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Ten Brink AF, van Heijst M, Portengen BL, Naber M, Strauch C. Uncovering the (un)attended: Pupil light responses index persistent biases of spatial attention in neglect. Cortex 2023; 167:101-114. [PMID: 37542802 DOI: 10.1016/j.cortex.2023.06.008] [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: 03/30/2023] [Revised: 05/31/2023] [Accepted: 06/26/2023] [Indexed: 08/07/2023]
Abstract
Visuospatial neglect is a frequent and disabling disorder, mostly after stroke, that presents in impaired awareness to stimuli on one side of space. Neglect causes disability and functional dependence, even long after the injury. Improving measurements of the core attentional deficit might hold the key for better understanding of the condition and development of treatment. We present a rapid, pupillometry-based method that assesses automatic biases in (covert) attention, without requiring behavioral responses. We exploit the phenomenon that pupil light responses scale with the degree of covert attention to stimuli, and thereby reveal what draws (no) attention. Participants with left-sided neglect after right-sided lesions following stroke (n = 5), participants with hemianopia/quadrantanopia following stroke (n = 11), and controls (n = 22) were presented with two vertical bars, one of which was white and one of which was black, while fixating the center. We varied which brightness was left and right, respectively across trials. In line with the hypotheses, participants with neglect demonstrated biased pupil light responses to the brightness on the right side. Participants with hemianopia showed similar biases to intact parts of the visual field, whilst controls exhibited no bias. Together, this demonstrates that the pupil light response can reveal not only visual, but also attentional deficits. Strikingly, our pupillometry-based bias estimates were not in agreement with neuropsychological paper-and-pencil assessments conducted on the same day, but were with those administered in an earlier phase post-stroke. Potentially, we pick up on persistent biases in the covert attentional system that participants increasingly compensate for in classical neuropsychological tasks and everyday life. The here proposed method may not only find clinical application, but also advance theory and aid the development of successful restoration therapies by introducing a precise, longitudinally valid, and objective measurement that might not be affected by compensation.
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Affiliation(s)
- Antonia F Ten Brink
- Utrecht University, Experimental Psychology, Helmholtz Institute, Utrecht, the Netherlands
| | - Marlies van Heijst
- Utrecht University, Experimental Psychology, Helmholtz Institute, Utrecht, the Netherlands
| | - Brendan L Portengen
- Utrecht University, Experimental Psychology, Helmholtz Institute, Utrecht, the Netherlands; University Medical Center Utrecht, Ophthalmology, Utrecht, the Netherlands
| | - Marnix Naber
- Utrecht University, Experimental Psychology, Helmholtz Institute, Utrecht, the Netherlands
| | - Christoph Strauch
- Utrecht University, Experimental Psychology, Helmholtz Institute, Utrecht, the Netherlands.
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Salatino A, Zavattaro C, Gammeri R, Cirillo E, Piatti ML, Pyasik M, Serra H, Pia L, Geminiani G, Ricci R. Virtual reality rehabilitation for unilateral spatial neglect: A systematic review of immersive, semi-immersive and non-immersive techniques. Neurosci Biobehav Rev 2023; 152:105248. [PMID: 37247829 DOI: 10.1016/j.neubiorev.2023.105248] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 05/24/2023] [Accepted: 05/26/2023] [Indexed: 05/31/2023]
Abstract
INTRODUCTION In recent decades, new virtual reality (VR)-based protocols have been proposed for the rehabilitation of Unilateral Spatial Neglect (USN), a debilitating disorder of spatial awareness. However, it remains unclear which type of VR protocol and level of VR immersion can maximize the clinical benefits. To answer these questions, we conducted a systematic review of the use of VR for the rehabilitation of USN. METHOD Studies between 2000 and 2022 that met the inclusion criteria were classified according to their research design and degree of immersion (non-immersive, NIVR; semi-immersive, SIVR; immersive, IVR). RESULTS A total of 375 studies were identified, of which 26 met the inclusion criteria. Improvements were found in 84.6% of the reviewed studies: 85.7% used NIVR, 100% used SIVR and 55.6% used IVR. However, only 42.3% of them included a control group and only 19.2% were randomized control trials (RCT). CONCLUSION VR protocols may offer new opportunities for USN rehabilitation, although further RCTs are needed to validate their clinical efficacy.
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Affiliation(s)
- Adriana Salatino
- Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy; SAN Lab (Space Attention and Action), Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy; Department of Life Sciences, Royal Military Academy, Hobbema 8, 1000 Brussels, Belgium
| | - Claudio Zavattaro
- Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy; SAN Lab (Space Attention and Action), Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy
| | - Roberto Gammeri
- Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy; SAN Lab (Space Attention and Action), Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy
| | - Emanuele Cirillo
- Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy; SAN Lab (Space Attention and Action), Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy
| | - Maria Luisa Piatti
- Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy
| | - Maria Pyasik
- Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy; SAMBA (SpAtial, Motor and Bodily Awareness) Research Group, Department of Psychology, University of Turin, Via Verdi, 10, 10124 Turin, Italy
| | - Hilary Serra
- Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy; SAN Lab (Space Attention and Action), Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy
| | - Lorenzo Pia
- Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy; SAMBA (SpAtial, Motor and Bodily Awareness) Research Group, Department of Psychology, University of Turin, Via Verdi, 10, 10124 Turin, Italy; NIT - Neuroscience Institute of Turin, Via Verdi, 8, 10124 Turin, Italy
| | - Giuliano Geminiani
- Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy; NIT - Neuroscience Institute of Turin, Via Verdi, 8, 10124 Turin, Italy
| | - Raffaella Ricci
- Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy; SAN Lab (Space Attention and Action), Department of Psychology, University of Turin, Via Verdi 10, 10124 Turin, Italy; NIT - Neuroscience Institute of Turin, Via Verdi, 8, 10124 Turin, Italy.
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Lafitte R, Jeager M, Piscicelli C, Dai S, Lemaire C, Chrispin A, Davoine P, Dupierrix E, Pérennou D. Spatial neglect encompasses impaired verticality representation after right hemisphere stroke. Ann N Y Acad Sci 2023; 1520:140-152. [PMID: 36478572 DOI: 10.1111/nyas.14938] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Spatial neglect after right hemisphere stroke (RHS) was recently found to encompass lateropulsion, a deficit in body orientation with respect to gravity caused by altered brain processing of graviception. By analogy, we hypothesized that spatial neglect after RHS might encompass an altered representation of verticality. We also assumed a strong relation between body neglect and impaired postural vertical, both referring to the body. To tackle these issues, we performed contingency and correlation analyses between two domains of spatial neglect (body, extra-body) and two modalities of verticality perception (postural, visual) in 77 individuals (median age = 67) with a first-ever subacute RHS (1-3 months). All individuals with a transmodal (postural and visual) tilt in verticality perception (n = 26) had spatial neglect, but the reverse was not found. Correlation and multivariate analyses revealed that spatial neglect (and notably body neglect) was associated more with postural than visual vertical tilts. These findings indicate that after RHS, an impaired verticality representation results from a kind of graviceptive neglect, bearing first on somaesthetic graviception and second on vestibular graviception. They also suggest that the human brain uses not only a mosaic of 2D representations but also 3D maps involving a transmodal representation of verticality.
