1
|
Hakonen M, Dahmani L, Lankinen K, Ren J, Barbaro J, Blazejewska A, Cui W, Kotlarz P, Li M, Polimeni JR, Turpin T, Uluç I, Wang D, Liu H, Ahveninen J. Individual connectivity-based parcellations reflect functional properties of human auditory cortex. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.20.576475. [PMID: 38293021 PMCID: PMC10827228 DOI: 10.1101/2024.01.20.576475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Neuroimaging studies of the functional organization of human auditory cortex have focused on group-level analyses to identify tendencies that represent the typical brain. Here, we mapped auditory areas of the human superior temporal cortex (STC) in 30 participants by combining functional network analysis and 1-mm isotropic resolution 7T functional magnetic resonance imaging (fMRI). Two resting-state fMRI sessions, and one or two auditory and audiovisual speech localizer sessions, were collected on 3-4 separate days. We generated a set of functional network-based parcellations from these data. Solutions with 4, 6, and 11 networks were selected for closer examination based on local maxima of Dice and Silhouette values. The resulting parcellation of auditory cortices showed high intraindividual reproducibility both between resting state sessions (Dice coefficient: 69-78%) and between resting state and task sessions (Dice coefficient: 62-73%). This demonstrates that auditory areas in STC can be reliably segmented into functional subareas. The interindividual variability was significantly larger than intraindividual variability (Dice coefficient: 57%-68%, p<0.001), indicating that the parcellations also captured meaningful interindividual variability. The individual-specific parcellations yielded the highest alignment with task response topographies, suggesting that individual variability in parcellations reflects individual variability in auditory function. Connectional homogeneity within networks was also highest for the individual-specific parcellations. Furthermore, the similarity in the functional parcellations was not explainable by the similarity of macroanatomical properties of auditory cortex. Our findings suggest that individual-level parcellations capture meaningful idiosyncrasies in auditory cortex organization.
Collapse
Affiliation(s)
- M Hakonen
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital Charlestown, MA, USA
- Department of Radiology, Harvard Medical School, Boston, MA, USA
| | - L Dahmani
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital Charlestown, MA, USA
- Department of Radiology, Harvard Medical School, Boston, MA, USA
| | - K Lankinen
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital Charlestown, MA, USA
- Department of Radiology, Harvard Medical School, Boston, MA, USA
| | - J Ren
- Division of Brain Sciences, Changping Laboratory, Beijing, China
| | - J Barbaro
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital Charlestown, MA, USA
| | - A Blazejewska
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital Charlestown, MA, USA
- Department of Radiology, Harvard Medical School, Boston, MA, USA
| | - W Cui
- Division of Brain Sciences, Changping Laboratory, Beijing, China
| | - P Kotlarz
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital Charlestown, MA, USA
| | - M Li
- Division of Brain Sciences, Changping Laboratory, Beijing, China
| | - J R Polimeni
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital Charlestown, MA, USA
- Department of Radiology, Harvard Medical School, Boston, MA, USA
- Harvard-MIT Program in Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - T Turpin
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital Charlestown, MA, USA
| | - I Uluç
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital Charlestown, MA, USA
- Department of Radiology, Harvard Medical School, Boston, MA, USA
| | - D Wang
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital Charlestown, MA, USA
- Department of Radiology, Harvard Medical School, Boston, MA, USA
| | - H Liu
- Division of Brain Sciences, Changping Laboratory, Beijing, China
- Biomedical Pioneering Innovation Center (BIOPIC), Peking University, Beijing, China
| | - J Ahveninen
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital Charlestown, MA, USA
- Department of Radiology, Harvard Medical School, Boston, MA, USA
| |
Collapse
|
2
|
Luo J, Qin P, Bi Q, Wu K, Gong G. Individual variability in functional connectivity of human auditory cortex. Cereb Cortex 2024; 34:bhae007. [PMID: 38282455 DOI: 10.1093/cercor/bhae007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 01/30/2024] Open
Abstract
Individual variability in functional connectivity underlies individual differences in cognition and behaviors, yet its association with functional specialization in the auditory cortex remains elusive. Using resting-state functional magnetic resonance imaging data from the Human Connectome Project, this study was designed to investigate the spatial distribution of auditory cortex individual variability in its whole-brain functional network architecture. An inherent hierarchical axis of the variability was discerned, which radiates from the medial to lateral orientation, with the left auditory cortex demonstrating more pronounced variations than the right. This variability exhibited a significant correlation with the variations in structural and functional metrics in the auditory cortex. Four auditory cortex subregions, which were identified from a clustering analysis based on this variability, exhibited unique connectional fingerprints and cognitive maps, with certain subregions showing specificity to speech perception functional activation. Moreover, the lateralization of the connectional fingerprint exhibited a U-shaped trajectory across the subregions. These findings emphasize the role of individual variability in functional connectivity in understanding cortical functional organization, as well as in revealing its association with functional specialization from the activation, connectome, and cognition perspectives.
Collapse
Affiliation(s)
- Junhao Luo
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, China
| | - Peipei Qin
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, China
| | - Qiuhui Bi
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, China
- School of Artificial Intelligence, Beijing Normal University, Beijing 100875, China
| | - Ke Wu
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, China
| | - Gaolang Gong
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, China
- Beijing Key Laboratory of Brain Imaging and Connectomics, Beijing Normal University, Beijing 100875, China
- Chinese Institute for Brain Research, Beijing 102206, China
| |
Collapse
|
3
|
Thomas G, McMahon KL, Finch E, Copland DA. Interindividual variability and consistency of language mapping paradigms for presurgical use. BRAIN AND LANGUAGE 2023; 243:105299. [PMID: 37413742 DOI: 10.1016/j.bandl.2023.105299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 04/08/2023] [Accepted: 06/21/2023] [Indexed: 07/08/2023]
Abstract
Most functional MRI studies of language processing have focussed on group-level inference, but for clinical use, the aim is to predict outcomes at an individual patient level. This requires being able to identify atypical activation and understand how differences relate to language outcomes. A language mapping paradigm that selectively activates left hemisphere language regions in healthy individuals allows atypical activation in a patient to be more easily identified. We investigated the interindividual variability and consistency of language activation in 12 healthy participants using three tasks-verb generation, responsive naming, and sentence comprehension-for future presurgical use. Responsive naming produced the most consistent left-lateralised activation across participants in frontal and temporal regions that postsurgical voxel-based lesion-symptom mapping studies suggest are most critical for language outcomes. Studies with a long-term clinical aim of predicting language outcomes in neurosurgical patients and stroke patients should first establish paradigm validity at an individual level in healthy participants.
Collapse
Affiliation(s)
- Georgia Thomas
- School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Australia; Queensland Aphasia Research Centre, School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Australia.
| | - Katie L McMahon
- School of Clinical Sciences, Centre for Biomedical Technologies, Queensland University of Technology, Brisbane, Australia; Herston Imaging Research Facility, The University of Queensland, Brisbane, Australia
| | - Emma Finch
- School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Australia; Research and Innovation, West Moreton Health, Ipswich, Australia; Speech Pathology Department, Princess Alexandra Hospital, Brisbane, Australia
| | - David A Copland
- School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Australia; Queensland Aphasia Research Centre, School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Australia; Surgical Treatment and Rehabilitation Service (STARS) Education and Research Alliance, The University of Queensland and Metro North Health, Queensland, Australia
| |
Collapse
|
4
|
Skipper JI, Aliko S, Brown S, Jo YJ, Lo S, Molimpakis E, Lametti DR. Reorganization of the Neurobiology of Language After Sentence Overlearning. Cereb Cortex 2021; 32:2447-2468. [PMID: 34585723 PMCID: PMC9157312 DOI: 10.1093/cercor/bhab354] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/27/2021] [Accepted: 08/29/2021] [Indexed: 11/14/2022] Open
Abstract
It is assumed that there are a static set of "language regions" in the brain. Yet, language comprehension engages regions well beyond these, and patients regularly produce familiar "formulaic" expressions when language regions are severely damaged. These suggest that the neurobiology of language is not fixed but varies with experiences, like the extent of word sequence learning. We hypothesized that perceiving overlearned sentences is supported by speech production and not putative language regions. Participants underwent 2 sessions of behavioral testing and functional magnetic resonance imaging (fMRI). During the intervening 15 days, they repeated 2 sentences 30 times each, twice a day. In both fMRI sessions, they "passively" listened to those sentences, novel sentences, and produced sentences. Behaviorally, evidence for overlearning included a 2.1-s decrease in reaction times to predict the final word in overlearned sentences. This corresponded to the recruitment of sensorimotor regions involved in sentence production, inactivation of temporal and inferior frontal regions involved in novel sentence listening, and a 45% change in global network organization. Thus, there was a profound whole-brain reorganization following sentence overlearning, out of "language" and into sensorimotor regions. The latter are generally preserved in aphasia and Alzheimer's disease, perhaps explaining residual abilities with formulaic expressions in both.
Collapse
Affiliation(s)
| | - Sarah Aliko
- Experimental Psychology, University College London, London, UK.,London Interdisciplinary Biosciences Consortium, University College London, London, UK
| | - Stephen Brown
- Natural Sciences, University College London, London, UK
| | - Yoon Ju Jo
- Experimental Psychology, University College London, London, UK
| | - Serena Lo
- Speech and Language Sciences, University College London, London, UK
| | - Emilia Molimpakis
- Wellcome Centre for Human Neuroimaging, University College London, London, UK
| | - Daniel R Lametti
- Experimental Psychology, University College London, London, UK.,Department of Psychology, Acadia University, Nova Scotia, Canada
| |
Collapse
|
5
|
Zenke JK, Rahman S, Guo Q, Leung AWS, Gomaa NA. Central Processing in Tinnitus: fMRI Study Outlining Patterns of Activation Using an Auditory Discrimination Task in Normal Versus Tinnitus Patients. Otol Neurotol 2021; 42:e1170-e1180. [PMID: 34086638 DOI: 10.1097/mao.0000000000003194] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Elucidate brain activity differences between patients with tinnitus and controls. STUDY DESIGN Cross-sectional cohort study. SETTING Outpatient Otolaryngology clinic. PATIENTS Three cohorts; 8 controls, 12 with subjective idiopathic tinnitus (tinnitus without hearing loss), and 12 with both tinnitus and hearing loss. INTERVENTION An auditory oddball identification task was performed in fMRI scanner. MAIN OUTCOME MEASURES Task performance and Tinnitus Handicap Inventory (THI) scores were recorded. Brain activation maps were generated comparing deviant and standard tones as well as at rest. One-way and two-way T-contrasts were generated in addition to multiple regression modeling which identified significant brain regions predicting tinnitus, disease severity, duration, and task performance. RESULTS Task performance worsened in tinnitus patients with increased auditory workload, in terms of additional hearing loss. THI score and grade correlated with false alarms. The limbic system, heschel's gyrus, angular gyrus and cerebellum have a significant effect on both brain behavior in patients with tinnitus, and predictability of tinnitus and its behavioral implications. CONCLUSION Increased auditory workload resulted in poorer task performance. Moreover, it is possible to predict auditory task performance in patients with tinnitus by looking at the activity of specific regions of interest. Heschl's gyrus, angular gyrus, cerebellar, and limbic system activity are important contributors to neurological activity associated with tinnitus. Finally, predictive modeling may influence further research surrounding tinnitus treatment.
