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Boscato N, Exposto F, Nascimento GG, Svensson P, Costa YM. Is bruxism associated with changes in neural pathways? A systematic review and meta-analysis of clinical studies using neurophysiological techniques. Brain Imaging Behav 2022; 16:2268-2280. [PMID: 35088353 DOI: 10.1007/s11682-021-00601-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/03/2021] [Indexed: 12/23/2022]
Abstract
This study aimed to systematically review the literature to identify clinical studies assessing neuroplasticity changes induced by or associated with bruxism or a tooth-clenching task using neurophysiological techniques. Searches were performed in five electronic databases (PubMed, EMBASE, Scopus, Web of Science, and Google Scholar) in April 2020. This review included clinical studies using neurophysiological techniques to assess neuroplasticity changes in healthy participants before and after a tooth-clenching task or comparing bruxers and non-bruxers. The quality assessment was performed with the Joanna Briggs Institute tool and Grading of Recommendations Assessment, Development, and Evaluation. Meta-analyses were conducted with studies reporting similar comparisons regarding masseter motor evoked potential amplitude and signal change outcomes. Of 151 articles identified in the searches, nine were included, and five proceeded to meta-analysis. Included studies presented moderate to very low methodological quality. From these included studies, eight evaluated bruxers and non-bruxers, of which five of them observed brain activity differences between groups, and three found no differences. Even so, all studies have suggested distinct difference in the central excitability between bruxers and non-bruxers, the meta-analysis revealed no statistically significant differences (P > 0.05). It appears that bruxism seems, indeed, to be associated with distinct differences in the neural pathways related to the control of the jaw-closing muscles, but that considerable variability in terms of classification of bruxism and assessment of neuroplasticity hamper a definite conclusion. Future research projects should take these concerns into consideration in order to further the understanding of bruxism physiology and pathophysiology.
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Affiliation(s)
- Noéli Boscato
- Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas, Gonçalves Chaves Street 457, CEP 96015-560, Pelotas, RS, Brazil. .,Section for Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark.
| | - Fernando Exposto
- Section for Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark.,Scandinavian Center for Orofacial Neurosciences (SCON), Aarhus, Denmark
| | - Gustavo G Nascimento
- Section for Periodontology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Peter Svensson
- Section for Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark.,Scandinavian Center for Orofacial Neurosciences (SCON), Aarhus, Denmark.,Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Yuri M Costa
- Section for Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark.,Department of Biosciences, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
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Kobayashi T, Fukami H, Ishikawa E, Shibata K, Kubota M, Kondo H, Sahara Y. An fMRI Study of the Brain Network Involved in Teeth Tapping in Elderly Adults. Front Aging Neurosci 2020; 12:32. [PMID: 32256334 PMCID: PMC7090023 DOI: 10.3389/fnagi.2020.00032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 02/03/2020] [Indexed: 11/18/2022] Open
Abstract
Cortical activity during jaw movement has been analyzed using various non-invasive brain imaging methods, but the contribution of orofacial sensory input to voluntary jaw movements remains unclear. In this study, we used functional magnetic resonance imaging (fMRI) to observe brain activities during a simple teeth tapping task in adult dentulous (AD), older dentulous (OD), and older edentulous subjects who wore dentures (OEd) or did not wear dentures (OE) to analyze their functional network connections. (1) To assess the effect of age on natural activation patterns during teeth tapping, a comparison of groups with natural dentition—AD and OD—was undertaken. A general linear model analysis indicated that the major activated site in the AD group was the primary sensory cortex (SI) and motor cortex (MI) (p < 0.05, family wise error corrected). In the OD group, teeth tapping induced brain activity at various foci (p < 0.05, family wise error corrected), including the SI, MI, insula cortex, supplementary motor cortex (SMC)/premotor cortex (PMA), cerebellum, thalamus, and basal ganglia in each group. (2) Group comparisons between the OD and OEd subjects showed decreased activity in the SI, MI, Brodmann’s area 6 (BA6), thalamus (ventral posteromedial nucleus, VPM), basal ganglia, and insular cortex (p ¡ 0.005, uncorrected). This suggested that the decreased S1/M1 activity in the OEd group was related to missing teeth, which led to reduced periodontal afferents. (3) A conjunction analysis in the OD and OEd/OE groups revealed that commonly activated areas were the MI, SI, cerebellum, BA6, thalamus (VPM), and basal ganglia (putamen; p < 0.05, FWE corrected). These areas have been associated with voluntary movements. (4) Psychophysiological interaction analysis (OEd vs OE) showed that subcortical and cortical structures, such as the MI, SI, DLPFC, SMC/PMA, insula cortex, basal ganglia, and cerebellum, likely function as hubs and form an integrated network that participates in the control of teeth tapping. These results suggest that oral sensory inputs are involved in the control of teeth tapping through feedforward control of intended movements, as well as feedback control of ongoing movements.