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Affiliation(s)
- Rémi Lafitte
- Department of Neurorehabilitation, Univ. Grenoble Alpes, UMR CNRS 5105 Neuropsychology and Neurocognition, CHU Grenoble Alpes, South Hospital, Grenoble, France
| | - Marie Jeager
- Department of Neurorehabilitation, Univ. Grenoble Alpes, UMR CNRS 5105 Neuropsychology and Neurocognition, CHU Grenoble Alpes, South Hospital, Grenoble, France
| | - Céline Piscicelli
- Department of Neurorehabilitation, Univ. Grenoble Alpes, UMR CNRS 5105 Neuropsychology and Neurocognition, CHU Grenoble Alpes, South Hospital, Grenoble, France
| | - Shenhao Dai
- Department of Neurorehabilitation, Univ. Grenoble Alpes, UMR CNRS 5105 Neuropsychology and Neurocognition, CHU Grenoble Alpes, South Hospital, Grenoble, France
| | - Camille Lemaire
- Department of Neurorehabilitation, Univ. Grenoble Alpes, UMR CNRS 5105 Neuropsychology and Neurocognition, CHU Grenoble Alpes, South Hospital, Grenoble, France
| | - Anne Chrispin
- Department of Neurorehabilitation, Univ. Grenoble Alpes, UMR CNRS 5105 Neuropsychology and Neurocognition, CHU Grenoble Alpes, South Hospital, Grenoble, France
| | - Patrice Davoine
- Department of Neurorehabilitation, Univ. Grenoble Alpes, UMR CNRS 5105 Neuropsychology and Neurocognition, CHU Grenoble Alpes, South Hospital, Grenoble, France
| | - Eve Dupierrix
- Department of Neurorehabilitation, Univ. Grenoble Alpes, UMR CNRS 5105 Neuropsychology and Neurocognition, CHU Grenoble Alpes, South Hospital, Grenoble, France
| | - Dominic Pérennou
- Department of Neurorehabilitation, Univ. Grenoble Alpes, UMR CNRS 5105 Neuropsychology and Neurocognition, CHU Grenoble Alpes, South Hospital, Grenoble, France
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List A. Global and local priming in a multi-modal context. Front Hum Neurosci 2022; 16:1043475. [PMID: 36926378 PMCID: PMC10011069 DOI: 10.3389/fnhum.2022.1043475] [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: 09/13/2022] [Accepted: 12/14/2022] [Indexed: 03/04/2023] Open
Abstract
Perceptual information can be processed at many different scales, from featural details to entire scenes. Attentional selection of different scales has been studied using hierarchical stimuli, with research elucidating a variety of biases in local and global attentional selection (due to, e.g., stimulus properties, brain injury, and experience). In this study, the emphasis is on biases produced through recent experience, or level-specific priming effects, which have been demonstrated within both the visual and auditory modalities. Namely, when individuals attend to local information, they are subsequently biased to attend locally (and similarly so with global attention). Here, these level-specific priming effects are investigated in a multi-modal context to determine whether cross-modal interactions occur between visual and auditory modalities during hierarchical processing. Specifically, the study addresses if attentional selection of local or global information in the visual modality subsequently biases auditory attentional selection to that level, and vice versa (i.e., level-priming). Though expected identity priming effects emerged in the study, no cross-modal level-priming effects manifested. Furthermore, the multi-modal context eliminated the well-established within-modality level-specific priming effects. Thus, though the study does reveal a multi-modal effect, it was not a level-based effect. Instead, paradoxically, the multi-modal context eliminated attentional scope biases (i.e., level-priming) within uni-modal transitions. In other words, when visual and auditory information are equally likely require attention, no persistence emerges for processing local or global information over time, even within a single modality.
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Affiliation(s)
- Alexandra List
- Department of Psychology and Neuroscience Program, Hamilton College, Clinton, NY, United States
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Pierce JE, Ronchi R, Thomasson M, Rossi I, Casati C, Saj A, Vallar G, Vuilleumier P. A novel computerized assessment of manual spatial exploration in unilateral spatial neglect. Neuropsychol Rehabil 2021; 32:1099-1120. [PMID: 33478363 DOI: 10.1080/09602011.2021.1875850] [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] [Indexed: 12/11/2022]
Abstract
Unilateral spatial neglect is a neuropsychological syndrome commonly observed after stroke and defined by the inability to attend or respond to contralesional stimuli. Typically, symptoms are assessed using clinical tests that rely upon visual/perceptual abilities. However, neglect may affect high-level representations controlling attention in other modalities as well. Here we developed a novel manual exploration test using a touch screen computer to quantify spatial search behaviour without visual input. Twelve chronic stroke patients with left neglect and 27 patients without neglect (based on clinical tests) completed our task. Four of the 12 "neglect" patients exhibited clear signs of neglect on our task as compared to "non-neglect" patients and healthy controls, and six other patients (from both groups) also demonstrated signs of neglect compared to healthy controls only. While some patients made asymmetrical responses on only one task, generally, patients with the strongest neglect performed poorly on multiple tasks. This suggests that representations associated with different modalities may be affected separately, but that severe forms of neglect are more likely related to damage in a common underlying representation. Our manual exploration task is easy to administer and can be added to standard neglect screenings to better measure symptom severity.
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Affiliation(s)
- Jordan E Pierce
- Laboratory for Behavioral Neurology and Imaging of Cognition, Department of Neuroscience, University of Geneva, Switzerland
| | - Roberta Ronchi
- Laboratory for Behavioral Neurology and Imaging of Cognition, Department of Neuroscience, University of Geneva, Switzerland.,Department of Clinical Neurosciences, University Hospital of Geneva, Switzerland
| | - Marine Thomasson
- Department of Clinical Neurosciences, University Hospital of Geneva, Switzerland.,Clinical and Experimental Neuropsychology Laboratory, Department of Psychology and Educational Sciences, University of Geneva, Switzerland
| | - Irene Rossi
- Neuropsychological Laboratory, IRCCS Istituto Auxologico Italiano, Milano, Italy.,Dept. of Neurorehabilitation Sciences, IRCCS Istituto Auxologico Italiano, Milano, Italy
| | - Carlotta Casati
- Neuropsychological Laboratory, IRCCS Istituto Auxologico Italiano, Milano, Italy.,Dept. of Neurorehabilitation Sciences, IRCCS Istituto Auxologico Italiano, Milano, Italy
| | - Arnaud Saj
- Department of Psychology, University of Montreal, Canada
| | - Giuseppe Vallar
- Neuropsychological Laboratory, IRCCS Istituto Auxologico Italiano, Milano, Italy.,Department of Psychology, University of Milano-Bicocca, Milano, Italy
| | - Patrik Vuilleumier
- Laboratory for Behavioral Neurology and Imaging of Cognition, Department of Neuroscience, University of Geneva, Switzerland
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De Paepe AL, Legrain V, Van der Biest L, Hollevoet N, Van Tongel A, De Wilde L, Jacobs H, Crombez G. An investigation of perceptual biases in complex regional pain syndrome. PeerJ 2020; 8:e8819. [PMID: 32274265 PMCID: PMC7130113 DOI: 10.7717/peerj.8819] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 02/28/2020] [Indexed: 01/31/2023] Open
Abstract
Patients with complex regional pain syndrome (CRPS) report cognitive difficulties, affecting the ability to represent, perceive and use their affected limb. Moseley, Gallace & Spence (2009) observed that CRPS patients tend to bias the perception of tactile stimulation away from the pathological limb. Interestingly, this bias was reversed when CRPS patients were asked to cross their arms, implying that this bias is embedded in a complex representation of the body that takes into account the position of body-parts. Other studies have failed to replicate this finding (Filbrich et al., 2017) or have even found a bias in the opposite direction (Sumitani et al., 2007). Moreover, perceptual biases in CRPS patients have not often been compared to these of other chronic pain patients. Chronic pain patients are often characterized by an excessive focus of attention for bodily sensations. We might therefore expect that non-CRPS pain patients would show a bias towards instead of away from their affected limb. The aim of this study was to replicate the study of Moseley, Gallace & Spence (2009) and to extend it by comparing perceptual biases in a CRPS group with two non-CRPS pain control groups (i.e., chronic unilateral wrist and shoulder pain patients). In a temporal order judgment (TOJ) task, participants reported which of two tactile stimuli, one applied to either hand at various intervals, was perceived as occurring first. TOJs were made, either with the arms in a normal (uncrossed) position, or with the arms crossed over the body midline. We found no consistent perceptual biases in either of the patient groups and in either of the conditions (crossed/uncrossed). Individual differences were large and might, at least partly, be explained by other variables, such as pain duration and temperature differences between the pathological and non-pathological hand. Additional studies need to take these variables into account by, for example, comparing biases in CRPS (and non-CRPS) patients in an acute versus a chronic pain state.
