1
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Gori S, Peverelli M, Bertoni S, Ruffino M, Ronconi L, Molteni F, Priftis K, Facoetti A. The engagement of temporal attention in left spatial neglect. Cortex 2024; 178:201-212. [PMID: 39024938 DOI: 10.1016/j.cortex.2024.06.010] [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: 02/12/2024] [Revised: 05/02/2024] [Accepted: 06/18/2024] [Indexed: 07/20/2024]
Abstract
Previous literature showed how left spatial neglect arises from an asymmetrical distribution of spatial attention. However, it was also suggested that left spatial neglect might be partially caused or at least worsened by non-spatial attention disorders of the right-lateralized stimulus-driven attentional fronto-parietal network. Here, we psychophysically tested the efficiency of temporal attentional engagement of foveal perception through meta-contrast (Experiment 1) and "attentional" masking (Experiment 2) tasks in patients with right-hemisphere stroke with left neglect (N+), without left neglect (N-) and matched healthy controls (C). In both experiments, N+ patients showed higher thresholds, not only than Cs, but also than N- patients. Temporal engagement was clinically impaired in all N+ patients and highly correlated with their typical inability to direct spatial attention towards stimuli on the left side. Our findings suggest that a temporal impairment of attentional engagement is a relevant deficit of left spatial neglect.
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Affiliation(s)
- Simone Gori
- Department of Human and Social Sciences, University of Bergamo, Bergamo, Italy.
| | - Milena Peverelli
- "Villa Beretta" Rehabilitation Center, Costamasnaga (LC), "Valduce" Hospital (CO), Italy
| | - Sara Bertoni
- Department of Human and Social Sciences, University of Bergamo, Bergamo, Italy; Developmental and Cognitive Neuroscience Lab, General Psychology Department, University of Padova, Italy
| | - Milena Ruffino
- Servizio di Neuropsichiatria dell'Infanzia e dell'Adolescenza, Saronno ASST Valle Olona (VA), Italy
| | - Luca Ronconi
- School of Psychology, Vita-Salute San Raffaele University, Milan, Italy; Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Franco Molteni
- "Villa Beretta" Rehabilitation Center, Costamasnaga (LC), "Valduce" Hospital (CO), Italy
| | - Konstantinos Priftis
- Human Inspired Technology Research Centre, University of Padova, Italy; General Psychology Department, University of Padova, Italy
| | - Andrea Facoetti
- Developmental and Cognitive Neuroscience Lab, General Psychology Department, University of Padova, Italy.
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2
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Burkhardt M, Bergelt J, Gönner L, Dinkelbach HÜ, Beuth F, Schwarz A, Bicanski A, Burgess N, Hamker FH. A large-scale neurocomputational model of spatial cognition integrating memory with vision. Neural Netw 2023; 167:473-488. [PMID: 37688954 DOI: 10.1016/j.neunet.2023.08.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 06/29/2023] [Accepted: 08/20/2023] [Indexed: 09/11/2023]
Abstract
We introduce a large-scale neurocomputational model of spatial cognition called 'Spacecog', which integrates recent findings from mechanistic models of visual and spatial perception. As a high-level cognitive ability, spatial cognition requires the processing of behaviourally relevant features in complex environments and, importantly, the updating of this information during processes of eye and body movement. The Spacecog model achieves this by interfacing spatial memory and imagery with mechanisms of object localisation, saccade execution, and attention through coordinate transformations in parietal areas of the brain. We evaluate the model in a realistic virtual environment where our neurocognitive model steers an agent to perform complex visuospatial tasks. Our modelling approach opens up new possibilities in the assessment of neuropsychological data and human spatial cognition.
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Affiliation(s)
| | - Julia Bergelt
- Chemnitz University of Technology, 09107, Chemnitz Germany.
| | - Lorenz Gönner
- Technische Universität Dresden, Faculty of Psychology, 01062, Dresden Germany; Technische Universität Dresden, Department of Psychiatry, 01307, Dresden Germany.
| | | | - Frederik Beuth
- Chemnitz University of Technology, 09107, Chemnitz Germany.
| | - Alex Schwarz
- Chemnitz University of Technology, 09107, Chemnitz Germany.
| | - Andrej Bicanski
- Newcastle University, NE1 7RU, Newcastle upon Tyne United Kingdom.
| | - Neil Burgess
- University College London, WC1E 6BT, London United Kingdom.
| | - Fred H Hamker
- Chemnitz University of Technology, 09107, Chemnitz Germany.
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3
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Liu J, Bayle DJ, Spagna A, Sitt JD, Bourgeois A, Lehongre K, Fernandez-Vidal S, Adam C, Lambrecq V, Navarro V, Seidel Malkinson T, Bartolomeo P. Fronto-parietal networks shape human conscious report through attention gain and reorienting. Commun Biol 2023; 6:730. [PMID: 37454150 PMCID: PMC10349830 DOI: 10.1038/s42003-023-05108-2] [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: 04/28/2023] [Accepted: 07/06/2023] [Indexed: 07/18/2023] Open
Abstract
How do attention and consciousness interact in the human brain? Rival theories of consciousness disagree on the role of fronto-parietal attentional networks in conscious perception. We recorded neural activity from 727 intracerebral contacts in 13 epileptic patients, while they detected near-threshold targets preceded by attentional cues. Clustering revealed three neural patterns: first, attention-enhanced conscious report accompanied sustained right-hemisphere fronto-temporal activity in networks connected by the superior longitudinal fasciculus (SLF) II-III, and late accumulation of activity (>300 ms post-target) in bilateral dorso-prefrontal and right-hemisphere orbitofrontal cortex (SLF I-III). Second, attentional reorienting affected conscious report through early, sustained activity in a right-hemisphere network (SLF III). Third, conscious report accompanied left-hemisphere dorsolateral-prefrontal activity. Task modeling with recurrent neural networks revealed multiple clusters matching the identified brain clusters, elucidating the causal relationship between clusters in conscious perception of near-threshold targets. Thus, distinct, hemisphere-asymmetric fronto-parietal networks support attentional gain and reorienting in shaping human conscious experience.
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Affiliation(s)
- Jianghao Liu
- Sorbonne Université, Inserm, CNRS, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, 75013, Paris, France.
- Dassault Systèmes, Vélizy-Villacoublay, France.
| | | | - Alfredo Spagna
- Sorbonne Université, Inserm, CNRS, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, 75013, Paris, France
- Department of Psychology, Columbia University in the City of New York, New York, NY, 10027, USA
| | - Jacobo D Sitt
- Sorbonne Université, Inserm, CNRS, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, 75013, Paris, France
| | - Alexia Bourgeois
- Laboratory of Cognitive Neurorehabilitation, Faculty of Medicine, University of Geneva, 1206, Geneva, Switzerland
| | - Katia Lehongre
- CENIR - Centre de Neuro-Imagerie de Recherche, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, 75013, Paris, France
| | - Sara Fernandez-Vidal
- CENIR - Centre de Neuro-Imagerie de Recherche, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, 75013, Paris, France
| | - Claude Adam
- Epilepsy Unit, AP-HP, Pitié-Salpêtrière Hospital, 75013, Paris, France
| | - Virginie Lambrecq
- Sorbonne Université, Inserm, CNRS, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, 75013, Paris, France
- Epilepsy Unit, AP-HP, Pitié-Salpêtrière Hospital, 75013, Paris, France
- Clinical Neurophysiology Department, AP-HP, Pitié-Salpêtrière Hospital, 75013, Paris, France
| | - Vincent Navarro
- Sorbonne Université, Inserm, CNRS, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, 75013, Paris, France
- Epilepsy Unit, AP-HP, Pitié-Salpêtrière Hospital, 75013, Paris, France
- Clinical Neurophysiology Department, AP-HP, Pitié-Salpêtrière Hospital, 75013, Paris, France
| | - Tal Seidel Malkinson
- Sorbonne Université, Inserm, CNRS, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, 75013, Paris, France.
- CNRS, CRAN, Université de Lorraine, F-54000, Nancy, France.
| | - Paolo Bartolomeo
- Sorbonne Université, Inserm, CNRS, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, 75013, Paris, France.
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4
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Sani I. The missing link among the functions of the temporo-parietal junction: Comment on "Left and right temporal-parietal junctions (TPJs) as "match/mismatch" hedonic machines: A unifying account of TPJ function" by Doricchi et al. Phys Life Rev 2023; 44:9-12. [PMID: 36462346 DOI: 10.1016/j.plrev.2022.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 11/27/2022]
Affiliation(s)
- Ilaria Sani
- Department of Basic Neurosciences, Faculty of Medicine, University of Geneva, Chemin de mines 9, 1202, Geneva, CH, Switzerland.
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5
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Gainotti G. Some historical notes orienting towards brain mechanisms that could underlie hemispheric asymmetries. Cortex 2023; 163:26-41. [PMID: 37054549 DOI: 10.1016/j.cortex.2023.03.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 03/07/2023] [Accepted: 03/14/2023] [Indexed: 04/05/2023]
Abstract
The first minor aim of this synthetical historical survey consisted in showing that the discovery of the internal organization of language within the left hemisphere has been mainly determined by theoretical models and cultural factors, whereas the discovery of the left lateralisation of language and of the right lateralization of emotions and of other cognitive and perceptual functions has been mainly determined by empirical observations. A second more relevant aim of the survey consisted in discussing historical and more recent data suggesting that the different lateralisation of language and emotions has influenced not only the asymmetrical representation of other cognitive, affective and perceptual functions, but also (thank to the shaping influence of language on human cognition) of asymmetries regarding more general aspects of thought (such as the distinctions between 'propositional vs automatic' and 'conscious vs unconscious' ways of functioning). In the last part of the review, these data will be included in a more general discussion, concerning the brain functions that could be subsumed by the right hemisphere for three main reasons: (a) to avoid conflicts with the language mediated activities of the left hemisphere; (b) because of unconscious and automatic aspects of its non-verbal organisation or (c) due to the competition for cortical space determined by the development of language within the left hemisphere.
