1
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Vernet M, Ducrot S, Chaix Y. A Systematic Review on Visual-Processing Deficits in Neurofibromatosis Type 1: What Possible Impact on Learning to Read? Dev Neuropsychol 2024; 49:111-137. [PMID: 38469855 DOI: 10.1080/87565641.2024.2326151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 02/27/2024] [Indexed: 03/13/2024]
Abstract
This systematic review aimed to examine the possible implication of visual-perceptual, visuo-attentional and oculomotor processing in the reading deficits frequently experienced by children with Neurofibromatosis type 1 (NF1), as previously shown in dyslexia. Using PRISMA methodological guidelines, we examined 49 studies; most of these reported visual-processing deficits in this population, raising the importance of directly studying the visuo-perceptual and visuo-attentional processes and eye-movement control involved in the learning-to-read process in NF1. The discussion provides a reflection for a better understanding of how visual-processing skills interact with reading deficits in NF1, as well as new avenues for their screening and care.
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Affiliation(s)
- Marie Vernet
- Aix Marseille Univ, CNRS, LPL, Aix-en-Provence, France
- Centre de jour enfants, Centre hospitalier de Digne-les-Bains, Digne-les-Bains, France
- TONIC, Toulouse NeuroImaging Center, Université de Toulouse, Inserm, UPS, Toulouse, France
| | | | - Yves Chaix
- TONIC, Toulouse NeuroImaging Center, Université de Toulouse, Inserm, UPS, Toulouse, France
- Neuropediatric Department, Toulouse-Purpan University Hospital, Toulouse, France
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2
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Lalancette E, Charlebois-Poirier AR, Agbogba K, Knoth IS, Côté V, Perreault S, Lippé S. Time-frequency analyses of repetition suppression and change detection in children with neurofibromatosis type 1. Brain Res 2023; 1818:148512. [PMID: 37499730 DOI: 10.1016/j.brainres.2023.148512] [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: 04/01/2023] [Revised: 06/26/2023] [Accepted: 07/24/2023] [Indexed: 07/29/2023]
Abstract
Children with neurofibromatosis type 1 (NF1) are at increased risk of developing cognitive problems, including attention deficits and learning difficulties. Alterations in brain response to repetition and change have been evidenced in other genetic conditions associated with cognitive dysfunctions. Whether the integrity of these fundamental neural responses is compromised in school-aged children with NF1 is still unknown. In this study, we examined the repetition suppression (RS) and change detection responses in children with NF1 (n = 36) and neurotypical controls (n = 41) aged from 4 to 13 years old, using a simple sequence of vowels. We performed time-frequency analyses to compare spectral power and phase synchronization between groups, in the theta, alpha and beta frequency bands. Correlational analyses were performed between the neural responses and the level of intellectual functioning, as well as with behavioral symptoms of comorbid neurodevelopmental disorders measured through parental questionnaires. Children with NF1 showed preserved RS, but increased spectral power in the change detection response. Correlational analyses performed with measures of change detection revealed a negative association between the alpha-band spectral power and symptoms of inattention and hyperactivity. These findings suggest atypical neural response to change in children with NF1. Further studies should be conducted to clarify the interaction with comorbid neurodevelopmental disorders and the possible role of altered inhibitory mechanisms in this enhanced neural response.
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Affiliation(s)
- Eve Lalancette
- Department of Psychology, University of Montreal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec H2V 2S9, Canada; CHU Sainte-Justine Research Center, 3175 Côte Ste-Catherine, Montreal, Qc. H3T 1C5, Canada.
| | - Audrey-Rose Charlebois-Poirier
- Department of Psychology, University of Montreal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec H2V 2S9, Canada; CHU Sainte-Justine Research Center, 3175 Côte Ste-Catherine, Montreal, Qc. H3T 1C5, Canada.