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Affiliation(s)
- Annick L. De Paepe
- Department of Experimental-Clinical and Health Psychology, Faculty of Psychology and Educational Sciences, Ghent University, Ghent, Belgium
| | - Valéry Legrain
- Institute of Neuroscience, Université Catholique de Louvain, Brussels, Belgium
| | - Lien Van der Biest
- Department of Experimental-Clinical and Health Psychology, Faculty of Psychology and Educational Sciences, Ghent University, Ghent, Belgium
| | - Nadine Hollevoet
- Department of Orthopaedic Surgery and Traumatology, Ghent University Hospital, Ghent, Belgium
| | - Alexander Van Tongel
- Department of Orthopaedic Surgery and Traumatology, Ghent University Hospital, Ghent, Belgium
| | - Lieven De Wilde
- Department of Orthopaedic Surgery and Traumatology, Ghent University Hospital, Ghent, Belgium
| | - Herlinde Jacobs
- Unit of Physical Medicine, AZ Maria Middelares Hospital, Ghent, Belgium
| | - Geert Crombez
- Department of Experimental-Clinical and Health Psychology, Faculty of Psychology and Educational Sciences, Ghent University, Ghent, Belgium
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Gammeri R, Iacono C, Ricci R, Salatino A. Unilateral Spatial Neglect After Stroke: Current Insights. Neuropsychiatr Dis Treat 2020; 16:131-152. [PMID: 32021206 PMCID: PMC6959493 DOI: 10.2147/ndt.s171461] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 12/24/2019] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION Unilateral spatial neglect (USN) is a disorder of contralesional space awareness which often follows unilateral brain lesion. Since USN impairs awareness of contralesional space/body and often of concomitant motor disorders, its presence represents a negative prognostic factor of functional recovery. Thus, the disorder needs to be carefully diagnosed and treated. Here, we attempted to present a clear and concise picture of current insights in the comprehension and rehabilitation of USN. METHODS We first provided an updated overview of USN clinical and neuroanatomical features and then highlighted recent progresses in the diagnosis and rehabilitation of the disease. In relation to USN rehabilitation, we conducted a MEDLINE literature research on three of the most promising interventions for USN rehabilitation: prismatic adaptation (PA), non-invasive brain stimulation (NIBS), and virtual reality (VR). The identified studies were classified according to the strength of their methods. RESULTS The last years have witnessed a relative decrement of interest in the study of neuropsychological disorders of spatial awareness in USN, but a relative increase in the study of potential interventions for its rehabilitation. Although optimal protocols still need to be defined, high-quality studies have demonstrated the efficacy of PA, TMS and tDCS interventions for the treatment of USN. In addition, preliminary investigations are suggesting the potentials of GVS and VR approaches for USN rehabilitation. CONCLUSION Advancing neuropsychological and neuroscience tools to investigate USN pathophysiology is a necessary step to identify effective rehabilitation treatments and to foster our understanding of neurofunctional bases of spatial cognition in the healthy brain.
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Affiliation(s)
- Roberto Gammeri
- Department of Psychology, SAMBA (SpAtial, Motor and Bodily Awareness) Research Group, University of Turin, Turin, Italy
| | - Claudio Iacono
- Department of Psychology, SAMBA (SpAtial, Motor and Bodily Awareness) Research Group, University of Turin, Turin, Italy
| | - Raffaella Ricci
- Department of Psychology, SAMBA (SpAtial, Motor and Bodily Awareness) Research Group, University of Turin, Turin, Italy
- Neuroscience Institute of Turin (NIT), University of Turin, Turin, Italy
| | - Adriana Salatino
- Department of Psychology, SAMBA (SpAtial, Motor and Bodily Awareness) Research Group, University of Turin, Turin, Italy
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Revol P, Touil N, Havé L, Rode G, Jacquin-Courtois S, Rossetti Y. Prisms adaptation improves haptic object discrimination in hemispatial neglect. Cortex 2019; 123:152-161. [PMID: 31790943 DOI: 10.1016/j.cortex.2019.10.004] [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: 07/06/2018] [Revised: 01/25/2019] [Accepted: 10/14/2019] [Indexed: 10/25/2022]
Abstract
Neglect manifestations are typically explored in the visual modality. Although they are less commonly investigated tactile deficits also exist, and the aim of this study was to explore neglect in this modality. A haptic object discrimination task was designed to assess whether or not shape perception is impaired in seven right brain damaged patients with or without neglect. Each patient's performance on the object discrimination task was assessed before and after a brief period of prism adaptation, a bottom-up rehabilitation technique known to improve neglect symptoms. The results suggest that a haptic deficit - in the form of substantially more left errors - is present only in patients with neglect. Following prism adaptation, the left bias error rates in neglect patients were substantially reduced, and were similar to those observed in patients without neglect. Moreover, the haptic processing of the right side of objects also improved slightly. This finding suggests an expansion of the effects of prism adaptation to the unexposed, tactile modality supporting the cross-modal central effect hypothesis.
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Affiliation(s)
- Patrice Revol
- Plate-forme 'Mouvement et Handicap', Hôpital Henry-Gabrielle, Hospices Civils de Lyon, Saint-Genis-Laval, France; Inserm UMR-S 1028, CNRS UMR 5292, ImpAct, Centre de Recherche en Neurosciences de Lyon, Université Lyon-1, Bron, France.
| | - Nathalie Touil
- Inserm UMR-S 1028, CNRS UMR 5292, ImpAct, Centre de Recherche en Neurosciences de Lyon, Université Lyon-1, Bron, France
| | | | - Gilles Rode
- Inserm UMR-S 1028, CNRS UMR 5292, ImpAct, Centre de Recherche en Neurosciences de Lyon, Université Lyon-1, Bron, France
| | - Sophie Jacquin-Courtois
- Service de Rééducation Neurologique, Hôpital Henry Gabrielle, Hospices Civils de Lyon et Université Claude Bernard, Lyon, France
| | - Yves Rossetti
- Plate-forme 'Mouvement et Handicap', Hôpital Henry-Gabrielle, Hospices Civils de Lyon, Saint-Genis-Laval, France; Inserm UMR-S 1028, CNRS UMR 5292, ImpAct, Centre de Recherche en Neurosciences de Lyon, Université Lyon-1, Bron, France
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Paschke K, Bähr M, Wüstenberg T, Wilke M. Trunk rotation and handedness modulate cortical activation in neglect-associated regions during temporal order judgments. NEUROIMAGE-CLINICAL 2019; 23:101898. [PMID: 31491819 PMCID: PMC6627032 DOI: 10.1016/j.nicl.2019.101898] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 05/13/2019] [Accepted: 06/13/2019] [Indexed: 12/02/2022]
Abstract
The rotation of the trunk around its vertical midline could be shown to bias visuospatial temporal judgments towards targets in the hemifield ipsilateral to the trunk orientation and to improve visuospatial performance in patients with visual neglect. However, the underlying brain mechanisms are not well understood. Therefore, the goal of the present study was to investigate the neural effects associated with egocentric midplane shifts under consideration of individual handedness. We employed a visuospatial temporal order judgment (TOJ) task in healthy right- and left-handed subjects while their trunk rotation was varied. Participants responded by a saccade towards the stimulus perceived first out of two stimuli presented with different stimulus onset asynchronies (SOA). Apart from gaze behavior, BOLD-fMRI responses were measured using functional magnetic resonance imaging (fMRI). Based on findings from spatial neglect research, analyses of fMRI-BOLD responses were focused on a bilateral fronto-temporo-parietal network comprising Brodmann areas 22, 39, 40, and 44, as well as the basal ganglia core nuclei (caudate, putamen, pallidum). We observed an acceleration of saccadic speed towards stimuli ipsilateral to the trunk orientation modulated by individual handedness. Left-handed participants showed the strongest behavioral and neural effects, suggesting greater susceptibility to manipulations of trunk orientation. With respect to the dominant hand, a rotation around the vertical trunk midline modulated the activation of an ipsilateral network comprising fronto-temporo-parietal regions and the putamen with the strongest effects for saccades towards the hemifield opposite to the dominant hand. Within the investigated network, the temporo-parietal junction (TPJ) appears to serve as a region integrating sensory, motor, and trunk position information. Our results are discussed in the context of gain modulatory and laterality effects. We examined the effect of trunk rotation on brain responses in neglect-associated areas.Trunk-related BOLD-fMRI activation patterns depend on handedness. They were modulated most during trunk rotation contralateral to the dominant hand. Trunk rotation and saccade direction show interaction effects at TPJ. TPJ serves as a region integrating sensory, motor, and trunk position information.
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Affiliation(s)
- Kerstin Paschke
- Department of Cognitive Neurology, University Medicine Göttingen, Robert-Koch-Str. 40, Göttingen 37075, Germany; German Center for Addiction Research in Childhood and Adolescence, University Medical Center Hamburg-Eppendorf, Martinistr. 52, Hamburg 20246, Germany; Department of Neurology, University Medicine Göttingen, Robert-Koch-Str. 40, Goettingen 37075, Germany.
