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Martin KC, Seydell-Greenwald A, Turkeltaub PE, Chambers CE, Giannetti M, Dromerick AW, Carpenter JL, Berl MM, Gaillard WD, Newport EL. One right can make a left: sentence processing in the right hemisphere after perinatal stroke. Cereb Cortex 2023; 33:11257-11268. [PMID: 37859521 PMCID: PMC10690853 DOI: 10.1093/cercor/bhad362] [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: 04/14/2023] [Revised: 09/08/2023] [Indexed: 10/21/2023] Open
Abstract
When brain regions that are critical for a cognitive function in adulthood are irreversibly damaged at birth, what patterns of plasticity support the successful development of that function in an alternative location? Here we investigate the consistency of language organization in the right hemisphere (RH) after a left hemisphere (LH) perinatal stroke. We analyzed fMRI data collected during an auditory sentence comprehension task on 14 people with large cortical LH perinatal arterial ischemic strokes (left hemisphere perinatal stroke (LHPS) participants) and 11 healthy sibling controls using a "top voxel" approach that allowed us to compare the same number of active voxels across each participant and in each hemisphere for controls. We found (1) LHPS participants consistently recruited the same RH areas that were a mirror-image of typical LH areas, and (2) the RH areas recruited in LHPS participants aligned better with the strongly activated LH areas of the typically developed brains of control participants (when flipped images were compared) than the weakly activated RH areas. Our findings suggest that the successful development of language processing in the RH after a LH perinatal stroke may in part depend on recruiting an arrangement of frontotemporal areas reflective of the typical dominant LH.
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Affiliation(s)
- Kelly C Martin
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Georgetown University, Washington, DC 20057, United States
| | - Anna Seydell-Greenwald
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Georgetown University, Washington, DC 20057, United States
- MedStar National Rehabilitation Hospital, Washington, DC 20010, United States
| | - Peter E Turkeltaub
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Georgetown University, Washington, DC 20057, United States
- MedStar National Rehabilitation Hospital, Washington, DC 20010, United States
| | - Catherine E Chambers
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Georgetown University, Washington, DC 20057, United States
- MedStar National Rehabilitation Hospital, Washington, DC 20010, United States
| | - Margot Giannetti
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Georgetown University, Washington, DC 20057, United States
- MedStar National Rehabilitation Hospital, Washington, DC 20010, United States
| | - Alexander W Dromerick
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Georgetown University, Washington, DC 20057, United States
- MedStar National Rehabilitation Hospital, Washington, DC 20010, United States
| | - Jessica L Carpenter
- Division of Pediatric Neurology, Departments of Pediatrics and Neurology, University of Maryland School of Medicine, Baltimore MD 21201, United States
| | - Madison M Berl
- Children’s National Hospital and Center for Neuroscience, Washington, DC 20010, United States
| | - William D Gaillard
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Georgetown University, Washington, DC 20057, United States
- Children’s National Hospital and Center for Neuroscience, Washington, DC 20010, United States
| | - Elissa L Newport
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Georgetown University, Washington, DC 20057, United States
- MedStar National Rehabilitation Hospital, Washington, DC 20010, United States
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Tuckute G, Paunov A, Kean H, Small H, Mineroff Z, Blank I, Fedorenko E. Frontal language areas do not emerge in the absence of temporal language areas: A case study of an individual born without a left temporal lobe. Neuropsychologia 2022; 169:108184. [DOI: 10.1016/j.neuropsychologia.2022.108184] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 12/07/2021] [Accepted: 02/15/2022] [Indexed: 10/19/2022]
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Sharma VV, Vannest J, Greiner HM, Fujiwara H, Tenney JR, Williamson BJ, Kadis DS. Beta synchrony for expressive language lateralizes to right hemisphere in development. Sci Rep 2021; 11:3949. [PMID: 33597643 PMCID: PMC7889886 DOI: 10.1038/s41598-021-83373-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 02/02/2021] [Indexed: 01/31/2023] Open
Abstract
A left perisylvian network is known to support language in healthy adults. Low-beta (13-23 Hz) event-related desynchrony (ERD) has been observed during verb generation, at approximately 700-1200 ms post-stimulus presentation in past studies; the signal is known to reflect increased neuronal firing and metabolic demand during language production. In contrast, concurrent beta event-related synchrony (ERS) is thought to reflect neuronal inhibition but has not been well studied in the context of language. Further, while low-beta ERD for expressive language has been found to gradually shift from bilateral in childhood to left hemispheric by early adulthood, developmental lateralization of ERS has not been established. We used magnetoencephalography to study low beta ERS lateralization in a group of children and adolescents (n = 78), aged 4 to less than 19 years, who performed covert verb generation. We found that the youngest children had bilateral ERD and ERS. By adolescence, low-beta ERD was predominantly left lateralized in perisylvian cortex (i.e., Broca's and Wernicke's regions), while beta ERS was predominantly right lateralized. Increasing lateralization was significantly correlated to age for both ERD (Spearman's r = 0.45, p < 0.01) and ERS (Spearman's r = - 0.44, p < 0.01). Interestingly, while ERD lateralized in a linear manner, ERS lateralization followed a nonlinear trajectory, suggesting distinct developmental trajectories. Implications to early-age neuroplasticity and neuronal inhibition are discussed.