Collapse
Affiliation(s)
- Julianna K Zenke
- Division of Otolaryngology Head and Neck Surgery, Department of Surgery
| | | | - Qi Guo
- Faculty of Medicine and Dentistry
| | - Ada W S Leung
- Neuroscience and Mental Health Institute
- Department of Occupational Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Nahla A Gomaa
- Division of Otolaryngology Head and Neck Surgery, Department of Surgery
- Faculty of Medicine and Dentistry
| |
Collapse
|
6
|
Abstract
Action videogames have been shown to induce modifications in perceptual and cognitive systems, as well as in brain structure and function. Nevertheless, whether such changes are correlated with brain functional connectivity modifications outlasting the training period is not known. Functional magnetic resonance imaging (fMRI) was used in order to quantify acute and long-lasting connectivity changes following a sustained gaming experience on a first-person shooter (FPS) game. Thirty-five healthy participants were assigned to either a gaming or a control group prior to the acquisition of resting state fMRI data and a comprehensive cognitive assessment at baseline (T0), post-gaming (T1) and at a 3 months' follow-up (T2). Seed-based resting-state functional connectivity (rs-FC) analysis revealed a significant greater connectivity between left thalamus and left parahippocampal gyrus in the gamer group, both at T1 and at T2. Furthermore, a positive increase in the rs-FC between the cerebellum, Heschl's gyrus and the middle frontal gyrus paralleled improvements of in-gaming performance. In addition, baseline rs-FC of left supramarginal gyrus, left middle frontal gyrus and right cerebellum were associated with individual changes in videogame performance. Finally, enhancement of perceptual and attentional measures was observed at both T1 and T2, which correlated with a pattern of rs-FC changes in bilateral occipito-temporal regions belonging to the visual and attention fMRI networks. The present findings increase knowledge on functional connectivity changes induced by action videogames, pointing to a greater and long-lasting synchronization between brain regions associated with spatial orientation, visual discrimination and motor learning even after a relatively short multi-day gaming exposure.
Collapse
|
7
|
Expert Programmers Have Fine-Tuned Cortical Representations of Source Code. eNeuro 2021; 8:ENEURO.0405-20.2020. [PMID: 33318072 PMCID: PMC7877476 DOI: 10.1523/eneuro.0405-20.2020] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 11/14/2020] [Accepted: 12/01/2020] [Indexed: 11/30/2022] Open
Abstract
Expertise enables humans to achieve outstanding performance on domain-specific tasks, and programming is no exception. Many studies have shown that expert programmers exhibit remarkable differences from novices in behavioral performance, knowledge structure, and selective attention. However, the underlying differences in the brain of programmers are still unclear. We here address this issue by associating the cortical representation of source code with individual programming expertise using a data-driven decoding approach. This approach enabled us to identify seven brain regions, widely distributed in the frontal, parietal, and temporal cortices, that have a tight relationship with programming expertise. In these brain regions, functional categories of source code could be decoded from brain activity and the decoding accuracies were significantly correlated with individual behavioral performances on a source-code categorization task. Our results suggest that programming expertise is built on fine-tuned cortical representations specialized for the domain of programming.
Collapse
|
8
|
Ren J, Xu T, Wang D, Li M, Lin Y, Schoeppe F, Ramirez JSB, Han Y, Luan G, Li L, Liu H, Ahveninen J. Individual Variability in Functional Organization of the Human and Monkey Auditory Cortex. Cereb Cortex 2020; 31:2450-2465. [PMID: 33350445 DOI: 10.1093/cercor/bhaa366] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 11/01/2020] [Accepted: 11/05/2020] [Indexed: 12/13/2022] Open
Abstract
Accumulating evidence shows that auditory cortex (AC) of humans, and other primates, is involved in more complex cognitive processes than feature segregation only, which are shaped by experience-dependent plasticity and thus likely show substantial individual variability. However, thus far, individual variability of ACs has been considered a methodological impediment rather than a phenomenon of theoretical importance. Here, we examined the variability of ACs using intrinsic functional connectivity patterns in humans and macaques. Our results demonstrate that in humans, interindividual variability is greater near the nonprimary than primary ACs, indicating that variability dramatically increases across the processing hierarchy. ACs are also more variable than comparable visual areas and show higher variability in the left than in the right hemisphere, which may be related to the left lateralization of auditory-related functions such as language. Intriguingly, remarkably similar modality differences and lateralization of variability were also observed in macaques. These connectivity-based findings are consistent with a confirmatory task-based functional magnetic resonance imaging analysis. The quantification of variability in auditory function, and the similar findings in both humans and macaques, will have strong implications for understanding the evolution of advanced auditory functions in humans.
Collapse
Affiliation(s)
- Jianxun Ren
- National Engineering Laboratory for Neuromodulation, School of Aerospace Engineering, Tsinghua University, 100084 Beijing, China.,Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Ting Xu
- Center for the Developing Brain, Child Mind Institute, New York, NY 10022, USA
| | - Danhong Wang
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Meiling Li
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Yuanxiang Lin
- Department of Neurosurgery, First Affiliated Hospital, Fujian Medical University, 350108 Fuzhou, China
| | - Franziska Schoeppe
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Julian S B Ramirez
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR 97239, USA
| | - Ying Han
- Department of Neurology, Xuanwu Hospital of Capital Medical University, 100053 Beijing, China
| | - Guoming Luan
- Department of Neurosurgery, Comprehensive Epilepsy Center, Sanbo Brain Hospital, Capital Medical University, 100093 Beijing, China
| | - Luming Li
- National Engineering Laboratory for Neuromodulation, School of Aerospace Engineering, Tsinghua University, 100084 Beijing, China.,Precision Medicine & Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, 518055 Shenzhen, China.,IDG/McGovern Institute for Brain Research, Tsinghua University, 100084 Beijing, China
| | - Hesheng Liu
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.,Department of Neuroscience, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Jyrki Ahveninen
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| |
Collapse
|
9
|
Khan DM, Kamel N, Muzaimi M, Hill T. Effective Connectivity for Default Mode Network Analysis of Alcoholism. Brain Connect 2020; 11:12-29. [PMID: 32842756 DOI: 10.1089/brain.2019.0721] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Introduction: With the recent technical advances in brain imaging modalities such as magnetic resonance imaging, positron emission tomography, and functional magnetic resonance imaging (fMRI), researchers' interests have inclined over the years to study brain functions through the analysis of the variations in the statistical dependence among various brain regions. Through its wide use in studying brain connectivity, the low temporal resolution of the fMRI represented by the limited number of samples per second, in addition to its dependence on brain slow hemodynamic changes, makes it of limited capability in studying the fast underlying neural processes during information exchange between brain regions. Materials and Methods: In this article, the high temporal resolution of the electroencephalography (EEG) is utilized to estimate the effective connectivity within the default mode network (DMN). The EEG data are collected from 20 subjects with alcoholism and 25 healthy subjects (controls), and used to obtain the effective connectivity diagram of the DMN using the Partial Directed Coherence algorithm. Results: The resulting effective connectivity diagram within the DMN shows the unidirectional causal effect of each region on the other. The variations in the causal effects within the DMN between controls and alcoholics show clear correlation with the symptoms that are usually associated with alcoholism, such as cognitive and memory impairments, executive control, and attention deficiency. The correlation between the exchanged causal effects within the DMN and symptoms related to alcoholism is discussed and properly analyzed. Conclusion: The establishment of the causal differences between control and alcoholic subjects within the DMN regions provides valuable insight into the mechanism by which alcohol modulates our cognitive and executive functions and creates better possibility for effective treatment of alcohol use disorder.
Collapse
Affiliation(s)
- Danish M Khan
- Centre for Intelligent Signal & Imaging Research (CISIR), Electrical & Electronic Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Malaysia.,Department of Electronic and Telecommunications Engineering, NED University of Engineering & Technology, University Road, Karachi, Pakistan
| | - Nidal Kamel
- Centre for Intelligent Signal & Imaging Research (CISIR), Electrical & Electronic Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Malaysia
| | - Mustapha Muzaimi
- Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian Malaysia
| | - Timothy Hill
- Neurotherapy & Psychology, Brain Therapy Centre, Kent Town, Australia
| |
Collapse
|
10
|
Aliko S, Huang J, Gheorghiu F, Meliss S, Skipper JI. A naturalistic neuroimaging database for understanding the brain using ecological stimuli. Sci Data 2020; 7:347. [PMID: 33051448 PMCID: PMC7555491 DOI: 10.1038/s41597-020-00680-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 09/16/2020] [Indexed: 12/22/2022] Open
Abstract
Neuroimaging has advanced our understanding of human psychology using reductionist stimuli that often do not resemble information the brain naturally encounters. It has improved our understanding of the network organization of the brain mostly through analyses of 'resting-state' data for which the functions of networks cannot be verifiably labelled. We make a 'Naturalistic Neuroimaging Database' (NNDb v1.0) publically available to allow for a more complete understanding of the brain under more ecological conditions during which networks can be labelled. Eighty-six participants underwent behavioural testing and watched one of 10 full-length movies while functional magnetic resonance imaging was acquired. Resulting timeseries data are shown to be of high quality, with good signal-to-noise ratio, few outliers and low movement. Data-driven functional analyses provide further evidence of data quality. They also demonstrate accurate timeseries/movie alignment and how movie annotations might be used to label networks. The NNDb can be used to answer questions previously unaddressed with standard neuroimaging approaches, progressing our knowledge of how the brain works in the real world.
Collapse
Affiliation(s)
- Sarah Aliko
- London Interdisciplinary Biosciences Consortium, University College London, London, UK.
- Experimental Psychology, University College London, London, UK.
| | - Jiawen Huang
- Experimental Psychology, University College London, London, UK
| | | | - Stefanie Meliss
- Experimental Psychology, University College London, London, UK
- School of Psychology and Clinical Language Sciences, University of Reading, Reading, UK
| | | |
Collapse
|
11
|
Sajid N, Parr T, Hope TM, Price CJ, Friston KJ. Degeneracy and Redundancy in Active Inference. Cereb Cortex 2020; 30:5750-5766. [PMID: 32488244 PMCID: PMC7899066 DOI: 10.1093/cercor/bhaa148] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 05/11/2020] [Accepted: 05/11/2020] [Indexed: 12/16/2022] Open
Abstract
The notions of degeneracy and redundancy are important constructs in many areas, ranging from genomics through to network science. Degeneracy finds a powerful role in neuroscience, explaining key aspects of distributed processing and structure-function relationships in the brain. For example, degeneracy accounts for the superadditive effect of lesions on functional deficits in terms of a "many-to-one" structure-function mapping. In this paper, we offer a principled account of degeneracy and redundancy, when function is operationalized in terms of active inference, namely, a formulation of perception and action as belief updating under generative models of the world. In brief, "degeneracy" is quantified by the "entropy" of posterior beliefs about the causes of sensations, while "redundancy" is the "complexity" cost incurred by forming those beliefs. From this perspective, degeneracy and redundancy are complementary: Active inference tries to minimize redundancy while maintaining degeneracy. This formulation is substantiated using statistical and mathematical notions of degenerate mappings and statistical efficiency. We then illustrate changes in degeneracy and redundancy during the learning of a word repetition task. Finally, we characterize the effects of lesions-to intrinsic and extrinsic connections-using in silico disconnections. These numerical analyses highlight the fundamental difference between degeneracy and redundancy-and how they score distinct imperatives for perceptual inference and structure learning that are relevant to synthetic and biological intelligence.