| | - Mathias Bähr
- Department of Neurology, University Medicine Göttingen, Robert-Koch-Str. 40, Goettingen 37075, Germany; DFG Center for Nanoscale Microscopy & Molecular Physiology of the Brain (CNMPB), Germany
| | - Torsten Wüstenberg
- Department of Psychiatry and Psychotherapy, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Berlin Institute of Health, Humboldt-Universität zu Berlin, Charité Campus Mitte, Charitéplatz 1, Berlin 10117, Germany; Systems Neuroscience in Psychiatry (SNiP), Central Institute of Mental Health, Mannheim, J5, Mannheim 68159, Germany
| | - Melanie Wilke
- Department of Cognitive Neurology, University Medicine Göttingen, Robert-Koch-Str. 40, Göttingen 37075, Germany; DFG Center for Nanoscale Microscopy & Molecular Physiology of the Brain (CNMPB), Germany; German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, Göttingen 37077, Germany; Leibniz-science campus primate cognition, Germany
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Facchin A, Sartori E, Luisetti C, De Galeazzi A, Beschin N. Effect of prism adaptation on neglect hemianesthesia. Cortex 2019; 113:298-311. [PMID: 30716611 DOI: 10.1016/j.cortex.2018.12.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 09/07/2018] [Accepted: 12/21/2018] [Indexed: 11/20/2022]
Abstract
Prism adaptation (PA) has proven to be effective in alleviating many signs of unilateral spatial neglect (USN). Generally, the principal improvement after PA treatment was found to be in the high-level cognitive function. Nevertheless, some evidence has also been found for it in somatosensory function. We have aimed to test the influence of PA on neglect hemianesthesia, a condition in which the high-level neglect-related deficit mimics hemianesthesia. Twenty-one USN patients were enrolled in the study. Each patient performed two sessions of PA, one with neutral glasses and one with prism glasses using a cross-over design. Sensitivity on the upper limb was tested using two methods. The first task was the sensibility subtest which was derived from the standard clinical examination. The second was the perceptual and motor electro-cutaneous threshold on the forearms using an electro-cutaneous stimulator. Four neuropsychological tests were used to diagnose USN and to check improvement: Star cancellation, Line bisection, Sentence reading and the Comb & Razor test. Comparing prism with sham conditions, our results show significant improvements in double extinction and in the electro-cutaneous perceptual threshold only for the contralesional hand. No improvement was found for the ipsilesional hand, for the motor threshold, and for neutral glasses. Significant improvement was found in personal neglect. Replication of the task in a subgroup of patients confirmed the primary results. The improvements in somatosensory perception together with the amelioration of personal neglect suggest that PA also has a specific effect on the neglect hemianesthesia.
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Affiliation(s)
- Alessio Facchin
- Department of Psychology, University of Milano-Bicocca, Milano, Italy; Milan Centre for Neuroscience, Milano, Italy; Centre for Research in Optics and Optometry, University of Milano-Bicocca (COMIB), Milano, Italy; Institute of Research and Studies in Optics and Optometry, Vinci, Italy.
| | - Elena Sartori
- Rehabilitation Department, A.S.S.T. Valle Olona, Varese, Italy
| | - Chiara Luisetti
- Rehabilitation Department, A.S.S.T. Valle Olona, Varese, Italy
| | | | - Nicoletta Beschin
- Neuropsychological Service, Rehabilitation Department, A.S.S.T. Valle Olona, Varese, Italy
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11
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Martin K, Trauner DA. Auditory neglect in children following perinatal stroke. Behav Brain Res 2018; 359:878-885. [PMID: 29953906 DOI: 10.1016/j.bbr.2018.06.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 06/22/2018] [Accepted: 06/23/2018] [Indexed: 11/17/2022]
Abstract
Auditory neglect has been found in adults with right hemisphere focal brain lesions following strokes. Visual and tactile neglect has been found in children following both left and right hemisphere lesions resulting from perinatal strokes. The present cross-sectional study assessed auditory neglect in children with early unilateral brain damage from perinatal stroke. Twenty-six children with perinatal stroke and matched controls participated. All were asked to identify the location of a pure tone presented in left or right auditory fields. We found that children who had experienced left hemisphere perinatal strokes were significantly better at localizing sounds on the left side of space than the right side of space, and that response times improved with age on a normal trajectory relative to controls in left hemispace, while they did not improve normally in right hemispace. Children with right hemisphere perinatal strokes were significantly worse at localizing sounds on the right side of space relative to typically developing controls, and did not follow control trajectories for improvement in response times on the left or the right sides of space. Our preliminary results suggest that left hemisphere perinatal strokes may result in contralateral auditory neglect, while right hemisphere perinatal strokes may result in bilateral auditory neglect. Neglect was more severe in children with parietal lobe involvement, suggesting that the parietal lobe may play a dominant role in auditory attention in the developing brain.
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Affiliation(s)
- Kirsten Martin
- Department of Neurosciences, University of California, San Diego School of Medicine, La Jolla, CA, 92093-0935, USA
| | - Doris A Trauner
- Department of Neurosciences, University of California, San Diego School of Medicine, La Jolla, CA, 92093-0935, USA; Department of Pediatrics, University of California, San Diego School of Medicine, La Jolla, CA, 92093-0935, USA.
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12
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Ten Brink AF, Biesbroek JM, Oort Q, Visser-Meily JMA, Nijboer TCW. Peripersonal and extrapersonal visuospatial neglect in different frames of reference: A brain lesion-symptom mapping study. Behav Brain Res 2018; 356:504-515. [PMID: 29940260 DOI: 10.1016/j.bbr.2018.06.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 05/28/2018] [Accepted: 06/11/2018] [Indexed: 10/28/2022]
Abstract
INTRODUCTION Visuospatial neglect can occur in peripersonal and extrapersonal space. The dorsal visual pathway is hypothesized to be associated with peripersonal, and the ventral pathway with extrapersonal neglect. We aimed to evaluate neural substrates of peripersonal versus extrapersonal neglect, separately for egocentric and allocentric frames of reference. METHODS This was a retrospective study, including stroke patients admitted for inpatient rehabilitation. Approximately 1 month post-stroke onset, computerized cancellation (egocentric) and bisection tasks (egocentric and allocentric) were administered at 30 cm and 120 cm. We collected CT or MRI scans and performed voxel-based lesion-symptom mapping for the cancellation, and subtraction analyses for the line bisection task. RESULTS We included 98 patients for the cancellation and 129 for the bisection analyses. The right parahippocampal gyrus, hippocampus, and thalamus were associated with egocentric peripersonal neglect as measured with cancellation. These areas were also associated with extrapersonal neglect, together with the right superior parietal lobule, angular gyrus, supramarginal gyrus, lateral occipital cortex, planum temporale and superior temporal gyrus. Lesions in the right parietal, temporal and frontal areas were associated with both peripersonal and extrapersonal egocentric neglect as measured with bisection. For allocentric neglect no clear pattern of associated brain regions was observed. DISCUSSION We found right hemispheric anatomical correlates for peripersonal and extrapersonal neglect. However, no brain areas were uniquely associated with peripersonal neglect, meaning we could not conclusively verify the ventral/dorsal hypothesis. Several areas were uniquely associated with egocentric extrapersonal neglect, suggesting that these brain areas can be specifically involved in extrapersonal, but not in peripersonal, attention processes.
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Affiliation(s)
- Antonia F Ten Brink
- Center of Excellence in Rehabilitation Medicine, Brain Center Rudolf Magnus, University Medical Center Utrecht, and De Hoogstraat Rehabilitation, Utrecht, The Netherlands; Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands
| | - J Matthijs Biesbroek
- Department of Neurology, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Quirien Oort
- Center of Excellence in Rehabilitation Medicine, Brain Center Rudolf Magnus, University Medical Center Utrecht, and De Hoogstraat Rehabilitation, Utrecht, The Netherlands
| | - Johanna M A Visser-Meily
- Center of Excellence in Rehabilitation Medicine, Brain Center Rudolf Magnus, University Medical Center Utrecht, and De Hoogstraat Rehabilitation, Utrecht, The Netherlands; Department of Rehabilitation, Physical Therapy Science & Sports, Brain Center Rudolf Magnus, University Medical Center Utrecht, The Netherlands
| | - Tanja C W Nijboer
- Center of Excellence in Rehabilitation Medicine, Brain Center Rudolf Magnus, University Medical Center Utrecht, and De Hoogstraat Rehabilitation, Utrecht, The Netherlands; Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands.
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13
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Extinction as a deficit of the decision-making circuitry in the posterior parietal cortex. HANDBOOK OF CLINICAL NEUROLOGY 2018. [PMID: 29519457 DOI: 10.1016/b978-0-444-63622-5.00008-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register]
Abstract
Extinction is a common neurologic deficit that often occurs as one of a constellation of symptoms seen with lesions of the posterior parietal cortex (PPC). Although extinction has typically been considered a deficit in the allocation of attention, new findings, particularly from nonhuman primate studies, point to one potential and important source of extinction as damage to decision-making circuits for actions within the PPC. This new understanding provides clues to potential therapies for extinction. Also the finding that the PPC is important for action decisions and action planning has led to new neuroprosthetic applications using PPC recordings as control signals to assist paralyzed patients.