| | - Kristian Agbogba
- CHU Sainte-Justine Research Center, 3175 Côte Ste-Catherine, Montreal, Qc. H3T 1C5, Canada
| | - Inga Sophia Knoth
- CHU Sainte-Justine Research Center, 3175 Côte Ste-Catherine, Montreal, Qc. H3T 1C5, Canada.
| | - Valérie Côté
- Department of Psychology, University of Montreal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec H2V 2S9, Canada; CHU Sainte-Justine Research Center, 3175 Côte Ste-Catherine, Montreal, Qc. H3T 1C5, Canada
| | - Sébastien Perreault
- Department of Neurosciences, Division of Child Neurology, CHU Sainte-Justine, 3175 Côte Ste-Catherine, Montreal, Qc. H3T 1C5, Canada.
| | - Sarah Lippé
- Department of Psychology, University of Montreal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec H2V 2S9, Canada; CHU Sainte-Justine Research Center, 3175 Côte Ste-Catherine, Montreal, Qc. H3T 1C5, Canada.
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3
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Booth SJ, Garg S, Brown LJE, Green J, Pobric G, Taylor JR. Aberrant oscillatory activity in neurofibromatosis type 1: an EEG study of resting state and working memory. J Neurodev Disord 2023; 15:27. [PMID: 37608248 PMCID: PMC10463416 DOI: 10.1186/s11689-023-09492-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 06/30/2023] [Indexed: 08/24/2023] Open
Abstract
BACKGROUND Neurofibromatosis type 1 (NF1) is a genetic neurodevelopmental disorder commonly associated with impaired cognitive function. Despite the well-explored functional roles of neural oscillations in neurotypical populations, only a limited number of studies have investigated oscillatory activity in the NF1 population. METHODS We compared oscillatory spectral power and theta phase coherence in a paediatric sample with NF1 (N = 16; mean age: 13.03 years; female: n = 7) to an age/sex-matched typically developing control group (N = 16; mean age: 13.34 years; female: n = 7) using electroencephalography measured during rest and during working memory task performance. RESULTS Relative to typically developing children, the NF1 group displayed higher resting state slow wave power and a lower peak alpha frequency. Moreover, higher theta power and frontoparietal theta phase coherence were observed in the NF1 group during working memory task performance, but these differences disappeared when controlling for baseline (resting state) activity. CONCLUSIONS Overall, results suggest that NF1 is characterised by aberrant resting state oscillatory activity that may contribute towards the cognitive impairments experienced in this population. TRIAL REGISTRATION ClinicalTrials.gov, NCT03310996 (first posted: October 16, 2017).
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Affiliation(s)
- Samantha J Booth
- Division of Psychology, Communication and Human Neuroscience, School of Health Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Shruti Garg
- Division of Psychology and Mental Health, School of Health Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
- Child & Adolescent Mental Health Services, Royal Manchester Children's Hospital, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Laura J E Brown
- Division of Psychology and Mental Health, School of Health Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Jonathan Green
- Division of Psychology and Mental Health, School of Health Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
- Child & Adolescent Mental Health Services, Royal Manchester Children's Hospital, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Gorana Pobric
- Division of Psychology, Communication and Human Neuroscience, School of Health Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Jason R Taylor
- Division of Psychology, Communication and Human Neuroscience, School of Health Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK.
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4
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The Neurophysiological Impact of Subacute Stroke: Changes in Cortical Oscillations Evoked by Bimanual Finger Movement. Stroke Res Treat 2022; 2022:9772147. [PMID: 35154632 PMCID: PMC8831071 DOI: 10.1155/2022/9772147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 12/08/2021] [Accepted: 12/29/2021] [Indexed: 11/17/2022] Open
Abstract
Introduction. To design more effective interventions, such as neurostimulation, for stroke rehabilitation, there is a need to understand early physiological changes that take place that may be relevant for clinical monitoring. We aimed to study changes in neurophysiology following recent ischemic stroke, both at rest and with motor planning and execution. Materials and Methods. We included 10 poststroke patients, between 7 and 10 days after stroke, and 20 age-matched controls to assess changes in cortical motor output via transcranial magnetic stimulation and in dynamics of oscillations, as recorded using electroencephalography (EEG). Results. We found significant differences in cortical oscillatory patterns comparing stroke patients with healthy participants, particularly in the beta rhythm during motor planning (
) and execution (
) of a complex movement with fingers from both hands simultaneously. Discussion. The stroke lesion induced a decrease in event-related desynchronization in patients, in comparison to controls, providing evidence for decreased disinhibition. Conclusions. After a stroke lesion, the dynamics of cortical oscillations is changed, with an increasing neural beta synchronization in the course of motor preparation and performance of complex bimanual finger tasks. The observed patterns may provide a potential functional measure that could be used to monitor and design interventional approaches in subacute stages.
