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Aron O, Mezjan I, Krieg J, Ferrand M, Colnat-Coulbois S, Maillard L. Mapping the basal temporal language network: a SEEG functional connectivity study. BRAIN AND LANGUAGE 2024; 258:105486. [PMID: 39388909 DOI: 10.1016/j.bandl.2024.105486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 09/04/2024] [Accepted: 10/04/2024] [Indexed: 10/12/2024]
Abstract
The Basal Temporal Language Area (BTLA) is recognized in epilepsy surgery setting when cortical electrical stimulation (CES) of the ventral temporal cortex (VTC) trigger anomia or paraphasia during naming tasks. Despite acknowledging a ventral language stream, current cognitive language models fail to properly integrate this entity. In this SEEG study we used cortico-cortical evoked potentials in nine epileptic patients to assess and compare the effective connectivity of 73 sites in the left VTC of which 26 were deemed eloquent for naming after CES (BTLA). Eloquent sites connectivity supports the existence of a basal temporal language network (BTLN) structured around posterior projectors while the fusiform gyrus behaved as an integrator. BTLN was strongly connected to the amygdala and hippocampus unlike the non-eloquent sites, except for the anterior fusiform gyrus (FG). These observations support the FG as a multimodal functional hub and add to our understanding of ventral temporal language processing.
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Affiliation(s)
- Olivier Aron
- Lorraine University, CHRU Nancy, Neurology Department, Nancy, France; Lorraine University, CNRS, IMoPA, F-54000, Nancy, France.
| | - Insafe Mezjan
- Lorraine University, CHRU Nancy, Neurosurgery Department, Nancy, France; Lorraine University, CNRS, IMoPA, F-54000, Nancy, France
| | - Julien Krieg
- Lorraine University, CHRU Nancy, Neurology Department, Nancy, France
| | - Mickael Ferrand
- Lorraine University, CHRU Nancy, Neurology Department, Nancy, France
| | - Sophie Colnat-Coulbois
- Lorraine University, CHRU Nancy, Neurosurgery Department, Nancy, France; Lorraine University, CNRS, IMoPA, F-54000, Nancy, France
| | - Louis Maillard
- Lorraine University, CHRU Nancy, Neurology Department, Nancy, France; Lorraine University, CNRS, IMoPA, F-54000, Nancy, France
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Provlotskaya I, Minnigulova A, Zyryanov A, Takmakov M, Gordeyeva E, Stupina E, Gunenko G, Kalinovskiy A, Antonova N, Surova A, Gronskaya N, Zuev A, Pedyash N, Dimertsev A, Medyanik I, Yashin K, Ostapyuk M, Dragoy O. How well can simple clinical features predict long-term language recovery after left-hemisphere glioma surgery? J Neurooncol 2024:10.1007/s11060-024-04836-7. [PMID: 39369365 DOI: 10.1007/s11060-024-04836-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Accepted: 09/19/2024] [Indexed: 10/07/2024]
Abstract
PURPOSE Long-term language recovery after left-hemisphere glioma surgery varies substantially across patients. We investigated how well it can be predicted using clinical variables such as the postoperative decline in language processing, tumor grade, resection volume and location, extent of resection, and intraoperative language mapping. Beyond predicting the overall recovery, we examined which domains of language processing are most prone to persistent deficits. METHODS Fifty-nine patients with left-hemisphere gliomas completed the Russian Aphasia Test (RAT) before surgery, immediately after surgery, and at follow-up three to seventeen months after surgery. We modeled their average language score (Generalized Aphasia Quotient, GAQ) at follow-up using a cross-validated multiple linear regression and calculated the number of patients showing persistent deficits in each subtest of the RAT. RESULTS The difference between GAQ scores at follow-up and before surgery was not significant at the group level but varied substantially across patients (mean -1.3%, range -34.2 - 9.2%). Our best-performing model predicted the follow-up GAQ scores with the mean absolute error of 3.5% (cross-validated R2 = 0.15). A greater decline in language processing immediately after surgery predicted worse recovery, whereas intraoperative language mapping predicted better recovery. Deficits in sentence repetition, verb production, verb and sentence comprehension, and object naming most often persisted at follow-up. CONCLUSION The postoperative decline in language processing and intraoperative language mapping explain a substantial amount of variability in long-term language recovery. Verbal working memory and lexical retrieval, particularly that of verbs, are most prone to persistent deficits.