Collapse
Affiliation(s)
- Noor Sajid
- Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, London, WC1N 3AR, UK
| | - Thomas Parr
- Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, London, WC1N 3AR, UK
| | - Thomas M Hope
- Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, London, WC1N 3AR, UK
| | - Cathy J Price
- Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, London, WC1N 3AR, UK
| | - Karl J Friston
- Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, London, WC1N 3AR, UK
| |
Collapse
|
12
|
Higgins J, Barbieri E, Wang X, Mack J, Caplan D, Kiran S, Rapp B, Thompson C, Zinbarg R, Parrish T. Reliability of BOLD signals in chronic stroke-induced aphasia. Eur J Neurosci 2020; 52:3963-3978. [PMID: 32282965 DOI: 10.1111/ejn.14739] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 04/01/2020] [Accepted: 04/02/2020] [Indexed: 11/30/2022]
Abstract
Investigating the neurobiology of language impairment and treatment in chronic stroke aphasia using fMRI requires an understanding of measurement variability within and between participants. In this multicenter study, we evaluated the scan-rescan reliability of an auditory and visual (written) story comprehension paradigm in stroke participants with aphasia (N = 65) and healthy controls (N = 22). The multi-modal task was conducted twice (~1 week apart) on separate visits upon study enrolment and twice again at completion three months later. A non-language visuomotor task was studied in the aphasia group only, which was conducted once per time point (3 months apart). While participants were asked to make responses during the comprehension task, these in-scanner responses were not recorded. Reliability was assessed using intraclass correlation coefficient (ICC) at both group and individual participant levels. The visual story comprehension condition had higher reliability than the auditory condition in both groups, with participants with aphasia exhibiting lower reliability than controls in both conditions (stroke ICC = .43, healthy ICC = .81). Differences in reliability within the group of participants with aphasia were found to be partially explained by overall language impairment as well as greater head motion. In the participants with aphasia, the visuomotor paradigm was found to have greater reliability than the story comprehension task at equivalent interscan intervals (visuomotor = 0.50, comprehension = 0.34), and its reliability was not associated with language impairment. This work highlights the importance of considering the reliability of fMRI tasks in aphasia research, provides strategies to improve reliability and has potential implications for the field of clinical neuroimaging in general.
Collapse
Affiliation(s)
- James Higgins
- Center for the Neurobiology of Language Recovery, Northwestern University, Evanston, IL, USA.,Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Elena Barbieri
- Center for the Neurobiology of Language Recovery, Northwestern University, Evanston, IL, USA.,Department of Communication Sciences and Disorders, School of Communication, Northwestern University, Evanston, IL, USA
| | - Xue Wang
- Center for the Neurobiology of Language Recovery, Northwestern University, Evanston, IL, USA.,Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Jennifer Mack
- Center for the Neurobiology of Language Recovery, Northwestern University, Evanston, IL, USA.,Department of Communication Sciences and Disorders, School of Communication, Northwestern University, Evanston, IL, USA
| | - David Caplan
- Center for the Neurobiology of Language Recovery, Northwestern University, Evanston, IL, USA.,Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Swathi Kiran
- Center for the Neurobiology of Language Recovery, Northwestern University, Evanston, IL, USA.,Department of Speech, Language, and Hearing, College of Health & Rehabilitation, Boston University, Boston, MA, USA
| | - Brenda Rapp
- Center for the Neurobiology of Language Recovery, Northwestern University, Evanston, IL, USA.,Department of Cognitive Science, Krieger School of Arts & Sciences, Johns Hopkins University, Baltimore, MD, USA
| | - Cynthia Thompson
- Center for the Neurobiology of Language Recovery, Northwestern University, Evanston, IL, USA.,Department of Communication Sciences and Disorders, School of Communication, Northwestern University, Evanston, IL, USA.,Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Richard Zinbarg
- Center for the Neurobiology of Language Recovery, Northwestern University, Evanston, IL, USA.,Department of Psychology, Weinberg College of Arts and Sciences, Northwestern University, Evanston, IL, USA.,The Family Institute at Northwestern University, Evanston, IL, USA
| | - Todd Parrish
- Center for the Neurobiology of Language Recovery, Northwestern University, Evanston, IL, USA.,Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| |
Collapse
|
13
|
Versace V, Schwenker K, Langthaler PB, Golaszewski S, Sebastianelli L, Brigo F, Pucks-Faes E, Saltuari L, Nardone R. Facilitation of Auditory Comprehension After Theta Burst Stimulation of Wernicke's Area in Stroke Patients: A Pilot Study. Front Neurol 2020; 10:1319. [PMID: 31969857 PMCID: PMC6960103 DOI: 10.3389/fneur.2019.01319] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 11/28/2019] [Indexed: 12/27/2022] Open
Abstract
Introduction: Single-pulse transcranial magnetic stimulation (TMS) and high-frequency repetitive TMS (rTMS) over Wernicke's area were found to facilitate language functions in right-handed healthy subjects. We aimed at investigating the effects of excitatory rTMS, given as intermittent theta burst stimulation (iTBS) over left Wernicke's area, on auditory comprehension in patients suffering from fluent aphasia after stroke of the left temporal lobe. Methods: We studied 13 patients with chronic fluent aphasia after an ischemic stroke involving Wernicke's area. iTBS was applied in random order to Wernicke's area, the right-hemisphere homologous of Wernicke's area, and the primary visual cortex. Auditory comprehension was blind assessed using the Token test before (T0), 5 (T1), and 40 min (T2) after a single session of iTBS. Results: At the first evaluation (T1) after iTBS on left Wernike's area, but not on the contralateral homologous area nor on the primary visual cortex, the scores on the Token test were significantly increased. No significant effects were observed at T2. Conclusion: We demonstrated that a single session of excitatory iTBS over Wernicke's area was safe and led to a transient facilitation of auditory comprehension in chronic stroke patients with lesions in the same area. Further studies are needed to establish whether TBS-induced modulation can be enhanced and transformed into longer-lasting effects by means of repeated TBS sessions and by combining TBS with speech and language therapy.
Collapse
Affiliation(s)
- Viviana Versace
- Department of Neurorehabilitation, Hopsital of Vipiteno-Sterzing, Vipiteno-Sterzing, Italy.,Research Unit for Neurorehabilitation of South Tyrol, Bolzano, Italy
| | - Kerstin Schwenker
- Department of Neurology, Christian Doppler Klinik, Paracelsus Medical University, Salzburg, Austria.,Karl Landsteiner Institut für Neurorehabilitation und Raumfahrtneurologie, Salzburg, Austria
| | - Patrick B Langthaler
- Department of Neurology, Christian Doppler Klinik, Paracelsus Medical University, Salzburg, Austria
| | - Stefan Golaszewski
- Department of Neurology, Christian Doppler Klinik, Paracelsus Medical University, Salzburg, Austria.,Karl Landsteiner Institut für Neurorehabilitation und Raumfahrtneurologie, Salzburg, Austria
| | - Luca Sebastianelli
- Department of Neurorehabilitation, Hopsital of Vipiteno-Sterzing, Vipiteno-Sterzing, Italy.,Research Unit for Neurorehabilitation of South Tyrol, Bolzano, Italy
| | - Francesco Brigo
- Department of Neurology, Franz Tappeiner Hospital, Merano, Italy.,Department of Neuroscience, Biomedicine and Movement Science, University of Verona, Verona, Italy
| | | | - Leopold Saltuari
- Research Unit for Neurorehabilitation of South Tyrol, Bolzano, Italy.,Department of Neurology, Hochzirl Hospital, Zirl, Austria
| | - Raffaele Nardone
- Department of Neurology, Christian Doppler Klinik, Paracelsus Medical University, Salzburg, Austria.,Karl Landsteiner Institut für Neurorehabilitation und Raumfahrtneurologie, Salzburg, Austria.,Department of Neurology, Franz Tappeiner Hospital, Merano, Italy
| |
Collapse
|
14
|
Deschamps I, Baum SR, Gracco VL. Phonological processing in speech perception: What do sonority differences tell us? BRAIN AND LANGUAGE 2015; 149:77-83. [PMID: 26186232 DOI: 10.1016/j.bandl.2015.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 06/15/2015] [Accepted: 06/16/2015] [Indexed: 06/04/2023]
Abstract
Previous research has associated the inferior frontal and posterior temporal brain regions with a number of phonological processes. In order to identify how these specific brain regions contribute to phonological processing, we manipulated subsyllabic phonological complexity and stimulus modality during speech perception using fMRI. Subjects passively attended to visual or auditory pseudowords. Similar to previous studies, a bilateral network of cortical regions was recruited during the presentation of visual and auditory stimuli. Moreover, pseudowords recruited a similar network of regions as words and letters. Few regions in the whole-brain results revealed neural processing differences associated with phonological complexity independent of modality of presentation. In an ROI analysis, the only region sensitive to phonological complexity was the posterior part of the inferior frontal gyrus (IFGpo), with the complexity effect only present for print. In sum, the sensitivity of phonological brain areas depends on the modality of stimulus presentation and task demands.
Collapse
Affiliation(s)
- Isabelle Deschamps
- Centre for Research on Brain, Language and Music, Rabinovitch House, McGill University, 3640 rue de la Montagne, Montreal, Quebec H3G 2A8, Canada; Rehabilitation Department, Laval University, Quebec, QC, Canada; Centre de Recherche de l'Institut Universitaire en santé mentale de Québec, Quebec, QC, Canada.
| | - Shari R Baum
- McGill University, Faculty of Medicine, School of Communication Sciences and Disorders, 1266 Avenue des Pins, Montreal, Quebec H3G 1A8, Canada; Centre for Research on Brain, Language and Music, Rabinovitch House, McGill University, 3640 rue de la Montagne, Montreal, Quebec H3G 2A8, Canada
| | - Vincent L Gracco
- McGill University, Faculty of Medicine, School of Communication Sciences and Disorders, 1266 Avenue des Pins, Montreal, Quebec H3G 1A8, Canada; Centre for Research on Brain, Language and Music, Rabinovitch House, McGill University, 3640 rue de la Montagne, Montreal, Quebec H3G 2A8, Canada; Haskins Laboratories, 300 George St., Suite 900, New Haven, CT 06511, USA
| |
Collapse
|
15
|
Effects of transcranial direct current stimulation on naming and cortical excitability in stroke patients with aphasia. Neurosci Lett 2015; 589:115-20. [PMID: 25603474 DOI: 10.1016/j.neulet.2015.01.045] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 12/15/2014] [Accepted: 01/16/2015] [Indexed: 11/20/2022]
|
16
|
Black DF, DeLone DR, Kaufmann TJ, Fitz-Gibbon PD, Carter RE, Machulda MM, Welker KM. Retrospective Analysis of Interobserver Spatial Variability in the Localization of Broca's and Wernicke's Areas Using Three Different fMRI Language Paradigms. J Neuroimaging 2014; 25:626-33. [PMID: 25496329 DOI: 10.1111/jon.12179] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Revised: 05/29/2014] [Accepted: 07/13/2014] [Indexed: 11/28/2022] Open
Abstract
PURPOSE To determine interobserver spatial variability in language area localization using three commonly employed language tasks. MATERIALS AND METHODS With institutional review board approval, 125 fMRI time series from 50 different clinical language cases were retrospectively reviewed by three blinded readers who selected 3-dimensional points representing the perceived center of Wernicke's and Broca's areas using three language tasks (semantic decision, SD; sentence comprehension, SC; and silent word generation, WG). Point dispersion values were then calculated using the perimeter of the 3-dimensional triangle defined by the three readers' selections. RESULTS After resolving interobserver laterality disagreements, there was no difference in spatial variability between the three tasks (P = .069). The SD task had the fewest interobserver laterality disagreements (P = .028) and the SC task had fewer failed localizations for Broca's area (P = .050) and Wernicke's area (P = .013). CONCLUSION While there were no differences between interobserver spatial variability in language area localization between the three tasks, language task choice impacts the accuracy of fMRI language area identification because tasks vary in their rates of interobserver laterality disagreements and failed localizations. A combination of tasks including one with low laterality disagreements (eg, SD) and one with few failed localizations (eg, SC) may offer the best combination.