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5
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Dionísio A, Gouveia R, Castelhano J, Duarte IC, Santo GC, Sargento-Freitas J, Duecker F, Castelo-Branco M. The Role of Continuous Theta Burst TMS in the Neurorehabilitation of Subacute Stroke Patients: A Placebo-Controlled Study. Front Neurol 2021; 12:749798. [PMID: 34803887 PMCID: PMC8599133 DOI: 10.3389/fneur.2021.749798] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 09/30/2021] [Indexed: 11/13/2022] Open
Abstract
Objectives: Transcranial magnetic stimulation, in particular continuous theta burst (cTBS), has been proposed for stroke rehabilitation, based on the concept that inhibition of the healthy hemisphere helps promote the recovery of the lesioned one. We aimed to study its effects on cortical excitability, oscillatory patterns, and motor function, the main aim being to identify potentially beneficial neurophysiological effects. Materials and Methods: We applied randomized real or placebo stimulation over the unaffected primary motor cortex of 10 subacute (7 ± 3 days) post-stroke patients. Neurophysiological measurements were performed using electroencephalography and electromyography. Motor function was assessed with the Wolf Motor Function Test. We performed a repeated measure study with the recordings taken pre-, post-cTBS, and at 3 months' follow-up. Results: We investigated changes in motor rhythms during arm elevation and thumb opposition tasks and found significant changes in beta power of the affected thumb's opposition, specifically after real cTBS. Our results are consistent with an excitatory response (increase in event-related desynchronization) in the sensorimotor cortical areas of the affected hemisphere, after stimulation. Neither peak-to-peak amplitude of motor-evoked potentials nor motor performance were significantly altered. Conclusions: Consistently with the theoretical prediction, this contralateral inhibitory stimulation paradigm changes neurophysiology, leading to a significant excitatory impact on the cortical oscillatory patterns of the contralateral hemisphere. These proof-of-concept results provide evidence for the potential role of continuous TBS in the neurorehabilitation of post-stroke patients. We suggest that these changes in ERS/ERD patterns should be further explored in future phase IIb/phase III clinical trials, in larger samples of poststroke patients.