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Affiliation(s)
- Irina Provlotskaya
- Center for Language and Brain, HSE University, 3 Krivokolenny Pereulok, 101000, Moscow, Russia.
| | - Alina Minnigulova
- Center for Language and Brain, HSE University, 3 Krivokolenny Pereulok, 101000, Moscow, Russia
| | - Andrey Zyryanov
- Center for Language and Brain, HSE University, 3 Krivokolenny Pereulok, 101000, Moscow, Russia
| | - Mikhail Takmakov
- Center for Language and Brain, HSE University, 3 Krivokolenny Pereulok, 101000, Moscow, Russia
| | - Elizaveta Gordeyeva
- Department of Neurology, National Medical and Surgical Center Named After N.I. Pirogov, 70 Nizhnyaya Pervomayskaya Ulitsa, Moscow, 105203, Russia
| | - Ekaterina Stupina
- Center for Language and Brain, HSE University, 3 Krivokolenny Pereulok, 101000, Moscow, Russia
| | - Galina Gunenko
- Department of Neurooncology, Federal Center of Neurosurgery Novosibirsk, 132/1 Nemirovicha-Danchenko Ulitsa, Novosibirsk, 630048, Russia
| | - Anton Kalinovskiy
- Department of Neurooncology, Federal Center of Neurosurgery Novosibirsk, 132/1 Nemirovicha-Danchenko Ulitsa, Novosibirsk, 630048, Russia
| | - Natalia Antonova
- Center for Language and Brain, HSE University, 25/12 Bolshaya Pecherskaya Ulitsa, Nizhny Novgorod, 603155, Russia
| | - Anastasia Surova
- Center for Language and Brain, HSE University, 25/12 Bolshaya Pecherskaya Ulitsa, Nizhny Novgorod, 603155, Russia
| | - Natalia Gronskaya
- Center for Language and Brain, HSE University, 25/12 Bolshaya Pecherskaya Ulitsa, Nizhny Novgorod, 603155, Russia
| | - Andrey Zuev
- Department of Neurosurgery, National Medical and Surgical Center Named After N.I. Pirogov, 70 Nizhnyaya Pervomayskaya Ulitsa, Moscow, 105203, Russia
| | - Nikita Pedyash
- Department of Neurosurgery, National Medical and Surgical Center Named After N.I. Pirogov, 70 Nizhnyaya Pervomayskaya Ulitsa, Moscow, 105203, Russia
| | - Alexey Dimertsev
- Department of Neurosurgery, National Medical and Surgical Center Named After N.I. Pirogov, 70 Nizhnyaya Pervomayskaya Ulitsa, Moscow, 105203, Russia
| | - Igor Medyanik
- Department of Neurosurgery, Privolzhsky Research Medical University, 10/1 Minin and Pozharsky Square, Nizhny Novgorod, 6030057, Russia
| | - Konstantin Yashin
- Department of Neurosurgery, Privolzhsky Research Medical University, 10/1 Minin and Pozharsky Square, Nizhny Novgorod, 6030057, Russia
| | - Michail Ostapyuk
- Department of Neurosurgery, Privolzhsky Research Medical University, 10/1 Minin and Pozharsky Square, Nizhny Novgorod, 6030057, Russia
| | - Olga Dragoy
- Center for Language and Brain, HSE University, 3 Krivokolenny Pereulok, 101000, Moscow, Russia
- Institute of Linguistics, Russian Academy of Sciences, Moscow, Russia
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Xu J, Chen W, Niu G, Meng Y, Qiu K, Li T, Wang L, Zhang L, Lv Y, Ding Z. Evaluating post-thrombectomy effective connectivity changes in anterior circulation stroke. Ann Clin Transl Neurol 2024. [PMID: 39367625 DOI: 10.1002/acn3.52221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Revised: 08/29/2024] [Accepted: 09/15/2024] [Indexed: 10/06/2024] Open
Abstract
OBJECTIVE Granger causal analysis (GCA) and amplitude of low-frequency fluctuation (ALFF) are commonly used to evaluate functional alterations in brain disorders. By combining the GCA and ALFF, this study aimed to investigate the effective connectivity (EC) changes in patients with acute ischemic stroke (AIS) and anterior circulation occlusion after mechanical thrombectomy (MT). METHODS Resting-state functional magnetic resonance imaging (rs-fMRI) data were collected from 43 AIS patients with anterior circulation occlusion within 1 week post-MT and 37 healthy controls. ALFF and GCA were calculated for each participant. Patients were further divided into groups based on prognosis and perfusion levels. The differences in ALFF and EC were compared between AIS patients and healthy controls and between subgroups of patients. Pearson correlations between EC, ALFF values, and clinical characteristics of patients were calculated. RESULTS Compared to healthy controls, post-MT, AIS patients exhibited significant ALFF increases in the left precuneus and decreases in the left fusiform