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Culicetto L, Giustiniani A, Lo Buono V, Cazzato V, Falzone A, Vicario CM, Quartarone A, Marino S. From real to virtual prism adaptation therapy: a systematic review on benefits and challenges of a new potential rehabilitation approach. Front Psychol 2024; 15:1391711. [PMID: 38966730 PMCID: PMC11222640 DOI: 10.3389/fpsyg.2024.1391711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 06/11/2024] [Indexed: 07/06/2024] Open
Abstract
Prism adaptation (PA) is a sensorimotor technique that has been shown to alleviate neglect symptoms. Due to its demonstrated functional effectiveness, PA has recently been implemented in virtual reality environments. However, research on virtual prism adaptation (VPA) is limited and it lacks a standardized methodological approach. It is crucial to investigate whether VPA can be effective in inducing traditional effect of PA and to have potential utility in a rehabilitation context. Clarifying this aspect would allow the use of VPA in a wider range of contexts and neurological disorders, with the additional opportunity to overcome PA traditional limits. The aim of the present study is to revise current literature on VPA in both healthy individuals and patients highlighting also its advantages and limitations. Studies performed between 2013 and 2023 and fulfilling the inclusion criteria were searched on three electronic databases, by combining the terms "Virtual prism adaptation" and "Virtual prism adaptation therapy. Out of 123 articles, only 16 met the inclusion criteria. The current literature review suggests that VPA may serve as a potentially useful tool for inducing visuomotor adaptation, with most studies conducted in healthy individuals. The high variability in the methodologies observed among studies suggests that more standardized approaches are needed to gain a deeper understanding of the mechanisms underlying adaptation and aftereffects when PA is administered in a virtual environment. Future studies should also address practical applications and clinical efficacy of VPA, particularly in patients with spatial neglect.
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Affiliation(s)
| | | | | | - Valentina Cazzato
- Dipartimento di Scienze Cognitive, Psicologiche, Pedagogiche e Degli Studi Culturali, Università di Messina, Messina, Italy
- School of Psychology, Faculty of Health, Liverpool John Moores University, Liverpool, United Kingdom
| | - Alessandra Falzone
- Dipartimento di Scienze Cognitive, Psicologiche, Pedagogiche e Degli Studi Culturali, Università di Messina, Messina, Italy
| | - Carmelo Mario Vicario
- Dipartimento di Scienze Cognitive, Psicologiche, Pedagogiche e Degli Studi Culturali, Università di Messina, Messina, Italy
| | | | - Silvia Marino
- IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy
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2
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Lustig A, Wilf M, Dudkiewicz I, Plotnik M. Higher cognitive load interferes with head-hand coordination: virtual reality-based study. Sci Rep 2023; 13:17632. [PMID: 37848473 PMCID: PMC10582046 DOI: 10.1038/s41598-023-43337-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 09/21/2023] [Indexed: 10/19/2023] Open
Abstract
Daily life activities often involve decision-based reaching movements in different contexts and circumstances. These activities span a wide array of cognitive load types we face while executing motor functions. Here we use a virtual reality-based neurocognitive testing platform to assess cognitive-induced changes in motor behavior as reflected by modulations in head-hand coordination. Our paradigm is based on the Color Trails Test (CTT), which is designed to assess two types of cognitive functions: Trails A-sustained visual attention (SVA), and Trails B-divided attention (DA). The virtual reality CTT adaptation (VR-CTT) requires execution of large multi-directional hand movements and head rotations. We employed a cross-correlation analysis on hand and head kinematics data collected from 122 healthy participants (ages: 20-90 years; divided as follows: young, middle-aged, and older adults) who completed the VR-CTT. The level of spatial coherence of head-hand movements was found to be high (R ≥ 0.76) in both Trails A and B, in all age groups. However, assessing head-hand phase shifts revealed longer time lags (i.e., in which head leads hand) in Trails B versus Trails A, in all age groups. We conclude that allocating cognitive resources to DA task reduces head-hand synchrony as compared to SVA conditions.