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Affiliation(s)
- Vivek V Sharma
- Neurosciences and Mental Health, Hospital for Sick Children, 686 Bay Street, Toronto, ON, M5G 0A4, Canada
| | - Jennifer Vannest
- Communication Sciences & Disorders, University of Cincinnati, Cincinnati, OH, USA
- Division of Speech-Language Pathology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Hansel M Greiner
- Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Hisako Fujiwara
- Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Jeffrey R Tenney
- Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | | | - Darren S Kadis
- Neurosciences and Mental Health, Hospital for Sick Children, 686 Bay Street, Toronto, ON, M5G 0A4, Canada.
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
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Pant R, Kanjlia S, Bedny M. A sensitive period in the neural phenotype of language in blind individuals. Dev Cogn Neurosci 2020; 41:100744. [PMID: 31999565 PMCID: PMC6994632 DOI: 10.1016/j.dcn.2019.100744] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 11/15/2019] [Accepted: 11/29/2019] [Indexed: 01/18/2023] Open
Abstract
Congenital blindness modifies the neural basis of language: "visual" cortices respond to linguistic information, and fronto-temporal language networks are less left-lateralized. We tested the hypothesis that this plasticity follows a sensitive period by comparing the neural basis of sentence processing between adult-onset blind (AB, n = 16), congenitally blind (CB, n = 22) and blindfolded sighted adults (n = 18). In Experiment 1, participants made semantic judgments for spoken sentences and, in a control condition, solved math equations. In Experiment 2, participants answered "who did what to whom" yes/no questions for grammatically complex (with syntactic movement) and simpler sentences. In a control condition, participants performed a memory task with non-words. In both experiments, visual cortices of CB and AB but not sighted participants responded more to sentences than control conditions, but the effect was much larger in the CB group. Only the "visual" cortex of CB participants responded to grammatical complexity. Unlike the CB group, the AB group showed no reduction in left-lateralization of fronto-temporal language network, relative to the sighted. These results suggest that congenital blindness modifies the neural basis of language differently from adult-onset blindness, consistent with a developmental sensitive period hypothesis.
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Affiliation(s)
- Rashi Pant
- Department of Psychological and Brain Sciences, Johns Hopkins University, USA; Biological Psychology and Neuropsychology, University of Hamburg, Germany.