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Affiliation(s)
- Guido Gainotti
- Institute of Neurology, Catholic University of the Sacred Heart, Roma, Italy.
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6
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Kaufmann BC, Cazzoli D, Pastore-Wapp M, Vanbellingen T, Pflugshaupt T, Bauer D, Müri RM, Nef T, Bartolomeo P, Nyffeler T. Joint impact on attention, alertness and inhibition of lesions at a frontal white matter crossroad. Brain 2022; 146:1467-1482. [PMID: 36200399 PMCID: PMC10115237 DOI: 10.1093/brain/awac359] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 08/26/2022] [Accepted: 09/01/2022] [Indexed: 11/13/2022] Open
Abstract
In everyday life, information from different cognitive domains - such as visuospatial attention, alertness, and inhibition - needs to be integrated between different brain regions. Early models suggested that completely segregated brain networks control these three cognitive domains. However, more recent accounts, mainly based on neuroimaging data in healthy participants, indicate that different tasks lead to specific patterns of activation within the same, higher-order and "multiple-demand" network. If so, then a lesion to critical substrates of this common network should determine a concomitant impairment in all three cognitive domains. The aim of the present study was to critically investigate this hypothesis, i.e., to identify focal stroke lesions within the network that can concomitantly impact visuospatial attention, alertness and inhibition. We studied an unselected sample of 60 first-ever right-hemispheric, subacute stroke patients using a data-driven, bottom-up approach. Patients performed 12 standardized neuropsychological and oculomotor tests, four per cognitive domain. Principal component analyses revealed a strong relationship between all three cognitive domains: 10 of 12 tests loaded on a first, Common Component. Analysis of the neuroanatomical lesion correlates using different approaches (i.e., Voxel-Based and Tractwise Lesion-Symptom Mapping, Disconnectome maps) provided convergent evidence on the association between severe impairment of this Common Component and lesions at the intersection of Superior Longitudinal Fasciculus II and III, Frontal Aslant Tract and, to a lesser extent, the Putamen and Inferior Fronto-Occipital Fasciculus. Moreover, patients with a lesion involving this region were significantly more impaired in daily living cognition, which provides an ecological validation of our results. A probabilistic functional atlas of the multiple-demand network was performed to confirm the potential relationship between patients' lesion substrates and observed cognitive impairments as a function of the MD-network connectivity disruption. These findings show, for the first time, that a lesion to a specific white matter crossroad can determine a concurrent breakdown in all three considered cognitive domains. Our results support the multiple-demand network model, proposing that different cognitive operations depend on specific collaborators and their interaction, within the same underlying neural network. Our findings also extend this hypothesis by showing (1) the contribution of SLF and FAT to the multiple-demand network, and (2) a critical neuroanatomical intersection, crossed by a vast amount of long-range white matter tracts, many of which interconnect cortical areas of the multiple-demand network. The vulnerability of this crossroad to stroke has specific cognitive and clinical consequences; this has the potential to influence future rehabilitative approaches.
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Affiliation(s)
- Brigitte C Kaufmann
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute - ICM, Inserm, CNRS, Paris, France.,Neurocenter, Luzerner Kantonsspital, 6000 Lucerne, Switzerland
| | - Dario Cazzoli
- Neurocenter, Luzerner Kantonsspital, 6000 Lucerne, Switzerland.,ARTORG Center for Biomedical Engineering Research, Gerontechnology and Rehabilitation, University of Bern, 3008 Bern, Switzerland.,Department of Psychology, University of Bern, Bern, Switzerland
| | - Manuela Pastore-Wapp
- Neurocenter, Luzerner Kantonsspital, 6000 Lucerne, Switzerland.,ARTORG Center for Biomedical Engineering Research, Gerontechnology and Rehabilitation, University of Bern, 3008 Bern, Switzerland
| | - Tim Vanbellingen
- Neurocenter, Luzerner Kantonsspital, 6000 Lucerne, Switzerland.,ARTORG Center for Biomedical Engineering Research, Gerontechnology and Rehabilitation, University of Bern, 3008 Bern, Switzerland
| | | | - Daniel Bauer
- Neurocenter, Luzerner Kantonsspital, 6000 Lucerne, Switzerland
| | - René M Müri
- ARTORG Center for Biomedical Engineering Research, Gerontechnology and Rehabilitation, University of Bern, 3008 Bern, Switzerland.,Department of Neurology, Inselspital, University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Tobias Nef
- ARTORG Center for Biomedical Engineering Research, Gerontechnology and Rehabilitation, University of Bern, 3008 Bern, Switzerland
| | - Paolo Bartolomeo
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute - ICM, Inserm, CNRS, Paris, France
| | - Thomas Nyffeler
- Neurocenter, Luzerner Kantonsspital, 6000 Lucerne, Switzerland.,ARTORG Center for Biomedical Engineering Research, Gerontechnology and Rehabilitation, University of Bern, 3008 Bern, Switzerland.,Department of Neurology, Inselspital, University Hospital, University of Bern, 3010 Bern, Switzerland
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7
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Doricchi F, Lasaponara S, Pazzaglia M, Silvetti M. Left and right temporal-parietal junctions (TPJs) as "match/mismatch" hedonic machines: A unifying account of TPJ function. Phys Life Rev 2022; 42:56-92. [PMID: 35901654 DOI: 10.1016/j.plrev.2022.07.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 07/06/2022] [Indexed: 11/17/2022]
Abstract
Experimental and theoretical studies have tried to gain insights into the involvement of the Temporal Parietal Junction (TPJ) in a broad range of cognitive functions like memory, attention, language, self-agency and theory of mind. Recent investigations have demonstrated the partition of the TPJ in discrete subsectors. Nonetheless, whether these subsectors play different roles or implement an overarching function remains debated. Here, based on a review of available evidence, we propose that the left TPJ codes both matches and mismatches between expected and actual sensory, motor, or cognitive events while the right TPJ codes mismatches. These operations help keeping track of statistical contingencies in personal, environmental, and conceptual space. We show that this hypothesis can account for the participation of the TPJ in disparate cognitive functions, including "humour", and explain: a) the higher incidence of spatial neglect in right brain damage; b) the different emotional reactions that follow left and right brain damage; c) the hemispheric lateralisation of optimistic bias mechanisms; d) the lateralisation of mechanisms that regulate routine and novelty behaviours. We propose that match and mismatch operations are aimed at approximating "free energy", in terms of the free energy principle of decision-making. By approximating "free energy", the match/mismatch TPJ system supports both information seeking to update one's own beliefs and the pleasure of being right in one's own' current choices. This renewed view of the TPJ has relevant clinical implications because the misfunctioning of TPJ-related "match" and "mismatch" circuits in unilateral brain damage can produce low-dimensional deficits of active-inference and predictive coding that can be associated with different neuropsychological disorders.
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Affiliation(s)
- Fabrizio Doricchi
- Dipartimento di Psicologia 39, Università degli Studi di Roma 'La Sapienza', Roma, Italy; Fondazione Santa Lucia IRCCS, Roma, Italy.
| | - Stefano Lasaponara
- Dipartimento di Psicologia 39, Università degli Studi di Roma 'La Sapienza', Roma, Italy; Fondazione Santa Lucia IRCCS, Roma, Italy
| | - Mariella Pazzaglia
- Dipartimento di Psicologia 39, Università degli Studi di Roma 'La Sapienza', Roma, Italy; Fondazione Santa Lucia IRCCS, Roma, Italy
| | - Massimo Silvetti
- Computational and Translational Neuroscience Lab (CTNLab), Institute of Cognitive Sciences and Technologies, National Research Council (CNR), Rome, Italy
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8
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Argiuolo A, Somma F, Bartolomeo P, Gigliotta O, Ponticorvo M. Indexes for the E-Baking Tray Task: A Look on Laterality, Verticality and Quality of Exploration. Brain Sci 2022; 12:brainsci12030401. [PMID: 35326356 PMCID: PMC8946214 DOI: 10.3390/brainsci12030401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/14/2022] [Accepted: 03/15/2022] [Indexed: 12/01/2022] Open
Abstract
The Baking Tray Task is an ecological task developed for the assessment of unilateral neglect that can also be used for research on neurotypical participants. In this task, participants are asked to place 16 objects inside a board as evenly as possible. In the case of impaired spatial exploration, consequent to right attentional networks damage, asymmetrical object disposition is observed as more objects are placed on the ipsilesional side (typically the right side). The E-BTT is a technology-enhanced version of the Baking Tray Task, implemented with a software platform, E-TAN, which detects the objects and automatically computes their spatial coordinates. This allows a complement to the traditional scoring methods with new measures to extract richer information from the data. In this study, we focus on neurotypical participants to explore if some new indexes, derived from the literature review on similar tasks, can be applied to BTT and E-BTT for research aims. A principal component analysis (PCA) was then performed to verify if these new indexes reflect some common dimensions. Results indicate the emergence of two principal dimensions: spatiality, which summarizes both laterality and verticality, and quality, which regards the explored space and (dis)organization in placing the items.
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Affiliation(s)
- Antonietta Argiuolo
- Natural and Artificial Cognition Laboratory, Department of Humanistic Studies, University of Naples Federico II, 80133 Naples, Italy; (F.S.); (O.G.); (M.P.)
- Correspondence:
| | - Federica Somma
- Natural and Artificial Cognition Laboratory, Department of Humanistic Studies, University of Naples Federico II, 80133 Naples, Italy; (F.S.); (O.G.); (M.P.)
| | - Paolo Bartolomeo
- Institut du Cerveau—Paris Brain Institute—ICM, Inserm, Hôpital de la Pitié Salpêtrière, Sorbonne Université, 75013 Paris, France;
| | - Onofrio Gigliotta
- Natural and Artificial Cognition Laboratory, Department of Humanistic Studies, University of Naples Federico II, 80133 Naples, Italy; (F.S.); (O.G.); (M.P.)
| | - Michela Ponticorvo
- Natural and Artificial Cognition Laboratory, Department of Humanistic Studies, University of Naples Federico II, 80133 Naples, Italy; (F.S.); (O.G.); (M.P.)