gyrus and right caudate. Increased EC from the contralesional lingual gyrus, contralesional putamen, ipsilesional thalamus, and contralesional thalamus to the contralesional caudate was obsrved, while decrease in EC were found for contralesional caudate to the ipsilesional thalamus and medial superior frontal gyrus. EC differences were particularly notable between perfusion groups, with significantly lower EC in the poorly perfused group. EC values were also positively correlated with National Institutes of Health Stroke Scale (NIHSS) scores pre-MT. INTERPRETATION In AIS patients, the caudate nucleus was central to the observed EC changes post-MT, characterized by decreased outputs and increased inputs. These changes indicate functional remodeling within the cortico-basal ganglia-thalamic-cortical pathway.
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Affiliation(s)
- Jiaona Xu
- Department of Rehabilitation, Affiliated Hangzhou First People's Hospital, Westlake University School of Medicine, Hangzhou, China
| | - Weiwei Chen
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China
| | - Guozhong Niu
- Department of Neurology, Affiliated Hangzhou First People's Hospital, Westlake University School of Medicine, Hangzhou, China
| | - Yuting Meng
- Department of General Practice, Affiliated Hangzhou First People's Hospital, Westlake University School of Medicine, Hangzhou, China
| | - Kefan Qiu
- The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Tongyue Li
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China
| | - Luoyu Wang
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China
| | - Liqing Zhang
- Department of Radiology, Affiliated Hangzhou First People's Hospital, Westlake University School of Medicine, Hangzhou, China
| | - Yating Lv
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China
| | - Zhongxiang Ding
- Department of Radiology, Affiliated Hangzhou First People's Hospital, Westlake University School of Medicine, Hangzhou, China
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Woolnough O, Tandon N. Dissociation of reading and naming in ventral occipitotemporal cortex. Brain 2024; 147:2522-2529. [PMID: 38289871 PMCID: PMC11224612 DOI: 10.1093/brain/awae027] [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: 06/07/2023] [Revised: 12/22/2023] [Accepted: 01/14/2024] [Indexed: 02/01/2024] Open
Abstract
Lesions in the language-dominant ventral occipitotemporal cortex (vOTC) can result in selective impairment of either reading or naming, resulting in alexia or anomia. Yet, functional imaging studies that show differential activation for naming and reading do not reveal activity exclusively tuned to one of these inputs. To resolve this dissonance in the functional architecture of the vOTC, we used focused stimulation to the vOTC in 49 adult patients during reading and naming, and generated a population-level, probabilistic map to evaluate if reading and naming are clearly dissociable within individuals. Language mapping (50 Hz, 2829 stimulations) was performed during passage reading (216 positive sites) and visual naming (304 positive sites). Within the vOTC, we isolated sites that selectively disrupted reading (24 sites in 11 patients) or naming (27 sites in 12 patients), and those that disrupted both processes (75 sites in 21 patients). The anteromedial vOTC had a higher probability of producing naming disruption, while posterolateral regions resulted in greater reading-specific disruption. Between them lay a multi-modal region where stimulation disrupted both reading and naming. This work provides a comprehensive view of vOTC organization-the existence of a heteromodal cortex critical to both reading and naming, along with a causally dissociable unimodal naming cortex, and a reading-specific visual word form area in the vOTC. Their distinct roles as associative regions may thus relate to their connectivity within the broader language network that is disrupted by stimulation, more than to highly selective tuning properties. Our work also implies that pre-surgical mapping of both reading and naming is essential for patients requiring vOTC resections, as these functions are not co-localized, and such mapping may prevent the occurrence of unexpected deficits.