Collapse
Affiliation(s)
| | | | | | | | - Rickey E Carter
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN
| | - Mary M Machulda
- Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN
| | | |
Collapse
|
17
|
Homan P, Vermathen P, Van Swam C, Federspiel A, Boesch C, Strik W, Dierks T, Hubl D, Kreis R. Magnetic resonance spectroscopy investigations of functionally defined language areas in schizophrenia patients with and without auditory hallucinations. Neuroimage 2014; 94:23-32. [PMID: 24650602 DOI: 10.1016/j.neuroimage.2014.03.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 02/26/2014] [Accepted: 03/08/2014] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Cerebral dysfunction occurring in mental disorders can show metabolic disturbances which are limited to circumscribed brain areas. Auditory hallucinations have been shown to be related to defined cortical areas linked to specific language functions. Here, we investigated if the study of metabolic changes in auditory hallucinations requires a functional rather than an anatomical definition of their location and size to allow a reliable investigation by magnetic resonance spectroscopy (MRS). METHODS Schizophrenia patients with (AH; n=12) and without hallucinations (NH; n=8) and healthy controls (HC; n=11) underwent a verbal fluency task in functional MRI (fMRI) to functionally define Broca's and Wernicke's areas. Left and right Heschl's gyri were defined anatomically. RESULTS The mean distances in native space between the fMRI-defined regions and a corresponding anatomically defined area were 12.4±6.1 mm (range: 2.7-36.1 mm) for Broca's area and 16.8±6.2 mm (range: 4.5-26.4 mm) for Wernicke's area, respectively. Hence, the spatial variance was of similar extent as the size of the investigated regions. Splitting the investigations into a single voxel examination in the frontal brain and a spectroscopic imaging part for the more homogeneous field areas led to good spectral quality for almost all spectra. In Broca's area, there was a significant group effect (p=0.03) with lower levels of N-acetyl-aspartate (NAA) in NH compared to HC (p=0.02). There were positive associations of NAA levels in the left Heschl's gyrus with total (p=0.03) and negative (p=0.006) PANSS scores. In Broca's area, there was a negative association of myo-inositol levels with total PANSS scores (p=0.008). CONCLUSION This study supports the neurodegenerative hypothesis of schizophrenia only in a frontal region whereas the results obtained from temporal regions are in contrast to the majority of previous studies. Future research should test the hypothesis raised by this study that a functional definition of language regions is needed if neurochemical imbalances are expected to be restricted to functional foci.
Collapse
Affiliation(s)
- Philipp Homan
- Department of Psychiatric Neurophysiology, University Hospital of Psychiatry, University of Bern, Switzerland
| | - Peter Vermathen
- Unit for Magnetic Resonance Spectroscopy and Methodology, Department of Clinical Research and Institute of Diagnostic, Interventional and Pediatric Radiology, University of Bern, Switzerland
| | - Claudia Van Swam
- Department of Psychiatric Neurophysiology, University Hospital of Psychiatry, University of Bern, Switzerland
| | - Andrea Federspiel
- Department of Psychiatric Neurophysiology, University Hospital of Psychiatry, University of Bern, Switzerland
| | - Chris Boesch
- Unit for Magnetic Resonance Spectroscopy and Methodology, Department of Clinical Research and Institute of Diagnostic, Interventional and Pediatric Radiology, University of Bern, Switzerland
| | - Werner Strik
- University Hospital of Psychiatry, University of Bern, Switzerland
| | - Thomas Dierks
- Department of Psychiatric Neurophysiology, University Hospital of Psychiatry, University of Bern, Switzerland.
| | - Daniela Hubl
- Department of Psychiatric Neurophysiology, University Hospital of Psychiatry, University of Bern, Switzerland
| | - Roland Kreis
- Unit for Magnetic Resonance Spectroscopy and Methodology, Department of Clinical Research and Institute of Diagnostic, Interventional and Pediatric Radiology, University of Bern, Switzerland
| |
Collapse
|
18
|
Berthier ML, Froudist Walsh S, Dávila G, Nabrozidis A, Juárez Y Ruiz de Mier R, Gutiérrez A, De-Torres I, Ruiz-Cruces R, Alfaro F, García-Casares N. Dissociated repetition deficits in aphasia can reflect flexible interactions between left dorsal and ventral streams and gender-dimorphic architecture of the right dorsal stream. Front Hum Neurosci 2013; 7:873. [PMID: 24391569 PMCID: PMC3867969 DOI: 10.3389/fnhum.2013.00873] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 11/29/2013] [Indexed: 01/01/2023] Open
Abstract
Assessment of brain-damaged subjects presenting with dissociated repetition deficits after selective injury to either the left dorsal or ventral auditory pathways can provide further insight on their respective roles in verbal repetition. We evaluated repetition performance and its neural correlates using multimodal imaging (anatomical MRI, DTI, fMRI, and18FDG-PET) in a female patient with transcortical motor aphasia (TCMA) and in a male patient with conduction aphasia (CA) who had small contiguous but non-overlapping left perisylvian infarctions. Repetition in the TCMA patient was fully preserved except for a mild impairment in nonwords and digits, whereas the CA patient had impaired repetition of nonwords, digits and word triplet lists. Sentence repetition was impaired, but he repeated novel sentences significantly better than clichés. The TCMA patient had tissue damage and reduced metabolism in the left sensorimotor cortex and insula. DTI showed damage to the left temporo-frontal and parieto-frontal segments of the arcuate fasciculus (AF) and part of the left ventral stream together with well-developed right dorsal and ventral streams, as has been reported in more than one-third of females. The CA patient had tissue damage and reduced metabolic activity in the left temporoparietal cortex with additional metabolic decrements in the left frontal lobe. DTI showed damage to the left temporo-parietal and temporo-frontal segments of the AF, but the ventral stream was spared. The direct segment of the AF in the right hemisphere was also absent with only vestigial remains of the other dorsal subcomponents present, as is often found in males. fMRI during word and nonword repetition revealed bilateral perisylvian activation in the TCMA patient suggesting recruitment of spared segments of the left dorsal stream and right dorsal stream with propagation of signals to temporal lobe structures suggesting a compensatory reallocation of resources via the ventral streams. The CA patient showed a greater activation of these cortical areas than the TCMA patient, but these changes did not result in normal performance. Repetition of word triplet lists activated bilateral perisylvian cortices in both patients, but activation in the CA patient with very poor performance was restricted to small frontal and posterior temporal foci bilaterally. These findings suggest that dissociated repetition deficits in our cases are probably reliant on flexible interactions between left dorsal stream (spared segments, short tracts remains) and left ventral stream and on gender-dimorphic architecture of the right dorsal stream.
Collapse
Affiliation(s)
- Marcelo L Berthier
- Unit of Cognitive Neurology an Aphasia, Department of Medicine, Centro de Investigaciones Médico-Sanitarias, University of Malaga Malaga, Spain
| | - Seán Froudist Walsh
- Department of Psychosis Studies, Institute of Psychiatry, King's Health Partners, King's College London London, UK
| | - Guadalupe Dávila
- Unit of Cognitive Neurology an Aphasia, Department of Medicine, Centro de Investigaciones Médico-Sanitarias, University of Malaga Malaga, Spain ; Department of Psychobiology and Methodology of Comportamental Sciences, Faculty of Psychology, University of Malaga Malaga, Spain
| | - Alejandro Nabrozidis
- Unit of Molecular Imaging, Centro de Investigaciones Médico-Sanitarias, General Foundation of the University of Malaga Malaga, Spain
| | - Rocío Juárez Y Ruiz de Mier
- Unit of Cognitive Neurology an Aphasia, Department of Medicine, Centro de Investigaciones Médico-Sanitarias, University of Malaga Malaga, Spain
| | - Antonio Gutiérrez
- Department of Psychobiology and Methodology of Comportamental Sciences, Faculty of Psychology, University of Malaga Malaga, Spain
| | - Irene De-Torres
- Unit of Cognitive Neurology an Aphasia, Department of Medicine, Centro de Investigaciones Médico-Sanitarias, University of Malaga Malaga, Spain
| | - Rafael Ruiz-Cruces
- Unit of Cognitive Neurology an Aphasia, Department of Medicine, Centro de Investigaciones Médico-Sanitarias, University of Malaga Malaga, Spain
| | - Francisco Alfaro
- Unit of Molecular Imaging, Centro de Investigaciones Médico-Sanitarias, General Foundation of the University of Malaga Malaga, Spain
| | | |
Collapse
|
19
|
Age-related laterality shifts in auditory and attention networks with normal ageing: Effects on a working memory task. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.npbr.2013.09.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
20
|
Suppression of the µ rhythm during speech and non-speech discrimination revealed by independent component analysis: implications for sensorimotor integration in speech processing. PLoS One 2013; 8:e72024. [PMID: 23991030 PMCID: PMC3750026 DOI: 10.1371/journal.pone.0072024] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 07/11/2013] [Indexed: 01/17/2023] Open
Abstract
Background Constructivist theories propose that articulatory hypotheses about incoming phonetic targets may function to enhance perception by limiting the possibilities for sensory analysis. To provide evidence for this proposal, it is necessary to map ongoing, high-temporal resolution changes in sensorimotor activity (i.e., the sensorimotor μ rhythm) to accurate speech and non-speech discrimination performance (i.e., correct trials.) Methods Sixteen participants (15 female and 1 male) were asked to passively listen to or actively identify speech and tone-sweeps in a two-force choice discrimination task while the electroencephalograph (EEG) was recorded from 32 channels. The stimuli were presented at signal-to-noise ratios (SNRs) in which discrimination accuracy was high (i.e., 80–100%) and low SNRs producing discrimination performance at chance. EEG data were decomposed using independent component analysis and clustered across participants using principle component methods in EEGLAB. Results ICA revealed left and right sensorimotor µ components for 14/16 and 13/16 participants respectively that were identified on the basis of scalp topography, spectral peaks, and localization to the precentral and postcentral gyri. Time-frequency analysis of left and right lateralized µ component clusters revealed significant (pFDR<.05) suppression in the traditional beta frequency range (13–30 Hz) prior to, during, and following syllable discrimination trials. No significant differences from baseline were found for passive tasks. Tone conditions produced right µ beta suppression following stimulus onset only. For the left µ, significant differences in the magnitude of beta suppression were found for correct speech discrimination trials relative to chance trials following stimulus offset. Conclusions Findings are consistent with constructivist, internal model theories proposing that early forward motor models generate predictions about likely phonemic units that are then synthesized with incoming sensory cues during active as opposed to passive processing. Future directions and possible translational value for clinical populations in which sensorimotor integration may play a functional role are discussed.