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9
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Frigato G. The Neural Correlates of Access Consciousness and Phenomenal Consciousness Seem to Coincide and Would Correspond to a Memory Center, an Activation Center and Eight Parallel Convergence Centers. Front Psychol 2021; 12:749610. [PMID: 34659068 PMCID: PMC8511498 DOI: 10.3389/fpsyg.2021.749610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 09/01/2021] [Indexed: 11/23/2022] Open
Abstract
An increasing number of authors suggest that the neural correlates of consciousness (NCC) have no selective, executive, or metacognitive function. It is believed that attention unconsciously selects the contents that will become conscious. Consciousness would have only the fundamental function of transforming the selected contents into a format easily used by high-level processors, such as working memory, language, or autobiographical memory. According to Dehaene, the neural correlates (NC) of access consciousness (AC; cognitive consciousness) constitute a widespread network in the frontal, parietal, and temporal cortices. While Tononi localized the correlates of phenomenal consciousness (PC; subjective consciousness) to a posterior “hot zone” in the temporo-parietal cortex. A careful examination of the works of these two groups leads to the conclusion that the correlates of access and PC coincide. The two consciousnesses are therefore two faces of the same single consciousness with both its cognitive and subjective contents. A review of the literature of the pathology called “neglect” confirms that the common correlates include 10: a memory center, an activation center, and eight parallel centers. From study of the “imagery” it can be deduced that these eight parallel centers would operate as points of convergence in the third person linking the respective eight sensory-motor-emotional areas activated by external perceptions and the corresponding memories of these perceptions deposited in the memory center. The first four centers of convergence appear in the most evolved fish and gradually reach eight in humans.
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10
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Bartolomeo P. From competition to cooperation: Visual neglect across the hemispheres. Rev Neurol (Paris) 2021; 177:1104-1111. [PMID: 34561121 DOI: 10.1016/j.neurol.2021.07.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 07/23/2021] [Indexed: 12/13/2022]
Abstract
Visuospatial neglect is a frequent and disabling consequence of injuries to the right hemisphere. Patients with neglect show signs of impaired attention for left-sided events, which depends on dysfunction of fronto-parietal networks. After unilateral injury, such as stroke, these networks and their contralateral homologs can reorganize following multiple potential trajectories, which can be either adaptive or maladaptive. This article presents possible factors influencing the profile of evolution of neglect towards recovery or chronicity, and highlights potential mechanisms that may constrain these processes in time and space. The integrity of white matter pathways within and between the hemisphere appears to pose crucial connectivity constraints for compensatory brain plasticity from remote brain regions. Specifically, the availability of a sufficient degree of inter-hemispheric connectivity might be critical to shift the role of the undamaged left hemisphere in spatial neglect, from exerting maladaptive effects, to promoting compensatory activity.
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Affiliation(s)
- P Bartolomeo
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute - ICM, Inserm, CNRS, AP-HP, hôpital de la Pitié-Salpêtrière, 75013 Paris, France.
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11
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Cerrato A, Pacella D, Palumbo F, Beauvais D, Ponticorvo M, Miglino O, Bartolomeo P. E-TAN, a technology-enhanced platform with tangible objects for the assessment of visual neglect: A multiple single-case study. Neuropsychol Rehabil 2021; 31:1130-1144. [PMID: 32419607 DOI: 10.1080/09602011.2020.1762671] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Visual neglect is a frequent and disabling consequence of right brain damage. Traditional paper-and pencil tests of neglect have limited sensitivity and ecological validity. The Baking Tray Task (BTT), instead, approaches real-life situations, because it requires participants to place 16 physical objects on a board. The number of objects placed on the left and right portions of the board provides a clinical index of visual neglect. Here we present E-TAN, a technology-enhanced platform for BTT (E-BTT). E-BTT automatically determines the object locations on the board, and also records the sequence and timing of their placement. We used E-BTT to test 9 patients with right hemisphere damage and compared their performance with that obtained by 115 healthy participants. To this end, we developed a new method of analysis of participants' performance, based on the use of the convex hull described by the objects on the board. This measure provides an estimate of the portion of space processed by each participant and can effectively discriminate neglect patients from patients without neglect. E-TAN allows clinicians to assess visuospatial performance by using a convenient, fast, and relatively automatized procedure, that patients can even perform at home to follow-up the effects of rehabilitation.
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Affiliation(s)
- Antonio Cerrato
- Departments of Humanities and Political Sciences, University of Naples Federico II, Naples, Italy
| | - Daniela Pacella
- Departments of Humanities and Political Sciences, University of Naples Federico II, Naples, Italy
| | - Francesco Palumbo
- Departments of Humanities and Political Sciences, University of Naples Federico II, Naples, Italy
| | - Diane Beauvais
- Inserm U 1127, CNRS UMR 7225, Sorbonne Université, Paris Brain Institute, ICM Hôpital de la Pitié-Salpêtrière, Paris, France
| | - Michela Ponticorvo
- Departments of Humanities and Political Sciences, University of Naples Federico II, Naples, Italy
| | - Orazio Miglino
- Departments of Humanities and Political Sciences, University of Naples Federico II, Naples, Italy.,Institute of Cognitive Sciences and Technologies, National Research Council, Rome, Italy
| | - Paolo Bartolomeo
- Inserm U 1127, CNRS UMR 7225, Sorbonne Université, Paris Brain Institute, ICM Hôpital de la Pitié-Salpêtrière, Paris, France
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12
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Adam R, Schaeffer DJ, Johnston K, Menon RS, Everling S. Structural alterations in cortical and thalamocortical white matter tracts after recovery from prefrontal cortex lesions in macaques. Neuroimage 2021; 232:117919. [PMID: 33652141 DOI: 10.1016/j.neuroimage.2021.117919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 02/19/2021] [Accepted: 02/22/2021] [Indexed: 01/04/2023] Open
Abstract
Unilateral damage to the frontoparietal network typically impairs saccade target selection within the contralesional visual hemifield. Severity of deficits and the degree of recovery have been associated with widespread network dysfunction, yet it is not clear how these behavioural and functional brain changes relate with the underlying structural white matter tracts. Here, we investigated whether recovery after unilateral prefrontal cortex (PFC) lesions was associated with changes in white matter microstructure across large-scale frontoparietal cortical and thalamocortical networks. Diffusion-weighted imaging was acquired in four male rhesus macaques at pre-lesion, week 1, and week 8-16 post-lesion when target selection deficits largely recovered. Probabilistic tractography was used to reconstruct cortical frontoparietal fiber tracts, including the superior longitudinal fasciculus (SLF) and transcallosal fibers connecting the PFC or posterior parietal cortex (PPC), as well as thalamocortical fiber tracts connecting the PFC and PPC to thalamic nuclei. We found that the two animals with small PFC lesions showed increased fractional anisotropy in both cortical and thalamocortical fiber tracts when behaviour had recovered. However, we found that fractional anisotropy decreased in cortical frontoparietal tracts after larger PFC lesions yet increased in some thalamocortical tracts at the time of behavioural recovery. These findings indicate that behavioural recovery after small PFC lesions may be supported by both cortical and subcortical areas, whereas larger PFC lesions may have induced widespread structural damage and hindered compensatory remodeling in the cortical frontoparietal network.
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Affiliation(s)
- Ramina Adam
- Graduate Program in Neuroscience, University of Western Ontario, London, Canada; Robarts Research Institute, University of Western Ontario, London, Canada; The Brain and Mind Institute, University of Western Ontario, London, Canada
| | - David J Schaeffer
- Department of Neurobiology, University of Pittsburgh, PA, United States
| | - Kevin Johnston
- The Brain and Mind Institute, University of Western Ontario, London, Canada; Department of Physiology and Pharmacology, University of Western Ontario, London, Canada
| | - Ravi S Menon
- Robarts Research Institute, University of Western Ontario, London, Canada; The Brain and Mind Institute, University of Western Ontario, London, Canada; Department of Medical Biophysics, University of Western Ontario, London, Canada
| | - Stefan Everling
- Graduate Program in Neuroscience, University of Western Ontario, London, Canada; Robarts Research Institute, University of Western Ontario, London, Canada; The Brain and Mind Institute, University of Western Ontario, London, Canada; Department of Physiology and Pharmacology, University of Western Ontario, London, Canada.
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13
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Bartolomeo P. Visual and motor neglect: Clinical and neurocognitive aspects. Rev Neurol (Paris) 2021; 177:619-626. [PMID: 33455830 DOI: 10.1016/j.neurol.2020.09.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 09/17/2020] [Indexed: 11/19/2022]
Abstract
Attention allows us to prioritize the processing of external information according to our goals, but also to cope with sudden, unforeseen events. Attention processes rely on the coordinated activity of large-scale brain networks. At the cortical level, these systems are mainly organized in fronto-parietal networks, with functional and anatomical asymmetries in favor of the right hemisphere. Dysfunction of these right-lateralized networks often produce severe deficit of spatial attention, such as visual neglect. Other brain-damaged patients avoid moving the limbs contralateral to their brain lesion, even in the absence of sensorimotor deficits (motor neglect). This paper first summarizes past and current evidence on brain networks of attention; then, it presents clinical and experimental findings on visual and motor neglect, and on the possible mechanisms of clinical recovery.
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Affiliation(s)
- P Bartolomeo
- Sorbonne Université, Institut du Cerveau, Paris Brain Institute, ICM, Inserm, CNRS, Hôpital de la Pitié-Salpêtrière, 75013 Paris, France.