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Affiliation(s)
- Oscar Woolnough
- Vivian L. Smith Department of Neurosurgery, McGovern Medical School at UT Health Houston, Houston, TX 77030, USA
- Texas Institute for Restorative Neurotechnologies, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Nitin Tandon
- Vivian L. Smith Department of Neurosurgery, McGovern Medical School at UT Health Houston, Houston, TX 77030, USA
- Texas Institute for Restorative Neurotechnologies, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
- Memorial Hermann Hospital, Texas Medical Center, Houston, TX 77030, USA
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Sahu A, Rajeshree S, Kalika M, Ravat S, Shah U. Naming assessment in bilinguals for epilepsy surgery-adaptation and standardization of Boston Naming Test in India. APPLIED NEUROPSYCHOLOGY. ADULT 2024:1-8. [PMID: 38648395 DOI: 10.1080/23279095.2024.2343009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
PURPOSE Naming difficulty is associated with temporal lobe epilepsy and a decline in naming ability is reported following dominant temporal lobe resections. The Boston Naming Test (BNT) is the most frequently used test for assessing naming ability. Evaluating naming ability in bilingual/multilingual populations is a challenge when participants are restricted to responding in one language. The study aimed to adapt and standardize the BNT as a valid clinical tool for evaluating bilingual/multilingual people undergoing epilepsy surgery in urban India. RESULTS Culture-appropriate adaptations were done, and participants were allowed to respond in any language. Data from 197 participants showed a strong education effect. The adaptation showed strong internal consistency, reliability, construct validity, and high sensitivity to left temporal lobe epilepsy performance. CONCLUSIONS The adapted version that allowed for flexible use of more than one language is a useful clinical tool for evaluating bilingual people undergoing epilepsy surgery.
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Affiliation(s)
- Aparna Sahu
- Department of Neurology, Seth G.S. Medical College & K.E.M. Hospital, Mumbai, India
| | - Shivani Rajeshree
- Department of Neurology, Seth G.S. Medical College & K.E.M. Hospital, Mumbai, India
| | - Mayuri Kalika
- Department of Neurology, Seth G.S. Medical College & K.E.M. Hospital, Mumbai, India
| | - Sangeeta Ravat
- Department of Neurology, Seth G.S. Medical College & K.E.M. Hospital, Mumbai, India
| | - Urvashi Shah
- Department of Neurology, Seth G.S. Medical College & K.E.M. Hospital, Mumbai, India
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Morkovina O, Manukyan P, Sharapkova A. Picture naming test through the prism of cognitive neuroscience and linguistics: adapting the test for cerebellar tumor survivors-or pouring new wine in old sacks? Front Psychol 2024; 15:1332391. [PMID: 38566942 PMCID: PMC10985186 DOI: 10.3389/fpsyg.2024.1332391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 02/20/2024] [Indexed: 04/04/2024] Open
Abstract
A picture naming test (PNT) has long been regarded as an integral part of neuropsychological assessment. In current research and clinical practice, it serves a variety of purposes. PNTs are used to assess the severity of speech impairment in aphasia, monitor possible cognitive decline in aging patients with or without age-related neurodegenerative disorders, track language development in children and map eloquent brain areas to be spared during surgery. In research settings, picture naming tests provide an insight into the process of lexical retrieval in monolingual and bilingual speakers. However, while numerous advances have occurred in linguistics and neuroscience since the classic, most widespread PNTs were developed, few of them have found their way into test design. Consequently, despite the popularity of PNTs in clinical and research practice, their relevance and objectivity remain questionable. The present study provides an overview of literature where relevant criticisms and concerns have been expressed over the recent decades. It aims to determine whether there is a significant gap between conventional test design and the current understanding of the mechanisms underlying lexical retrieval by focusing on the parameters that have been experimentally proven to influence picture naming. We discuss here the implications of these findings for improving and facilitating test design within the picture naming paradigm. Subsequently, we highlight the importance of designing specialized tests with a particular target group in mind, so that test variables could be selected for cerebellar tumor survivors.