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Affiliation(s)
- Adi Lustig
- Center of Advanced Technologies in Rehabilitation, Sheba Medical Center, Ramat Gan, Israel
- Department of Physiology and Pharmacology, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Meytal Wilf
- Center of Advanced Technologies in Rehabilitation, Sheba Medical Center, Ramat Gan, Israel
- Department of Physiology and Pharmacology, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Israel Dudkiewicz
- Division of Rehabilitation, Sheba Medical Center, Ramat Gan, Israel
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Meir Plotnik
- Center of Advanced Technologies in Rehabilitation, Sheba Medical Center, Ramat Gan, Israel.
- Department of Physiology and Pharmacology, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
- Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel.
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3
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Marchesotti S, Bernasconi F, Rognini G, De Lucia M, Bleuler H, Blanke O. Neural signatures of visuo-motor integration during human-robot interactions. Front Neurorobot 2023; 16:1034615. [PMID: 36776553 PMCID: PMC9908758 DOI: 10.3389/fnbot.2022.1034615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 11/23/2022] [Indexed: 01/28/2023] Open
Abstract
Visuo-motor integration shapes our daily experience and underpins the sense of feeling in control over our actions. The last decade has seen a surge in robotically and virtually mediated interactions, whereby bodily actions ultimately result in an artificial movement. But despite the growing number of applications, the neurophysiological correlates of visuo-motor processing during human-machine interactions under dynamic conditions remain scarce. Here we address this issue by employing a bimanual robotic interface able to track voluntary hands movement, rendered in real-time into the motion of two virtual hands. We experimentally manipulated the visual feedback in the virtual reality with spatial and temporal conflicts and investigated their impact on (1) visuo-motor integration and (2) the subjective experience of being the author of one's action (i.e., sense of agency). Using somatosensory evoked responses measured with electroencephalography, we investigated neural differences occurring when the integration between motor commands and visual feedback is disrupted. Our results show that the right posterior parietal cortex encodes for differences between congruent and spatially-incongruent interactions. The experimental manipulations also induced a decrease in the sense of agency over the robotically-mediated actions. These findings offer solid neurophysiological grounds that can be used in the future to monitor integration mechanisms during movements and ultimately enhance subjective experience during human-machine interactions.
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Affiliation(s)
- Silvia Marchesotti
- Laboratory of Cognitive Neuroscience, Center for Neuroprosthetics and Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne, Geneva, Switzerland,Laboratory of Robotic Systems, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland,*Correspondence: Silvia Marchesotti
| | - Fosco Bernasconi
- Laboratory of Cognitive Neuroscience, Center for Neuroprosthetics and Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne, Geneva, Switzerland
| | - Giulio Rognini
- Laboratory of Cognitive Neuroscience, Center for Neuroprosthetics and Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne, Geneva, Switzerland,Laboratory of Robotic Systems, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Marzia De Lucia
- Laboratoire de Recherche en Neuroimagerie, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland
| | - Hannes Bleuler
- Laboratory of Robotic Systems, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Olaf Blanke
- Laboratory of Cognitive Neuroscience, Center for Neuroprosthetics and Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne, Geneva, Switzerland,Department of Clinical Neurosciences, Faculty of Medicine, University Hospital, Geneva, Switzerland,Olaf Blanke
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4
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Fleury L, Dreyer L, El Makkaoui R, Leroy E, Rossetti Y, Collet C. Inter-Task Transfer of Prism Adaptation through Motor Imagery. Brain Sci 2023; 13:brainsci13010114. [PMID: 36672095 PMCID: PMC9857236 DOI: 10.3390/brainsci13010114] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/30/2022] [Accepted: 01/04/2023] [Indexed: 01/10/2023] Open
Abstract
Prism adaptation (PA) is a useful method to investigate short-term sensorimotor plasticity. Following active exposure to prisms, individuals show consistent after-effects, probing that they have adapted to the perturbation. Whether after-effects are transferable to another task or remain specific to the task performed under exposure, represents a crucial interest to understand the adaptive processes at work. Motor imagery (MI, i.e., the mental representation of an action without any concomitant execution) offers an original opportunity to investigate the role of cognitive aspects of motor command preparation disregarding actual sensory and motor information related to its execution. The aim of the study was to test whether prism adaptation through MI led to transferable after-effects. Forty-four healthy volunteers were exposed to a rightward prismatic deviation while performing actual (Active group) versus imagined (MI group) pointing movements, or while being inactive (inactive group). Upon prisms removal, in the MI group, only participants with the highest MI abilities (MI+ group) showed consistent after-effects on pointing and, crucially, a significant transfer to throwing. This was not observed in participants with lower MI abilities and in the inactive group. However, a direct comparison of pointing after-effects and transfer to throwing between MI+ and the control inactive group did not show any significant difference. Although this interpretation requires caution, these findings suggest that exposure to intersensory conflict might be responsible for sensory realignment during prism adaptation which could be transferred to another task. This study paves the way for further investigations into MI's potential to develop robust sensorimotor adaptation.