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Affiliation(s)
- T Kobayashi
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Japan
| | - H Fukami
- Department of Physiology, School of Dentistry, Iwate Medical University, Shiwa-gun, Japan.,Department of Oral Health Sciences, Faculty of Nursing and Health Care, Baika Women's University, Osaka, Japan
| | - E Ishikawa
- Department of Physiology, School of Dentistry, Iwate Medical University, Shiwa-gun, Japan
| | - K Shibata
- Department of Physiology, School of Dentistry, Iwate Medical University, Shiwa-gun, Japan
| | - M Kubota
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Japan
| | - H Kondo
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Japan
| | - Y Sahara
- Department of Physiology, School of Dentistry, Iwate Medical University, Shiwa-gun, Japan
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3
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Ikuta M, Iida T, Kothari M, Shimada A, Komiyama O, Svensson P. Impact of sleep bruxism on training-induced cortical plasticity. J Prosthodont Res 2019; 63:277-282. [PMID: 30704929 DOI: 10.1016/j.jpor.2018.12.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 12/13/2018] [Accepted: 12/17/2018] [Indexed: 10/27/2022]
Abstract
PURPOSE To investigate if sleep bruxism (SB) influences training-induced cortical plasticity and performance in terms of accuracy and precision of a tooth-clenching task (TCT). METHODS Thirty-eight participants were allocated into SB group (N=19) and control group (N=19) according to presence of SB based on a 2-week screening. The participants were instructed to perform a standardized TCT for 58min at three different force levels (10%, 20% and 40% of maximum voluntary contraction; MVC) in three series (first and third without visual-feedback and second with visual-feedback). Accuracy and precision of the TCT were calculated from actual bite force values. Transcranial magnetic stimulation was applied to elicit motor evoked potentials (MEPs) from the masseter and first dorsal interosseous muscle (FDI) before the TCT (pre-TCT-session) and 5-min after the TCT (post-TCT-session). RESULTS Accuracy was significantly dependent on the series and target force level (P<0.001), however, there was a significant decrease only in the control group at 10% MVC from first to third session (P<0.001). No significant differences between groups were observed for the precision of the TCT. Masseter MEPs in the SB group in the pre-TCT-session at 120% and 160% motor threshold were significantly lower than in the control group (P<0.05). Masseter MEPs of the control group in the post-TCT-session were significantly higher than the pre-TCT-session (P<0.05) but not SB. FDI MEPs were only dependent on stimulus intensity (P<0.001). CONCLUSIONS SB is associated with significant changes not only in excitability of corticomotor control but also motor learning of jaw movements and force control.
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Affiliation(s)
- Mai Ikuta
- Division of Oral Function and Rehabilitation, Department of Oral Health Science, Nihon University School of Dentistry at Matsudo, Matsudo, Japan; Section of Orofacial Pain and Jaw Function, Aarhus University, Department of Dentistry, Aarhus, Denmark
| | - Takashi Iida
- Division of Oral Function and Rehabilitation, Department of Oral Health Science, Nihon University School of Dentistry at Matsudo, Matsudo, Japan.
| | - Mohit Kothari
- Hammel Neurorehabilitation Centre and University Research Clinic, Hammel, Denmark; Department of Clinic Medicine, Aarhus University, Aarhus, Denmark
| | - Akiko Shimada
- Section of Orofacial Pain and Jaw Function, Aarhus University, Department of Dentistry, Aarhus, Denmark; Osaka Dental University Hospital, Osaka, Japan
| | - Osamu Komiyama
- Division of Oral Function and Rehabilitation, Department of Oral Health Science, Nihon University School of Dentistry at Matsudo, Matsudo, Japan
| | - Peter Svensson
- Section of Orofacial Pain and Jaw Function, Aarhus University, Department of Dentistry, Aarhus, Denmark; Scandinavian Center for Orofacial Neurosciences (SCON), Aarhus, Denmark; Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
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4
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He S, Li F, Gu T, Ma H, Li X, Zou S, Huang X, Lui S, Gong Q, Chen S. Reduced corticostriatal functional connectivity in temporomandibular disorders. Hum Brain Mapp 2018; 39:2563-2572. [PMID: 29504182 PMCID: PMC6866295 DOI: 10.1002/hbm.24023] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2017] [Revised: 12/22/2017] [Accepted: 02/19/2018] [Indexed: 02/05/2023] Open
Abstract
Although temporomandibular disorders (TMD) have been associated with abnormal gray matter volumes in cortical areas and in the striatum, the corticostriatal functional connectivity (FC) of patients with TMD has not been studied. Here, we studied 30 patients with TMD and 20 healthy controls that underwent clinical evaluations, including Helkimo indices, pain assessments, and resting-state functional magnetic resonance imaging scans. The FCs of the striatal regions with the other brain areas were examined with a seed-based approach. As seeds, we used the dorsal caudate, ventral caudate/nucleus accumbens, dorsal caudal putamen, and ventral rostral putamen regions. Voxel-wise comparisons with controls revealed that the patients with TMD exhibited reduced FCs in the ventral corticostriatal circuitry, between the ventral striatum and ventral frontal cortices, including the anterior cingulate cortex and anterior insula; in the dorsal corticostriatal circuitry, between the dorsal striatum and the dorsal cortices, including the precentral gyrus and supramarginal gyrus; and also within the striatum. Additionally, we explored correlations between the reduced corticostriatal FCs and clinical measurements. These results directly supported the hypothesis that TMD is associated with reduced FCs in brain corticostriatal networks and that these reduced FCs may underlie the deficits in motor control, pain processing, and cognition in TMD. Our findings may contribute to the understanding of the etiologies and pathologies of TMD.