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14
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Martín-Arévalo E, Schintu S, Farnè A, Pisella L, Reilly KT. Adaptation to Leftward Shifting Prisms Alters Motor Interhemispheric Inhibition. Cereb Cortex 2018; 28:528-537. [PMID: 27993820 PMCID: PMC6248503 DOI: 10.1093/cercor/bhw386] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 11/15/2016] [Accepted: 11/17/2016] [Indexed: 11/14/2022] Open
Abstract
Adaptation to rightward shifting prisms (rightward prism adaptation, RPA) ameliorates neglect symptoms in patients while adaptation to leftward shifting prisms (leftward prism adaptation, LPA) induces neglect-like behaviors in healthy subjects. It has been hypothesized that prism adaptation (PA) modulates interhemispheric balance between the parietal cortices by inhibiting the posterior parietal cortex (PPC) contralateral to the prismatic deviation, but PA's effects on interhemispheric inhibition (IHI) have not been directly investigated. Since there are hyper-excitable connections between the PPC and primary motor cortex (M1) in the left hemisphere of neglect patients, we reasoned that LPA might mimic right hemisphere lesions by reducing parietal IHI, hyper-exciting the left PPC and PPC-M1 connections, and in turn altering IHI at the motor level. Namely, we hypothesized that LPA would increase IHI from the left to the right M1. We examined changes in left-to-right and right-to-left IHI between the 2 M1s using the ipsilateral silent period (iSP) (Meyer et al. 1995) before and after either LPA or RPA. The iSP was significantly longer after LPA but only from left-to-right and it did not change at all after RPA. This is the first physiological demonstration that LPA alters IHI in the healthy brain.
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Affiliation(s)
- Elisa Martín-Arévalo
- ImpAct team, Lyon Neuroscience Research Center, INSERM
U1028, CRNS-UMR5292, 16 Ave. Doyen Lépine, 69676 Bron
Cedex, France
- Lyon 1 University, F-69373 Lyon, France
| | - Selene Schintu
- ImpAct team, Lyon Neuroscience Research Center, INSERM
U1028, CRNS-UMR5292, 16 Ave. Doyen Lépine, 69676 Bron
Cedex, France
- Lyon 1 University, F-69373 Lyon, France
- Behavioral Neurology Unit, National Institute of
Neurological Disorders and Stroke, National Institutes of Health,
10 Center Bethesda, MD, USA
| | - Alessandro Farnè
- ImpAct team, Lyon Neuroscience Research Center, INSERM
U1028, CRNS-UMR5292, 16 Ave. Doyen Lépine, 69676 Bron
Cedex, France
- Lyon 1 University, F-69373 Lyon, France
- Hospices Civils de Lyon, Neuro-immersion & Mouvement
et Handicap, F-69676 Lyon, France
| | - Laure Pisella
- ImpAct team, Lyon Neuroscience Research Center, INSERM
U1028, CRNS-UMR5292, 16 Ave. Doyen Lépine, 69676 Bron
Cedex, France
- Lyon 1 University, F-69373 Lyon, France
| | - Karen T Reilly
- ImpAct team, Lyon Neuroscience Research Center, INSERM
U1028, CRNS-UMR5292, 16 Ave. Doyen Lépine, 69676 Bron
Cedex, France
- Lyon 1 University, F-69373 Lyon, France
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15
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Abstract
Unilateral spatial neglect is a disabling neurologic deficit, most frequent and severe after right-hemispheric lesions. In most patients neglect involves the left side of space, contralateral to a right-hemispheric lesion. About 50% of stroke patients exhibit neglect in the acute phase. Patients fail to orient, respond to, and report sensory events occurring in the contralateral sides of space and of the body, to explore these portions of space through movements by action effectors (eye, limbs), and to move the contralateral limbs. Neglect is a multicomponent higher-level disorder of spatial awareness, cognition, and attention. Spatial neglect may occur independently of elementary sensory and motor neurologic deficits, but it can mimic and make them more severe. Diagnostic tests include: motor exploratory target cancellation; setting the midpoint of a horizontal line (bisection), that requires the estimation of lateral extent; drawing by copy and from memory; reading, assessing neglect dyslexia; and exploring the side of the body contralateral to the lesion. Activities of daily living scales are also used. Patients are typically not aware of neglect, although they may exhibit varying degrees of awareness toward different components of the deficit. The neural correlates include lesions to the inferior parietal lobule of the posterior parietal cortex, which was long considered the unique neuropathologic correlate of neglect, to the premotor and to the dorsolateral prefrontal cortices, to the posterior superior temporal gyrus, at the temporoparietal junction, to subcortical gray nuclei (thalamus, basal ganglia), and to parietofrontal white-matter fiber tracts, such as the superior longitudinal fascicle. Damage to the inferior parietal lobule of the posterior parietal cortex is specifically associated with the mainly egocentric, perceptual, and exploratory extrapersonal, and with the personal, bodily components of neglect. Productive manifestations, such as perseveration, are not a correlate of posterior parietal cortex damage.
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16
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Bareham CA, Georgieva SD, Kamke MR, Lloyd D, Bekinschtein TA, Mattingley JB. Role of the right inferior parietal cortex in auditory selective attention: An rTMS study. Cortex 2017; 99:30-38. [PMID: 29127879 DOI: 10.1016/j.cortex.2017.10.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 07/28/2017] [Accepted: 10/07/2017] [Indexed: 10/18/2022]
Abstract
Selective attention is the process of directing limited capacity resources to behaviourally relevant stimuli while ignoring competing stimuli that are currently irrelevant. Studies in healthy human participants and in individuals with focal brain lesions have suggested that the right parietal cortex is crucial for resolving competition for attention. Following right-hemisphere damage, for example, patients may have difficulty reporting a brief, left-sided stimulus if it occurs with a competitor on the right, even though the same left stimulus is reported normally when it occurs alone. Such "extinction" of contralesional stimuli has been documented for all the major sense modalities, but it remains unclear whether its occurrence reflects involvement of one or more specific subregions of the temporo-parietal cortex. Here we employed repetitive transcranial magnetic stimulation (rTMS) over the right hemisphere to examine the effect of disruption of two candidate regions - the supramarginal gyrus (SMG) and the superior temporal gyrus (STG) - on auditory selective attention. Eighteen neurologically normal, right-handed participants performed an auditory task, in which they had to detect target digits presented within simultaneous dichotic streams of spoken distractor letters in the left and right channels, both before and after 20 min of 1 Hz rTMS over the SMG, STG or a somatosensory control site (S1). Across blocks, participants were asked to report on auditory streams in the left, right, or both channels, which yielded focused and divided attention conditions. Performance was unchanged for the two focused attention conditions, regardless of stimulation site, but was selectively impaired for contralateral left-sided targets in the divided attention condition following stimulation of the right SMG, but not the STG or S1. Our findings suggest a causal role for the right inferior parietal cortex in auditory selective attention.
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Affiliation(s)
- Corinne A Bareham
- Queensland Brain Institute, The University of Queensland, Australia; Department of Clinical Neurosciences, The University of Cambridge, United Kingdom.
| | | | - Marc R Kamke
- Queensland Brain Institute, The University of Queensland, Australia
| | - David Lloyd
- Queensland Brain Institute, The University of Queensland, Australia
| | - Tristan A Bekinschtein
- Department of Psychology, The University of Cambridge, United Kingdom; Behavioural and Clinical Neurosciences Institute, University of Cambridge, United Kingdom
| | - Jason B Mattingley
- Queensland Brain Institute, The University of Queensland, Australia; School of Psychology, The University of Queensland, Australia
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17
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Aggius-Vella E, Campus C, Finocchietti S, Gori M. Audio Spatial Representation Around the Body. Front Psychol 2017; 8:1932. [PMID: 29249999 PMCID: PMC5715385 DOI: 10.3389/fpsyg.2017.01932] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Accepted: 10/19/2017] [Indexed: 11/13/2022] Open
Abstract
Studies have found that portions of space around our body are differently coded by our brain. Numerous works have investigated visual and auditory spatial representation, focusing mostly on the spatial representation of stimuli presented at head level, especially in the frontal space. Only few studies have investigated spatial representation around the entire body and its relationship with motor activity. Moreover, it is still not clear whether the space surrounding us is represented as a unitary dimension or whether it is split up into different portions, differently shaped by our senses and motor activity. To clarify these points, we investigated audio localization of dynamic and static sounds at different body levels. In order to understand the role of a motor action in auditory space representation, we asked subjects to localize sounds by pointing with the hand or the foot, or by giving a verbal answer. We found that the audio sound localization was different depending on the body part considered. Moreover, a different pattern of response was observed when subjects were asked to make actions with respect to the verbal responses. These results suggest that the audio space around our body is split in various spatial portions, which are perceived differently: front, back, around chest, and around foot, suggesting that these four areas could be differently modulated by our senses and our actions.