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14
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Spagna A, Hajhajate D, Liu J, Bartolomeo P. Visual mental imagery engages the left fusiform gyrus, but not the early visual cortex: A meta-analysis of neuroimaging evidence. Neurosci Biobehav Rev 2021; 122:201-217. [PMID: 33422567 DOI: 10.1016/j.neubiorev.2020.12.029] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 12/03/2020] [Accepted: 12/23/2020] [Indexed: 12/13/2022]
Abstract
The dominant neural model of visual mental imagery (VMI) stipulates that memories from the medial temporal lobe acquire sensory features in early visual areas. However, neurological patients with damage restricted to the occipital cortex typically show perfectly vivid VMI, while more anterior damages extending into the temporal lobe, especially in the left hemisphere, often cause VMI impairments. Here we present two major results reconciling neuroimaging findings in neurotypical subjects with the performance of brain-damaged patients: (1) A large-scale meta-analysis of 46 fMRI studies, of which 27 investigated specifically visual mental imagery, revealed that VMI engages fronto-parietal networks and a well-delimited region in the left fusiform gyrus. (2) A Bayesian analysis showed no evidence for imagery-related activity in early visual cortices. We propose a revised neural model of VMI that draws inspiration from recent cytoarchitectonic and lesion studies, whereby fronto-parietal networks initiate, modulate, and maintain activity in a core temporal network centered on the fusiform imagery node, a high-level visual region in the left fusiform gyrus.
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Affiliation(s)
- Alfredo Spagna
- Department of Psychology, Columbia University in the City of New York, NY, 10027, USA; Sorbonne Université, Inserm U 1127, CNRS UMR 7225, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, F-75013, Paris, France
| | - Dounia Hajhajate
- Sorbonne Université, Inserm U 1127, CNRS UMR 7225, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, F-75013, Paris, France
| | - Jianghao Liu
- Sorbonne Université, Inserm U 1127, CNRS UMR 7225, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, F-75013, Paris, France; Dassault Systèmes, Vélizy-Villacoublay, France
| | - Paolo Bartolomeo
- Sorbonne Université, Inserm U 1127, CNRS UMR 7225, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, F-75013, Paris, France.
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15
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Lesch H, Schoenfeld MA, Merkel C. Functional dissociation of multiple-object tracking mechanisms based on hemispheric asymmetries. Restor Neurol Neurosci 2020; 38:443-453. [PMID: 33325416 DOI: 10.3233/rnn-201048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND A number of theoretical accounts have been put forward to explain the ability to simultaneously track multiple visually indistinguishable objects over a period of time. Serial processing models of visual tracking focus on the maintenance of the spatial locations of every single item over time. A more recent mechanism describes multiple object tracking as the ability to maintain a higher order representation of an abstract spatial configuration built by the illusory connection of the tracked items through their transition. OBJECTIVE The current study investigates the correspondence between these serial and parallel tracking accounts and the right hemispheric specialization for the space-based vs. left hemispheric for object-based attentional processing. METHODS Electrophysiological brain responses were recorded in two groups of patients with right- and left hemispheric lesions while performing in a multiple object tracking task. RESULTS The results suggest a failure to distinguish single item information for the right hemispheric patients accompanied by the absence of a known electrophysiological marker associated with single item tracking. Importantly, left hemispheric patients showed a graded behavioral and electrophysiological response to probe stimuli as a function of the congruence of the probe with the relevant target stimuli. CONCLUSIONS The current data suggest that the differential contribution of serial and parallel tracking mechanisms during object tracking can partly be explained by the different functional contributions of the right and left brain hemispheres.
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Affiliation(s)
| | - Mircea Ariel Schoenfeld
- Kliniken Schmieder, Heidelberg, Germany.,Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany.,Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Magdeburg, Germany
| | - Christian Merkel
- Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany
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16
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Russell-Giller S, Wu T, Spagna A, Dhamoon M, Hao Q, Fan J. Impact of unilateral stroke on right hemisphere superiority in executive control. Neuropsychologia 2020; 150:107693. [PMID: 33238172 DOI: 10.1016/j.neuropsychologia.2020.107693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 10/16/2020] [Accepted: 11/18/2020] [Indexed: 11/19/2022]
Abstract
In our previous study, we have demonstrated a right hemisphere superiority in executive control of attention, with the right hemisphere being more efficient in dealing with conflict for stimuli presented in the left visual field. However, the unique and synergetic contribution of the two hemispheres to this superiority effect is still elusive. Here, using the lateralized attention network test, we compared the flanker conflict effect for stimuli presented in the left and right visual fields in patients with an ischemic stroke in the right or left hemisphere as the unilateral lesion groups and in patients with a transient ischemic attack without an acute infarction as the control group. In contrast to the transient ischemic attack group, which demonstrated a right hemisphere superiority in conflict processing, there was no evidence for such an effect in both unilateral stroke groups. These results can be explained by our model proposing that there is bilateral hemispheric involvement for conflict processing for information received from the left visual field and unilateral hemispheric involvement for conflict processing for information received from the right visual field, resulting in more efficient processing for the left visual field, i.e., the right hemisphere superiority effect. When there is damage to either hemisphere, the responsibility of conflict processing will largely fall on the intact hemisphere, eliminating the right hemisphere superiority effect.
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Affiliation(s)
- Shira Russell-Giller
- Department of Psychology, Queens College, The City University of New York, Queens, NY, USA; Department of Psychology, The Graduate Center, The City University of New York, New York, NY, USA; Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Tingting Wu
- Department of Psychology, Queens College, The City University of New York, Queens, NY, USA
| | - Alfredo Spagna
- Department of Psychology, Columbia University in the City of New York, New York, NY, USA
| | - Mandip Dhamoon
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Qing Hao
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jin Fan
- Department of Psychology, Queens College, The City University of New York, Queens, NY, USA.
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17
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Toba MN, Zavaglia M, Malherbe C, Moreau T, Rastelli F, Kaglik A, Valabrègue R, Pradat-Diehl P, Hilgetag CC, Valero-Cabré A. Game theoretical mapping of white matter contributions to visuospatial attention in stroke patients with hemineglect. Hum Brain Mapp 2020; 41:2926-2950. [PMID: 32243676 PMCID: PMC7336155 DOI: 10.1002/hbm.24987] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 02/24/2020] [Accepted: 03/06/2020] [Indexed: 01/19/2023] Open
Abstract
White matter bundles linking gray matter nodes are key anatomical players to fully characterize associations between brain systems and cognitive functions. Here we used a multivariate lesion inference approach grounded in coalitional game theory (multiperturbation Shapley value analysis, MSA) to infer causal contributions of white matter bundles to visuospatial orienting of attention. Our work is based on the characterization of the lesion patterns of 25 right hemisphere stroke patients and the causal analysis of their impact on three neuropsychological tasks: line bisection, letter cancellation, and bells cancellation. We report that, out of the 11 white matter bundles included in our MSA coalitions, the optic radiations, the inferior fronto-occipital fasciculus and the anterior cingulum were the only tracts to display task-invariant contributions (positive, positive, and negative, respectively) to the tasks. We also report task-dependent influences for the branches of the superior longitudinal fasciculus and the posterior cingulum. By extending prior findings to white matter tracts linking key gray matter nodes, we further characterize from a network perspective the anatomical basis of visual and attentional orienting processes. The knowledge about interactions patterns mediated by white matter tracts linking cortical nodes of attention orienting networks, consolidated by further studies, may help develop and customize brain stimulation approaches for the rehabilitation of visuospatial neglect.
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Affiliation(s)
- Monica N Toba
- Cerebral Dynamics, Plasticity and Rehabilitation Team, Frontlab, Paris Brain Institute, ICM, Sorbonne Universités, UPMC Paris 06, Inserm UMR S 1127, CNRS UMR 7225, F-75013, & IHU-A-ICM, Paris, France.,Institute of Computational Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,AP-HP, HxU Pitié-Salpêtrière-Charles-Foix, service de Médecine Physique et de Réadaptation & PHRC Régional NEGLECT, Paris, France.,Laboratory of Functional Neurosciences (EA 4559), University of Picardie Jules Verne, Amiens, France
| | - Melissa Zavaglia
- Institute of Computational Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Jacobs University, Focus Area Health, Bremen, Germany
| | - Caroline Malherbe
- Institute of Computational Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Department of Neurology, Head and Neuro Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Tristan Moreau
- Cerebral Dynamics, Plasticity and Rehabilitation Team, Frontlab, Paris Brain Institute, ICM, Sorbonne Universités, UPMC Paris 06, Inserm UMR S 1127, CNRS UMR 7225, F-75013, & IHU-A-ICM, Paris, France
| | - Federica Rastelli
- Cerebral Dynamics, Plasticity and Rehabilitation Team, Frontlab, Paris Brain Institute, ICM, Sorbonne Universités, UPMC Paris 06, Inserm UMR S 1127, CNRS UMR 7225, F-75013, & IHU-A-ICM, Paris, France.,AP-HP, HxU Pitié-Salpêtrière-Charles-Foix, service de Médecine Physique et de Réadaptation & PHRC Régional NEGLECT, Paris, France
| | - Anna Kaglik
- Cerebral Dynamics, Plasticity and Rehabilitation Team, Frontlab, Paris Brain Institute, ICM, Sorbonne Universités, UPMC Paris 06, Inserm UMR S 1127, CNRS UMR 7225, F-75013, & IHU-A-ICM, Paris, France.,AP-HP, HxU Pitié-Salpêtrière-Charles-Foix, service de Médecine Physique et de Réadaptation & PHRC Régional NEGLECT, Paris, France
| | - Romain Valabrègue
- Centre for NeuroImaging Research-CENIR, Paris Brain Institute, ICM, Sorbonne Universités, Inserm UMR S 1127, CNRS UMR 7225, F-75013, Paris, France
| | - Pascale Pradat-Diehl
- AP-HP, HxU Pitié-Salpêtrière-Charles-Foix, service de Médecine Physique et de Réadaptation & PHRC Régional NEGLECT, Paris, France.,GRC-UPMC n° 18-Handicap cognitif et réadaptation, Paris, France
| | - Claus C Hilgetag
- Institute of Computational Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Department of Health Sciences, Boston University, 635 Commonwealth Ave., Boston, Massachusetts, 02215, USA
| | - Antoni Valero-Cabré
- Cerebral Dynamics, Plasticity and Rehabilitation Team, Frontlab, Paris Brain Institute, ICM, Sorbonne Universités, UPMC Paris 06, Inserm UMR S 1127, CNRS UMR 7225, F-75013, & IHU-A-ICM, Paris, France.,AP-HP, HxU Pitié-Salpêtrière-Charles-Foix, service de Médecine Physique et de Réadaptation & PHRC Régional NEGLECT, Paris, France.,Laboratory for Cerebral Dynamics, Plasticity & Rehabilitation, Boston University School of Medicine, Boston, Massachusetts, 02118, USA
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18
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Adam R, Johnston K, Menon RS, Everling S. Functional reorganization during the recovery of contralesional target selection deficits after prefrontal cortex lesions in macaque monkeys. Neuroimage 2020; 207:116339. [DOI: 10.1016/j.neuroimage.2019.116339] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 10/08/2019] [Accepted: 11/05/2019] [Indexed: 01/01/2023] Open
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19
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Spagna A, Kim TH, Wu T, Fan J. Right hemisphere superiority for executive control of attention. Cortex 2020; 122:263-276. [DOI: 10.1016/j.cortex.2018.12.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 10/01/2018] [Accepted: 12/11/2018] [Indexed: 11/25/2022]
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20
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Wu Y, Dai Y, Jia Y, Yu S, Xu S, Wang W. Carotid artery plaques and unilateral spatial neglect in the elderly. Medicine (Baltimore) 2020; 99:e18998. [PMID: 31977916 PMCID: PMC7004680 DOI: 10.1097/md.0000000000018998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The causes for falls in the elderly are varied, and visual spatial neglect could be 1 contributing factor. Further, the presence of a carotid artery plaque, especially on the right side, might influence the visual spatial attention of the elderly.Our aim was to identify the intrinsic association between carotid plaques and lateralization of spatial attention in the elderly. Further, we sought to understand and potentially prevent the consequences of unilateral spatial neglect such as injury from falls.Participants aged 64 to 93 years were divided into a group with carotid artery plaque(s) of the right side or both sides (BOTH, n = 38; and 9/ 38 were right side only) and a group without right-side carotid artery plaque(s) (LEFT, n = 53). Participants were asked to perform a line bisection task and undergo doppler ultrasonography examinations.Contrary to expectations, compared to LEFT, the mean index and net scores of the line bisection errors in BOTH were significantly less leftward, but the mean diameter of the right-side common carotid artery in BOTH was significantly larger.Our results indicate that the presence of carotid plaque(s) might be linked to increased risk of falls in the elderly. The attenuated spatial neglect in participants with right-side carotid artery plaque(s) might be due to compensatory carotid artery dilatation.