| | - Shipra Kanjlia
- Department of Psychological and Brain Sciences, Johns Hopkins University, USA
| | - Marina Bedny
- Department of Psychological and Brain Sciences, Johns Hopkins University, USA
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Functional lateralization of tool-sound and action-word processing in a bilingual brain. HEALTH PSYCHOLOGY REPORT 2020. [DOI: 10.5114/hpr.2020.92718] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Right Structural and Functional Reorganization in Four-Year-Old Children with Perinatal Arterial Ischemic Stroke Predict Language Production. eNeuro 2019; 6:ENEURO.0447-18.2019. [PMID: 31383726 PMCID: PMC6749144 DOI: 10.1523/eneuro.0447-18.2019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 04/24/2019] [Accepted: 06/03/2019] [Indexed: 11/21/2022] Open
Abstract
Brain imaging methods have contributed to shed light on the mechanisms of recovery after early brain insult. The assumption that the unaffected right hemisphere can take over language functions after left perinatal stroke is still under debate. Here, we report how patterns of brain structural and functional reorganization were associated with language outcomes in a group of four-year-old children with left perinatal arterial ischemic stroke (PAIS). Specifically, we gathered specific fine-grained developmental measures of receptive and productive aspects of language as well as standardized measures of cognitive development. We also collected structural neuroimaging data as well as functional activations during a passive listening story-telling fMRI task and a resting state session (rs-fMRI). Children with a left perinatal stroke showed larger lateralization indices of both structural and functional connectivity of the dorsal language pathway towards the right hemisphere that, in turn, were associated with better language outcomes. Importantly, the pattern of structural asymmetry was significantly more right-lateralized in children with a left perinatal brain insult than in a group of matched healthy controls. These results strongly suggest that early lesions of the left dorsal pathway and the associated perisylvian regions can induce the interhemispheric transfer of language functions to right homolog regions. This study provides combined evidence of structural and functional brain reorganization of language networks after early stroke with strong implications for neurobiological models of language development.
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Yi YG, Kim DY, Shim WH, Oh JY, Kim HS, Jung M. Perilesional and homotopic area activation during proverb comprehension after stroke. Brain Behav 2019; 9:e01202. [PMID: 30588768 PMCID: PMC6346665 DOI: 10.1002/brb3.1202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 10/22/2018] [Accepted: 11/30/2018] [Indexed: 12/19/2022] Open
Abstract
INTRODUCTION The mechanism of functional recovery in right hemisphere (RH) stroke patients when attempting to comprehend a proverb has not been identified. We previously reported that there is bilateral hemisphere involvement during proverb comprehension in the normal population. However, the underlying mechanisms of proverb comprehension following a right middle cerebral artery (MCA) infarction have not yet been fully elucidated. METHODS We here compared the brain regions activated by literal sentences and by opaque or transparent proverbs in right MCA infarction patients using functional magnetic resonance imaging (fMRI). Experimental stimuli included 18 opaque proverbs, 18 transparent proverbs, and 18 literal sentences that were presented pseudorandomly in 1 of 3 predesigned sequences. RESULTS Fifteen normal adults and 17 right MCA infarction patients participated in this study. The areas of the brain in the stroke patients involved in understanding a proverb compared with a literal sentence included the right middle frontal gyrus (MFG) and frontal pole, right anterior cingulate gyrus/paracingulate gyrus and left inferior frontal gyrus (IFG), middle temporal gyrus (MTG), precuneus, and supramarginal gyrus (SMG). When the proverbs were presented to these stroke patients in the comprehension tests, the left supramarginal, postcentral gyrus, and right paracingulate gyrus were activated for the opaque proverbs compared to the transparent proverbs. CONCLUSIONS These findings suggest that the functional recovery of language in stroke patients can be explained by perilesional activation, which is thought to arise from the regulation of the excitatory and inhibitory neurotransmitter system, and by homotopic area activation which has been characterized by decreased transcallosal inhibition and astrocyte involvement.