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Affiliation(s)
- Shushu He
- State Key Laboratory of Oral Disease, Department of OrthodonticsWest China School of Stomatology, Sichuan UniversityChengduSichuanChina
| | - Fei Li
- Huaxi MR Research Center (HMRRC), Department of RadiologyWest China Hospital of Sichuan UniversityChengduSichuanChina
| | - Tian Gu
- State Key Laboratory of Oral Disease, Department of OrthodonticsWest China School of Stomatology, Sichuan UniversityChengduSichuanChina
| | - Huayu Ma
- State Key Laboratory of Oral Disease, Department of OrthodonticsWest China School of Stomatology, Sichuan UniversityChengduSichuanChina
| | - Xinyi Li
- State Key Laboratory of Oral Disease, Department of OrthodonticsWest China School of Stomatology, Sichuan UniversityChengduSichuanChina
| | - Shujuan Zou
- State Key Laboratory of Oral Disease, Department of OrthodonticsWest China School of Stomatology, Sichuan UniversityChengduSichuanChina
| | - Xiaoqi Huang
- Huaxi MR Research Center (HMRRC), Department of RadiologyWest China Hospital of Sichuan UniversityChengduSichuanChina
| | - Su Lui
- Huaxi MR Research Center (HMRRC), Department of RadiologyWest China Hospital of Sichuan UniversityChengduSichuanChina
| | - Qiyong Gong
- Huaxi MR Research Center (HMRRC), Department of RadiologyWest China Hospital of Sichuan UniversityChengduSichuanChina
| | - Song Chen
- State Key Laboratory of Oral Disease, Department of OrthodonticsWest China School of Stomatology, Sichuan UniversityChengduSichuanChina
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5
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Avivi-Arber L, Sessle BJ. Jaw sensorimotor control in healthy adults and effects of ageing. J Oral Rehabil 2017; 45:50-80. [DOI: 10.1111/joor.12554] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/23/2017] [Indexed: 12/22/2022]
Affiliation(s)
- L. Avivi-Arber
- Faculty of Dentistry; University of Toronto; Toronto ON Canada
| | - B. J. Sessle
- Faculty of Dentistry; University of Toronto; Toronto ON Canada
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6
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Ariji Y, Koyama S, Sakuma S, Nakayama M, Ariji E. Regional brain activity during jaw clenching with natural teeth and with occlusal splints: a preliminary functional MRI study. Cranio 2016; 34:188-94. [DOI: 10.1179/2151090315y.0000000017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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7
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He SS, Li F, Gu T, Liu Y, Zou SJ, Huang XQ, Lui S, Gong QY, Chen S. Altered neural activation pattern during teeth clenching in temporomandibular disorders. Oral Dis 2016; 22:406-14. [PMID: 26913995 DOI: 10.1111/odi.12465] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 01/28/2016] [Accepted: 02/11/2016] [Indexed: 02/05/2023]
Affiliation(s)
- SS He
- Department of Orthodontics; State Key Laboratory of Oral Disease; West China School of Stomatology; Sichuan University; Chengdu Sichuan China
| | - F Li
- Department of Radiology; Huaxi MR Research Center (HMRRC); West China Hospital of Sichuan University; Chengdu Sichuan China
| | - T Gu
- Department of Orthodontics; State Key Laboratory of Oral Disease; West China School of Stomatology; Sichuan University; Chengdu Sichuan China
| | - Y Liu
- Department of Orthodontics; State Key Laboratory of Oral Disease; West China School of Stomatology; Sichuan University; Chengdu Sichuan China
| | - SJ Zou
- Department of Orthodontics; State Key Laboratory of Oral Disease; West China School of Stomatology; Sichuan University; Chengdu Sichuan China
| | - XQ Huang
- Department of Radiology; Huaxi MR Research Center (HMRRC); West China Hospital of Sichuan University; Chengdu Sichuan China
| | - S Lui
- Department of Radiology; Huaxi MR Research Center (HMRRC); West China Hospital of Sichuan University; Chengdu Sichuan China
| | - QY Gong
- Department of Radiology; Huaxi MR Research Center (HMRRC); West China Hospital of Sichuan University; Chengdu Sichuan China
| | - S Chen
- Department of Orthodontics; State Key Laboratory of Oral Disease; West China School of Stomatology; Sichuan University; Chengdu Sichuan China