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Affiliation(s)
- Lisa Fleury
- INSERM UMR-S U1028, CNRS UMS 5292, Trajectoires Lyon Neuroscience Research Center (CRNL), 69500 Bron, France. Claude Bernard University of Lyon 1, 69100 Villeurbanne, France
- Inter-University Laboratory of Human Movement Biology (EA 7424), Claude Bernard University of Lyon 1, 69100 Villeurbanne, France
- Defitech Chair of Clinical Neuroengineering, Neuro-X Institute (INX) and Brain Mind Institute (BMI), École Polytechnique Fédérale de Lausanne (EPFL) Valais, 1950 Sion, Switzerland
- Correspondence:
| | - Léa Dreyer
- Department of Psychology, University of Lyon 2, 69007 Lyon, France
| | - Rola El Makkaoui
- Department of Psychology, University of Lyon 2, 69007 Lyon, France
| | - Elise Leroy
- Department of Psychology, University of Lyon 2, 69007 Lyon, France
| | - Yves Rossetti
- INSERM UMR-S U1028, CNRS UMS 5292, Trajectoires Lyon Neuroscience Research Center (CRNL), 69500 Bron, France. Claude Bernard University of Lyon 1, 69100 Villeurbanne, France
- “Mouvement et Handicap” Platform, Neurological Hospital, Hospices Civils de Lyon, 69500 Bron, France
| | - Christian Collet
- Inter-University Laboratory of Human Movement Biology (EA 7424), Claude Bernard University of Lyon 1, 69100 Villeurbanne, France
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Wilf M, Dupuis C, Nardo D, Huber D, Sander S, Al-Kaar J, Haroud M, Perrin H, Fornari E, Crottaz-Herbette S, Serino A. Virtual reality-based sensorimotor adaptation shapes subsequent spontaneous and naturalistic stimulus-driven brain activity. Cereb Cortex 2022; 33:5163-5180. [PMID: 36288926 PMCID: PMC10152055 DOI: 10.1093/cercor/bhac407] [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: 03/09/2022] [Revised: 09/15/2022] [Accepted: 09/16/2022] [Indexed: 11/12/2022] Open
Abstract
Our everyday life summons numerous novel sensorimotor experiences, to which our brain needs to adapt in order to function properly. However, tracking plasticity of naturalistic behavior and associated brain modulations is challenging. Here, we tackled this question implementing a prism adaptation-like training in virtual reality (VRPA) in combination with functional neuroimaging. Three groups of healthy participants (N = 45) underwent VRPA (with a shift either to the left/right side, or with no shift), and performed functional magnetic resonance imaging (fMRI) sessions before and after training. To capture modulations in free-flowing, task-free brain activity, the fMRI sessions included resting-state and free-viewing of naturalistic videos. We found significant decreases in spontaneous functional connectivity between attentional and default mode (DMN)/fronto-parietal networks, only for the adaptation groups, more pronouncedly in the hemisphere contralateral to the induced shift. In addition, VRPA was found to bias visual responses to naturalistic videos: Following rightward adaptation, we found upregulation of visual response in an area in the parieto-occipital sulcus (POS) only in the right hemisphere. Notably, the extent of POS upregulation correlated with the size of the VRPA-induced after-effect measured in behavioral tests. This study demonstrates that a brief VRPA exposure can change large-scale cortical connectivity and correspondingly bias visual responses to naturalistic sensory inputs.