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Affiliation(s)
- Olga Morkovina
- Laboratory of Diagnostics and Advancing Cognitive Functions, Research Institute for Brain Development and Peak Performance, RUDN University, Moscow, Russia
- Department of English, Faculty of Computational Mathematics and Cybernetics, Lomonosov Moscow State University, Moscow, Russia
| | - Piruza Manukyan
- Laboratory of Diagnostics and Advancing Cognitive Functions, Research Institute for Brain Development and Peak Performance, RUDN University, Moscow, Russia
| | - Anastasia Sharapkova
- Laboratory of Diagnostics and Advancing Cognitive Functions, Research Institute for Brain Development and Peak Performance, RUDN University, Moscow, Russia
- Department of English Linguistics, Faculty of Philology, Lomonosov Moscow State University, Moscow, Russia
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Volfart A, Rossion B, Brissart H, Busigny T, Colnat-Coulbois S, Maillard L, Jonas J. Stability of face recognition abilities after left or right anterior temporal lobectomy. J Neuropsychol 2024; 18 Suppl 1:115-133. [PMID: 37391874 DOI: 10.1111/jnp.12337] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 05/08/2023] [Accepted: 06/20/2023] [Indexed: 07/02/2023]
Abstract
Patients with anterior temporal lobe (ATL) resection due to mesial temporal lobe epilepsy (MTLE) have difficulties at identifying familiar faces and explicitly remembering newly learned faces but their ability to individuate unfamiliar faces remains largely unknown. Moreover, the extent to which their difficulties with familiar face identity recognition and learning is truly due to the ATL resection remains unknown. Here, we report a study of 24 MTLE patients and matched healthy controls tested with an extensive set of seven face and visual object recognition tasks (including three tasks evaluating unfamiliar face individuation) before and about 6 months after unilateral (nine left, 15 right) ATL resection. We found that ATL resection has little or no effect on the patients' preserved pre-surgical ability to perform unfamiliar face individuation, both at the group and individual levels. More surprisingly, ATL resection also has little effect on the patients' performance at recognizing and naming famous faces as well as at learning new faces. A substantial proportion of right MTLE patients (33%) even improved their response times on several tasks, which may indicate a functional release of visuo-spatial processing after resection in the right ATL. Altogether this study shows that face recognition abilities are mainly unaffected by ATL resection in MTLE, either because the critical regions for face recognition are spared or because performance at some tasks is already lower than normal preoperatively. Overall, these findings urge caution when interpreting the causal effect of brain lesions on face recognition ability in patients with ATL resection due to MTLE. They also illustrate the complexity of predicting cognitive outcomes after epilepsy surgery because of the influence of many different intertwined factors.