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Affiliation(s)
- You Gyoung Yi
- Department of Rehabilitation Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Dae Yul Kim
- Department of Rehabilitation Medicine, Asan Medical Center, Seoul, Korea
| | - Woo Hyun Shim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, Seoul, Korea
| | - Joo Young Oh
- Asan Institute for Life Science, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Ho Sung Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, Seoul, Korea
| | - Minji Jung
- Department of Rehabilitation Medicine, Asan Medical Center, Seoul, Korea
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Scheppele M, Evans JL, Brown TT. Patterns of structural lateralization in cortical language areas of older adolescents. Laterality 2018; 24:450-481. [DOI: 10.1080/1357650x.2018.1543312] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Meredith Scheppele
- Department of Communication Sciences and Disorders, University of Texas-Dallas, Richardson, TX, USA
| | - Julia L. Evans
- Department of Communication Sciences and Disorders, University of Texas-Dallas, Richardson, TX, USA
| | - Timothy T. Brown
- Department of Neurosciences and Center for Multimodal Imaging and Genetics, School of Medicine, University of California, San Diego, La Jolla, CA, USA
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Transcranial direct current stimulation (tDCS) facilitates verb learning by altering effective connectivity in the healthy brain. Neuroimage 2018; 181:550-559. [DOI: 10.1016/j.neuroimage.2018.07.040] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 07/15/2018] [Accepted: 07/16/2018] [Indexed: 12/23/2022] Open
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Rice GE, Caswell H, Moore P, Lambon Ralph MA, Hoffman P. Revealing the Dynamic Modulations That Underpin a Resilient Neural Network for Semantic Cognition: An fMRI Investigation in Patients With Anterior Temporal Lobe Resection. Cereb Cortex 2018; 28:3004-3016. [PMID: 29878076 PMCID: PMC6041810 DOI: 10.1093/cercor/bhy116] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Indexed: 11/13/2022] Open
Abstract
One critical feature of any well-engineered system is its resilience to perturbation and minor damage. The purpose of the current study was to investigate how resilience is achieved in higher cognitive systems, which we explored through the domain of semantic cognition. Convergent evidence implicates the bilateral anterior temporal lobes (ATLs) as a conceptual knowledge hub. While bilateral damage to this region produces profound semantic impairment, unilateral atrophy/resection or transient perturbation has a limited effect. Two neural mechanisms might underpin this resilience to unilateral ATL damage: 1) the undamaged ATL upregulates its activation in order to compensate; and/or 2) prefrontal regions involved in control of semantic retrieval upregulate to compensate for the impoverished semantic representations that follow from ATL damage. To test these possibilities, 34 postsurgical temporal lobe epilepsy patients and 20 age-matched controls were scanned whilst completing semantic tasks. Pictorial tasks, which produced bilateral frontal and temporal activation, showed few activation differences between patients and control participants. Written word tasks, however, produced a left-lateralized activation pattern and greater differences between the groups. Patients with right ATL resection increased activation in left inferior frontal gyrus (IFG). Patients with left ATL resection upregulated both the right ATL and right IFG. Consistent with recent computational models, these results indicate that 1) written word semantic processing in patients with ATL resection is supported by upregulation of semantic knowledge and control regions, principally in the undamaged hemisphere, and 2) pictorial semantic processing is less affected, presumably because it draws on a more bilateral network.
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Affiliation(s)
- Grace E Rice
- Neuroscience and Aphasia Research Unit (NARU), University of Manchester, Manchester, UK
| | - Helen Caswell
- Department of Clinical Neuropsychology, Salford Royal Hospital, Manchester, UK
| | - Perry Moore
- Department of Clinical Neuropsychology, The Walton Centre NHS Foundation Trust, Liverpool, UK
| | | | - Paul Hoffman
- Centre for Cognitive Ageing and Cognitive Epidemiology (CCACE), Department of Psychology, University of Edinburgh, Edinburgh, UK
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Lidzba K, de Haan B, Wilke M, Krägeloh-Mann I, Staudt M. Lesion characteristics driving right-hemispheric language reorganization in congenital left-hemispheric brain damage. BRAIN AND LANGUAGE 2017; 173:1-9. [PMID: 28549234 DOI: 10.1016/j.bandl.2017.04.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 04/19/2017] [Accepted: 04/28/2017] [Indexed: 06/07/2023]
Abstract
Pre- or perinatally acquired ("congenital") left-hemispheric brain lesions can be compensated for by reorganizing language into homotopic brain regions in the right hemisphere. Language comprehension may be hemispherically dissociated from language production. We investigated the lesion characteristics driving inter-hemispheric reorganization of language comprehension and language production in 19 patients (7-32years; eight females) with congenital left-hemispheric brain lesions (periventricular lesions [n=11] and middle cerebral artery infarctions [n=8]) by fMRI. 16/17 patients demonstrated reorganized language production, while 7/19 patients had reorganized language comprehension. Lesions to the insular cortex and the temporo-parietal junction (predominantly supramarginal gyrus) were significantly more common in patients in whom both, language production and comprehension were reorganized. These areas belong to the dorsal stream of the language network, participating in the auditory-motor integration of language. Our data suggest that the integrity of this stream might be crucial for a normal left-lateralized language development.