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Affiliation(s)
- Meytal Wilf
- MySpace Lab, Department of Clinical Neurosciences, Lausanne University Hospital (CHUV) and University of Lausanne, Avenue Pierre Decker 5, 1011 Lausanne, Switzerland.,Center of Advanced Technologies in Rehabilitation (CATR), Sheba Medical Center, Tel Hashomer 52621, Israel
| | - Celine Dupuis
- MindMaze SA, Chemin de Roseneck 5, 1006 Lausanne, Switzerland
| | - Davide Nardo
- MRC Cognition and Brain Sciences Unit, University of Cambridge, 15 Chaucer Rd, Cambridge CB2 7EF, United Kingdom.,Department of Education, University of Roma Tre, Rome, Italy
| | - Diana Huber
- MySpace Lab, Department of Clinical Neurosciences, Lausanne University Hospital (CHUV) and University of Lausanne, Avenue Pierre Decker 5, 1011 Lausanne, Switzerland
| | - Sibilla Sander
- MySpace Lab, Department of Clinical Neurosciences, Lausanne University Hospital (CHUV) and University of Lausanne, Avenue Pierre Decker 5, 1011 Lausanne, Switzerland
| | - Joud Al-Kaar
- Neuropsychology and Neurorehabilitation Service, Lausanne University Hospital (CHUV) and University of Lausanne, Avenue Pierre Decker 5, 1011 Lausanne, Switzerland
| | - Meriem Haroud
- MySpace Lab, Department of Clinical Neurosciences, Lausanne University Hospital (CHUV) and University of Lausanne, Avenue Pierre Decker 5, 1011 Lausanne, Switzerland.,Neuropsychology and Neurorehabilitation Service, Lausanne University Hospital (CHUV) and University of Lausanne, Avenue Pierre Decker 5, 1011 Lausanne, Switzerland
| | - Henri Perrin
- MySpace Lab, Department of Clinical Neurosciences, Lausanne University Hospital (CHUV) and University of Lausanne, Avenue Pierre Decker 5, 1011 Lausanne, Switzerland
| | - Eleonora Fornari
- Biomedical Imaging Center (CIBM), Department of Radiology, Lausanne University Hospital (CHUV) and University of Lausanne, Rue du Bugnon 46, 1011 Lausanne, Switzerland
| | - Sonia Crottaz-Herbette
- MindMaze SA, Chemin de Roseneck 5, 1006 Lausanne, Switzerland.,Neuropsychology and Neurorehabilitation Service, Lausanne University Hospital (CHUV) and University of Lausanne, Avenue Pierre Decker 5, 1011 Lausanne, Switzerland
| | - Andrea Serino
- MySpace Lab, Department of Clinical Neurosciences, Lausanne University Hospital (CHUV) and University of Lausanne, Avenue Pierre Decker 5, 1011 Lausanne, Switzerland.,MindMaze SA, Chemin de Roseneck 5, 1006 Lausanne, Switzerland
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Albini F, Pisoni A, Salvatore A, Calzolari E, Casati C, Marzoli SB, Falini A, Crespi SA, Godi C, Castellano A, Bolognini N, Vallar G. Aftereffects to Prism Exposure without Adaptation: A Single Case Study. Brain Sci 2022; 12:brainsci12040480. [PMID: 35448011 PMCID: PMC9028811 DOI: 10.3390/brainsci12040480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 03/07/2022] [Accepted: 03/24/2022] [Indexed: 02/05/2023] Open
Abstract
Visuo-motor adaptation to optical prisms (Prism Adaptation, PA), displacing the visual scene laterally, is a behavioral method used for the experimental investigation of visuomotor plasticity, and, in clinical settings, for temporarily ameliorating and rehabilitating unilateral spatial neglect. This study investigated the building up of PA, and the presence of the typically occurring subsequent Aftereffects (AEs) in a brain-damaged patient (TMA), suffering from apperceptive agnosia and a right visual half-field defect, with bilateral atrophy of the parieto-occipital cortices, regions involved in PA and AEs. Base-Right prisms and control neutral lenses were used. PA was achieved by repeated pointing movements toward three types of stimuli: visual, auditory, and bimodal audio-visual. The presence and the magnitude of AEs were assessed by proprioceptive, visual, visuo-proprioceptive, and auditory-proprioceptive straight-ahead pointing tasks. The patient’s brain connectivity was investigated by Diffusion Tensor Imaging (DTI). Unlike control participants, TMA did not show any adaptation to prism exposure, but her AEs were largely preserved. These findings indicate that AEs may occur even in the absence of PA, as indexed by the reduction of the pointing error, showing a dissociation between the classical measures of PA and AEs. In the PA process, error reduction, and its feedback, may be less central to the building up of AEs, than the sensorimotor pointing activity per se.