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Affiliation(s)
- Angélique Volfart
- CNRS, CRAN UMR 7039, Université de Lorraine, Nancy, France
- Institute of Research in Psychological Science, Université Catholique de Louvain, Louvain-La-Neuve, Belgium
- School of Psychology and Counselling, Faculty of Health, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Bruno Rossion
- CNRS, CRAN UMR 7039, Université de Lorraine, Nancy, France
- Institute of Research in Psychological Science, Université Catholique de Louvain, Louvain-La-Neuve, Belgium
- CHRU-Nancy, Service de Neurologie, Université de Lorraine, Nancy, France
| | - Hélène Brissart
- CNRS, CRAN UMR 7039, Université de Lorraine, Nancy, France
- CHRU-Nancy, Service de Neurologie, Université de Lorraine, Nancy, France
| | - Thomas Busigny
- CNRS, CRAN UMR 7039, Université de Lorraine, Nancy, France
| | - Sophie Colnat-Coulbois
- CNRS, CRAN UMR 7039, Université de Lorraine, Nancy, France
- CHRU-Nancy, Service de Neurochirurgie, Université de Lorraine, Nancy, France
| | - Louis Maillard
- CNRS, CRAN UMR 7039, Université de Lorraine, Nancy, France
- CHRU-Nancy, Service de Neurologie, Université de Lorraine, Nancy, France
| | - Jacques Jonas
- CNRS, CRAN UMR 7039, Université de Lorraine, Nancy, France
- CHRU-Nancy, Service de Neurologie, Université de Lorraine, Nancy, France
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Bonilha L, Rorden C, Roth R, Sen S, George MS, Fridriksson J. Improved naming in patients with Broca's aphasia with tDCS. J Neurol Neurosurg Psychiatry 2024; 95:273-276. [PMID: 38071545 DOI: 10.1136/jnnp-2023-331541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 08/23/2023] [Indexed: 12/22/2023]
Abstract
BACKGROUND Language impairment (aphasia) is a common neurological deficit after strokes. For individuals with chronic aphasia (beyond 6 months after the stroke), language improvements with speech therapy (ST) are often limited. Transcranial direct current stimulation (tDCS) is a promising approach to complement language recovery but interindividual variability in treatment response is common after tDCS, suggesting a possible relationship between tDCS and type of linguistic impairment (aphasia type). METHODS This current study is a subgroup analysis of a randomised controlled phase II futility design clinical trial on tDCS in chronic post-stroke aphasia. All participants received ST coupled with tDCS (n=31) vs sham tDCS (n=39). Confrontation naming was tested at baseline, and 1, 4, and 24 weeks post-treatment. RESULTS Broca's aphasia was associated with maximal adjunctive benefit of tDCS, with an average improvement of 10 additional named items with tDCS+ST compared with ST alone at 4 weeks post-treatment. In comparison, tDCS was not associated with significant benefits for other aphasia types F(1)=4.23, p=0.04. Among participants with Broca's aphasia, preservation of the perilesional posterior inferior temporal cortex was associated with higher treatment benefit (R=0.35, p=0.03). CONCLUSIONS These results indicate that adjuvant tDCS can enhance ST to treat naming in Broca's aphasia, and this may guide intervention approaches in future studies.
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Affiliation(s)
- Leonardo Bonilha
- Neurology, University of South Carolina School of Medicine, Columbia, South Carolina, USA
| | - Chris Rorden
- Psychology, University of South Carolina, Columbia, South Carolina, USA
| | - Rebecca Roth
- Neurology, Emory University, Atlanta, Georgia, USA
| | - Souvik Sen
- Neurology, University of South Carolina School of Medicine, Columbia, South Carolina, USA
| | - Mark S George
- Psychiatry, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Julius Fridriksson
- Communication Sciences and Disorders, University of South Carolina, Columbia, South Carolina, USA
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Murphy E, Forseth KJ, Donos C, Snyder KM, Rollo PS, Tandon N. The spatiotemporal dynamics of semantic integration in the human brain. Nat Commun 2023; 14:6336. [PMID: 37875526 PMCID: PMC10598228 DOI: 10.1038/s41467-023-42087-8] [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: 09/12/2022] [Accepted: 09/28/2023] [Indexed: 10/26/2023] Open
Abstract
Language depends critically on the integration of lexical information across multiple words to derive semantic concepts. Limitations of spatiotemporal resolution have previously rendered it difficult to isolate processes involved in semantic integration. We utilized intracranial recordings in epilepsy patients (n = 58) who read written word definitions. Descriptions were either referential or non-referential to a common object. Semantically referential sentences enabled high frequency broadband gamma activation (70-150 Hz) of the inferior frontal sulcus (IFS), medial parietal cortex, orbitofrontal cortex (OFC) and medial temporal lobe in the left, language-dominant hemisphere. IFS, OFC and posterior middle temporal gyrus activity was modulated by the semantic coherence of non-referential sentences, exposing semantic effects that were independent of task-based referential status. Components of this network, alongside posterior superior temporal sulcus, were engaged for referential sentences that did not clearly reduce the lexical search space by the final word. These results indicate the existence of complementary cortical mosaics for semantic integration in posterior temporal and inferior frontal cortex.