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Affiliation(s)
- Elena Aggius-Vella
- Unit for Visually Impaired People, Center for Human Technologies, Istituto Italiano di Tecnologia, Genoa, Italy
| | - Claudio Campus
- Unit for Visually Impaired People, Center for Human Technologies, Istituto Italiano di Tecnologia, Genoa, Italy
| | - Sara Finocchietti
- Unit for Visually Impaired People, Center for Human Technologies, Istituto Italiano di Tecnologia, Genoa, Italy
| | - Monica Gori
- Unit for Visually Impaired People, Center for Human Technologies, Istituto Italiano di Tecnologia, Genoa, Italy
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18
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Filbrich L, Alamia A, Verfaille C, Berquin A, Barbier O, Libouton X, Fraselle V, Mouraux D, Legrain V. Biased visuospatial perception in complex regional pain syndrome. Sci Rep 2017; 7:9712. [PMID: 28852115 PMCID: PMC5574889 DOI: 10.1038/s41598-017-10077-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 08/04/2017] [Indexed: 01/19/2023] Open
Abstract
Complex regional pain syndrome (CRPS) is a chronic pain condition associating sensory, motor, trophic and autonomic symptoms in one limb. Cognitive difficulties have also been reported, affecting the patients’ ability to mentally represent, perceive and use their affected limb. However, the nature of these deficits is still a matter of debate. Recent studies suggest that cognitive deficits are limited to body-related information and body perception, while not extending to external space. Here we challenge that statement, by using temporal order judgment (TOJ) tasks with tactile (i.e. body) or visual (i.e. extra-body) stimuli in patients with upper-limb CRPS. TOJ tasks allow characterizing cognitive biases to the advantage of one of the two sides of space. While the tactile TOJ tasks did not show any significant results, significant cognitive biases were observed in the visual TOJ tasks, affecting mostly the perception of visual stimuli occurring in the immediate vicinity of the affected limb. Our results clearly demonstrate the presence of visuospatial deficits in CRPS, corroborating the cortical contribution to the CRPS pathophysiology, and supporting the utility of developing rehabilitation techniques modifying visuospatial abilities to treat chronic pain.
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Affiliation(s)
- Lieve Filbrich
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium.
| | - Andrea Alamia
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium
| | - Charlotte Verfaille
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium
| | - Anne Berquin
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium.,University Hospital Saint-Luc, Brussels, Belgium
| | - Olivier Barbier
- University Hospital Saint-Luc, Brussels, Belgium.,Institute of Experimental and Clinical Research, Université catholique de Louvain, Brussels, Belgium
| | - Xavier Libouton
- University Hospital Saint-Luc, Brussels, Belgium.,Institute of Experimental and Clinical Research, Université catholique de Louvain, Brussels, Belgium
| | - Virginie Fraselle
- University Hospital Saint-Luc, Brussels, Belgium.,Faculty of Motor Sciences, Université catholique de Louvain, Brussels, Belgium
| | - Dominique Mouraux
- Faculty of Motor Sciences, Université libre de Bruxelles, Brussels, Belgium.,University Hospital Erasme, Brussels, Belgium
| | - Valéry Legrain
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium
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19
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Perception of active head rotation in patients with severe left unilateral spatial neglect. J Clin Neurosci 2017; 41:41-45. [DOI: 10.1016/j.jocn.2017.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 01/22/2017] [Indexed: 11/23/2022]
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20
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Riederer F, Landmann G, Gantenbein AR, Stockinger L, Egloff N, Sprott H, Schleinzer W, Pirrotta R, Dumat W, Luechinger R, Baumgartner C, Kollias S, Sándor PS. Nondermatomal somatosensory deficits in chronic pain are associated with cerebral grey matter changes. World J Biol Psychiatry 2017; 18:227-238. [PMID: 26492569 DOI: 10.3109/15622975.2015.1073356] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
OBJECTIVES Widespread sensory deficits occur in 20-40% of chronic pain patients on the side of pain, independent of pain aetiology, and are known as nondermatomal sensory deficits (NDSDs). NDSDs can occur in absence of central or peripheral nervous system lesions. We hypothesised that NDSDs were associated with cerebral grey matter changes in the sensory system and in pain processing regions, detectable with voxel-based morphometry. METHODS Twenty-five patients with NDSDs, 23 patients without NDSDs ("pain-only"), and 29 healthy controls were studied with high resolution structural MRI of the brain. A comprehensive clinical and psychiatric evaluation based on Diagnostic and Statistical Manual was performed in all patients. RESULTS Patients with NDSDs and "pain-only" did not differ concerning demographic data and psychiatric diagnoses, although anxiety scores (HADS-A) were higher in patients with NDSDs. In patients with NDSDs, grey matter increases were found in the right primary sensory cortex, thalamus, and bilaterally in lateral temporal regions and the hippocampus/fusiform gyrus. "Pain-only" patients showed a bilateral grey matter increase in the posterior insula and less pronounced changes in sensorimotor cortex. CONCLUSIONS Dysfunctional sensory processing in patients with NDSDs is associated with complex changes in grey matter volume, involving the somatosensory system and temporal regions.
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Affiliation(s)
- Franz Riederer
- a Department of Neurology , University Hospital Zurich , Switzerland.,g University of Zurich , Switzerland.,h Karl Landsteiner Institute for Clinical Epilepsy Research and Cognitive Neurology, Neurological Center Rosenhuegel , Vienna , Austria
| | - Gunther Landmann
- b Centre for Pain Medicine , Swiss Paraplegic Centre , Nottwil , Switzerland
| | - Andreas R Gantenbein
- a Department of Neurology , University Hospital Zurich , Switzerland.,f RehaClinic , Bad Zurzach/Baden , Switzerland.,g University of Zurich , Switzerland
| | - Lenka Stockinger
- b Centre for Pain Medicine , Swiss Paraplegic Centre , Nottwil , Switzerland
| | - Niklaus Egloff
- c Psychosomatic Division , C.L. Lory-Haus, Department of General Internal Medicine, Inselspital, University Hospital Bern , Switzerland
| | - Haiko Sprott
- e Arztpraxis Hottingen , Zurich , Switzerland , CH-8053.,g University of Zurich , Switzerland
| | - Wolfgang Schleinzer
- c Psychosomatic Division , C.L. Lory-Haus, Department of General Internal Medicine, Inselspital, University Hospital Bern , Switzerland
| | - Roberto Pirrotta
- i Department of Psychiatry , University Hospital Zurich , Switzerland
| | - Wolfgang Dumat
- b Centre for Pain Medicine , Swiss Paraplegic Centre , Nottwil , Switzerland
| | - Roger Luechinger
- j Institute for Biomedical Engineering , Swiss Federal Institute of Technology and the University of Zurich , Switzerland
| | - Christoph Baumgartner
- h Karl Landsteiner Institute for Clinical Epilepsy Research and Cognitive Neurology, Neurological Center Rosenhuegel , Vienna , Austria
| | - Spyridon Kollias
- d Department of Neuroradiology, University Hospital Zurich , Switzerland
| | - Peter S Sándor
- f RehaClinic , Bad Zurzach/Baden , Switzerland.,g University of Zurich , Switzerland
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21
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Ten Brink AF, Verwer JH, Biesbroek JM, Visser-Meily JMA, Nijboer TCW. Differences between left- and right-sided neglect revisited: A large cohort study across multiple domains. J Clin Exp Neuropsychol 2016; 39:707-723. [DOI: 10.1080/13803395.2016.1262333] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Antonia F. Ten Brink
- Center of Excellence in Rehabilitation Medicine, Brain Center Rudolf Magnus, University Medical Center Utrecht, and De Hoogstraat Rehabilitation, Utrecht, The Netherlands
| | - Jurre H. Verwer
- Department of Neurology, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - J. Matthijs Biesbroek
- Department of Neurology, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Johanna M. A. Visser-Meily
- Center of Excellence in Rehabilitation Medicine, Brain Center Rudolf Magnus, University Medical Center Utrecht, and De Hoogstraat Rehabilitation, Utrecht, The Netherlands
- Department of Rehabilitation, Physical Therapy Science & Sports, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Tanja C. W. Nijboer
- Center of Excellence in Rehabilitation Medicine, Brain Center Rudolf Magnus, University Medical Center Utrecht, and De Hoogstraat Rehabilitation, Utrecht, The Netherlands
- Department of Rehabilitation, Physical Therapy Science & Sports, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
- Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands
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22
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Prism Adaptation Alters Electrophysiological Markers of Attentional Processes in the Healthy Brain. J Neurosci 2016; 36:1019-30. [PMID: 26791229 DOI: 10.1523/jneurosci.1153-15.2016] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Neglect patients typically show a rightward attentional orienting bias and a strong disengagement deficit, such that they are especially slow in responding to left-sided targets after right-sided cues (Posner et al., 1984). Prism adaptation (PA) can reduce diverse debilitating neglect symptoms and it has been hypothesized that PA's effects are so generalized that they might be mediated by attentional mechanisms (Pisella et al., 2006; Redding and Wallace, 2006). In neglect patients, performance on spatial attention tasks improves after rightward-deviating PA (Jacquin-Courtois et al., 2013). In contrast, in healthy subjects, although there is evidence that leftward-deviating PA induces neglect-like performance on some visuospatial tasks, behavioral studies of spatial attention tasks have mostly yielded negative results (Morris et al., 2004; Bultitude et al., 2013). We hypothesized that these negative behavioral findings might reflect the limitations of behavioral measures in healthy subjects. Here we exploited the sensitivity of event-related potentials to test the hypothesis that electrophysiological markers of attentional processes in the healthy human brain are affected by PA. Leftward-deviating PA generated asymmetries in attentional orienting (reflected in the cue-locked N1) and in attentional disengagement for invalidly cued left targets (reflected in the target-locked P1). This is the first electrophysiological demonstration that leftward-deviating PA in healthy subjects mimics attentional patterns typically seen in neglect patients. Significance statement: Prism adaptation (PA) is a promising tool for ameliorating many deficits in neglect patients and inducing neglect-like behavior in healthy subjects. The mechanisms underlying PA's effects are poorly understood but one hypothesis suggests that it acts by modulating attention. To date, however, there has been no successful demonstration of attentional modulation in healthy subjects. We provide the first electrophysiological evidence that PA acts on attention in healthy subjects by mimicking the attentional pattern typically reported in neglect patients: both a rightward attentional orienting bias (reflected in the cue-locked N1) and a deficit in attentional disengagement from the right hemispace (reflected in the target-locked P1). This study makes an important contribution to refining current models of the mechanisms underlying PA's cognitive effects.