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Affiliation(s)
- Karen Lidzba
- University Children's Hospital, Department of Pediatric Neurology and Developmental Medicine, University of Tübingen, Hoppe-Seyler-Str. 1, 72076 Tübingen, Germany; Experimental Pediatric Neuroimaging Group, Department of Pediatric Neurology and Developmental Medicine & Department of Neuroradiology, University Hospital Tübingen, Hoppe-Seyler-Str. 1, 72076 Tübingen, Germany.
| | - Bianca de Haan
- Center of Neurology, Division of Neuropsychology, Hertie-Institute of Clinical Brain Research, University of Tübingen, Hoppe-Seyler-Str. 3, 72076 Tübingen, Germany
| | - Marko Wilke
- University Children's Hospital, Department of Pediatric Neurology and Developmental Medicine, University of Tübingen, Hoppe-Seyler-Str. 1, 72076 Tübingen, Germany; Experimental Pediatric Neuroimaging Group, Department of Pediatric Neurology and Developmental Medicine & Department of Neuroradiology, University Hospital Tübingen, Hoppe-Seyler-Str. 1, 72076 Tübingen, Germany
| | - Ingeborg Krägeloh-Mann
- University Children's Hospital, Department of Pediatric Neurology and Developmental Medicine, University of Tübingen, Hoppe-Seyler-Str. 1, 72076 Tübingen, Germany
| | - Martin Staudt
- University Children's Hospital, Department of Pediatric Neurology and Developmental Medicine, University of Tübingen, Hoppe-Seyler-Str. 1, 72076 Tübingen, Germany; Clinic for Neuropediatrics and Neurorehabilitation, Epilepsy Centre for Children and Adolescents, Schön Klinik Vogtareuth, Krankenhausstr. 20, 83569 Vogtareuth, Germany
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12
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Biduła SP, Przybylski Ł, Pawlak MA, Króliczak G. Unique Neural Characteristics of Atypical Lateralization of Language in Healthy Individuals. Front Neurosci 2017; 11:525. [PMID: 28983238 PMCID: PMC5613132 DOI: 10.3389/fnins.2017.00525] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 09/07/2017] [Indexed: 12/15/2022] Open
Abstract
Using functional magnetic resonance imaging (fMRI) in 63 healthy participants, including left-handed and ambidextrous individuals, we tested how atypical lateralization of language—i. e., bilateral or right hemispheric language representation—differs from the typical left-hemisphere dominance. Although regardless of their handedness, all 11 participants from the atypical group engaged classical language centers, i.e., Broca's and Wernicke's areas, the right-hemisphere components of the default mode network (DMN), including the angular gyrus and middle temporal gyrus, were also critically involved during the verbal fluency task. Importantly, activity in these regions could not be explained in terms of mirroring the typical language pattern because left-hemisphere dominant individuals did not exhibit similar significant signal modulations. Moreover, when spatial extent of language-related activity across whole brain was considered, the bilateral language organization entailed more diffuse functional processing. Finally, we detected significant differences between the typical and atypical group in the resting-state connectivity at the global and local level. These findings suggest that the atypical lateralization of language has unique features, and is not a simple mirror image of the typical left hemispheric language representation.