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Affiliation(s)
- Federica Albini
- Department of Psychology, University of Milano-Bicocca, 20126 Milano, Italy; (A.P.); (A.S.); (N.B.)
- Correspondence: or (F.A.); (G.V.)
| | - Alberto Pisoni
- Department of Psychology, University of Milano-Bicocca, 20126 Milano, Italy; (A.P.); (A.S.); (N.B.)
| | - Anna Salvatore
- Department of Psychology, University of Milano-Bicocca, 20126 Milano, Italy; (A.P.); (A.S.); (N.B.)
| | - Elena Calzolari
- Neuro-Otology Unit, Division of Brain Sciences, Imperial College London, London SW7 2AZ, UK;
| | - Carlotta Casati
- Experimental Laboratory of Research in Clinical Neuropsychology, IRCCS Istituto Auxologico Italiano, 20155 Milano, Italy;
- Department of Neurorehabilitation Sciences, IRCCS Istituto Auxologico Italiano, 20155 Milano, Italy
| | - Stefania Bianchi Marzoli
- Laboratory of Neuro-Ophthalmology and Ocular Electrophysiology, IRCCS Istituto Auxologico Italiano, 20155 Milano, Italy;
| | - Andrea Falini
- Neuroradiology Unit and CERMAC, IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University, 20132 Milano, Italy; (A.F.); (S.A.C.); (C.G.); (A.C.)
| | - Sofia Allegra Crespi
- Neuroradiology Unit and CERMAC, IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University, 20132 Milano, Italy; (A.F.); (S.A.C.); (C.G.); (A.C.)
| | - Claudia Godi
- Neuroradiology Unit and CERMAC, IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University, 20132 Milano, Italy; (A.F.); (S.A.C.); (C.G.); (A.C.)
| | - Antonella Castellano
- Neuroradiology Unit and CERMAC, IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University, 20132 Milano, Italy; (A.F.); (S.A.C.); (C.G.); (A.C.)
| | - Nadia Bolognini
- Department of Psychology, University of Milano-Bicocca, 20126 Milano, Italy; (A.P.); (A.S.); (N.B.)
- Experimental Laboratory of Research in Clinical Neuropsychology, IRCCS Istituto Auxologico Italiano, 20155 Milano, Italy;
| | - Giuseppe Vallar
- Department of Psychology, University of Milano-Bicocca, 20126 Milano, Italy; (A.P.); (A.S.); (N.B.)
- Experimental Laboratory of Research in Clinical Neuropsychology, IRCCS Istituto Auxologico Italiano, 20155 Milano, Italy;
- Correspondence: or (F.A.); (G.V.)