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23
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Bolognini N, Convento S, Casati C, Mancini F, Brighina F, Vallar G. Multisensory integration in hemianopia and unilateral spatial neglect: Evidence from the sound induced flash illusion. Neuropsychologia 2016; 87:134-143. [PMID: 27197073 DOI: 10.1016/j.neuropsychologia.2016.05.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 05/13/2016] [Accepted: 05/14/2016] [Indexed: 11/24/2022]
Abstract
Recent neuropsychological evidence suggests that acquired brain lesions can, in some instances, abolish the ability to integrate inputs from different sensory modalities, disrupting multisensory perception. We explored the ability to perceive multisensory events, in particular the integrity of audio-visual processing in the temporal domain, in brain-damaged patients with visual field defects (VFD), or with unilateral spatial neglect (USN), by assessing their sensitivity to the 'Sound-Induced Flash Illusion' (SIFI). The study yielded two key findings. Firstly, the 'fission' illusion (namely, seeing multiple flashes when a single flash is paired with multiple sounds) is reduced in both left- and right-brain-damaged patients with VFD, but not in right-brain-damaged patients with left USN. The disruption of the fission illusion is proportional to the extent of the occipital damage. Secondly, a reliable 'fusion' illusion (namely, seeing less flashes when a single sound is paired with multiple flashes) is evoked in USN patients, but neither in VFD patients nor in healthy participants. A control experiment showed that the fusion, but not the fission, illusion is lost in older participants (>50 year-old), as compared with younger healthy participants (<30 year-old). This evidence indicates that the fission and fusion illusions are dissociable multisensory phenomena, altered differently by impairments of visual perception (i.e. VFD) and spatial attention (i.e. USN). The occipital cortex represents a key cortical site for binding auditory and visual stimuli in the SIFI, while damage to right-hemisphere areas mediating spatial attention and awareness does not prevent the integration of audio-visual inputs in the temporal domain.
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Affiliation(s)
- Nadia Bolognini
- Department of Psychology, and Milan Center for Neuroscience - NeuroMi, University of Milano-Bicocca, Milano, Italy; Laboratory of Neuropsychology, and Department of Neurorehabilitation Sciences, IRCSS Istituto Auxologico, Milano, Italy.
| | - Silvia Convento
- Department of Psychology, and Milan Center for Neuroscience - NeuroMi, University of Milano-Bicocca, Milano, Italy; Department of Neuroscience, Baylor College of Medicine, Houston, USA
| | - Carlotta Casati
- Laboratory of Neuropsychology, and Department of Neurorehabilitation Sciences, IRCSS Istituto Auxologico, Milano, Italy
| | - Flavia Mancini
- Department of Neuroscience, Physiology & Pharmacology, University College London, London, UK
| | - Filippo Brighina
- Department of Experimental Biomedicine and Clinical Neuroscience, University of Palermo, Palermo, Italy
| | - Giuseppe Vallar
- Department of Psychology, and Milan Center for Neuroscience - NeuroMi, University of Milano-Bicocca, Milano, Italy; Laboratory of Neuropsychology, and Department of Neurorehabilitation Sciences, IRCSS Istituto Auxologico, Milano, Italy
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Fordell H, Bodin K, Eklund A, Malm J. RehAtt – scanning training for neglect enhanced by multi-sensory stimulation in Virtual Reality. Top Stroke Rehabil 2016; 23:191-9. [DOI: 10.1080/10749357.2016.1138670] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Semrau JA, Wang JC, Herter TM, Scott SH, Dukelow SP. Relationship between visuospatial neglect and kinesthetic deficits after stroke. Neurorehabil Neural Repair 2014; 29:318-28. [PMID: 25118184 DOI: 10.1177/1545968314545173] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND After stroke, visuospatial and kinesthetic (sense of limb motion) deficits are common, occurring in approximately 30% and 60% of individuals, respectively. Although both types of deficits affect aspects of spatial processing necessary for daily function, few studies have investigated the relationship between these 2 deficits after stroke. OBJECTIVE We aimed to characterize the relationship between visuospatial and kinesthetic deficits after stroke using the Behavioral Inattention Test (BIT) and a robotic measure of kinesthetic function. METHODS Visuospatial attention (using the BIT) and kinesthesia (using robotics) were measured in 158 individuals an average of 18 days after stroke. In the kinesthetic matching task, the robot moved the participant's stroke-affected arm at a preset direction, speed, and magnitude. Participants mirror-matched the robotic movement with the less/unaffected arm as soon as they felt movement in their stroke affected arm. RESULTS We found that participants with visuospatial inattention (neglect) had impaired kinesthesia 100% of the time, whereas only 59% of participants without neglect were impaired. For those without neglect, we observed that a higher percentage of participants with lower but passing BIT scores displayed impaired kinesthetic behavior (78%) compared with those participants who scored perfect or nearly perfect on the BIT (49%). CONCLUSIONS The presence of visuospatial neglect after stroke is highly predictive of the presence of kinesthetic deficits. However, the presence of kinesthetic deficits does not necessarily always indicate the presence of visuospatial neglect. Our findings highlight the importance of assessment and treatment of kinesthetic deficits after stroke, especially in patients with visuospatial neglect.
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Affiliation(s)
- Jennifer A Semrau
- University of Calgary, Calgary, AB, Canada Hotchkiss Brain Institute, Calgary, Alberta, Canada
| | - Jeffery C Wang
- University of Calgary, Calgary, AB, Canada Hotchkiss Brain Institute, Calgary, Alberta, Canada
| | | | | | - Sean P Dukelow
- University of Calgary, Calgary, AB, Canada Hotchkiss Brain Institute, Calgary, Alberta, Canada
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Ulm L, Wohlrapp D, Meinzer M, Steinicke R, Schatz A, Denzler P, Klehmet J, Dohle C, Niedeggen M, Meisel A, Winter Y. A circle-monitor for computerised assessment of visual neglect in peripersonal space. PLoS One 2013; 8:e82892. [PMID: 24349387 PMCID: PMC3861461 DOI: 10.1371/journal.pone.0082892] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 10/28/2013] [Indexed: 11/19/2022] Open
Abstract
UNLABELLED Current assessment of visual neglect involves paper-and-pencil tests or computer-based tasks. Both have been criticised because of their lack of ecological validity as target stimuli can only be presented in a restricted visual range. This study examined the user-friendliness and diagnostic strength of a new "Circle-Monitor" (CM), which enlarges the range of the peripersonal space, in comparison to a standard paper-and-pencil test (Neglect-Test, NET). METHODS Ten stroke patients with neglect and ten age-matched healthy controls were examined by the NET and the CM test comprising of four subtests (Star Cancellation, Line Bisection, Dice Task, and Puzzle Test). RESULTS The acceptance of the CM in elderly controls and neglect patients was high. Participants rated the examination by CM as clear, safe and more enjoyable than NET. Healthy controls performed at ceiling on all subtests, without any systematic differences between the visual fields. Both NET and CM revealed significant differences between controls and patients in Line Bisection, Star Cancellation and visuo-constructive tasks (NET: Figure Copying, CM: Puzzle Test). Discriminant analyses revealed cross-validated assignment of patients and controls to groups was more precise when based on the CM (hit rate 90%) as compared to the NET (hit rate 70%). CONCLUSION The CM proved to be a sensitive novel tool to diagnose visual neglect symptoms quickly and accurately with superior diagnostic validity compared to a standard neglect test while being well accepted by patients. Due to its upgradable functions the system may also be a valuable tool not only to test for non-visual neglect symptoms, but also to provide treatment and assess its outcome.