Collapse
|
21
|
Wang J, Wu D, Chen Y, Yuan Y, Zhang M. Effects of transcranial direct current stimulation on language improvement and cortical activation in nonfluent variant primary progressive aphasia. Neurosci Lett 2013; 549:29-33. [PMID: 23800543 DOI: 10.1016/j.neulet.2013.06.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 06/11/2013] [Accepted: 06/13/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Jie Wang
- Department of Rehabilitation, Xuanwu Hospital of Capital Medical University, No. 45, Changchun St, Xicheng District, PO Box 100053, Beijing, China
| | | | | | | | | |
Collapse
|
22
|
A comprehensive neuropsychological mapping battery for functional magnetic resonance imaging. Int J Psychophysiol 2013; 90:215-34. [PMID: 23892066 DOI: 10.1016/j.ijpsycho.2013.07.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 07/11/2013] [Accepted: 07/15/2013] [Indexed: 01/27/2023]
Abstract
Existing batteries for FMRI do not precisely meet the criteria for comprehensive mapping of cognitive functions within minimum data acquisition times using standard scanners and head coils. The goal was to develop a battery of neuropsychological paradigms for FMRI that can also be used in other brain imaging techniques and behavioural research. Participants were 61 healthy, young adult volunteers (48 females and 13 males, mean age: 22.25 ± 3.39 years) from the university community. The battery included 8 paradigms for basic (visual, auditory, sensory-motor, emotional arousal) and complex (language, working memory, inhibition/interference control, learning) cognitive functions. Imaging was performed using standard functional imaging capabilities (1.5-T MR scanner, standard head coil). Structural and functional data series were analysed using Brain Voyager QX2.9 and Statistical Parametric Mapping-8. For basic processes, activation centres for individuals were within a distance of 3-11 mm of the group centres of the target regions and for complex cognitive processes, between 7 mm and 15 mm. Based on fixed-effect and random-effects analyses, the distance between the activation centres was 0-4 mm. There was spatial variability between individual cases; however, as shown by the distances between the centres found with fixed-effect and random-effects analyses, the coordinates for individual cases can be used to represent those of the group. The findings show that the neuropsychological brain mapping battery described here can be used in basic science studies that investigate the relationship of the brain to the mind and also as functional localiser in clinical studies for diagnosis, follow-up and pre-surgical mapping.
Collapse
|
23
|
Sun H, Zheng D, Wang X, Lu Z, Theysohn N, Forsting M, Guo Q. Functional segregation in the left premotor cortex in language processing: Evidence from fMRI. J Integr Neurosci 2013; 12:221-33. [DOI: 10.1142/s0219635213500131] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
|
24
|
Hartwigsen G, Saur D, Price CJ, Baumgaertner A, Ulmer S, Siebner HR. Increased Facilitatory Connectivity from the Pre-SMA to the Left Dorsal Premotor Cortex during Pseudoword Repetition. J Cogn Neurosci 2013; 25:580-94. [DOI: 10.1162/jocn_a_00342] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Abstract
Previous studies have demonstrated that the repetition of pseudowords engages a network of premotor areas for articulatory planning and articulation. However, it remains unclear how these premotor areas interact and drive one another during speech production. We used fMRI with dynamic causal modeling to investigate effective connectivity between premotor areas during overt repetition of words and pseudowords presented in both the auditory and visual modalities. Regions involved in phonological aspects of language production were identified as those where regional increases in the BOLD signal were common to repetition in both modalities. We thus obtained three seed regions: the bilateral pre-SMA, left dorsal premotor cortex (PMd), and left ventral premotor cortex that were used to test 63 different models of effective connectivity in the premotor network for pseudoword relative to word repetition. The optimal model was identified with Bayesian model selection and reflected a network with driving input to pre-SMA and an increase in facilitatory drive from pre-SMA to PMd during repetition of pseudowords. The task-specific increase in effective connectivity from pre-SMA to left PMd suggests that the pre-SMA plays a supervisory role in the generation and subsequent sequencing of motor plans. Diffusion tensor imaging-based fiber tracking in another group of healthy volunteers showed that the functional connection between both regions is underpinned by a direct cortico-cortical anatomical connection.
Collapse
Affiliation(s)
- Gesa Hartwigsen
- 1Christian-Albrechts-University, Kiel, Germany
- 2NeuroImage-Nord, Hamburg-Kiel-Lübeck, Germany
- 3University of Leipzig
| | | | | | - Annette Baumgaertner
- 1Christian-Albrechts-University, Kiel, Germany
- 2NeuroImage-Nord, Hamburg-Kiel-Lübeck, Germany
- 5Fresenius University of Applied Sciences, Hamburg, Germany
| | - Stephan Ulmer
- 6University Hospital of Schleswig-Holstein, Kiel, Germany
- 7University Hospital Basel
| | - Hartwig R. Siebner
- 1Christian-Albrechts-University, Kiel, Germany
- 2NeuroImage-Nord, Hamburg-Kiel-Lübeck, Germany
- 8Copenhagen University Hospital Hvidovre
| |
Collapse
|
25
|
van Dam WO, van Dongen EV, Bekkering H, Rueschemeyer SA. Context-dependent changes in functional connectivity of auditory cortices during the perception of object words. J Cogn Neurosci 2012; 24:2108-19. [PMID: 22721380 DOI: 10.1162/jocn_a_00264] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Embodied theories hold that cognitive concepts are grounded in our sensorimotor systems. Specifically, a number of behavioral and neuroimaging studies have buttressed the idea that language concepts are represented in areas involved in perception and action [Pulvermueller, F. Brain mechanisms linking language and action. Nature Reviews Neuroscience, 6, 576-582, 2005; Barsalou, L. W. Perceptual symbol systems. Behavioral and Brain Sciences, 22, 577-660, 1999]. Proponents of a strong embodied account argue that activity in perception/action areas is triggered automatically upon encountering a word and reflect static semantic representations. In contrast to what would be expected if lexical semantic representations are automatically triggered upon encountering a word, a number of studies failed to find motor-related activity for words with a putative action-semantic component [Raposo, A., Moss, H. E., Stamatakis, E. A., & Tyler, L. K. Modulation of motor and premotor cortices by actions, action words and action sentences. Neuropsychologia, 47, 388-396, 2009; Rueschemeyer, S.-A., Brass, M., & Friederici, A. D. Comprehending prehending: Neural correlates of processing verbs with motor stems. Journal of Cognitive Neuroscience, 19, 855-865, 2007]. In a recent fMRI study, Van Dam and colleagues [Van Dam, W. O., Van Dijk, M., Bekkering, H., & Rueschemeyer, S.-A. Flexibility in embodied lexical-semantic representations. Human Brain Mapping, in press] showed that the degree to which a modality-specific region contributes to a representation considerably changes as a function of context. In the current study, we presented words for which both motor and visual properties (e.g., tennis ball, boxing glove) were important in constituting the concept. Our aim was to corroborate on earlier findings of flexible and context-dependent language representations by testing whether functional integration between auditory brain regions and perception/action areas is modulated by context. Functional connectivity was investigated by means of a psychophysiological interaction analysis, in which we found that bilateral superior temporal gyrus was more strongly connected with brain regions relevant for coding action information: (1) for Action Color words vs. Abstract words, and (2) for Action Color words presented in a context that emphasized action vs. a context that emphasized color properties.
Collapse
|
26
|
Dalacorte A, Portuguez MW, Maurer das Neves CM, Anes M, DaCosta JC. Functional MRI evaluation of supplementary motor area language dominance in right- and left-handed subjects. Somatosens Mot Res 2012; 29:52-61. [DOI: 10.3109/08990220.2012.662418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
27
|
Price CJ. A review and synthesis of the first 20 years of PET and fMRI studies of heard speech, spoken language and reading. Neuroimage 2012; 62:816-47. [PMID: 22584224 PMCID: PMC3398395 DOI: 10.1016/j.neuroimage.2012.04.062] [Citation(s) in RCA: 1279] [Impact Index Per Article: 106.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Revised: 04/25/2012] [Accepted: 04/30/2012] [Indexed: 01/17/2023] Open
Abstract
The anatomy of language has been investigated with PET or fMRI for more than 20 years. Here I attempt to provide an overview of the brain areas associated with heard speech, speech production and reading. The conclusions of many hundreds of studies were considered, grouped according to the type of processing, and reported in the order that they were published. Many findings have been replicated time and time again leading to some consistent and undisputable conclusions. These are summarised in an anatomical model that indicates the location of the language areas and the most consistent functions that have been assigned to them. The implications for cognitive models of language processing are also considered. In particular, a distinction can be made between processes that are localized to specific structures (e.g. sensory and motor processing) and processes where specialisation arises in the distributed pattern of activation over many different areas that each participate in multiple functions. For example, phonological processing of heard speech is supported by the functional integration of auditory processing and articulation; and orthographic processing is supported by the functional integration of visual processing, articulation and semantics. Future studies will undoubtedly be able to improve the spatial precision with which functional regions can be dissociated but the greatest challenge will be to understand how different brain regions interact with one another in their attempts to comprehend and produce language.
Collapse
Affiliation(s)
- Cathy J Price
- Wellcome Trust Centre for Neuroimaging, UCL, London WC1N 3BG, UK.
| |
Collapse
|
28
|
Berthier ML, Lambon Ralph MA, Pujol J, Green C. Arcuate fasciculus variability and repetition: The left sometimes can be right. Cortex 2012; 48:133-43. [DOI: 10.1016/j.cortex.2011.06.014] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Revised: 06/01/2011] [Accepted: 06/14/2011] [Indexed: 11/24/2022]
|
29
|
Nuñez SC, Dapretto M, Katzir T, Starr A, Bramen J, Kan E, Bookheimer S, Sowell ER. fMRI of syntactic processing in typically developing children: structural correlates in the inferior frontal gyrus. Dev Cogn Neurosci 2011; 1:313-23. [PMID: 21743820 PMCID: PMC3129989 DOI: 10.1016/j.dcn.2011.02.004] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Development of syntactic processing was examined to evaluate maturational processes including left language lateralization functions and increased specialization of brain regions important for syntactic processing. We utilized multimodal methods, including indices of brain activity from fMRI during a syntactic processing task, cortical thickness measurements from structural MRI, and neuropsychological measures. To evaluate hypotheses about increasing lateralization and specialization with development, we examined relationships between cortical thickness and magnitude and spatial activation extent within the left inferior frontal gyrus (IFG) and its right hemisphere homologue. We predicted that increased activation in the left and decreased activation in the right IFG would be associated with increased syntactic proficiency. As predicted, a more mature pattern of increased thickness in the right pars triangularis was associated with decreased activation intensity and extent in the right IFG. These findings suggest a maturational shift towards decreased involvement of the right IFG for syntactic processing. Better syntactic skills were associated with increased activation in the left IFG independent from age, suggesting increased specialization of the left IFG with increased proficiency. Overall, our findings show relationships between structural and functional neurodevelopment that co-occur with improved syntactic processing in critical language regions of the IFG in typically developing children.
Collapse
Affiliation(s)
- S Christopher Nuñez
- Developmental Cognitive Neuroimaging Laboratory, Department of Neurology, University of California, Los Angeles, Los Angeles, California 90095-1769, USA
| | | | | | | | | | | | | | | |
Collapse
|
30
|
Moore-Parks EN, Burns EL, Bazzill R, Levy S, Posada V, Müller RA. An fMRI study of sentence-embedded lexical-semantic decision in children and adults. BRAIN AND LANGUAGE 2010; 114:90-100. [PMID: 20627366 PMCID: PMC3630793 DOI: 10.1016/j.bandl.2010.03.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Revised: 03/26/2010] [Accepted: 03/29/2010] [Indexed: 05/29/2023]
Abstract
Lexical-semantic knowledge is a core language component that undergoes prolonged development throughout childhood and is therefore highly amenable to developmental studies. Most previous lexical-semantic functional MRI (fMRI) studies have been limited to single-word or word-pair tasks, outside a sentence context. Our objective was to investigate the development of lexical-semantic language networks in typically developing children using a more 'ecological' sentence-embedded semantic task that permitted performance monitoring while minimizing head movement by avoiding overt speech. Sixteen adults and 23 children completed two fMRI runs of an auditory lexical-semantic decision task with a button-press response, using reverse speech as control condition. Children and adults showed similar activation in bilateral temporal and left inferior frontal regions. Greater activation in adults than in children was seen in left inferior parietal, premotor, and inferior frontal regions, and in bilateral supplementary motor area (SMA). Specifically for semantically incongruous sentences, adults also showed greater activation than children in left inferior frontal cortex, possibly related to enhanced 'top-down' control. Age-dependent activation increases in motor-related regions were shown to be unrelated to overt motor responses, but could be associated with covert speech accompanying semantic decision. Unlike previous studies, age-dependent differences were not detected in posterior sensory cortices (such as extrastriate cortex), nor in middle temporal gyrus.