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Affiliation(s)
- Ana Dionísio
- Institute of Nuclear Sciences Applied to Health ICNAS, Coimbra Institute for Biomedical Imaging and Translational Research CIBIT, University of Coimbra, Coimbra, Portugal.,Faculty of Sciences and Technology FCTUC, Department of Physics, University of Coimbra, Coimbra, Portugal.,Faculty of Medicine FMUC, University of Coimbra, Coimbra, Portugal
| | - Rita Gouveia
- Institute of Nuclear Sciences Applied to Health ICNAS, Coimbra Institute for Biomedical Imaging and Translational Research CIBIT, University of Coimbra, Coimbra, Portugal
| | - João Castelhano
- Institute of Nuclear Sciences Applied to Health ICNAS, Coimbra Institute for Biomedical Imaging and Translational Research CIBIT, University of Coimbra, Coimbra, Portugal.,Faculty of Medicine FMUC, University of Coimbra, Coimbra, Portugal
| | - Isabel Catarina Duarte
- Institute of Nuclear Sciences Applied to Health ICNAS, Coimbra Institute for Biomedical Imaging and Translational Research CIBIT, University of Coimbra, Coimbra, Portugal.,Faculty of Medicine FMUC, University of Coimbra, Coimbra, Portugal
| | - Gustavo C Santo
- Stroke Unit, Neurology Department, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - João Sargento-Freitas
- Stroke Unit, Neurology Department, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - Felix Duecker
- Institute of Nuclear Sciences Applied to Health ICNAS, Coimbra Institute for Biomedical Imaging and Translational Research CIBIT, University of Coimbra, Coimbra, Portugal.,Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, Netherlands.,Maastricht Brain Imaging Center, Maastricht University, Maastricht, Netherlands
| | - Miguel Castelo-Branco
- Institute of Nuclear Sciences Applied to Health ICNAS, Coimbra Institute for Biomedical Imaging and Translational Research CIBIT, University of Coimbra, Coimbra, Portugal.,Faculty of Medicine FMUC, University of Coimbra, Coimbra, Portugal.,Maastricht Brain Imaging Center, Maastricht University, Maastricht, Netherlands.,Brain Imaging Network, University of Coimbra, Coimbra, Portugal
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6
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Towards a Pragmatic Approach to a Psychophysiological Unit of Analysis for Mental and Brain Disorders: An EEG-Copeia for Neurofeedback. Appl Psychophysiol Biofeedback 2020; 44:151-172. [PMID: 31098793 DOI: 10.1007/s10484-019-09440-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This article proposes what we call an "EEG-Copeia" for neurofeedback, like the "Pharmacopeia" for psychopharmacology. This paper proposes to define an "EEG-Copeia" as an organized list of scientifically validated EEG markers, characterized by a specific association with an identified cognitive process, that define a psychophysiological unit of analysis useful for mental or brain disorder evaluation and treatment. A characteristic of EEG neurofeedback for mental and brain disorders is that it targets a EEG markers related to a supposed cognitive process, whereas conventional treatments target clinical manifestations. This could explain why EEG neurofeedback studies encounter difficulty in achieving reproducibility and validation. The present paper suggests that a first step to optimize EEG neurofeedback protocols and future research is to target a valid EEG marker. The specificity of the cognitive skills trained and learned during real time feedback of the EEG marker could be enhanced and both the reliability of neurofeedback training and the therapeutic impact optimized. However, several of the most well-known EEG markers have seldom been applied for neurofeedback. Moreover, we lack a reliable and valid EEG targets library for further RCT to evaluate the efficacy of neurofeedback in mental and brain disorders. With the present manuscript, our aim is to foster dialogues between cognitive neuroscience and EEG neurofeedback according to a psychophysiological perspective. The primary objective of this review was to identify the most robust EEG target. EEG markers linked with one or several clearly identified cognitive-related processes will be identified. The secondary objective was to organize these EEG markers and related cognitive process in a psychophysiological unit of analysis matrix inspired by the Research Domain Criteria (RDoC) project.
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7
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Dionísio A, Gouveia R, Duarte IC, Castelhano J, Duecker F, Castelo-Branco M. Continuous theta burst stimulation increases contralateral mu and beta rhythms with arm elevation: implications for neurorehabilitation. J Neural Transm (Vienna) 2019; 127:17-25. [PMID: 31844983 DOI: 10.1007/s00702-019-02117-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Accepted: 12/07/2019] [Indexed: 11/24/2022]
Abstract
The study of the physiological effects underlying brain response to transcranial magnetic stimulation is important to understand its impact on neurorehabilitation. We aim to analyze the impact of a transcranial magnetic stimulation protocol, the continuous theta burst (cTBS), on human neurophysiology, particularly on contralateral motor rhythms. cTBS was applied in 20 subjects over the primary motor cortex. We recorded brain electrical activity pre- and post-cTBS with electroencephalography both at rest and while performing motor tasks, to evaluate changes in brain oscillatory patterns such as mu and beta rhythms. Moreover, we measured motor-evoked potentials before and after cTBS to assess its impact on brain's excitability. On the hemisphere contralateral to the protocol, we did observe a significant increase in mu (p = 0.027) and beta (p = 0.006) rhythms from pre- to post-cTBS, at the beginning of arm elevation. The topology of action planning and motor execution suggests that cTBS produced an inhibitory effect that propagated to the contralateral hemisphere, thereby precluding the expected/desired excitation for therapy purposes. This novel approach provides support for the notion that this protocol induces inhibitory changes in contralateral motor rhythms, by decreasing desynchronization, contradicting the ipsilateral inhibition vs. contralateral disinhibition hypothesis. Our results have implications for personalized cTBS usage as a rehabilitation intervention, suggesting that an unexpected propagation of inhibition can occur.