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8
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Kent RD. Nonspeech Oral Movements and Oral Motor Disorders: A Narrative Review. AMERICAN JOURNAL OF SPEECH-LANGUAGE PATHOLOGY 2015; 24:763-89. [PMID: 26126128 PMCID: PMC4698470 DOI: 10.1044/2015_ajslp-14-0179] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 04/02/2015] [Accepted: 06/13/2015] [Indexed: 05/25/2023]
Abstract
PURPOSE Speech and other oral functions such as swallowing have been compared and contrasted with oral behaviors variously labeled quasispeech, paraspeech, speechlike, and nonspeech, all of which overlap to some degree in neural control, muscles deployed, and movements performed. Efforts to understand the relationships among these behaviors are hindered by the lack of explicit and widely accepted definitions. This review article offers definitions and taxonomies for nonspeech oral movements and for diverse speaking tasks, both overt and covert. METHOD Review of the literature included searches of Medline, Google Scholar, HighWire Press, and various online sources. Search terms pertained to speech, quasispeech, paraspeech, speechlike, and nonspeech oral movements. Searches also were carried out for associated terms in oral biology, craniofacial physiology, and motor control. RESULTS AND CONCLUSIONS Nonspeech movements have a broad spectrum of clinical applications, including developmental speech and language disorders, motor speech disorders, feeding and swallowing difficulties, obstructive sleep apnea syndrome, trismus, and tardive stereotypies. The role and benefit of nonspeech oral movements are controversial in many oral motor disorders. It is argued that the clinical value of these movements can be elucidated through careful definitions and task descriptions such as those proposed in this review article.
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Affiliation(s)
- Ray D. Kent
- Waisman Center, University of Wisconsin–Madison
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9
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GABA and glutamate levels in occlusal splint-wearing males with possible bruxism. Arch Oral Biol 2015; 60:1021-9. [PMID: 25889171 DOI: 10.1016/j.archoralbio.2015.03.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 03/13/2015] [Accepted: 03/14/2015] [Indexed: 01/04/2023]
Abstract
OBJECTIVE The inhibitory neurotransmitter γ-aminobutyric acid (GABA) plays an important role in the pathophysiology of anxiety behavioural disorders such as panic disorder and post-traumatic stress disorder and is also implicated in the manifestation of tooth-grinding and clenching behaviours generally known as bruxism. In order to test whether the stress-related behaviours of tooth-grinding and clenching share similar underlying mechanisms involving GABA and other metabolites as do anxiety-related behavioural disorders, we performed a Magnetic Resonance Spectroscopy (MRS) study for accurate, in vivo metabolite quantification in anxiety-related brain regions. DESIGN MRS was performed in the right hippocampus and right thalamus involved in the hypothalamic-pituitary-adrenal axis system, together with a motor planning region (dorsal anterior cingulate cortex/pre-supplementary motor area) and right dorsolateral prefrontal cortex (DLPFC). Eight occlusal splint-wearing men (OCS) with possible tooth-grinding and clenching behaviours and nine male controls (CON) with no such behaviour were studied. RESULTS Repeated-measures ANOVA showed significant Group×Region interaction for GABA+ (p = 0.001) and glutamate (Glu) (p = 0.031). Between-group post hoc ANOVA showed significantly lower levels of GABA+ (p = 0.003) and higher levels of Glu (p = 0.002) in DLPFC of OCS subjects. These GABA+ and Glu group differences remained significant (GABA+, p = 0.049; Glu, p = 0.039) after the inclusion of anxiety as a covariate. Additionally, GABA and Glu levels in the DLPFC of all subjects were negatively related (Pearson's r = -0.75, p = 0.003). CONCLUSIONS These findings indicate that the oral behaviours of tooth-grinding and clenching, generally known as bruxism, may be associated with disturbances in brain GABAergic and glutamatergic systems.