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Affiliation(s)
- Yixiao Wu
- Department of Ultrasound B, Beishan Community Health Service Center
| | - Yue Dai
- Department of Clinical Psychology and Psychiatry/ School of Public Health, Zhejiang University College of Medicine, Hangzhou, China
| | - Yanli Jia
- Department of Clinical Psychology and Psychiatry/ School of Public Health, Zhejiang University College of Medicine, Hangzhou, China
| | - Shuhang Yu
- Department of Clinical Psychology and Psychiatry/ School of Public Health, Zhejiang University College of Medicine, Hangzhou, China
| | - Siyuan Xu
- Department of Clinical Psychology and Psychiatry/ School of Public Health, Zhejiang University College of Medicine, Hangzhou, China
| | - Wei Wang
- Department of Clinical Psychology and Psychiatry/ School of Public Health, Zhejiang University College of Medicine, Hangzhou, China
- Department of Psychology, Norwegian University of Science and Technology, Trondheim, Norway
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21
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Abstract
The precise contribution of brain regions to selective attention is disputed. New research identifies what happens to nodes in the attention network when one of them is inactivated and reveals whether they might have a causal role in directing attention.
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Affiliation(s)
- Masud Husain
- Nuffield Dept of Clinical Neurosciences, Department of Experimental Psychology and Wellcome Trust Centre for Integrative Neuroimaging, University of Oxford, Oxford OX3 9DU, UK.
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22
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Abstract
In this article, we challenge the usefulness of "attention" as a unitary construct and/or neural system. We point out that the concept has too many meanings to justify a single term, and that "attention" is used to refer to both the explanandum (the set of phenomena in need of explanation) and the explanans (the set of processes doing the explaining). To illustrate these points, we focus our discussion on visual selective attention. It is argued that selectivity in processing has emerged through evolution as a design feature of a complex multi-channel sensorimotor system, which generates selective phenomena of "attention" as one of many by-products. Instead of the traditional analytic approach to attention, we suggest a synthetic approach that starts with well-understood mechanisms that do not need to be dedicated to attention, and yet account for the selectivity phenomena under investigation. We conclude that what would serve scientific progress best would be to drop the term "attention" as a label for a specific functional or neural system and instead focus on behaviorally relevant selection processes and the many systems that implement them.
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Affiliation(s)
- Bernhard Hommel
- Institute of Psychology, Cognitive Psychology Unit and Leiden Institute for Brain and Cognition, Leiden University, Leiden, the Netherlands
| | - Craig S Chapman
- Faculty of Kinesiology, Sport, and Recreation, University of Alberta, Edmonton, Alberta, Canada
| | - Paul Cisek
- Department of Neuroscience, University of Montreal, Montreal, Quebec, Canada
| | - Heather F Neyedli
- School of Health and Human Performance, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Joo-Hyun Song
- Department of Cognitive, Linguistic and Psychological Sciences, Brown University, Providence, RI, USA
| | - Timothy N Welsh
- Centre for Motor Control, Faculty of Kinesiology and Physical Education, University of Toronto, 55 Harbord Street, Toronto, ON, M5S 2W6, Canada.
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23
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Martín-Arévalo E, Lupiáñez J, Narganes-Pineda C, Marino G, Colás I, Chica AB. The causal role of the left parietal lobe in facilitation and inhibition of return. Cortex 2019; 117:311-322. [PMID: 31185374 DOI: 10.1016/j.cortex.2019.04.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 04/12/2019] [Accepted: 04/30/2019] [Indexed: 11/26/2022]
Abstract
Following non-informative peripheral cues, responses are facilitated at the cued compared to the uncued location at short cue-target intervals. This effect reverses at longer intervals, giving rise to Inhibition of Return (IOR). The integration-segregation hypothesis (Lupiáñez, 2010) suggests that peripheral cues always produce an onset-detection cost regardless the behavioral cueing effect that is measured - either facilitation or IOR. In the present study, we used transcranial magnetic stimulation (TMS) to investigate the causal contribution of this detection cost to performance. We used a cueing paradigm with a target discrimination task that was preceded by a non-informative peripheral cue. The presence-absence of a central intervening event was manipulated. Online TMS to the left superior parietal lobe (compared to an active vertex stimulation) lead to an overall more positive effect (faster responses for cued as compared to uncued trials), by putatively impairing the detection cost contribution to performance. The data revealed a strong association between overall RT and the TMS effect, and also between overall RT and the integrity of the first branch of the left superior longitudinal fascicule. These results have critical implications not only for the open debate about the mechanism/s underlying spatial orienting effects, but also for the growing literature demonstrating that white matter connectivity is crucial for explaining inter-individual behavioral variability.
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Affiliation(s)
- E Martín-Arévalo
- Department of Experimental Psychology, and Mind, Brain, and Behavior Research Center (CIMCYC), University of Granada, Spain.
| | - J Lupiáñez
- Department of Experimental Psychology, and Mind, Brain, and Behavior Research Center (CIMCYC), University of Granada, Spain
| | - C Narganes-Pineda
- Department of Experimental Psychology, and Mind, Brain, and Behavior Research Center (CIMCYC), University of Granada, Spain
| | - G Marino
- Department of Experimental Psychology, and Mind, Brain, and Behavior Research Center (CIMCYC), University of Granada, Spain
| | - I Colás
- Department of Experimental Psychology, and Mind, Brain, and Behavior Research Center (CIMCYC), University of Granada, Spain
| | - Ana B Chica
- Department of Experimental Psychology, and Mind, Brain, and Behavior Research Center (CIMCYC), University of Granada, Spain
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24
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Pierce J, Saj A. A critical review of the role of impaired spatial remapping processes in spatial neglect. Clin Neuropsychol 2018; 33:948-970. [DOI: 10.1080/13854046.2018.1503722] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Jordan Pierce
- Department of Neurosciences, University of Geneva, Geneva, Switzerland
| | - Arnaud Saj
- Department of Neurosciences, University of Geneva, Geneva, Switzerland
- Department of Neurology, University Hospital of Geneva, Geneva, Switzerland
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25
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Common brain networks for distinct deficits in visual neglect. A combined structural and tractography MRI approach. Neuropsychologia 2018; 115:167-178. [DOI: 10.1016/j.neuropsychologia.2017.10.018] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 10/15/2017] [Accepted: 10/16/2017] [Indexed: 11/20/2022]
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26
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Hreha K, Chaudhari A, Kong Y, Prathusha M, Barrett A. Illustrating where spatial perception versus memory-based representation: spatial neglect in a distinguished artist; a case report. Neurocase 2018; 24:151-155. [PMID: 30035662 PMCID: PMC6162150 DOI: 10.1080/13554794.2018.1495741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 06/25/2018] [Indexed: 10/28/2022]
Abstract
Spatial neglect is a disorder of attention, perception, and processing of stimuli in contralesional space. The heterogeneous behaviors involve diverse neuroanatomical mechanisms. Anecdotal evidence suggests that neural circuitry of active spatial perception may differ from that used to encode spatial memory. These differences can escape detection by conventional assessments, thereby leading to missed diagnoses. We present a case, in an artist who demonstrates selective impairment in a contralesional space during active Where spatial perception. His performance is better when asked to draw entirely from memory. This case highlights the variability in neglect, importance for comprehensive testing, and encourages further investigation.