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Affiliation(s)
- Ana Dionísio
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), Institute of Nuclear Sciences Applied to Health (ICNAS), University of Coimbra, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal.,Department of Physics, Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal.,Institute for Biomedical Imaging and Life Sciences (CNC.IBILI), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Rita Gouveia
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), Institute of Nuclear Sciences Applied to Health (ICNAS), University of Coimbra, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
| | - Isabel Catarina Duarte
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), Institute of Nuclear Sciences Applied to Health (ICNAS), University of Coimbra, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal.,Institute for Biomedical Imaging and Life Sciences (CNC.IBILI), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - João Castelhano
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), Institute of Nuclear Sciences Applied to Health (ICNAS), University of Coimbra, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal.,Institute for Biomedical Imaging and Life Sciences (CNC.IBILI), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Felix Duecker
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), Institute of Nuclear Sciences Applied to Health (ICNAS), University of Coimbra, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal.,Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.,Maastricht Brain Imaging Center, Maastricht University, Maastricht, The Netherlands
| | - Miguel Castelo-Branco
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), Institute of Nuclear Sciences Applied to Health (ICNAS), University of Coimbra, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal. .,Institute for Biomedical Imaging and Life Sciences (CNC.IBILI), Faculty of Medicine, University of Coimbra, Coimbra, Portugal. .,Brain Imaging Network, University of Coimbra, Coimbra, Portugal.
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8
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Nemmi F, Cignetti F, Assaiante C, Maziero S, Audic F, Péran P, Chaix Y. Discriminating between neurofibromatosis-1 and typically developing children by means of multimodal MRI and multivariate analyses. Hum Brain Mapp 2019; 40:3508-3521. [PMID: 31077476 DOI: 10.1002/hbm.24612] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 04/08/2019] [Accepted: 04/17/2019] [Indexed: 11/08/2022] Open
Abstract
Neurofibromatosis Type 1 leads to brain anomalies involving both gray and white matter. The extent and granularity of these anomalies, together with their possible impact on brain activity, is still unknown. In this multicentric cross-sectional study we submitted a sample of 42 typically developing and 38 neurofibromatosis-1 children to a multimodal MRI assessment including T1, diffusion weighted and resting state functional sequences. We used a pipeline involving several features selection steps coupled with multivariate statistical analysis (supporting vector machine) to discriminate between the two groups while having interpretable models. We used MRI indexes measuring macro (gray matter volume) and microstructural (fractional anisotropy, mean diffusivity) characteristics of the brain, as well as indexes of brain activity (fractional amplitude of low frequency fluctuations) and connectivity (local and global correlation) at rest. We found that structural indexes could discriminate between the two groups, with the mean diffusivity leading to performance as high as the combination of all structural indexes combined (accuracy = 0.86), while functional indexes had worse performances. The MRI signature of NF1 brain pathology is a combination of gray and white matter abnormalities, as measured with gray matter volume, fractional anisotropy, and mean diffusivity.