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Affiliation(s)
- Lena Ulm
- NeuroCure Clinical Research Center and Department of Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Dorota Wohlrapp
- NeuroCure Clinical Research Center and Department of Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Marcus Meinzer
- Center for Stroke Research Berlin, Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Robert Steinicke
- Center for Stroke Research Berlin, Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Alexej Schatz
- Department of Biology, Humboldt University Berlin and Cluster of Excellence NeuroCure, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | | | - Juliane Klehmet
- NeuroCure Clinical Research Center and Department of Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Christian Dohle
- Center for Stroke Research Berlin, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Median Klinik Berlin-Kladow, Berlin, Germany
- Center for Rehabilitation Research, University of Potsdam, Potsdam, Germany
| | - Michael Niedeggen
- Department of Educational Science and Psychology, Free University Berlin, Berlin, Germany
- * E-mail: (AM); (MN)
| | - Andreas Meisel
- NeuroCure Clinical Research Center and Department of Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany
- Center for Stroke Research Berlin, Charité – Universitätsmedizin Berlin, Berlin, Germany
- * E-mail: (AM); (MN)
| | - York Winter
- Department of Biology, Humboldt University Berlin and Cluster of Excellence NeuroCure, Charité - Universitätsmedizin Berlin, Berlin, Germany
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Brozzoli C, Ehrsson HH, Farnè A. Multisensory Representation of the Space Near the Hand. Neuroscientist 2013; 20:122-35. [DOI: 10.1177/1073858413511153] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
When interacting with objects and other people, the brain needs to locate our limbs and the relevant visual information surrounding them. Studies on monkeys showed that information from different sensory modalities converge at the single cell level within a set of interconnected multisensory frontoparietal areas. It is largely accepted that this network allows for multisensory processing of the space surrounding the body (peripersonal space), whose function has been linked to the sensory guidance of appetitive and defensive movements, and localization of the limbs in space. In the current review, we consider multidisciplinary findings about the processing of the space near the hands in humans and offer a convergent view of its functions and underlying neural mechanisms. We will suggest that evolution has provided the brain with a clever tool for representing visual information around the hand, which takes the hand itself as a reference for the coding of surrounding visual space. We will contend that the hand-centered representation of space, known as perihand space, is a multisensory-motor interface that allows interaction with the objects and other persons around us.
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Affiliation(s)
- Claudio Brozzoli
- Brain, Body and Self Laboratory, Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - H. Henrik Ehrsson
- Brain, Body and Self Laboratory, Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Alessandro Farnè
- INSERM U1028, CNRS UMR5292, Lyon Neuroscience Research Centre, ImpAct Team, Lyon, France
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Ishihara M, Revol P, Jacquin-Courtois S, Mayet R, Rode G, Boisson D, Farnè A, Rossetti Y. Tonal cues modulate line bisection performance: preliminary evidence for a new rehabilitation prospect? Front Psychol 2013; 4:704. [PMID: 24109467 PMCID: PMC3791388 DOI: 10.3389/fpsyg.2013.00704] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Accepted: 09/15/2013] [Indexed: 11/15/2022] Open
Abstract
The effect of the presentation of two different auditory pitches (high and low) on manual line-bisection performance was studied to investigate the relationship between space and magnitude representations underlying motor acts. Participants were asked to mark the midpoint of a given line with a pen while they were listening a pitch via headphones. In healthy participants, the effect of the presentation order (blocked or alternative way) of auditory stimuli was tested (Experiment 1). The results showed no biasing effect of pitch in blocked-order presentation, whereas the alternative presentation modulated the line-bisection. Lower pitch produced leftward or downward bisection biases whereas higher pitch produced rightward or upward biases, suggesting that visuomotor processing can be spatially modulated by irrelevant auditory cues. In Experiment 2, the effect of such alternative stimulations in line bisection in right brain damaged patients with a unilateral neglect and without a neglect was tested. Similar biasing effects caused by auditory cues were observed although the white noise presentation also affected the patient's performance. Additionally, the effect of pitch difference was larger for the neglect patient than for the no-neglect patient as well as for healthy participants. The neglect patient's bisection performance gradually improved during the experiment and was maintained even after 1 week. It is therefore, concluded that auditory cues, characterized by both the pitch difference and the dynamic alternation, influence spatial representations. The larger biasing effect seen in the neglect patient compared to the no-neglect patient and healthy participants suggests that auditory cues could modulate the direction of the attentional bias that is characteristic of neglect patients. Thus, the alternative presentation of auditory cues could be used as rehabilitation for neglect patients. The space-pitch associations are discussed in terms of a generalized magnitude system.
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Affiliation(s)
- Masami Ishihara
- Department of Psychology, Tokyo Metropolitan University, Hachioji Tokyo, Japan
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Shaqiri A, Anderson B, Danckert J. Statistical learning as a tool for rehabilitation in spatial neglect. Front Hum Neurosci 2013; 7:224. [PMID: 23754998 PMCID: PMC3665923 DOI: 10.3389/fnhum.2013.00224] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2013] [Accepted: 05/09/2013] [Indexed: 11/13/2022] Open
Abstract
We propose that neglect includes a disorder of representational updating. Representational updating refers to our ability to build mental models and adapt those models to changing experience. This updating ability depends on the processes of priming, working memory, and statistical learning. These processes in turn interact with our capabilities for sustained attention and precise temporal processing. We review evidence showing that all these non-spatial abilities are impaired in neglect, and we discuss how recognition of such deficits can lead to novel approaches for rehabilitating neglect.
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Affiliation(s)
- Albulena Shaqiri
- Department of Psychology, Cognitive Neuroscience, University of Waterloo, Waterloo, ON, Canada
| | - Britt Anderson
- Department of Psychology, Cognitive Neuroscience, University of Waterloo, Waterloo, ON, Canada
- Center for Theoretical Neuroscience, University of Waterloo, Waterloo, ON, Canada
| | - James Danckert
- Department of Psychology, Cognitive Neuroscience, University of Waterloo, Waterloo, ON, Canada
- Center for Theoretical Neuroscience, University of Waterloo, Waterloo, ON, Canada
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Ptak R, Fellrath J. Spatial neglect and the neural coding of attentional priority. Neurosci Biobehav Rev 2013; 37:705-22. [DOI: 10.1016/j.neubiorev.2013.01.026] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 12/11/2012] [Accepted: 01/28/2013] [Indexed: 11/27/2022]
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Bolognini N, Convento S, Rossetti A, Merabet LB. Multisensory processing after a brain damage: Clues on post-injury crossmodal plasticity from neuropsychology. Neurosci Biobehav Rev 2013; 37:269-78. [DOI: 10.1016/j.neubiorev.2012.12.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Revised: 10/03/2012] [Accepted: 12/09/2012] [Indexed: 11/28/2022]
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The right planum temporale is involved in stimulus-driven, auditory attention--evidence from transcranial magnetic stimulation. PLoS One 2013; 8:e57316. [PMID: 23437367 PMCID: PMC3577729 DOI: 10.1371/journal.pone.0057316] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 01/21/2013] [Indexed: 11/19/2022] Open
Abstract
It is well known that the planum temporale (PT) area in the posterior temporal lobe carries out spectro-temporal analysis of auditory stimuli, which is crucial for speech, for example. There are suggestions that the PT is also involved in auditory attention, specifically in the discrimination and selection of stimuli from the left and right ear. However, direct evidence is missing so far. To examine the role of the PT in auditory attention we asked fourteen participants to complete the Bergen Dichotic Listening Test. In this test two different consonant-vowel syllables (e.g., “ba” and “da”) are presented simultaneously, one to each ear, and participants are asked to verbally report the syllable they heard best or most clearly. Thus attentional selection of a syllable is stimulus-driven. Each participant completed the test three times: after their left and right PT (located with anatomical brain scans) had been stimulated with repetitive transcranial magnetic stimulation (rTMS), which transiently interferes with normal brain functioning in the stimulated sites, and after sham stimulation, where participants were led to believe they had been stimulated but no rTMS was applied (control). After sham stimulation the typical right ear advantage emerged, that is, participants reported relatively more right than left ear syllables, reflecting a left-hemispheric dominance for language. rTMS over the right but not left PT significantly reduced the right ear advantage. This was the result of participants reporting more left and fewer right ear syllables after right PT stimulation, suggesting there was a leftward shift in stimulus selection. Taken together, our findings point to a new function of the PT in addition to auditory perception: particularly the right PT is involved in stimulus selection and (stimulus-driven), auditory attention.
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