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Affiliation(s)
- Kimberly Hreha
- Inpatient Rehabilitation Department, Kessler Institute for
Rehabilitation, West Orange, NJ, USA
- Kessler Foundation, West Orange, NJ, USA
| | | | - Yekyung Kong
- Inpatient Rehabilitation Department, Kessler Institute for
Rehabilitation, West Orange, NJ, USA
- Rutgers – New Jersey Medical School, Newark, NJ,
USA
| | | | - A.M. Barrett
- Inpatient Rehabilitation Department, Kessler Institute for
Rehabilitation, West Orange, NJ, USA
- Kessler Foundation, West Orange, NJ, USA
- Rutgers – New Jersey Medical School, Newark, NJ,
USA
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27
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Luo YL, Bian JW, Zheng ZJ, Zhao L, Han S, Sun XH, Li JF, Ni GX. Effects of methamphetamine abuse on spatial cognitive function. Sci Rep 2018; 8:5502. [PMID: 29615755 PMCID: PMC5882954 DOI: 10.1038/s41598-018-23828-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 03/20/2018] [Indexed: 02/08/2023] Open
Abstract
Methamphetamine (MA) abuse has been rising rapidly over the past decade, however, its impact in spatial cognitive function remains unknown. To understand its effect on visuospatial ability and spatial orientation ability, 40 MA users and 40 non-MA users conducted the Simple Reaction Task (Task 1), the Spatial Orientation Task (Task 2), and the Mental Rotation Task (Task 3), respectively. There was no significant difference in either accuracy or reaction time (RT) between 2 groups in Task 1. During Task 2, in comparison with non-MA users, MA users performed poorer on RT, but not in accuracy for foot and hand stimuli. In addition, both non-MA and MA users responded much more quickly to upward stimuli than downward stimuli on vertical surface, however, only non-MA users exhibited leftward visual field advantage in horizontal orientation processing. As for Task 3, MA users exhibited poorer performance and more errors than their healthy counterparts. For each group, linear relationship was revealed between RT and orientation angle, whereas MA abuse led to longer intercept for all stimuli involved. Our findings suggested that MA abuse may lead to a general deficit in the visuospatial ability and the spatial orientation ability with more serious impact in the former.
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Affiliation(s)
- Yan-Lin Luo
- Department of Neurobiology, Capital Medical University, Beijing, China
| | - Jing-Wei Bian
- Department of Neurobiology, Capital Medical University, Beijing, China
| | - Zhi-Jun Zheng
- Shanghai Compulsory Isolation Detox Center, Shanghai, China
| | - Li Zhao
- Department of Neurobiology, Capital Medical University, Beijing, China
| | - Song Han
- Department of Neurobiology, Capital Medical University, Beijing, China
| | - Xiao-Hong Sun
- Department of Neurobiology, Capital Medical University, Beijing, China
| | - Jun-Fa Li
- Department of Neurobiology, Capital Medical University, Beijing, China.
| | - Guo-Xin Ni
- Department of Rehabilitation Medicine, First Affiliated Hospital, Fujian Medical University, Fuzhou, China.
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Toba MN, Rabuffetti M, Duret C, Pradat-Diehl P, Gainotti G, Bartolomeo P. Component deficits of visual neglect: “Magnetic” attraction of attention vs. impaired spatial working memory. Neuropsychologia 2018; 109:52-62. [DOI: 10.1016/j.neuropsychologia.2017.11.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 11/07/2017] [Accepted: 11/29/2017] [Indexed: 12/18/2022]
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White matter microstructure of attentional networks predicts attention and consciousness functional interactions. Brain Struct Funct 2017; 223:653-668. [PMID: 28905109 DOI: 10.1007/s00429-017-1511-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 09/06/2017] [Indexed: 10/18/2022]
Abstract
Attention is considered as one of the pre-requisites of conscious perception. Phasic alerting and exogenous orienting improve conscious perception of near-threshold information through segregated brain networks. Using a multimodal neuroimaging approach, combining data from functional MRI (fMRI) and diffusion-weighted imaging (DWI), we investigated the influence of white matter properties of the ventral branch of superior longitudinal fasciculus (SLF III) in functional interactions between attentional systems and conscious perception. Results revealed that (1) reduced integrity of the left hemisphere SLF III was predictive of the neural interactions observed between exogenous orienting and conscious perception, and (2) increased integrity of the left hemisphere SLF III was predictive of the neural interactions observed between phasic alerting and conscious perception. Our results combining fMRI and DWI data demonstrate that structural properties of the white matter organization determine attentional modulations over conscious perception.
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Complexity vs. unity in unilateral spatial neglect. Rev Neurol (Paris) 2017; 173:440-450. [DOI: 10.1016/j.neurol.2017.07.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 07/20/2017] [Accepted: 07/21/2017] [Indexed: 11/16/2022]
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Arbula S, Pacella V, De Pellegrin S, Rossetto M, Denaro L, D'Avella D, Della Puppa A, Vallesi A. Addressing the selective role of distinct prefrontal areas in response suppression: A study with brain tumor patients. Neuropsychologia 2017; 100:120-130. [PMID: 28412512 PMCID: PMC5813715 DOI: 10.1016/j.neuropsychologia.2017.04.018] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 04/11/2017] [Accepted: 04/12/2017] [Indexed: 01/15/2023]
Abstract
The diverging evidence for functional localization of response inhibition within the prefrontal cortex might be justified by the still unclear involvement of other intrinsically related cognitive processes like response selection and sustained attention. In this study, the main aim was to understand whether inhibitory impairments, previously found in patients with both left and right frontal lesions, could be better accounted for by assessing these potentially related cognitive processes. We tested 37 brain tumor patients with left prefrontal, right prefrontal and non-prefrontal lesions and a healthy control group on Go/No-Go and Foreperiod tasks. In both types of tasks inhibitory impairments are likely to cause false alarms, although additionally the former task requires response selection and the latter target detection abilities. Irrespective of the task context, patients with right prefrontal damage showed frequent Go and target omissions, probably due to sustained attention lapses. Left prefrontal patients, on the other hand, showed both Go and target omissions and high false alarm rates to No-Go and warning stimuli, suggesting a decisional rather than an inhibitory impairment. An exploratory whole-brain voxel-based lesion-symptom mapping analysis confirmed the association of left ventrolateral and dorsolateral prefrontal lesions with target discrimination failure, and right ventrolateral and medial prefrontal lesions with target detection failure. Results from this study show how left and right prefrontal areas, which previous research has linked to response inhibition, underlie broader cognitive control processes, particularly involved in response selection and target detection. Based on these findings, we suggest that successful inhibitory control relies on more than one functionally distinct process which, if assessed appropriately, might help us to better understand inhibitory impairments across different pathologies. Inhibitory and other co-occurring processes were investigated in brain tumor patients. Attentional lapses in terms of target misses were observed in right frontal patients. Decisional impairment concerning response selection was found in left frontal patients. These results were confirmed by a voxel-based lesion-symptom mapping analysis. Broader cognitive control deficits can account for errors in inhibitory task contexts.
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Affiliation(s)
- Sandra Arbula
- Department of Neuroscience, University of Padova, Italy.
| | | | | | - Marta Rossetto
- Academic Neurosurgery, Department of Neuroscience, University of Padova Medical School, Italy
| | - Luca Denaro
- Department of Neuroscience, University of Padova, Italy; Academic Neurosurgery, Department of Neuroscience, University of Padova Medical School, Italy
| | - Domenico D'Avella
- Department of Neuroscience, University of Padova, Italy; Academic Neurosurgery, Department of Neuroscience, University of Padova Medical School, Italy
| | | | - Antonino Vallesi
- Department of Neuroscience, University of Padova, Italy; San Camillo Hospital IRCCS, Venice, Italy
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English MCW, Maybery MT, Visser TAW. Reduced Pseudoneglect for Physical Space, but not Mental Representations of Space, for Adults with Autistic Traits. J Autism Dev Disord 2017; 47:1956-1965. [PMID: 28374209 DOI: 10.1007/s10803-017-3113-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Neurotypical individuals display a leftward attentional bias, called pseudoneglect, for physical space (e.g. landmark task) and mental representations of space (e.g. mental number line bisection). However, leftward bias is reduced in autistic individuals viewing faces, and neurotypical individuals with autistic traits viewing 'greyscale' stimuli, suggestive of atypical lateralization of attention in autism. We investigated whether representational pseudoneglect for individuals with autistic traits is similarly atypically lateralized by comparing biases on a greyscales, landmark, and mental number line task. We found that pseudoneglect was intact only on the representational measure, the mental number line task, suggesting that mechanisms for atypical lateralization of attention in individuals with autistic traits are specific artefacts of processing physically visual stimuli.
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Affiliation(s)
- Michael C W English
- School of Psychological Science, University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia.
| | - Murray T Maybery
- School of Psychological Science, University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia
| | - Troy A W Visser
- School of Psychological Science, University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia
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Let thy left brain know what thy right brain doeth: Inter-hemispheric compensation of functional deficits after brain damage. Neuropsychologia 2016; 93:407-412. [DOI: 10.1016/j.neuropsychologia.2016.06.016] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 05/06/2016] [Accepted: 06/12/2016] [Indexed: 12/18/2022]
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Spagna A, Martella D, Fuentes LJ, Marotta A, Casagrande M. Hemispheric modulations of the attentional networks. Brain Cogn 2016; 108:73-80. [DOI: 10.1016/j.bandc.2016.07.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 05/10/2016] [Accepted: 07/05/2016] [Indexed: 01/08/2023]
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Semiology of neglect: An update. Ann Phys Rehabil Med 2016; 60:177-185. [PMID: 27103056 DOI: 10.1016/j.rehab.2016.03.003] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 03/21/2016] [Accepted: 03/21/2016] [Indexed: 11/21/2022]
Abstract
Hemispatial neglect is a common disabling condition following brain damage to the right hemisphere. Generally, it involves behavioral bias directed ipsilaterally to the damaged hemisphere and loss of spatial awareness for the contralesional side. In this syndrome, several clinical subtypes were identified. The objective of this article is to provide a nosological analysis of the recent data from the literature on the different subtypes of neglect (visual, auditory, somatosensory, motor, egocentric, allocentric and representational neglect), associated ipsilesional and contralesional productive manifestations and their anatomical lesion correlates. These different anatomical-clinical subtypes can be associated or dissociated. They reflect the heterogeneity of this unilateral neglect syndrome that cannot be approached or interpreted in a single manner. We propose that these subtypes result from different underlying deficits: exogenous attentional deficit (visual, auditory neglect); representational deficit (personal neglect, representational neglect, hyperschematia); shift of the egocentric reference frame (egocentric neglect); attentional deficit between objects and within objects (allocentric neglect), endogenous attentional deficit (representational neglect) and transsaccadic working memory or spatial remapping deficit (ipsilesional productive manifestations). Taking into account the different facets of the unilateral neglect syndrome should promote the development of more targeted cognitive rehabilitation protocols.