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Abstract
OBJECTIVE Since the pathophysiology of bruxism is not clearly understood, there exists no possible treatment. The aim of this study is to investigate the cerebral activation differences between healthy subjects and patients with bruxism on behalf of possible aetiological factors. METHODS 12 healthy subjects and 12 patients with bruxism, a total of 24 right-handed female subjects (aged 20-27 years) were examined using functional MRI during tooth-clenching and resting tasks. Imaging was performed with 3.0-T MRI scanner with a 32-channel head coil. Differences in regional brain activity between patients with bruxism and healthy subjects (control group) were observed with BrainVoyager QX 2.8 (Brain Innovation, Maastricht, Netherlands) statistical data analysis program. Activation maps were created using the general linear model: single study and multistudy multisubject for statistical group analysis. This protocol was approved by the ethics committee of medical faculty of Kirikkale University, Turkey (02/04), based on the guidelines set forth in the Declaration of Helsinki. RESULTS The group analysis revealed a statistically significant increase in blood oxygenation level-dependent signal of three clusters in the control group (p<0.005), which may indicate brain regions related with somatognosis, repetitive passive motion, proprioception and tactile perception. These areas coincide with Brodmann areas 7, 31, 39 and 40. It is conceivable that there are differences between healthy subjects and patients with bruxism. CONCLUSIONS Our findings indicate that there was a decrease of cortical activation pattern in patients with bruxism in clenching tasks. This indicates decreased blood flow and activation in regional neuronal activity. Bruxism, as an oral motor disorder concerns dentistry, neurology and psychiatry. These results might improve the understanding and physiological handling of sleep bruxism.
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Affiliation(s)
- S Yılmaz
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Kirikkale University, Kirikkale, Turkey
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11
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Oda M, Yoshino K, Tanaka T, Shiiba S, Makihara E, Miyamoto I, Nogami S, Kito S, Wakasugi-Sato N, Matsumoto-Takeda S, Nishimura S, Murakami K, Koga M, Kawagishi S, Yoshioka I, Masumi SI, Kimura M, Morimoto Y. Identification and adjustment of experimental occlusal interference using functional magnetic resonance imaging. BMC Oral Health 2014; 14:124. [PMID: 25304016 PMCID: PMC4200220 DOI: 10.1186/1472-6831-14-124] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 10/01/2014] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND The purpose of this study was to use functional magnetic resonance imaging (fMRI) to quantify changes in brain activity during experimental occlusal interference. METHODS Fourteen healthy volunteers performed a rhythmical tapping occlusion task with experimental occlusal interference of the right molar tooth at 0 mm (no occlusion), 0.5 mm, and 0.75 mm. The blood-oxygen-level dependent (BOLD) signal was quantified using statistical parametric mapping and compared between rest periods and task periods. RESULTS In tapping tasks with experimental occlusal interference of 0.75 mm or 0.5 mm, there was clear activation of the contralateral teeth-related primary sensory cortex and Brodmann's area 46. At 0 and 30 minutes after removal of the experimental occlusal interference, the activation clearly appeared in the bilateral teeth-related primary sensory cortices and Brodmann's area 46. At 60 minutes after the removal of the experimental occlusal interference, the activation of Brodmann's area 46 had disappeared, and only the bilateral teeth-related primary sensory cortices were active. CONCLUSIONS The present results suggest that adjustments for experimental occlusal interference can be objectively evaluated using fMRI. We expect that this method of evaluating adjustments in occlusal interference, combined with fMRI and the tapping task, could be applied clinically in the future.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Yasuhiro Morimoto
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan.
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12
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Iida T, Overgaard A, Komiyama O, Weibull A, Baad-Hansen L, Kawara M, Sundgren PC, List T, Svensson P. Analysis of brain and muscle activity during low-level tooth clenching - a feasibility study with a novel biting device. J Oral Rehabil 2014; 41:93-100. [DOI: 10.1111/joor.12128] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/05/2013] [Indexed: 11/29/2022]
Affiliation(s)
- T. Iida
- Department of Oral Function and Rehabilitation; Nihon University School of Dentistry at Matsudo; Matsudo Japan
- Section of Clinical Oral Physiology; Department of Dentistry; Aarhus University; Aarhus Denmark
| | - A. Overgaard
- Department of Radiology/DC; Skane University Hospital; Malmö Sweden
- Department of Radiology/DC; Lund University; Lund Sweden
| | - O. Komiyama
- Department of Oral Function and Rehabilitation; Nihon University School of Dentistry at Matsudo; Matsudo Japan
| | - A. Weibull
- Department of Radiology/DC; Skane University Hospital; Malmö Sweden
- Department of Radiology/DC; Lund University; Lund Sweden
| | - L. Baad-Hansen
- Section of Clinical Oral Physiology; Department of Dentistry; Aarhus University; Aarhus Denmark
| | - M. Kawara
- Department of Oral Function and Rehabilitation; Nihon University School of Dentistry at Matsudo; Matsudo Japan
| | - P. C. Sundgren
- Department of Diagnostic Radiology; Clinical Sciences Lund; Lund University; Lund Sweden