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Affiliation(s)
- Elliot Murphy
- Vivian L. Smith Department of Neurosurgery, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA.
- Texas Institute for Restorative Neurotechnologies, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA.
| | - Kiefer J Forseth
- Vivian L. Smith Department of Neurosurgery, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Texas Institute for Restorative Neurotechnologies, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Cristian Donos
- Faculty of Physics, University of Bucharest, Măgurele, 077125, Bucharest, Romania
| | - Kathryn M Snyder
- Vivian L. Smith Department of Neurosurgery, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Texas Institute for Restorative Neurotechnologies, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Patrick S Rollo
- Vivian L. Smith Department of Neurosurgery, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Texas Institute for Restorative Neurotechnologies, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Nitin Tandon
- Vivian L. Smith Department of Neurosurgery, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA.
- Texas Institute for Restorative Neurotechnologies, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA.
- Memorial Hermann Hospital, Texas Medical Center, Houston, TX, 77030, USA.
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Mhanna A, Bruss J, Sullivan AW, Howard MA, Tranel D, Boes AD. Anterolateral temporal lobe localization of dysnomia after temporal lobe epilepsy surgery. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.09.18.23295718. [PMID: 37790577 PMCID: PMC10543244 DOI: 10.1101/2023.09.18.23295718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Objectives To evaluate what factors influence naming ability after temporal lobectomy in patients with drug-resistant epilepsy. Methods 85 participants with drug-resistant epilepsy who underwent temporal lobe (TL) resective surgery were retrospectively identified (49 left TL and 36 right TL). Naming ability was assessed before and >3 months post-surgery using the Boston Naming Test (BNT).Multivariate lesion-symptom mapping was performed to evaluate whether lesion location related to naming deficits. Multiple regression analyses were conducted to examine if other patient characteristics were significantly associated with pre-to post-surgery changes in naming ability. Results Lesion laterality and location were important predictors of post-surgical naming performance. Naming performance significantly improved after right temporal lobectomy ( p = 0.015) while a decrement in performance was observed following left temporal lobectomy ( p = 0.002). Lesion-symptom mapping showed the decline in naming performance was associated with surgical resection of the anterior left middle temporal gyrus (Brodmann area 21, r =0.41, p = <.001). For left hemisphere surgery, later onset of epilepsy was associated with a greater reduction in post-surgical naming performance ( p = 0.01). Significance There is a wide range of variability in outcomes for naming ability after temporal lobectomy, from significant improvements to decrements observed. If future studies support the association of left anterior middle temporal gyrus resection and impaired naming this may help in surgical planning and discussions of prognosis.
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Stockbridge MD, Faria AV, Fridriksson J, Rorden C, Bonilha L, Hillis AE. Subacute aphasia recovery is associated with resting-state connectivity within and beyond the language network. Ann Clin Transl Neurol 2023; 10:1525-1532. [PMID: 37403712 PMCID: PMC10502663 DOI: 10.1002/acn3.51842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 06/23/2023] [Indexed: 07/06/2023] Open
Abstract
OBJECTIVE To examine changes to connectivity after aphasia treatment in the first 3 months after stroke. METHODS Twenty people experiencing aphasia within the first 3 months of stroke completed MRI before and immediately following 15 hours of language treatment. They were classified based on their response to treatment on a naming test of nouns as either high responders (10% improvement or more), or low responders (<10% improvement). Groups were similar in age, gender distribution, education, days since stroke, stroke volume, and baseline severity. Resting-state functional connectivity analysis was limited to the connectivity of the left fusiform gyrus with the bilateral inferior frontal gyrus, supramarginal gyrus, angular gyrus, and superior, middle, and inferior temporal gyrus, based on previous studies showing the importance of left fusiform gyrus in naming performance. RESULTS Baseline ipsilateral connectivity between the left fusiform gyrus and the language network was similar between high and low responders to therapy when controlling for stroke volume. Following therapy, change in connectivity was significantly greater among high responders between the left fusiform gyrus and the ipsilateral and contralateral pars triangularis, ipsilateral pars opercularis and superior temporal gyrus, and contralateral angular gyrus when compared with low responders. INTERPRETATION An account of these findings incorporates primarily proximal connectivity restoration, but also potentially reflects select contralateral compensatory reorganization. The latter is often associated with chronic recovery, reflecting the transitional nature of the subacute period.