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Affiliation(s)
- Federico Nemmi
- ToNIC, Toulouse NeuroImaging Center, Université de Toulouse, Inserm, UPS, Toulouse, France
| | - Fabien Cignetti
- CNRS, LNC, Aix Marseille Université, Marseille, France.,CNRS, Fédération 3C, Aix Marseille Université, Marseille, France.,CNRS, TIMC-IMAG, Université Grenoble Alpes, Grenoble, France
| | - Christine Assaiante
- CNRS, LNC, Aix Marseille Université, Marseille, France.,CNRS, Fédération 3C, Aix Marseille Université, Marseille, France
| | - Stephanie Maziero
- ToNIC, Toulouse NeuroImaging Center, Université de Toulouse, Inserm, UPS, Toulouse, France.,URI Octogone-Lordat (EA 4156), Université de Toulouse, Toulouse, France
| | - Fredrique Audic
- Service de Neurologie Pédiatrique, CHU Timone-Enfants, Marseille, France
| | - Patrice Péran
- ToNIC, Toulouse NeuroImaging Center, Université de Toulouse, Inserm, UPS, Toulouse, France
| | - Yves Chaix
- ToNIC, Toulouse NeuroImaging Center, Université de Toulouse, Inserm, UPS, Toulouse, France
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9
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Silva G, Duarte IC, Bernardino I, Marques T, Violante IR, Castelo-Branco M. Oscillatory motor patterning is impaired in neurofibromatosis type 1: a behavioural, EEG and fMRI study. J Neurodev Disord 2018; 10:11. [PMID: 29566645 PMCID: PMC5863896 DOI: 10.1186/s11689-018-9230-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Accepted: 03/15/2018] [Indexed: 12/17/2022] Open
Abstract
Background Neurofibromatosis type1 (NF1) is associated with a broad range of behavioural deficits, and an imbalance between excitatory and inhibitory neurotransmission has been postulated in this disorder. Inhibition is involved in the control of frequency and stability of motor rhythms. Therefore, we aimed to explore the link between behavioural motor control, brain rhythms and brain activity, as assessed by EEG and fMRI in NF1. Methods We studied a cohort of 21 participants with NF1 and 20 age- and gender-matched healthy controls, with a finger-tapping task requiring pacing at distinct frequencies during EEG and fMRI scans. Results We found that task performance was significantly different between NF1 and controls, the latter showing higher tapping time precision. The time-frequency patterns at the beta sub-band (20–26 Hz) mirrored the behavioural modulations, with similar cyclic synchronization/desynchronization patterns for both groups. fMRI results showed a higher recruitment of the extrapyramidal motor system (putamen, cerebellum and red nucleus) in the control group during the fastest pacing condition. Conclusions The present study demonstrated impaired precision in rhythmic pacing behaviour in NF1 as compared with controls. We found a decreased recruitment of the cerebellum, a structure where inhibitory interneurons are essential regulators of rhythmic synchronization, and in deep brain regions pivotally involved in motor pacing. Our findings shed light into the neural underpinnings of motor timing deficits in NF1.
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Affiliation(s)
- Gilberto Silva
- CNC.IBILI, Institute for Biomedical Imaging and Life Sciences, University of Coimbra, 3000-548, Coimbra, Portugal.,ICNAS, CIBIT, Institute for Nuclear Sciences Applied to Health, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Isabel Catarina Duarte
- CNC.IBILI, Institute for Biomedical Imaging and Life Sciences, University of Coimbra, 3000-548, Coimbra, Portugal.,ICNAS, CIBIT, Institute for Nuclear Sciences Applied to Health, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Inês Bernardino
- CNC.IBILI, Institute for Biomedical Imaging and Life Sciences, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Tânia Marques
- CNC.IBILI, Institute for Biomedical Imaging and Life Sciences, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Inês R Violante
- School of Psychology, Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, UK
| | - Miguel Castelo-Branco
- CNC.IBILI, Institute for Biomedical Imaging and Life Sciences, University of Coimbra, 3000-548, Coimbra, Portugal. .,ICNAS, CIBIT, Institute for Nuclear Sciences Applied to Health, University of Coimbra, 3000-548, Coimbra, Portugal.
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