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Affiliation(s)
- Szymon P Biduła
- Action and Cognition Laboratory, Institute of Psychology, Adam Mickiewicz University in PoznańPoznan, Poland
| | - Łukasz Przybylski
- Action and Cognition Laboratory, Institute of Psychology, Adam Mickiewicz University in PoznańPoznan, Poland
| | - Mikołaj A Pawlak
- Department of Neurology and Cerebrovascular Disorders, Poznań University of Medical SciencesPoznan, Poland
| | - Gregory Króliczak
- Action and Cognition Laboratory, Institute of Psychology, Adam Mickiewicz University in PoznańPoznan, Poland
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Gingras B, Braun CMJ. Development of "material-specific" hemispheric specialization from beginning to end. Laterality 2017; 23:422-440. [PMID: 28876165 DOI: 10.1080/1357650x.2017.1373780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Disparity of verbal and performance intelligence (VIQ, PIQ) on the Wechsler scales of intelligence is a conceptually cluttered and empirically weak measure of hemispheric specialization (HS). However, in the context of life span research, it is the only measure that can be exploited meta-analytically with the lesion method from prenatal life to late senescence. We assembled 1917 cases with a unilateral cortical focal brain lesion occurring at all ages and a post-lesion VIQ and PIQ. Lesion locus, volume and side were documented for each case, as well as age at lesion onset, age at first symptoms and age at the IQ test, presence/absence of epilepsy, lesion aetiology, gender, date of publication or of transfer of medical file. With and without covariate adjustment, HS was significant across the life span though its pattern changed. HS increased linearly and highly significantly until late senescence. Only in early adulthood did VIQ appear to vacate the right temporal lobe and occupy the left and PIQ vacate the left parietal lobe and occupy the right until late senescence. Biomaturational factors are more important in the ontogeny of material-specific HS over the whole life span than previously established.
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Affiliation(s)
- Benjamin Gingras
- a Department of Psychology , Université du Québec à Montréal , Montreal , QC , Canada
| | - Claude M J Braun
- a Department of Psychology , Université du Québec à Montréal , Montreal , QC , Canada
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Connectome-scale assessment of structural and functional connectivity in mild traumatic brain injury at the acute stage. NEUROIMAGE-CLINICAL 2016; 12:100-115. [PMID: 27408795 PMCID: PMC4932612 DOI: 10.1016/j.nicl.2016.06.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 06/08/2016] [Accepted: 06/14/2016] [Indexed: 01/16/2023]
Abstract
Mild traumatic brain injury (mTBI) accounts for over one million emergency visits each year in the United States. The large-scale structural and functional network connectivity changes of mTBI are still unknown. This study was designed to determine the connectome-scale brain network connectivity changes in mTBI at both structural and functional levels. 40 mTBI patients at the acute stage and 50 healthy controls were recruited. A novel approach called Dense Individualized and Common Connectivity-based Cortical Landmarks (DICCCOLs) was applied for connectome-scale analysis of both diffusion tensor imaging and resting state functional MRI data. Among 358 networks identified on DICCCOL analysis, 41 networks were identified as structurally discrepant between patient and control groups. The involved major white matter tracts include the corpus callosum, and superior and inferior longitudinal fasciculi. Functional connectivity analysis identified 60 connectomic signatures that differentiate patients from controls with 93.75% sensitivity and 100% specificity. Analysis of functional domains showed decreased intra-network connectivity within the emotion network and among emotion-cognition interactions, and increased interactions among action-emotion and action-cognition as well as within perception networks. This work suggests that mTBI may result in changes of structural and functional connectivity on a connectome scale at the acute stage.
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Language function distribution in left-handers: A navigated transcranial magnetic stimulation study. Neuropsychologia 2016; 82:65-73. [PMID: 26792365 DOI: 10.1016/j.neuropsychologia.2016.01.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 12/17/2015] [Accepted: 01/10/2016] [Indexed: 11/21/2022]
Abstract
Recent studies suggest that in left-handers, the right hemisphere (RH) is more involved in language function when compared to right-handed subjects. Since data on lesion-based approaches is lacking, we aimed to investigate language distribution of left-handers by repetitive navigated transcranial magnetic stimulation (rTMS). Thus, rTMS was applied to the left hemisphere (LH) and RH in 15 healthy left-handers during an object-naming task, and resulting naming errors were categorized. Then, we calculated error rates (ERs=number of errors per number of stimulations) for both hemispheres separately and defined a laterality score as the quotient of the LH ER - RH ER through the LH ER + RH ER (abbreviated as (L-R)/(L+R)). In this context, (L-R)/(L+R)>0 indicates that the LH is dominant, whereas (L-R)/(L+R)<0 shows that the RH is dominant. No significant difference in ERs was found between hemispheres (all errors: mean LH 18.0±11.7%, mean RH 18.1±12.2%, p=0.94; all errors without hesitation: mean LH 12.4±9.8%, mean RH 12.9±10.0%, p=0.65; no responses: mean LH 9.3±9.2%, mean RH 11.5±10.3%, p=0.84). However, a significant difference between the results of (L-R)/(L+R) of left-handers and right-handers (source data of another study) for all errors (mean 0.01±0.14 vs. 0.19±0.20, p=0.0019) and all errors without hesitation (mean -0.02±0.20 vs. 0.19±0.28, p=0.0051) was revealed, whereas the comparison for no responses did not show a significant difference (mean: -0.004±0.27 vs. 0.09±0.44, p=0.64). Accordingly, left-handers present a comparatively equal language distribution across both hemispheres with language dominance being nearly equally distributed between hemispheres in contrast to right-handers.
