrinthectomy (UL). The I/O relationships of fEPSPs in the CA1 area was significantly reduced within 1 week post-op and then showed a non-significant reduction at 1 month after UL. Compared with sham-operated animals, there was a significant reduction of LTP induction in the hippocampus at 1 day and 1 week after UL. However, LTP induction levels in the CA1 area of the hippocampus also returned to those of sham-operated animals 1 month following UL. These data suggest that unilateral injury of the peripheral vestibular end organs results in a transient deficit in synaptic plasticity in the CA1 hippocampal area at acute stages of vestibular compensation.
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Affiliation(s)
- Gyoung Wan Lee
- Department of Nursing, Wonkwang Health Science University, Iksan 54538, Korea
| | - Jae Hyo Kim
- Department of Meridian & Acupoint, College of Korean Medicine, Wonkwang University, Iksan 54538, Korea
| | - Min Sun Kim
- Department of Physiology, School of Medicine, Wonkwang University, Iksan 54538, Korea
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Effects of bilateral vestibular deafferentation in rat on hippocampal theta response to somatosensory stimulation, acetylcholine release, and cholinergic neurons in the pedunculopontine tegmental nucleus. Brain Struct Funct 2017; 222:3319-3332. [PMID: 28349227 DOI: 10.1007/s00429-017-1407-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Accepted: 03/14/2017] [Indexed: 12/18/2022]
Abstract
Vestibular dysfunction has been shown to cause spatial memory impairment. Neurophysiological studies indicate that bilateral vestibular loss (BVL), in particular, is associated with an impairment of the response of hippocampal place cells and theta rhythm. However, the specific neural pathways through which vestibular information reaches the hippocampus are yet to be fully elucidated. The aim of the present study was to further investigate the hypothesised 'theta-generating pathway' from the brainstem vestibular nucleus to the hippocampus. BVL, and in some cases, unilateral vestibular loss (UVL), induced by intratympanic sodium arsanilate injections in rats, were used to investigate the effects of vestibular loss on somatosensory-induced type 2 theta rhythm, acetylcholine (ACh) release in the hippocampus, and the number of cholinergic neurons in the pedunculopontine tegmental nucleus (PPTg), an important part of the theta-generating pathway. Under urethane anaesthesia, BVL was found to cause a significant increase in the maximum power of the type 2 theta (3-6 Hz) frequency band compared to UVL and sham animals. Rats with BVL generally exhibited a lower basal level of ACh release than sham rats; however, this difference was not statistically significant. The PPTg of BVL rats exhibited significantly more choline-acetyltransferase (ChAT)-positive neurons than that of sham animals, as did the contralateral PPTg of UVL animals; however, the number of ChAT-positive neurons on the ipsilateral side of UVL animals was not significantly different from sham animals. The results of these studies indicate that parts of the theta-generating pathway undergo a significant reorganisation following vestibular loss, which suggests that this pathway is important for the interaction between the vestibular system and the hippocampus.
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Cognition and higher vestibular disorders: developing tools for assessing vection. J Neurol 2017; 264:45-47. [PMID: 28293724 DOI: 10.1007/s00415-017-8449-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 03/02/2017] [Accepted: 03/03/2017] [Indexed: 10/20/2022]
Abstract
Visually induced vection is the illusory sensation of self-motion caused by visual stimuli (such as a dot cloud) that emulate what is seen when an agent moves through space. The sufficient stimulus parameters to generate vection are unknown, but elucidating this is of interest in the study of higher (cognitive) neurological disorders where the relationship between visual and vestibular processing is disturbed. Here, we selectively eliminate that radial motion angle from vection displays and show that vection is still present, although weaker than during normal optic flow, and that vection strength was strikingly variable across individuals.
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