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Ogourtsova T, Archambault P, Lamontagne A. Impact of post-stroke unilateral spatial neglect on goal-directed arm movements: systematic literature review. Top Stroke Rehabil 2016; 22:397-428. [DOI: 10.1179/1074935714z.0000000046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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37
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Chieffi S. Visual illusion and line bisection: a bias hypothesis revisited. Exp Brain Res 2016; 234:1451-8. [PMID: 26781491 DOI: 10.1007/s00221-015-4550-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 12/30/2015] [Indexed: 11/29/2022]
Abstract
It is generally accepted that visual illusions affect line bisection in the predicted direction. However, it has been reported an illusionary bias which seems questioning such general view. In a previous study, participants bisected lines flanked at both ends by two pairs of arrows, pointing in the same direction. The medialmost vertices of one pair converged on the line (converging arrows), whereas those of the other pair did not (non-converging arrows). Participants bisected lines toward the base of the arrows, i.e., toward the wider end of the stimulus and in the direction opposite to that predicted by the Baldwin illusion. However, the bisection bias was also directed away from the location of the converging arrows. We investigated what is the main factor affecting line bisection: arrows orientation, as previously suggested, or interference effects related to the location of converging arrows. In experiment 1, participants bisected lines flanked by converging versus non-converging arrows. Results confirmed the presence of a bisection bias directed not only toward the base of the converging arrows but also away from their location. In experiment 2, the arrows were located more internally, so that their medialmost vertices always converged on the line. Results showed that the bisection bias was directed away from the location of the arrows regardless of their orientation. It is suggested that the previously reported bisection bias did not depend on arrows orientation, but rather on interference effects related to converging arrows position. The theoretical implications of the results are discussed.
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Affiliation(s)
- Sergio Chieffi
- Department of Experimental Medicine, Second University of Naples, Via Costantinopoli 16, 80138, Naples, Italy.
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38
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Mattoo KA, Garg R, Kumar S. Geriatric forensics - Part 2 "Prevalence of elder abuse and their potential forensic markers among medical and dental patients". J Forensic Dent Sci 2015; 7:201-7. [PMID: 26816460 PMCID: PMC4714408 DOI: 10.4103/0975-1475.172436] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
CONTEXT This study is a continuation of the earlier studies and has been extended to investigate the potential forensic markers of elder abuse. AIMS To determine the prevalence of elder abuse in various outpatient departments (OPDs). To study the associated parameters related to the abuser and the abused. To determine the existence of potential forensic markers of elder abuse. SETTINGS AND DESIGN The subjects were randomly selected from the medical and the dental OPDs of the university. MATERIALS AND METHODS Eight hundred and thirty two elderly subjects in the age range 40-60 years were interviewed using a questionnaire to determine the existence of elder abuse. The subjects were investigated and examined for weight, nutrition and hydration, vital signs, habits, existing visual and auditory capabilities, medications, disclosure of wills/deeds, signs of depression, and documented cleanliness. The mini-mental state examination, the Geriatric Depression Scale, the Clock drawing test, and the Brief Psychiatric Rating Scale were used to determine the potential forensic markers. STATISTICAL ANALYSIS USED Mean values in percentage were determined by dividing the number of determined subjects by the total number of subjects for that parameter. RESULTS About 37% in medical and 41% in dental OPDs were found to have suffered from abuse, mostly in the age group 60-70 years. Females received more abuse and a combination of son and daughter-in-law constituted most abusers. Various potential markers of elder abuse and neglect investigated among the elder abuse victims included depression (89%), signs of improper feeding (83%), changes in personal hygiene (69%), need for medical/dental treatment (78%), medication misuse (67%), changes in wills/deeds (26%), decubiti (10%), bruises (17%), skin tears (27%), and confusion (23%). CONCLUSIONS Elder abuse exists in one or more forms in both medical and dental OPDs among both males and females in all age groups.
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Affiliation(s)
- Khurshid A. Mattoo
- Department of Prosthodontics, College of Dentistry, Jazan University, Kingdom of Saudi Arabia
| | - Rishabh Garg
- Department of Prosthodontics, College of Dentistry, Jazan University, Kingdom of Saudi Arabia
| | - Shalabh Kumar
- Department of Prosthodontics, College of Dentistry, Jazan University, Kingdom of Saudi Arabia
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Individuals with Autistic-Like Traits Show Reduced Lateralization on a Greyscales Task. J Autism Dev Disord 2015; 45:3390-5. [DOI: 10.1007/s10803-015-2493-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
The syndrome of visuospatial neglect is a common consequence of unilateral brain injury. It is most often associated with stroke and is more severe and persistent following right hemisphere damage, with reported frequencies in the acute stage of up to 80%. Neglect is primarily a disorder of attention whereby patients characteristically fail to orientate, to report or to respond to stimuli located on the contralesional side. Neglect is usually caused by large strokes in the middle cerebral artery territory and is heterogeneous, such that most patients do not manifest every feature of the syndrome. A number of treatments may improve neglect, but there is no widely accepted universal approach to therapy. Although most patients recover spontaneously, the evidence suggests that they continue to have significant cognitive impairments, particularly relating to attention.
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Affiliation(s)
- Korina Li
- Centre for Restorative Neuroscience, Division of Brain Sciences, Imperial College London, London, UK Department of Neurology, University Hospital Coventry, Coventry, West Midlands, UK
| | - Paresh A Malhotra
- Centre for Restorative Neuroscience, Division of Brain Sciences, Imperial College London, London, UK
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Dombrowe I, Juravle G, Alavash M, Gießing C, Hilgetag CC. The effect of 10 Hz repetitive transcranial magnetic stimulation of posterior parietal cortex on visual attention. PLoS One 2015; 10:e0126802. [PMID: 25970438 PMCID: PMC4430548 DOI: 10.1371/journal.pone.0126802] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 04/08/2015] [Indexed: 11/19/2022] Open
Abstract
Repetitive transcranial magnetic stimulation (rTMS) of the posterior parietal cortex (PPC) at frequencies lower than 5 Hz transiently inhibits the stimulated area. In healthy participants, such a protocol can induce a transient attentional bias to the visual hemifield ipsilateral to the stimulated hemisphere. This bias might be due to a relatively less active stimulated hemisphere and a relatively more active unstimulated hemisphere. In a previous study, Jin and Hilgetag (2008) tried to switch the attention bias from the hemifield ipsilateral to the hemifield contralateral to the stimulated hemisphere by applying high frequency rTMS. High frequency rTMS has been shown to excite, rather than inhibit, the stimulated brain area. However, the bias to the ipsilateral hemifield was still present. The participants’ performance decreased when stimuli were presented in the hemifield contralateral to the stimulation site. In the present study we tested if this unexpected result was related to the fact that participants were passively resting during stimulation rather than performing a task. Using a fully crossed factorial design, we compared the effects of high frequency rTMS applied during a visual detection task and high frequency rTMS during passive rest on the subsequent offline performance in the same detection task. Our results were mixed. After sham stimulation, performance was better after rest than after task. After active 10 Hz rTMS, participants’ performance was overall better after task than after rest. However, this effect did not reach statistical significance. The comparison of performance after rTMS with task and performance after sham stimulation with task showed that 10 Hz stimulation significantly improved performance in the whole visual field. Thus, although we found a trend to better performance after rTMS with task than after rTMS during rest, we could not reject the hypothesis that high frequency rTMS with task and high frequency rTMS during rest equally affect performance.
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Affiliation(s)
- Isabel Dombrowe
- Department of Experimental Psychology, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
- Department of Computational Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- * E-mail:
| | - Georgiana Juravle
- Department of Computational Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Mohsen Alavash
- Biological Psychology Lab, Department of Psychology, European Medical School, University of Oldenburg, Oldenburg, Germany
| | - Carsten Gießing
- Biological Psychology Lab, Department of Psychology, European Medical School, University of Oldenburg, Oldenburg, Germany
| | - Claus C. Hilgetag
- Department of Computational Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of Health Sciences, Boston University, Boston, USA
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42
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Italian standardization of the Apples Cancellation Test. Neurol Sci 2015; 36:1233-40. [PMID: 25618236 DOI: 10.1007/s10072-015-2088-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 01/19/2015] [Indexed: 01/07/2023]
Abstract
Hemispatial neglect due to right parieto-temporo-frontal lesions has a negative impact on the success of rehabilitation, resulting in poor functional gain. Recent research has shown that different types of neglect can impact in a different way on rehabilitation outcomes. The availability of a sensitive test, useful for distinguishing egocentric and allocentric forms of neglect, may be clinically important as all current clinical instruments fail to distinguish between these forms of disturbance, yet they differentially predict outcome. The Apples Test is a new instrument useful to evaluate both egocentric and allocentric forms of neglect. In order to establish Italian norms for this diagnostic instrument the test was administered to a sample of 412 healthy people of both genders (201 M and 211 F), aged from 20 to 80 years enrolled from 14 different rehabilitation centers in Italy. Based on the data, we established pathological performance cut-offs for the accuracy score (total omission errors), the asymmetry score for egocentric neglect (omission error difference), the asymmetry score for allocentric neglect (commission error difference) and execution time. The usefulness of the Apples Test for diagnostic purposes is illustrated by presenting three patients with different forms of neglect (egocentric, allocentric and mixed neglect).