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16
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Berberian AP, Hopker C, Mazzarotto I, Cunha J, Guarinello AC, Massi G, Crippa A. Aspects of Oral Language, Speech, and Written Language in Subjects with Temporal Lobe Epilepsy of Difficult Control. Int Arch Otorhinolaryngol 2015; 19:302-8. [PMID: 26491475 PMCID: PMC4593911 DOI: 10.1055/s-0035-1547524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 01/26/2015] [Indexed: 11/16/2022] Open
Abstract
Introduction About 50 million people have epilepsy and 30% of them have epilepsy that does not respond to properly conducted drug treatment. Objective Verify the incidence of language disorders in oral language, speech, and written language of subjects with difficult to control temporal lobe epilepsy (TLE) and compare the occurrence of these disorders in subjects before and after surgery. Methods Cross-sectional study with quantitative analysis, exploratory type. A questionnaire for data collection was administered covering the following aspects: oral language, speech complaints, and writing production and comprehension. Criteria for inclusion of subjects were a diagnosis of TLE refractory to drug treatment and at least 4 years of schooling. Results The sample of 63 patients with TLE was divided into two groups: presurgical (n = 31) and postsurgical (n = 32). In the postsurgical group, there was a higher frequency of left lobectomy (75%) than right (25%). Conclusion Statistical analysis was performed with the chi-square test (significance level of 0.05). Complaints related to speech-language attention were more predominant in postsurgical subjects. Analysis of oral language, speech, and written language in subjects with epilepsy who underwent temporal lobectomy or not showed findings consistent with symptoms related to transient aphasia, with the presence of paraphasias, as well as changes in speech prosody and melody. These symptoms appeared more associated with recurrence after having a temporal lobectomy.
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Affiliation(s)
- Ana Paula Berberian
- Masters and Doctorate Program in Communication Disorders, Universidade Tuiuti do Paraná, Curitiba, Paraná, Brazil
| | - Christiane Hopker
- Masters and Doctorate Program in Communication Disorders, Universidade Tuiuti do Paraná, Curitiba, Paraná, Brazil
| | - Ingrid Mazzarotto
- Masters and Doctorate Program in Communication Disorders, Universidade Tuiuti do Paraná, Curitiba, Paraná, Brazil
| | - Jenane Cunha
- Masters and Doctorate Program in Communication Disorders, Universidade Tuiuti do Paraná, Curitiba, Paraná, Brazil
| | - Ana Cristina Guarinello
- Masters and Doctorate Program in Communication Disorders, Universidade Tuiuti do Paraná, Curitiba, Paraná, Brazil
| | - Giselle Massi
- Masters and Doctorate Program in Communication Disorders, Universidade Tuiuti do Paraná, Curitiba, Paraná, Brazil
| | - Ana Crippa
- Department of Neurophysiology, Universidade Federal do Paraná, Curitiba, Brazil
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Berg AT. Paediatric epilepsy surgery: making the best of a tough situation. ACTA ACUST UNITED AC 2014; 138:4-5. [PMID: 25392200 DOI: 10.1093/brain/awu320] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Anne T Berg
- Lurie Children's Hospital and Northwestern Feinberg School of Medicine, Chicago, USA
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18
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Abstract
The brain is highly plastic after stroke or epilepsy; however, there is a paucity of brain plasticity investigation after traumatic brain injury (TBI). This mini review summarizes the most recent evidence of brain plasticity in human TBI patients from the perspective of advanced magnetic resonance imaging. Similar to other forms of acquired brain injury, TBI patients also demonstrated both structural reorganization as well as functional compensation by the recruitment of other brain regions. However, the large scale brain network alterations after TBI are still unknown, and the field is still short of proper means on how to guide the choice of TBI rehabilitation or treatment plan to promote brain plasticity. The authors also point out the new direction of brain plasticity investigation.