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Kaiser AP, Villadsen KW, Samani A, Knoche H, Evald L. Virtual Reality and Eye-Tracking Assessment, and Treatment of Unilateral Spatial Neglect: Systematic Review and Future Prospects. Front Psychol 2022; 13:787382. [PMID: 35391965 PMCID: PMC8982678 DOI: 10.3389/fpsyg.2022.787382] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 01/26/2022] [Indexed: 11/17/2022] Open
Abstract
Unilateral spatial neglect (USN) is a disorder characterized by the failure to report, respond to, or orient toward the contralateral side of space to a brain lesion. Current assessment methods often fail to discover milder forms, cannot differentiate between unilateral spatial neglect subtypes and lack ecological validity. There is also a need for treatment methods that target subtypes. Immersive virtual reality (VR) systems in combination with eye-tracking (ET) have the potential to overcome these shortcomings, by providing more naturalistic environments and tasks, with sensitive and detailed measures. This systematic review examines the state of the art of research on these technologies as applied in the assessment and treatment of USN. As we found no studies that combined immersive VR and ET, we reviewed these approaches individually. The review of VR included seven articles, the ET review twelve. The reviews revealed promising results. (1) All included studies found significant group-level differences for several USN measures. In addition, several studies found asymmetric behavior in VR and ET tasks for patients who did not show signs of USN in conventional tests. Particularly promising features were multitasking in complex VR environments and detailed eye-movement analysis. (2) No VR and only a few ET studies attempted to differentiate USN subtypes, although the technologies appeared appropriate. One ET study grouped USN participants using individual heatmaps, and another differentiated between subtypes on drawing tasks. Regarding (3) ecological validity, although no studies tested the prognostic validity of their assessment methods, VR and ET studies utilized naturalistic tasks and stimuli reflecting everyday situations. Technological characteristics, such as the field of view and refresh rate of the head-mounted displays, could be improved, though, to improve ecological validity. We found (4) no studies that utilized VR or ET technologies for USN treatment up until the search date of the 26th of February 2020. In conclusion, VR-ET-based systems show great potential for USN assessment. VR-ET holds great promise for treatment, for example, by monitoring behavior and adapting and tailoring to the individual person's needs and abilities. Future research should consider developing methods for individual subtypes and differential diagnostics to inform individual treatment programs.
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Affiliation(s)
- Alexander Pilgaard Kaiser
- Hammel Neurorehabilitation Centre and University Research Clinic, Hammel, Denmark,Department of Psychology and Behavioral Sciences, Aarhus University, Aarhus, Denmark
| | - Kristian Westergaard Villadsen
- Hammel Neurorehabilitation Centre and University Research Clinic, Hammel, Denmark,Aalborg University Hospital, Aalborg University, Aalborg, Denmark
| | - Afshin Samani
- Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Hendrik Knoche
- Department of Architecture, Design and Media Technology, Aalborg University, Aalborg, Denmark
| | - Lars Evald
- Hammel Neurorehabilitation Centre and University Research Clinic, Hammel, Denmark,Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark,*Correspondence: Lars Evald,
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Feasibility study of immersive virtual prism adaptation therapy with depth-sensing camera using functional near-infrared spectroscopy in healthy adults. Sci Rep 2022; 12:767. [PMID: 35031675 PMCID: PMC8760318 DOI: 10.1038/s41598-022-04771-5] [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: 04/17/2021] [Accepted: 12/22/2021] [Indexed: 11/08/2022] Open
Abstract
Prism Adaptation (PA) is used to alleviate spatial neglect. We combined immersive virtual reality with a depth-sensing camera to develop virtual prism adaptation therapy (VPAT), which block external visual cues and easily quantify and monitor errors than conventional PA. We conducted a feasibility study to investigate whether VPAT can induce behavioral adaptations by measuring after-effect and identifying which cortical areas were most significantly activated during VPAT using functional near-infrared spectroscopy (fNIRS). Fourteen healthy subjects participated in this study. The experiment consisted of four sequential phases (pre-VPAT, VPAT-10°, VPAT-20°, and post-VPAT). To compare the most significantly activated cortical areas during pointing in different phases against pointing during the pre-VPAT phase, we analyzed changes in oxyhemoglobin concentration using fNIRS during pointing. The pointing errors of the virtual hand deviated to the right-side during early pointing blocks in the VPAT-10° and VPAT-20° phases. There was a left-side deviation of the real hand to the target in the post-VPAT phase, demonstrating after-effect. The most significantly activated channels during pointing tasks were located in the right hemisphere, and possible corresponding cortical areas included the dorsolateral prefrontal cortex and frontal eye field. In conclusion, VPAT may induce behavioral adaptation with modulation of the dorsal attentional network.
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