Collapse
Affiliation(s)
- Erin Nicole Moore-Parks
- Brain Development Imaging Laboratory, Department of Psychology, San Diego State University, San Diego, California
- Joint Doctoral Program in Clinical Psychology, San Diego State University and University of California, San Diego
| | - Erin L. Burns
- Brain Development Imaging Laboratory, Department of Psychology, San Diego State University, San Diego, California
| | - Rebecca Bazzill
- Brain Development Imaging Laboratory, Department of Psychology, San Diego State University, San Diego, California
| | - Sarah Levy
- Brain Development Imaging Laboratory, Department of Psychology, San Diego State University, San Diego, California
| | - Valerie Posada
- Brain Development Imaging Laboratory, Department of Psychology, San Diego State University, San Diego, California
| | - Ralph-Axel Müller
- Brain Development Imaging Laboratory, Department of Psychology, San Diego State University, San Diego, California
- Department of Cognitive Science, University of California, San Diego
| |
Collapse
|
31
|
Rosenberger LR, Zeck J, Berl MM, Moore EN, Ritzl EK, Shamim S, Weinstein SL, Conry JA, Pearl PL, Sato S, Vezina LG, Theodore WH, Gaillard WD. Interhemispheric and intrahemispheric language reorganization in complex partial epilepsy. Neurology 2009; 72:1830-6. [PMID: 19470965 DOI: 10.1212/wnl.0b013e3181a7114b] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To investigate interhemispheric and intrahemispheric reorganization in patients with localization-related epilepsy. METHOD We studied 50 patients with a left hemispheric focus and 20 normal right-handed controls with a 3T echoplanar imaging blood oxygen level dependent functional MRI auditory-based word definition decision task. Data were analyzed using SPM 2. Using region of interest for Broca and Wernicke areas and an asymmetry index (AI), patients were categorized as left language (LL; AI > or = 0.20) or atypical language (AL; AI <0.20) for region. The point maxima activation for normal controls (p <0.05 corrected FDR) was identified in Broca and midtemporal regions and then used as a point of reference for individual point maxima identified at p < 0.001, uncorrected. RESULTS Patient groups showed increased frequency of having activation in right homologues. Activation in AL groups occurred in homologous right regions; distances for point maxima activation in homologous regions were the same as point maxima distances in normal control activation in left regions. Distances for LL patient in left regions showed a trend for differences for midtemporal gyrus (6 mm posterior, 3 mm superior) but variability around mean difference distance was significant. There was no effect of age at epilepsy onset, duration, or pathology on activation maxima. CONCLUSIONS Right hemisphere language regions in patients with left hemispheric focus are homologues of left hemisphere Broca and broadly defined Wernicke areas. We found little evidence for intrahemispheric reorganization in patients with left hemisphere epilepsy who remain left language dominant by these methods.
Collapse
Affiliation(s)
- L R Rosenberger
- Department of Neuroscience, Children's National Medical Center, 111 Michigan Ave. NW, Washington, DC 20010, USA
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Burton MW, Krebs-Noble D, Gullapalli RP, Berndt RS. Functional neuroimaging of grammatical class: Ambiguous and unambiguous nouns and verbs. Cogn Neuropsychol 2009; 26:148-71. [DOI: 10.1080/02643290802536090] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
33
|
Abstract
O cerebelo era tradicionalmente visto como um órgão coordenador da motricidade, entretanto é atualmente considerado como um importante centro de integração de sensibilidades e coordenação de várias fases do processo cognitivo. OBJETIVO: é sistematizar as informações da literatura quanto à participação do cerebelo na percepção auditiva. MÉTODOS: foram selecionados na literatura trabalhos em animais sobre a fisiologia e anatomia das vias auditivas do cerebelo, além de trabalhos em humanos sobre diversas funções do cerebelo na percepção auditiva. Foram discutidos os achados da literatura, que há evidências que o cerebelo participa das seguintes funções cognitivas relacionadas à audição: geração verbal; processamento auditivo; atenção auditiva; memória auditiva; raciocínio abstrato; timing; solução de problemas; discriminação sensorial; informação sensorial; processamento da linguagem; operações lingüísticas. CONCLUSÃO: Foi constatado que são incompletas as informações sobre as estruturas, funções e vias auditivas do cerebelo.
Collapse
|
34
|
Kraut MA, Cherry B, Pitcock JA, Anand R, Li J, Vestal L, Henderson VW, Hart J. The Semantic Object Retrieval Test (SORT) in Amnestic Mild Cognitive Impairment. Cogn Behav Neurol 2007; 20:62-7. [PMID: 17356346 DOI: 10.1097/wnn.0b013e3180335f7d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Between 10% and 15% of patients with the amnestic variety of Mild Cognitive Impairment (MCI) convert to Alzheimer disease (AD) per year. OBJECTIVE Characterize cognitive markers that may herald conversion from MCI to AD and directly assess semantic memory in patients meeting criteria for amnestic MCI. DESIGN Thirty-five amnestic MCI patients and 121 healthy aging controls enrolled at an Alzheimer Disease Center received a battery of standard neuropsychologic tests, and the Semantic Object Retrieval Test (SORT), a test that we have developed for the assessment of semantic memory and subsequent name production, and that has been shown to be able to differentiate between normals and patients with AD. RESULTS On the basis of normative data from the SORT, the MCI subjects could be divided into 2 groups: 10 patients (29%) with a significant semantic impairment (SI+) and 25 without a semantic memory deficit (SI-). There was a significant correlation between all SORT variables and performance on the Boston Naming Test. In this MCI population, significantly impaired SORT performance was associated with a relative decrease in performance on tests of frontal lobe functions, although disruption of thalamic-related processes cannot be excluded as an etiology for semantic memory impairment. CONCLUSIONS The SORT is a specific test of semantic memory, and is a sensitive measure of semantic memory deficits in patients who otherwise meet criteria for amnestic MCI. Using this specific assessment tool, a significant number of MCI patients were found to have semantic memory deficits. As these patients may be early in the course of possible progression toward dementia, the SORT or other tests of semantic memory may provide important diagnostic or prognostic information in patients with MCI.
Collapse
Affiliation(s)
- Michael A Kraut
- Department of Radiology, Division of Neuroradiology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | | | | | | | | | | | | | | |
Collapse
|
35
|
Sens PM, de Almeida CIR. Participation of the Cerebellum in Auditory Processing. Braz J Otorhinolaryngol 2007; 73:266-70. [PMID: 17589737 PMCID: PMC9452195 DOI: 10.1016/s1808-8694(15)31076-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2005] [Accepted: 06/16/2006] [Indexed: 11/19/2022] Open
Abstract
UNLABELLED The cerebellum, traditionally conceived as a controlling organ of motricity, it is today considered an all-important integration center for both sensitivity and coordination of the various phases of the cognitive process. AIM This paper aims at gather and sort literature information on the cerebellums role in the auditory perception. METHODS We have selected animal studies of both the physiology and the anatomy of the cerebellum auditory pathway, as well as papers on humans discussing several functions of the cerebellum in auditory perception. As for the literature, it has been discussed and concluded that there is evidence that the cerebellum participates in many cognitive functions related to hearing: speech generation, auditory processing, auditory memory, abstract reasoning, timing, solution of problems, sensorial discrimination, sensorial information, language processing, and linguistic operations. CONCLUSION It has been reported that all information about cerebellum structure, functions and auditory pathways is incomplete.
Collapse
|
36
|
Miller MB, Van Horn JD. Individual variability in brain activations associated with episodic retrieval: A role for large-scale databases. Int J Psychophysiol 2007; 63:205-13. [PMID: 16806546 DOI: 10.1016/j.ijpsycho.2006.03.019] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2006] [Revised: 03/01/2006] [Accepted: 03/30/2006] [Indexed: 10/24/2022]
Abstract
The localization of brain functions using neuroimaging techniques is commonly dependent on statistical analyses of groups of subjects in order to identify sites of activation, particularly in studies of episodic memory. Exclusive reliance on group analysis may be to the detriment of understanding the true underlying cognitive nature of brain activations. In this overview, we found that the patterns of brain activity associated with episodic retrieval are very distinct for individual subjects from the patterns of brain activity at the group level. These differences appear to go beyond the relatively small variations due to cyctoarchitectonic differences or spatial normalization. We review evidence that individual patterns of brain activity vary widely across subjects and are reliable over time despite extensive variability. We suggest that varied but reliable individual patterns of significant brain activity may be indicative of different cognitive strategies used to produce a recognition response. We argue that individual analyses in conjunction with group analyses are likely to be critical in fully understanding the relationship between retrieval processes and underlying neural systems.
Collapse
Affiliation(s)
- Michael B Miller
- Department of Psychology, University of California, Santa Barbara, CA, USA
| | | |
Collapse
|
37
|
Richards TL, Aylward EH, Field KM, Grimme AC, Raskind W, Richards AL, Nagy W, Eckert M, Leonard C, Abbott RD, Berninger VW. Converging evidence for triple word form theory in children with dyslexia. Dev Neuropsychol 2006; 30:547-89. [PMID: 16925475 DOI: 10.1207/s15326942dn3001_3] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
This article has 3 parts. The 1st part provides an overview of the family genetics, brain imaging, and treatment research in the University of Washington Multidisciplinary Learning Disabilities Center (UWLDC) over the past decade that points to a probable genetic basis for the unusual difficulty that individuals with dyslexia encounter in learning to read and spell. Phenotyping studies have found evidence that phonological, orthographic, and morphological word forms and their parts may contribute uniquely to this difficulty. At the same time, reviews of treatment studies in the UWLDC (which focused on children in Grades 4 to 6) and other research centers provide evidence for the plasticity of the brain in individuals with dyslexia. The 2nd part reports 4 sets of results that extend previously published findings based on group analyses to those based on analyses of individual brains and that support triple word form awareness and mapping theory: (a) distinct brain signatures for the phonological, morphological, and orthographic word forms; (b) crossover effects between phonological and morphological treatments and functional magentic resonance imaging (fMRI) tasks in response to instruction, suggestive of cross-word form computational and mapping processes; (c) crossover effects between behavioral measures of phonology or morphology and changes in fMRI activation following treatment; and (d) change in the relationship between structural MRI and functional magnetic resonance spectroscopy (fMRS) lactate activation in right and left inferior frontal gyri following treatment emphasizing the phonological, morphological, and orthographic word forms. In the 3rd part we discuss the next steps in this programmatic research to move beyond word form alone.