| | - T. List
- Department of Orofacial Pain and Jaw Function; Faculty of Odontology; Malmö University; Malmö Sweden
| | - P. Svensson
- Section of Clinical Oral Physiology; Department of Dentistry; Aarhus University; Aarhus Denmark
- Mind Lab; Center for Functionally Integrative Neuroscience; Aarhus University Hospital; Aarhus Denmark
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13
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Iida T, Komiyama O, Obara R, Baad-Hansen L, Kawara M, Svensson P. Repeated clenching causes plasticity in corticomotor control of jaw muscles. Eur J Oral Sci 2013; 122:42-8. [DOI: 10.1111/eos.12101] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Takashi Iida
- Department of Oral Function and Rehabilitation; Nihon University School of Dentistry at Matsudo; Matsudo Chiba Japan
- Clinical Oral Physiology; Department of Dentistry; Aarhus University; Aarhus Denmark
| | - Osamu Komiyama
- Department of Oral Function and Rehabilitation; Nihon University School of Dentistry at Matsudo; Matsudo Chiba Japan
| | - Ryoko Obara
- Department of Oral Function and Rehabilitation; Nihon University School of Dentistry at Matsudo; Matsudo Chiba Japan
| | - Lene Baad-Hansen
- Clinical Oral Physiology; Department of Dentistry; Aarhus University; Aarhus Denmark
| | - Misao Kawara
- Department of Oral Function and Rehabilitation; Nihon University School of Dentistry at Matsudo; Matsudo Chiba Japan
| | - Peter Svensson
- Clinical Oral Physiology; Department of Dentistry; Aarhus University; Aarhus Denmark
- Center for Functionally Integrative Neuroscience; Mind Laboratory; Aarhus University Hospital; Aarhus Denmark
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14
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Differential responses to anticipation of reward after an acute dose of the designer drugs benzylpiperazine (BZP) and trifluoromethylphenylpiperazine (TFMPP) alone and in combination using functional magnetic resonance imaging (fMRI). Psychopharmacology (Berl) 2013; 229:673-85. [PMID: 23666554 DOI: 10.1007/s00213-013-3128-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2013] [Accepted: 04/17/2013] [Indexed: 10/26/2022]
Abstract
RATIONALE Functional magnetic resonance imaging (fMRI) studies have reported increased activation of the mesolimbic system in response to anticipation of rewarding stimuli. The anticipation of uncertain outcomes evokes activation in the amygdala, orbitofrontal cortex, inferior frontal gyrus and insula. Drugs known to effect dopaminergic and serotonergic neurons also alter regional activation. OBJECTIVES Benzylpiperazine (BZP) and/or trifluoromethylphenylpiperazine (TFMPP) have been recreationally used worldwide for more than a decade. BZP affects mainly dopaminergic neurons, while TFMPP has serotonergic effects. METHODS We investigated the effects of an acute dose of BZP, TFMPP or a combination of BZP and TFMPP on the anticipation of reward in a double-blind, placebo-controlled, crossover study using fMRI. An event-related gambling paradigm was completed by healthy controls 90 min after taking an oral dose of either BZP (200 mg), TFMPP (either 50 or 60 mg), BZP + TFMPP (100 + 30 mg) or placebo. RESULTS After giving BZP, the anticipation of a $4 reward decreased the activation of the inferior frontal gyrus, insula and occipital regions in comparison to placebo. TFMPP increased the activation of the putamen but decreased the activity in the insula relative to placebo. When BZP and TFMPP were given in combination, activation of the rolandic operculum occurred. The magnitude of reward also affected neural correlates. CONCLUSION We propose that the effects of BZP and TFMPP on dopaminergic and serotonergic circuitry, respectively, reflect regional changes. The dopaminergic effects of BZP appear to increase positive arousal and subsequently reduce the response to uncertainty, while TFMPP appears to alter the response to uncertainty by increasing emotional responses.
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Barrós-Loscertales A, González J, Pulvermüller F, Ventura-Campos N, Bustamante JC, Costumero V, Parcet MA, Ávila C. Reading salt activates gustatory brain regions: fMRI evidence for semantic grounding in a novel sensory modality. Cereb Cortex 2012; 22:2554-63. [PMID: 22123940 PMCID: PMC4705335 DOI: 10.1093/cercor/bhr324] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Because many words are typically used in the context of their referent objects and actions, distributed cortical circuits for these words may bind information about their form with perceptual and motor aspects of their meaning. Previous work has demonstrated such semantic grounding for sensorimotor, visual, auditory, and olfactory knowledge linked to words, which is manifest in activation of the corresponding areas of the cortex. Here, we explore the brain basis of gustatory semantic links of words whose meaning is primarily related to taste. In a blocked functional magnetic resonance imaging design, Spanish taste words and control words matched for a range of factors (including valence, arousal, image-ability, frequency of use, number of letters and syllables) were presented to 59 right-handed participants in a passive reading task. Whereas all the words activated the left inferior frontal (BA44/45) and the posterior middle and superior temporal gyri (BA21/22), taste-related words produced a significantly stronger activation in these same areas and also in the anterior insula, frontal operculum, lateral orbitofrontal gyrus, and thalamus among others. As these areas comprise primary and secondary gustatory cortices, we conclude that the meaning of taste words is grounded in distributed cortical circuits reaching into areas that process taste sensations.