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Affiliation(s)
- Zhifeng Kou
- Department of Biomedical Engineering, Wayne State University, Detroit, MI, USA ; Department of Radiology, Wayne State University, Detroit, MI, USA
| | - Armin Iraji
- Department of Biomedical Engineering, Wayne State University, Detroit, MI, USA
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19
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Oh A, Duerden EG, Pang EW. The role of the insula in speech and language processing. BRAIN AND LANGUAGE 2014; 135:96-103. [PMID: 25016092 PMCID: PMC4885738 DOI: 10.1016/j.bandl.2014.06.003] [Citation(s) in RCA: 130] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 01/24/2014] [Accepted: 06/15/2014] [Indexed: 05/13/2023]
Abstract
Lesion and neuroimaging studies indicate that the insula mediates motor aspects of speech production, specifically, articulatory control. Although it has direct connections to Broca's area, the canonical speech production region, the insula is also broadly connected with other speech and language centres, and may play a role in coordinating higher-order cognitive aspects of speech and language production. The extent of the insula's involvement in speech and language processing was assessed using the Activation Likelihood Estimation (ALE) method. Meta-analyses of 42 fMRI studies with healthy adults were performed, comparing insula activation during performance of language (expressive and receptive) and speech (production and perception) tasks. Both tasks activated bilateral anterior insulae. However, speech perception tasks preferentially activated the left dorsal mid-insula, whereas expressive language tasks activated left ventral mid-insula. Results suggest distinct regions of the mid-insula play different roles in speech and language processing.
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Affiliation(s)
- Anna Oh
- Neurosciences and Mental Health, SickKids Research Institute, Toronto, Canada
| | - Emma G Duerden
- Neurosciences and Mental Health, SickKids Research Institute, Toronto, Canada; Diagnostic Imaging, Hospital for Sick Children, Toronto, Canada; Department of Paediatrics, University of Toronto, Toronto, Canada
| | - Elizabeth W Pang
- Neurosciences and Mental Health, SickKids Research Institute, Toronto, Canada; Neurology, Hospital for Sick Children, Toronto, Canada; Department of Paediatrics, University of Toronto, Toronto, Canada.
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20
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Vlachos F, Andreou E, Delliou A. Brain hemisphericity and developmental dyslexia. RESEARCH IN DEVELOPMENTAL DISABILITIES 2013; 34:1536-1540. [PMID: 23475004 DOI: 10.1016/j.ridd.2013.01.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 01/29/2013] [Accepted: 01/29/2013] [Indexed: 06/01/2023]
Abstract
The present study examined the link between brain hemisphericity and dyslexia in secondary school students, using the Preference Test (PT), a widely used self-report index of preferred hemisphere thinking styles. The hypothesis was that differences would be revealed between the dyslexic group and their peers in hemispheric preference. A total of 45 secondary school students who were diagnosed with dyslexia and attended regular public schools formed the learning disabled group. A comparison group was formed of pupils who attended the same classes (N=90), and these were matched for age and sex with dyslexics (1 dyslexic: 2 control). The results revealed that significantly more dyslexic pupils displayed a preference for a right hemisphere thinking style compared to their peers who adopted a left hemisphere thinking style. This finding is in line with the suggestion of the greater right hemisphere involvement in the expression of developmental dyslexia.
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Affiliation(s)
- Filippos Vlachos
- University of Thessaly, Department of Special Education, Argonafton & Filellinon, 38221 Volos, Greece.
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