Collapse
Affiliation(s)
- Todd L Richards
- Department of Radiology, University of Washington, Seattle, WA 98195, USA.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Wirkowski E, Echausse N, Overby C, Ortiz O, Radler L. I can hear you yet cannot comprehend: a case of pure word deafness. J Emerg Med 2006; 30:53-5. [PMID: 16434336 DOI: 10.1016/j.jemermed.2005.03.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2003] [Revised: 01/19/2005] [Accepted: 03/18/2005] [Indexed: 11/27/2022]
Abstract
This report describes a 25-year-old man with acute head trauma and brain damage resulting in pure word deafness. Bilateral temporal lobe pathology was confirmed by brain imaging and functional brain studies. A brief discussion about the difference between pure word deafness and other aphasias, as well as anatomic correlation is provided.
Collapse
Affiliation(s)
- Ela Wirkowski
- Neuro Intensive Care Unit, Winthrop University Hospital, Mineola, New York 11501, USA
| | | | | | | | | |
Collapse
|
39
|
Freitag CM, Kleser C, von Gontard A, von Gontardf A. Imitation and language abilities in adolescents with Autism Spectrum Disorder without language delay. Eur Child Adolesc Psychiatry 2006; 15:282-91. [PMID: 16554960 DOI: 10.1007/s00787-006-0533-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/06/2006] [Indexed: 10/24/2022]
Abstract
INTRODUCTION Difficulties imitating gestures have been found in several studies in children and adolescents with Autism Spectrum Disorders (ASD). It has been hypothesized that imitation abilities might be precursors of language abilities in young children with autism. No study on imitation and language abilities in adolescents with ASD has been performed to date. METHODS Fifteen male adolescents with ASD, 16 male and 13 female controls were compared regarding imitation abilities of upper and lower facial movements, and language skills as assessed by the pragmatic rating scale and the Aachen Aphasia test (AAT). RESULTS Autism Spectrum Disorder subjects showed reduced imitation abilities of facial movements and non-meaningful combined hand-and-finger gestures. Regarding language, ASD subjects showed difficulties in AAT spontaneous speech measures and reduced pragmatic language abilities. Correlations of imitation and language measures differed between ASD, male and female controls. CONCLUSION The weak and differential correlations of imitation and language measures in the three comparison groups might imply a differential organization of language and imitation networks in the three comparison groups. Pragmatic abilities, which are a central feature in ASD, were not related to imitation abilities. Therefore, imitation and language abilities in ASD might not be as closely correlated as previously expected.
Collapse
Affiliation(s)
- Christine M Freitag
- Dept. of Child and Adolescent Psychiatry, Saarland University Hospital, 66421 Homburg, Saar, Germany.
| | | | | | | |
Collapse
|
40
|
Koeda M, Takahashi H, Yahata N, Matsuura M, Asai K, Okubo Y, Tanaka H. Language processing and human voice perception in schizophrenia: a functional magnetic resonance imaging study. Biol Psychiatry 2006; 59:948-57. [PMID: 16616721 DOI: 10.1016/j.biopsych.2006.01.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2005] [Revised: 01/06/2006] [Accepted: 01/13/2006] [Indexed: 11/28/2022]
Abstract
BACKGROUND Neuroimaging studies have demonstrated either reduced left-lateralized activation or reversed language dominance in schizophrenia. These findings of left hemispheric dysfunction could be attributed to language processing tasks, which activate mainly left hemispheric function. Recent functional magnetic resonance imaging studies reported right-lateralized temporal activation by human voice perception, but few studies have investigated activation by human voice in schizophrenia. We aimed to clarify the cerebral function of language processing in schizophrenia patients by considering cerebral activation of human voice perception. METHODS Fourteen right-handed schizophrenia patients and 14 right-handed controls with matched handedness, sex, and education level were scanned by functional magnetic resonance imaging while listening to sentences (SEN), reverse sentences (rSEN), and identifiable non-vocal sounds (SND). RESULTS Under the SEN-SND and SEN-rSEN contrasts including language processing, patients showed less activation of the left hemisphere than controls in the language-related fronto-tempo-parietal region, hippocampus, thalamus and cingulate gyrus. Under the rSEN-SND contrast including human voice perception, patients showed less activation than controls in the right-lateralized temporal cortices and bilateral posterior cingulate. CONCLUSIONS Our results indicate that schizophrenia patients have impairment of broader bilateral cortical-subcortical regions related to both the semantic network in the left hemisphere and the voice-specific network in the right hemisphere.
Collapse
Affiliation(s)
- Michihiko Koeda
- Department of Bioinformatics, Medical Research Institute, Tokyo, Japan
| | | | | | | | | | | | | |
Collapse
|
41
|
Alario FX, Chainay H, Lehericy S, Cohen L. The role of the supplementary motor area (SMA) in word production. Brain Res 2006; 1076:129-43. [PMID: 16480694 DOI: 10.1016/j.brainres.2005.11.104] [Citation(s) in RCA: 236] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2005] [Revised: 11/17/2005] [Accepted: 11/18/2005] [Indexed: 12/01/2022]
Abstract
The supplementary motor area (SMA) is a key structure for behavioral planning and execution. Recent research on motor control conducted with monkeys and humans has put to light an anatomical and functional distinction between pre-SMA and SMA-proper. According to this view, the pre-SMA would be involved in higher level processes while the SMA-proper would be more closely tied to motor output. We extended this general framework to the verbal domain, in order to investigate the role of the SMA in speech production. We conducted two speech production experiments with fMRI where we manipulated parameters such as familiarity, complexity or constraints on word selection. The results reveal a parcellation of the SMA into three distinct regions, according to their involvement in different aspects of word production. More specifically, following a rostrocaudal gradient, we observed differential activations related to lexical selection, linear sequence encoding and control of motor output. A parallel organization was observed in the dorsolateral frontal cortex. By refining its anatomical and functional parcellation, these results clarify the roles of the SMA in speech production.
Collapse
Affiliation(s)
- F-Xavier Alario
- Laboratoire de Psychologie Cognitive, CNRS and Université de Provence, Marseille, France.
| | | | | | | |
Collapse
|
42
|
Andoh J, Artiges E, Pallier C, Rivière D, Mangin JF, Cachia A, Plaze M, Paillère-Martinot ML, Martinot JL. Modulation of language areas with functional MR image-guided magnetic stimulation. Neuroimage 2006; 29:619-27. [PMID: 16168674 DOI: 10.1016/j.neuroimage.2005.07.029] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2005] [Revised: 07/11/2005] [Accepted: 07/18/2005] [Indexed: 11/21/2022] Open
Abstract
Repetitive transcranial magnetic stimulation (rTMS) can interfere with linguistic performance when delivered over language areas. At low frequency (1 Hz), rTMS is assumed to decrease cortical excitability; however, the degree of TMS effect on cortical language areas may depend on the localization of the stimulation coil with respect to the inter-individual anatomo-functional variations. Hence, we aimed at investigating individual brain areas involved in semantic and phonological auditory processes. We hypothesized that active rTMS targeted over Wernicke's area might modify the performance during a language-fragment-detection task. Sentences in native or foreign languages were presented to 12 right-handed male healthy volunteers during functional magnetic resonance imaging (fMRI). 3D-functional maps localized the posterior temporal activation (Wernicke) in each subject and MRI anatomical cortical landmarks were used to define Broca's pars opercularis (F3Op). A frameless stereotaxy system was used to guide the TMS coil position over Wernicke's and F3Op areas in each subject. Active and placebo randomized rTMS sessions were applied at 1 Hz, 110% of motor threshold, during the same language-fragment-detection task. Accuracy and response time (RT) were recorded. RT was significantly decreased by active rTMS compared to placebo over Wernicke's area, and was more decreased for native than for foreign languages. No significant RT change was observed for F3Op area. rTMS conditions did not impair participants' accuracy. Thus, low-frequency rTMS over Wernicke's area can speed-up the response to a task tapping on native language perception in healthy volunteers. This individually-guided stimulation study confirms that facilitatory effects are not confined to high-frequency rTMS.
Collapse
Affiliation(s)
- J Andoh
- INSERM-CEA Research Unit ERM 02-05, National Institute for Health and Medical Research, INSERM and Atomic Energy Commission, CEA, IFR49, Frédéric Joliot hospital department, 4 place Gl. Leclerc, 91401 Orsay, Paris Descartes University, France
| | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Martin PI, Naeser MA, Doron KW, Bogdan A, Baker EH, Kurland J, Renshaw P, Yurgelun-Todd D. Overt naming in aphasia studied with a functional MRI hemodynamic delay design. Neuroimage 2005; 28:194-204. [PMID: 16009568 DOI: 10.1016/j.neuroimage.2005.05.037] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2005] [Revised: 05/16/2005] [Accepted: 05/18/2005] [Indexed: 11/19/2022] Open
Abstract
The purpose of this study was to develop a functional MRI method to examine overt speech in stroke patients with aphasia. An fMRI block design for overt picture naming was utilized which took advantage of the hemodynamic response delay where increased blood flow remains for 4-8 s after the task [(Friston, K.J., Jezzard, P., Turner, R., 1994. Analysis of functional MRI time-series. Hum. Brain Mapp. 1, 153-171)]. This allowed task-related information to be obtained after the task, minimizing motion artifact from overt speech (Eden, G.F., Joseph, J., Brown, H.E., Brown, C.P., Zeffiro, T.A., 1999. Utilizing hemodynamic delay and dispersion to detect fMRI signal change without auditory interference: the behavior interleaved gradients technique. Magn. Reson. Med. 41, 13-20; Birn, RM., Bandettini, P.A., Cox, R.W., Shaker, R., 1999. Event-related fMRI of tasks involving brief motion. Hum. Brain Mapp. 7, 106-114; Birn, R.M., Cox, R.W., Bandettini, P.A., 2004. Experimental designs and processing strategies for fMRI studies involving overt verbal responses. NeuroImage 23, 1046-1058). Five chronic aphasia patients participated (4 mild-moderate and 1 severe nonfluent/global). The four mild-moderate patients who correctly named 88-100% of the pictures during fMRI, had a greater number of suprathreshold voxels in L supplementary motor area (SMA) than R SMA (P < 0.07). Three of these four mild-moderate patients showed activation in R BA 45 and/or 44; along with L temporal and/or parietal regions. The severe patient, who named no pictures, activated almost twice as many voxels in R SMA than L SMA. He also showed activation in R BA 44, but had remarkably extensive L and R temporal activation. His poor naming and widespread temporal activation may reflect poor modulation of the bi-hemispheric neural network for naming. Results indicate that this fMRI block design utilizing hemodynamic response delay can be used to study overt naming in aphasia patients, including those with mild-moderate or severe aphasia. This method permitted verification that the patients were cooperating with the task during fMRI. It has application for future fMRI studies of overt speech in aphasia.
Collapse
Affiliation(s)
- Paula I Martin
- Harold Goodglass Boston University Aphasia Research Center, Department of Neurology, Boston University School of Medicine, MA 02130, USA.
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Breier JI, Castillo EM, Boake C, Billingsley R, Maher L, Francisco G, Papanicolaou AC. Spatiotemporal patterns of language-specific brain activity in patients with chronic aphasia after stroke using magnetoencephalography. Neuroimage 2005; 23:1308-16. [PMID: 15589095 DOI: 10.1016/j.neuroimage.2004.07.069] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2004] [Revised: 05/06/2004] [Accepted: 07/29/2004] [Indexed: 11/19/2022] Open
Abstract
Six participants with chronic aphasia secondary to first-ever ischemic stroke within the middle cerebral artery (MCA) distribution of the left hemisphere and six neurologically intact controls of similar age were given a running recognition memory task for words while the magnetic flux normal to the scalp surface was measured with a whole-head neuromagnetometer. This task had been previously shown to be valid for the localization and lateralization of brain activity specific to receptive language function. As expected, patients exhibited relatively decreased activation in areas known to be involved in receptive language function, including superior temporal gyrus (STG) in the left hemisphere, as well as increased activation of areas outside of the left STG that might potentially support language function. Decreased activation within left STG was associated with a reduction in receptive language in patients, as was increased activation outside of left STG. Results support hypotheses suggesting that peri-lesional areas outside premorbid language areas may assume receptive language function after aphasia secondary to stroke, but that better recovery occurs when putative premorbid language areas are able to normalize.