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Affiliation(s)
- Alfonso Barrós-Loscertales
- Departamento de Psicología Básica, Clínica y Psicobiología, Facultad de Ciencias Humanas y Sociales, Universitat Jaume I, Avd. Vicente Sos Baynat s/n, Castelló 12071, Spain.
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Quintero A, Ichesco E, Myers C, Schutt R, Gerstner GE. Brain activity and human unilateral chewing: an FMRI study. J Dent Res 2012; 92:136-42. [PMID: 23103631 DOI: 10.1177/0022034512466265] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Brain mechanisms underlying mastication have been studied in non-human mammals but less so in humans. We used functional magnetic resonance imaging (fMRI) to evaluate brain activity in humans during gum chewing. Chewing was associated with activations in the cerebellum, motor cortex and caudate, cingulate, and brainstem. We also divided the 25-second chew-blocks into 5 segments of equal 5-second durations and evaluated activations within and between each of the 5 segments. This analysis revealed activation clusters unique to the initial segment, which may indicate brain regions involved with initiating chewing. Several clusters were uniquely activated during the last segment as well, which may represent brain regions involved with anticipatory or motor events associated with the end of the chew-block. In conclusion, this study provided evidence for specific brain areas associated with chewing in humans and demonstrated that brain activation patterns may dynamically change over the course of chewing sequences.
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Affiliation(s)
- A Quintero
- Department of Biologic and Materials Sciences, School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA
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Ohkubo C, Morokuma M, Yoneyama Y, Matsuda R, Lee JS. Interactions between occlusion and human brain function activities. J Oral Rehabil 2012; 40:119-29. [PMID: 22624951 DOI: 10.1111/j.1365-2842.2012.02316.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
There are few review articles in the area of human research that focus on the interactions between occlusion and brain function. This systematic review discusses the effect of occlusion on the health of the entire body with a focus on brain function. Available relevant articles in English from 1999 to 2011 were assessed in an online database and as hard copies in libraries. The selected 19 articles were classified into the following five categories: chewing and tongue movements, clenching and grinding, occlusal splints and occlusal interference, prosthetic rehabilitation, and pain and stimulation. The relationships between the brain activity observed in the motor and sensory cortices and movements of the oral and maxillofacial area, such as those produced by gum chewing, tapping and clenching, were investigated. It was found that the sensorimotor cortex was also affected by the placement of the occlusal interference devices, splints and implant prostheses. Brain activity may change depending on the strength of the movements in the oral and maxillofacial area. Therefore, mastication and other movements stimulate the activity in the cerebral cortex and may be helpful in preventing degradation of a brain function. However, these findings must be verified by evidence gathered from more subjects.
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Affiliation(s)
- C Ohkubo
- Department of Removable Prosthodontics, Tsurumi University School of Dental Medicine, Yokohama, Japan.
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Chaudhary UJ, Rodionov R, Carmichael DW, Thornton RC, Duncan JS, Lemieux L. Improving the sensitivity of EEG-fMRI studies of epileptic activity by modelling eye blinks, swallowing and other video-EEG detected physiological confounds. Neuroimage 2012; 61:1383-93. [PMID: 22450296 DOI: 10.1016/j.neuroimage.2012.03.028] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Revised: 03/05/2012] [Accepted: 03/08/2012] [Indexed: 10/28/2022] Open
Abstract
RATIONALE To improve the sensitivity and specificity of simultaneous electroencephalography and functional magnetic resonance imaging (EEG-fMRI) it is prudent to devise modelling strategies explaining the residual variance. The purpose of this study is to investigate the potential value of including additional regressors for physiological activities, derived from video-EEG, in the modelling of haemodynamic patterns linked to interictal epileptiform discharges (IEDs) using simultaneously recorded video-EEG-fMRI. METHODS Ten patients with IED (focal epilepsy: 6, idiopathic generalized epilepsy (IGE):4) were studied. BOLD-sensitive fMRI images were acquired on a 3T MRI scanner. 64-channel EEG was recorded using MR-compatible system. A custom made, dual-video-camera system synchronised with EEG was used to record video simultaneously. IEDs and physiological activities were identified and labelled on video-EEG using Brain Analyzer2. fMRI time-series data were pre-processed and analysed using SPM5 software. Two general linear models (GLM) were created; GLM1: IEDs were convolved with the canonical haemodynamic response function and its derivatives. Realignment parameters and pulse regressors were included in the design matrix as confounds, GLM2: GLM1 and additional regressors identified on video-EEG including: eye blinks, hand or foot movement, chewing and swallowing were also included in the design matrix. SPM [F] maps (p<0.05, corrected for family wise error and p<0.001, uncorrected) were generated for both models. We compared the resulting blood oxygen level dependent (BOLD) maps for cluster size, statistical significance and degree of concordance with the irritative zone. RESULTS BOLD changes relating to physiological activities were generally seen in expected brain areas. In patients with focal epilepsy, the extent and Z-score of the IED-related global maximum BOLD clusters increased in 4/6 patients and additional IED-related BOLD clusters were observed in 3/6 patients for GLM2. Also, the degree of concordance of IED-related maps with irritative zone improved for one patient for GLM2 and was unchanged for the other cases. In patients with IGE, the size and statistical significance for global maximum and other BOLD clusters increased in 2/4 patients. We conclude that the inclusion of additional regressors, derived from video based information, in the design matrix explains a greater amount of variance and can reveal additional IED-related BOLD clusters which may be part of the epileptic networks.