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43
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Once you feel it, you see it: Insula and sensory-motor contribution to visual awareness for fearful bodies in parietal neglect. Cortex 2015; 62:56-72. [PMID: 25465122 DOI: 10.1016/j.cortex.2014.10.009] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 07/23/2014] [Accepted: 10/16/2014] [Indexed: 11/23/2022]
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44
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Tosun S, Vaid J. What Affects Facing Direction in Human Facial Profile Drawing? A Meta-Analytic Inquiry. Perception 2014; 43:1377-92. [DOI: 10.1068/p7805] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Two meta-analyses were conducted to examine two potential sources of spatial orientation biases in human profile drawings by brain-intact individuals. The first examined profile facing direction as function of hand used to draw. The second examined profile facing direction in relation to directional scanning biases related to reading/writing habits. Results of the first meta-analysis, based on 27 study samples with 4171 participants, showed that leftward facing of profiles (from the viewer's perspective) was significantly associated with using the right hand to draw. The reading/writing direction meta-analysis, based on 10 study samples with 1552 participants, suggested a modest relationship between leftward profile facing and primary use of a left-to-right reading/writing direction. These findings suggest that biomechanical and cultural factors jointly influence hand movement preferences and in turn the direction of facing of human profile drawings.
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Affiliation(s)
- Sümeyra Tosun
- Department of Psychology, Süleyman Şah University, Istanbul, Turkey
| | - Jyotsna Vaid
- Department of Psychology, Texas A&M University, College Station, TX 77843-4235, USA
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45
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Anton's Syndrome due to Bilateral Ischemic Occipital Lobe Strokes. Case Rep Neurol Med 2014; 2014:474952. [PMID: 25530893 PMCID: PMC4235183 DOI: 10.1155/2014/474952] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 10/10/2014] [Accepted: 10/11/2014] [Indexed: 11/25/2022] Open
Abstract
We present a case of a patient with Anton's syndrome (i.e., visual anosognosia with confabulations), who developed bilateral occipital lobe infarct. Bilateral occipital brain damage results in blindness, and patients start to confabulate to fill in the missing sensory input. In addition, the patient occasionally becomes agitated and talks to himself, which indicates that, besides Anton's syndrome, he might have had Charles Bonnet syndrome, characterized by both visual loss and hallucinations. Anton syndrome, is not so frequent condition and is most commonly caused by ischemic stroke. In this particular case, the patient had successive bilateral occipital ischemia as a result of massive stenoses of head and neck arteries.
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One's own country and familiar places in the mind's eye: Different topological representations for navigational and non-navigational contents. Neurosci Lett 2014; 579:52-7. [DOI: 10.1016/j.neulet.2014.07.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 06/30/2014] [Accepted: 07/09/2014] [Indexed: 11/21/2022]
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47
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Chieffi S, Iavarone A, Iaccarino L, La Marra M, Messina G, De Luca V, Monda M. Age-related differences in distractor interference on line bisection. Exp Brain Res 2014; 232:3659-64. [PMID: 25092273 DOI: 10.1007/s00221-014-4056-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 07/24/2014] [Indexed: 11/24/2022]
Abstract
Using a bisection paradigm, we investigated age-related differences in susceptibility to distractor interference. Older and younger participants were asked to bisect a horizontal line flanked by a pair of distractors, placed in either left or right hemispace. The results showed that (1) in both groups the distractors interfered with line bisection so that the localization of subjective midpoint was selectively shifted away from their position; (2) the shifting of subjective midpoint was greater in the older than in the younger group when the distractors were placed in the left hemispace. We suggest that the increase of the bisection bias in the older group depends on changes in attentional mechanisms involved in inhibiting irrelevant information.
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Affiliation(s)
- Sergio Chieffi
- Department of Experimental Medicine, Second University of Naples, Naples, Italy,
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48
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Bahrainwala ZS, Hillis AE, Dearborn J, Gottesman RF. Neglect performance in acute stroke is related to severity of white matter hyperintensities. Cerebrovasc Dis 2014; 37:223-30. [PMID: 24642789 DOI: 10.1159/000357661] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 12/02/2013] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Leukoaraiosis and its progression have longitudinally been associated with cognitive decline and dementia. Its role in acute cognitive function and response to acute cerebral ischemia is less well understood. We evaluated whether the presence and extent of leukoaraiosis, or white matter hyperintensities (WMH), had an impact on performance on tests of hemispatial neglect in acute ischemic stroke patients. METHODS A series of 206 acute ischemic right-hemispheric stroke patients at Johns Hopkins Hospital underwent brain MRI and cognitive assessment for hemispatial neglect within 5 days of symptom onset. Error rates on neglect tests were evaluated, as were dichotomized measures of neglect, including 'any', 'severe' or 'worst' neglect, based on Z scores of at least 2 on 1, 2 or 3 tests (respectively) within a neglect battery. Acute infarct volumes were measured on diffusion-weighted imaging (DWI) and fluid-attenuated inversion recovery images were reviewed for WMH, using the Cardiovascular Health Study (CHS) rating scale (ranging from 0 to 9, with 9 being 'most extensive'). Linear regression was used to evaluate 'error rate on neglect test' as the dependent variable, as a measure of neglect severity, with 'WMH category' as the primary independent variable, including adjustment for age, sex, race and infarct volume (on DWI). Logistic regression was used to evaluate a binary definition of neglect (defined as above) relative to the same independent variable and covariates. RESULTS Each 1-point increase in CHS leukoaraiosis category was associated with 1.20-fold increased odds (95% CI: 1.00-1.43) of having any neglect, 1.23-fold increased odds (95% CI: 1.02-1.49) of having severe neglect and 1.33-fold increased odds of having worst neglect (95% CI: 1.01-1.76) after adjusting for infarct volume, age, sex and race. Increasing age and infarct size were also important predictors of neglect severity, with a 2.36% higher error rate (95% CI: 0.75-3.97%) on the line cancellation test associated with each category increase in CHS score; similar results were found for each of the neglect tests. Line cancellation neglect scores were worse in individuals with both severe WMH and large infarcts (p interaction, unadjusted=0.03). CONCLUSIONS More severe leukoaraiosis is associated with more hemispatial neglect after acute ischemic stroke, independent of infarct volume, age and sex. We found not only more frequent neglect but also more severe neglect, based on error rates on neglect tests, in individuals with increasing leukoaraiosis. This emphasizes the importance of preexisting brain microvascular disease in outcomes of stroke patients. Further studies of the possible mechanism behind this association are needed.
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Affiliation(s)
- Zainab S Bahrainwala
- School of Public Health, University of Medicine and Dentistry of New Jersey, Piscataway, N.J., USA
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Chieffi S, Iachini T, Iavarone A, Messina G, Viggiano A, Monda M. Flanker interference effects in a line bisection task. Exp Brain Res 2014; 232:1327-34. [PMID: 24496492 DOI: 10.1007/s00221-014-3851-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 01/18/2014] [Indexed: 10/25/2022]
Abstract
Previous studies have shown that flanking distractors influence line bisection. In the present study, we examined if reaching the flanker after bisecting the line resulted in a variation of flanker interference on line bisection. Right- and left-handed participants were asked to bisect a horizontal line flanked by a dot (bisection task, B-task) or to bisect the line and then to reach the dot (bisection plus reaching task, BR-task). The dot was placed laterally to, and above or below, the line edge. The results showed that in both tasks the subjective midpoint was shifted away from the position of the dot. However, this effect was greater in the BR-task than in the B-task. We suggest that the requirement to perform an action to the flanker in the BR-task induced participants to pay more attention to the dot, enhancing its salience and distorting effects on line bisection.
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Affiliation(s)
- Sergio Chieffi
- Department of Experimental Medicine, Second University of Naples, Naples, Italy,
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Brem AK, Fried PJ, Horvath JC, Robertson EM, Pascual-Leone A. Is neuroenhancement by noninvasive brain stimulation a net zero-sum proposition? Neuroimage 2014; 85 Pt 3:1058-68. [PMID: 23880500 PMCID: PMC4392930 DOI: 10.1016/j.neuroimage.2013.07.038] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Revised: 07/09/2013] [Accepted: 07/13/2013] [Indexed: 10/26/2022] Open
Abstract
In the past several years, the number of studies investigating enhancement of cognitive functions through noninvasive brain stimulation (NBS) has increased considerably. NBS techniques, such as transcranial magnetic stimulation and transcranial current stimulation, seem capable of enhancing cognitive functions in patients and in healthy humans, particularly when combined with other interventions, including pharmacologic, behavioral and cognitive therapies. The "net zero-sum model", based on the assumption that brain resources are subjected to the physical principle of conservation of energy, is one of the theoretical frameworks proposed to account for such enhancement of function and its potential cost. We argue that to guide future neuroenhancement studies, the net-zero sum concept is helpful, but only if its limits are tightly defined.
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Affiliation(s)
- Anna-Katharine Brem
- Berenson-Allen Center for Noninvasive Brain Stimulation, Division of Cognitive Neurology, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Peter J. Fried
- Berenson-Allen Center for Noninvasive Brain Stimulation, Division of Cognitive Neurology, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
- Laboratory of Cerebral Dynamics, Plasticity and Rehabilitation, Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, MA, USA
| | - Jared C. Horvath
- Psychological Sciences, University of Melbourne, Melbourne, Australia
| | - Edwin M. Robertson
- Berenson-Allen Center for Noninvasive Brain Stimulation, Division of Cognitive Neurology, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Alvaro Pascual-Leone
- Berenson-Allen Center for Noninvasive Brain Stimulation, Division of Cognitive Neurology, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
- Institut Guttman de Neurorehabilitació, Universitat Autonoma, Barcelona, Spain
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