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Affiliation(s)
- Melissa D. Stockbridge
- Department of NeurologyJohns Hopkins University School of MedicineBaltimore21287MarylandUSA
| | - Andreia V. Faria
- Department of Radiology and Radiological ScienceJohns Hopkins University School of MedicineBaltimore21287MarylandUSA
| | - Julius Fridriksson
- Department of Communication Sciences and DisordersUniversity of South CarolinaColumbia29208South CarolinaUSA
| | - Chris Rorden
- Department of Communication Sciences and DisordersUniversity of South CarolinaColumbia29208South CarolinaUSA
| | - Leonardo Bonilha
- Department of NeurologyEmory University School of MedicineAtlanta30322GeorgiaUSA
| | - Argye E. Hillis
- Department of NeurologyJohns Hopkins University School of MedicineBaltimore21287MarylandUSA
- Department of Physical Medicine and RehabilitationJohns Hopkins University School of MedicineBaltimore21287MarylandUSA
- Department of Cognitive Science, Krieger School of Arts and SciencesJohns Hopkins UniversityBaltimore21218MarylandUSA
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Murphy E. ROSE: A Neurocomputational Architecture for Syntax. ARXIV 2023:arXiv:2303.08877v1. [PMID: 36994166 PMCID: PMC10055479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
A comprehensive model of natural language processing in the brain must accommodate four components: representations, operations, structures and encoding. It further requires a principled account of how these different components mechanistically, and causally, relate to each another. While previous models have isolated regions of interest for structure-building and lexical access, and have utilized specific neural recording measures to expose possible signatures of syntax, many gaps remain with respect to bridging distinct scales of analysis that map onto these four components. By expanding existing accounts of how neural oscillations can index various linguistic processes, this article proposes a neurocomputational architecture for syntax, termed the ROSE model (Representation, Operation, Structure, Encoding). Under ROSE, the basic data structures of syntax are atomic features, types of mental representations (R), and are coded at the single-unit and ensemble level. Elementary computations (O) that transform these units into manipulable objects accessible to subsequent structure-building levels are coded via high frequency broadband γ activity. Low frequency synchronization and cross-frequency coupling code for recursive categorial inferences (S). Distinct forms of low frequency coupling and phase-amplitude coupling (δ-θ coupling via pSTS-IFG; θ-γ coupling via IFG to conceptual hubs in lateral and ventral temporal cortex) then encode these structures onto distinct workspaces (E). Causally connecting R to O is spike-phase/LFP coupling; connecting O to S is phase-amplitude coupling; connecting S to E is a system of frontotemporal traveling oscillations; connecting E back to lower levels is low-frequency phase resetting of spike-LFP coupling. This compositional neural code has important implications for algorithmic accounts, since it makes concrete predictions for the appropriate level of study for psycholinguistic parsing models. ROSE is reliant on neurophysiologically plausible mechanisms, is supported at all four levels by a range of recent empirical research, and provides an anatomically precise and falsifiable grounding for the basic property of natural language syntax: hierarchical, recursive structure-building.
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Affiliation(s)
- Elliot Murphy
- Vivian L. Smith Department of Neurosurgery, McGovern Medical School, UTHealth, Houston, TX, USA
- Texas Institute for Restorative Neurotechnologies, UTHealth, Houston, TX, USA
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