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Affiliation(s)
- U J Chaudhary
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
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Kervancioglu BB, Teismann IK, Rain M, Hugger S, Boeckmann JA, Young P, Schwindt W, Pantev C, Doering S. Sensorimotor cortical activation in patients with sleep bruxism. J Sleep Res 2012; 21:507-14. [PMID: 22404768 DOI: 10.1111/j.1365-2869.2012.01005.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Sleep bruxism is assumed to be triggered by a dysfunctional subcortical and cortical network. This study investigates sensorimotor cortical activation in patients with sleep bruxism during clenching and chewing. Nine polysomnographically diagnosed patients and nine healthy control subjects underwent magnetoencephalography (MEG). During clenching and chewing, patients with bruxism revealed significantly larger event-related desynchronization in the somatomotor area (Brodmann area 4) than healthy subjects. Group differences in the muscle activity were ruled out by electromyography (EMG) assessments during MEG. This result might be regarded as a consequence of increased sensorimotor cortical representation of the tongue and chewing musculature due to an enhanced parafunctional muscle activity in bruxers potentially triggered by occlusal factors. Alternatively, a secondary activation of cortical structures during sleep bruxism in the context of an activated network of subcortical and cortical structures might lead to increased cortical representation of the chewing musculature via use dependent plasticity.
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Affiliation(s)
- Bedia B Kervancioglu
- Department of Prosthodontics and Material Sciences, University of Münster, Münster, Germany
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Avivi-Arber L, Martin R, Lee JC, Sessle BJ. Face sensorimotor cortex and its neuroplasticity related to orofacial sensorimotor functions. Arch Oral Biol 2011; 56:1440-65. [DOI: 10.1016/j.archoralbio.2011.04.005] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Revised: 04/05/2011] [Accepted: 04/06/2011] [Indexed: 12/20/2022]
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Iida T, Sakayanagi M, Svensson P, Komiyama O, Hirayama T, Kaneda T, Sakatani K, Kawara M. Influence of periodontal afferent inputs for human cerebral blood oxygenation during jaw movements. Exp Brain Res 2011; 216:375-84. [DOI: 10.1007/s00221-011-2941-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Accepted: 11/04/2011] [Indexed: 11/30/2022]
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Motor control of jaw movements: An fMRI study of parafunctional clench and grind behavior. Brain Res 2011; 1383:206-17. [DOI: 10.1016/j.brainres.2011.01.096] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2010] [Revised: 01/14/2011] [Accepted: 01/26/2011] [Indexed: 01/30/2023]
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Iida T, Kato M, Komiyama O, Suzuki H, Asano T, Kuroki T, Kaneda T, Svensson P, Kawara M. Comparison of cerebral activity during teeth clenching and fist clenching: a functional magnetic resonance imaging study. Eur J Oral Sci 2010; 118:635-41. [DOI: 10.1111/j.1600-0722.2010.00784.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Habre-Hallage P, Hermoye L, Gradkowski W, Jacobs R, Reychler H, Grandin CB. A manually controlled new device for punctuate mechanical stimulation of teeth during functional magnetic resonance imaging studies. J Clin Periodontol 2010; 37:863-72. [DOI: 10.1111/j.1600-051x.2010.01596.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
In this review of 100 fMRI studies of speech comprehension and production, published in 2009, activation is reported for: prelexical speech perception in bilateral superior temporal gyri; meaningful speech in middle and inferior temporal cortex; semantic retrieval in the left angular gyrus and pars orbitalis; and sentence comprehension in bilateral superior temporal sulci. For incomprehensible sentences, activation increases in four inferior frontal regions, posterior planum temporale, and ventral supramarginal gyrus. These effects are associated with the use of prior knowledge of semantic associations, word sequences, and articulation that predict the content of the sentence. Speech production activates the same set of regions as speech comprehension but in addition, activation is reported for: word retrieval in left middle frontal cortex; articulatory planning in the left anterior insula; the initiation and execution of speech in left putamen, pre-SMA, SMA, and motor cortex; and for suppressing unintended responses in the anterior cingulate and bilateral head of caudate nuclei. Anatomical and functional connectivity studies are now required to identify the processing pathways that integrate these areas to support language.
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Affiliation(s)
- Cathy J Price
- Wellcome Trust Centre for Neuroimaging, Institute of Neurology, UCL, London, UK.
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