Collapse
Affiliation(s)
- Joshua I Breier
- Department of Neurosurgery, Division of Clinical Neurosciences, Vivian L. Smith Center for Neurologic Research, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
| | | | | | | | | | | | | |
Collapse
|
45
|
Seghier ML, Lazeyras F, Pegna AJ, Annoni J, Zimine I, Mayer E, Michel CM, Khateb A. Variability of fMRI activation during a phonological and semantic language task in healthy subjects. Hum Brain Mapp 2004; 23:140-55. [PMID: 15449358 PMCID: PMC6871802 DOI: 10.1002/hbm.20053] [Citation(s) in RCA: 149] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Assessing inter-individual variability of functional activations is of practical importance in the use of functional magnetic resonance imaging (fMRI) in a clinical context. In this fMRI study we addressed this issue in 30 right-handed, healthy subjects using rhyme detection (phonologic) and semantic categorization tasks. Significant activations, found mainly in the left hemisphere, concerned the inferior frontal gyrus, the superior/middle temporal gyri, the prefrontal cortex, the inferior parietal lobe, the superior parietal lobule/superior occipital gyrus, the pre-central gyrus, and the supplementary motor area. Intensity/spatial analysis comparing activations in both tasks revealed an increased involvement of frontal regions in the semantic task and of temporo-parietal regions in the phonologic task. The frequency of activation analyzed in nine regional subdivisions revealed a high inter-subject variability but showed that the most frequently activated regions were the inferior frontal gyrus and the prefrontal cortex. Laterality indices, strongly lateralizing in both tasks, were slightly higher in the semantic (0.76 +/- 0.19) than the phonologic task (0.66 +/- 0.27). Frontal dominance indices (a measure of frontal vs. posterior left hemisphere dominance) indicated more robust frontal activations in the semantic than the phonologic task. Our study allowed the characterization of the most frequently involved foci in two language tasks and showed that the combination of these tasks constitutes a suitable tool for determining language lateralization and for mapping major language areas.
Collapse
Affiliation(s)
- Mohamed L. Seghier
- Department of Radiology, Geneva University Hospital, Geneva, Switzerland
- Plurifaculty Program of Cognitive Neuroscience, University of Geneva, Geneva, Switzerland
| | - François Lazeyras
- Department of Radiology, Geneva University Hospital, Geneva, Switzerland
| | - Alan J. Pegna
- Neuropsychology Unit, Department of Neurology, Geneva University Hospital, Geneva, Switzerland
- Functional Brain Mapping Laboratory, Department of Neurology, Geneva University Hospital, Geneva, Switzerland
| | - Jean‐Marie Annoni
- Neuropsychology Unit, Department of Neurology, Geneva University Hospital, Geneva, Switzerland
| | - Ivan Zimine
- Department of Radiology, Geneva University Hospital, Geneva, Switzerland
| | - Eugène Mayer
- Neuropsychology Unit, Department of Neurology, Geneva University Hospital, Geneva, Switzerland
| | - Christoph M. Michel
- Functional Brain Mapping Laboratory, Department of Neurology, Geneva University Hospital, Geneva, Switzerland
| | - Asaid Khateb
- Neuropsychology Unit, Department of Neurology, Geneva University Hospital, Geneva, Switzerland
- Functional Brain Mapping Laboratory, Department of Neurology, Geneva University Hospital, Geneva, Switzerland
| |
Collapse
|
46
|
Kesler SR, Haberecht MF, Menon V, Warsofsky IS, Dyer-Friedman J, Neely EK, Reiss AL. Functional neuroanatomy of spatial orientation processing in Turner syndrome. ACTA ACUST UNITED AC 2004; 14:174-80. [PMID: 14704214 PMCID: PMC3061620 DOI: 10.1093/cercor/bhg116] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Turner syndrome (TS), a neurogenetic disorder characterized by the absence of one X chromosome in a phenotypic female, is frequently associated with visuospatial impairments. We investigated the neural mechanisms underlying deficits in spatial orientation processing in TS. Thirteen subjects with TS and 13 age-matched typically developing controls underwent neuropsychological assessments and were scanned using functional MRI while they performed easy and difficult versions of a judgment of line orientation (JLO) task. Controls and subjects with TS activated parietal-occipital regions involved in spatial orientation during the JLO task. However, activation was significantly less in the TS group. Control subjects responded to increased task difficulty by recruiting executive frontal areas whereas subjects with TS did not activate alternate brain regions to meet increased task demands. Subjects with TS demonstrate activation deficits in parietal-occipital and frontal areas during the JLO task. Activation, and possibly deactivation, deficits in these areas may be responsible for the visuospatial deficits observed in females with TS.
Collapse
Affiliation(s)
- Shelli R Kesler
- Department of Psychiatry and Behavioral Science, Stanford University School of Medicine, Stanford, CA 94305, USA.
| | | | | | | | | | | | | |
Collapse
|
47
|
Kesler SR, Blasey CM, Brown WE, Yankowitz J, Zeng SM, Bender BG, Reiss AL. Effects of X-monosomy and X-linked imprinting on superior temporal gyrus morphology in Turner syndrome. Biol Psychiatry 2003; 54:636-46. [PMID: 13129659 PMCID: PMC3061621 DOI: 10.1016/s0006-3223(03)00289-0] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND Turner syndrome (TS) results from complete or partial monosomy X. The cognitive phenotype of TS involves preservation of verbal skills with visuospatial functioning deficits. The superior temporal gyrus (STG), which is involved in language capacities, has not been investigated in TS. METHODS The STG was measured in 30 female subjects (mean age = 14.73 +/- 6.41; range = 7.56-33.30) with TS and 30 age-matched control subjects (mean age = 14.63 +/- 5.90; range = 6.35-32.65) using volumetric magnetic resonance imaging analyses. RESULTS -Right STG, including both gray and white matter volumes, was significantly larger in TS compared with control subjects. Overall left STG volume was not significantly different between groups, although left white matter volume was increased in the TS subjects. The TS subgroup with a maternally derived X chromosome (Xm) demonstrated more aberrant STG volumes compared with subjects with a paternally (Xp) derived X and control subjects. The difference in STG volumes between Xm and control subjects involved both white and gray matter. The Xm subjects differed from Xp subjects only in terms of gray matter. CONCLUSIONS These findings suggest that X-monosomy and X-linked imprinting negatively affect STG development, possibly by disrupting neural pruning mechanisms.
Collapse
Affiliation(s)
- Shelli R Kesler
- Stanford Psychiatry Neuroimaging Laboratory, Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, California 94305-5719, USA
| | | | | | | | | | | | | |
Collapse
|
48
|
Santi A, Servos P, Vatikiotis-Bateson E, Kuratate T, Munhall K. Perceiving Biological Motion: Dissociating Visible Speech from Walking. J Cogn Neurosci 2003; 15:800-9. [PMID: 14511533 DOI: 10.1162/089892903322370726] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Abstract
Neuropsychological research suggests that the neural system underlying visible speech on the basis of kinematics is distinct from the system underlying visible speech of static images of the face and identifying whole-body actions from kinematics alone. Functional magnetic resonance imaging was used to identify the neural systems underlying point-light visible speech, as well as perception of a walking/jumping point-light body, to determine if they are independent. Although both point-light stimuli produced overlapping activation in the right middle occipital gyrus encompassing area KO and the right inferior temporal gyrus, they also activated distinct areas. Perception of walking biological motion activated a medial occipital area along the lingual gyrus close to the cuneus border, and the ventromedial frontal cortex, neither of which was activated by visible speech biological motion. In contrast, perception of visible speech biological motion activated right V5 and a network of motor-related areas (Broca's area, PM, M1, and supplementary motor area (SMA)), none of which were activated by walking biological motion. Many of the areas activated by seeing visible speech biological motion are similar to those activated while speechreading from an actual face, with the exception of M1 and medial SMA. The motor-related areas found to be active during point-light visible speech are consistent with recent work characterizing the human “mirror” system (Rizzolatti, Fadiga, Gallese, & Fogassi, 1996).
Collapse
|
49
|
Heim S, Opitz B, Müller K, Friederici AD. Phonological processing during language production: fMRI evidence for a shared production-comprehension network. BRAIN RESEARCH. COGNITIVE BRAIN RESEARCH 2003; 16:285-96. [PMID: 12668238 DOI: 10.1016/s0926-6410(02)00284-7] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Studies of phonological processes during language comprehension consistently report activation of the superior portion of Broca's area. In the domain of language production, however, there is no unequivocal evidence for the contribution of Broca's area to phonological processing. The present event-related fMRI study investigated the existence of a common neural network for phonological decisions in comprehension and production by using production tasks most comparable to those previously used in comprehension. Subjects performed two decision tasks on the initial phoneme of German picture names (/b/ or not? Vowel or not?). A semantic decision task served as a baseline for both phonological tasks. The contrasts between each phonological task and the semantic task were calculated, and a conjunction analysis was performed. There was significant activation in the superior portion of Broca's area (Brodmann's area (BA) 44) in the conjunction analysis, also present in each single contrast. In addition, further left frontal (BA 45/46) and temporal (posterior superior temporal gyrus) areas known to support phonological processing in both production and comprehension were activated. The results suggest the existence of a shared fronto-temporal neural network engaged in the processing of phonological information in both perception and production.
Collapse
Affiliation(s)
- St Heim
- Max Planck Institute of Cognitive Neuroscience, PO Box 500 355, 04303 Leipzig, Germany.
| | | | | | | |
Collapse
|
50
|
Miller MB, Van Horn JD, Wolford GL, Handy TC, Valsangkar-Smyth M, Inati S, Grafton S, Gazzaniga MS. Extensive individual differences in brain activations associated with episodic retrieval are reliable over time. J Cogn Neurosci 2002; 14:1200-14. [PMID: 12495526 DOI: 10.1162/089892902760807203] [Citation(s) in RCA: 124] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The localization of brain functions using neuroimaging techniques is commonly dependent on statistical analyses of groups of subjects in order to identify sites of activation, particularly in studies of episodic memory. Exclusive reliance on group analysis may be to the detriment of understanding the true underlying cognitive nature of brain activations. In the present study, we found that the patterns of brain activity associated with episodic retrieval are very distinct for individual subjects from the patterns of brain activity at the group level. These differences go beyond the relatively small variations due to cyctoarchitectonic differences or spatial normalization. We quantify this individual variability by cross-correlating volumes of brain images. We demonstrate that individual patterns of brain activity are reliable over time despite their extensive variability. We suggest that varied but reliable individual patterns of significant brain activity may be indicative of different cognitive strategies used to produce a recognition response. We believe that individual analysis in conjunction with group analysis may be critical to fully understanding the relationship between retrieval processes and underlying brain regions.
Collapse
Affiliation(s)
- Michael B Miller
- Department of Psychology, University of California, Santa Barbara 93106, USA.
| | | | | | | | | | | | | | | |
Collapse
|