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Rich TJ, Williams LJ, Bowen A, Eskes GA, Hreha K, Checketts M, Mancuso M, Fordell H, Chen P. An International and Multidisciplinary Consensus on the Labeling of Spatial Neglect Using a Modified Delphi Method. Arch Rehabil Res Clin Transl 2024; 6:100343. [PMID: 39006109 PMCID: PMC11240031 DOI: 10.1016/j.arrct.2024.100343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024] Open
Abstract
Survivors of neurologic injury (most commonly stroke or traumatic brain injury) frequently experience a disorder in which contralesionally positioned objects or the contralesional features of individual objects are often left unattended or underappreciated. The disorder is known by >200 unique labels in the literature, which potentially causes confusion for patients and their families, complicates literature searches for researchers and clinicians, and promotes a fractionated conceptualization of the disorder. The objective of this Delphi was to determine if consensus (≥75% agreement) could be reached by an international and multidisciplinary panel of researchers and clinicians with expertise on the topic. To accomplish this aim, we used a modified Delphi method in which 66 researchers and/or clinicians with expertise on the topic completed at least 1 of 4 iterative rounds of surveys. Per the Delphi method, panelists were provided with results from each round prior to responding to the survey in the subsequent round with the explicit intention of achieving consensus. The panel ultimately reached consensus that the disorder should be consistently labeled spatial neglect. Based on the consensus reached by our expert panel, we recommend that researchers and clinicians use the label spatial neglect when describing the disorder in general and more specific labels pertaining to subtypes of the disorder when appropriate.
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Affiliation(s)
- Timothy J. Rich
- Center for Stroke Rehabilitation Research, Kessler Foundation, West Orange, NJ, United States
- Department of Physical Medicine and Rehabilitation, Rutgers New Jersey Medical School, Newark, NJ, United States
| | - Lindy J. Williams
- Allied Health and Human Performance Academic Unit, University of South Australia, Adelaide, South Australia, Australia
| | - Audrey Bowen
- Manchester Centre for Health Psychology, and the Geoffrey Jefferson Brain Research Centre, University of Manchester, Salford, United Kingdom
| | - Gail A. Eskes
- Departments of Psychiatry and Psychology & Neuroscience, Life Sciences Centre - Oceanography, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Kimberly Hreha
- Department of Orthopaedic Surgery, Occupational Therapy Doctorate Division, Duke University School of Medicine, Durham, NC, United States
| | - Matthew Checketts
- Geoffrey Jefferson Brain Research Centre, The Manchester Academic Health Science Centre, Northern Care Alliance & University of Manchester, Salford, United Kingdom
| | - Mauro Mancuso
- Physical and Rehabilitative Medicine Unit, Italian National Health Service Az-Azienda, USL, Tuscany, Italy
| | - Helena Fordell
- Department of Clinical Science, Neurosciences, Umeå University, Umeå, Sweden
| | - Peii Chen
- Center for Stroke Rehabilitation Research, Kessler Foundation, West Orange, NJ, United States
- Department of Physical Medicine and Rehabilitation, Rutgers New Jersey Medical School, Newark, NJ, United States
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Lim J, Lee SH. Spatial correspondence in relative space regulates serial dependence. Sci Rep 2023; 13:18162. [PMID: 37875592 PMCID: PMC10598270 DOI: 10.1038/s41598-023-45505-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 10/20/2023] [Indexed: 10/26/2023] Open
Abstract
Our perception is often attracted to what we have seen before, a phenomenon called 'serial dependence.' Serial dependence can help maintain a stable perception of the world, given the statistical regularity in the environment. If serial dependence serves this presumed utility, it should be pronounced when consecutive elements share the same identity when multiple elements spatially shift across successive views. However, such preferential serial dependence between identity-matching elements in dynamic situations has never been empirically tested. Here, we hypothesized that serial dependence between consecutive elements is modulated more effectively by the spatial correspondence in relative space than by that in absolute space because spatial correspondence in relative coordinates can warrant identity matching invariantly to changes in absolute coordinates. To test this hypothesis, we developed a task where two targets change positions in unison between successive views. We found that serial dependence was substantially modulated by the correspondence in relative coordinates, but not by that in absolute coordinates. Moreover, such selective modulation by the correspondence in relative space was also observed even for the serial dependence defined by previous non-target elements. Our findings are consistent with the view that serial dependence subserves object-based perceptual stabilization over time in dynamic situations.
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Affiliation(s)
- Jaeseob Lim
- Department of Brain and Cognitive Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Sang-Hun Lee
- Department of Brain and Cognitive Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
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What Simon "knows" about cultural differences: The influence of cultural orientation and traffic directionality on spatial compatibility effects. Mem Cognit 2023; 51:526-542. [PMID: 36180770 PMCID: PMC9992257 DOI: 10.3758/s13421-022-01360-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/11/2022] [Indexed: 11/08/2022]
Abstract
Previous research has suggested that culture influences perception and attention. These studies have typically involved comparisons of Westerners with East Asians, motivated by assumed differences in the cultures' self-concept or position on the individualism-collectivism spectrum. However, other potentially important sources of cultural variance have been neglected, such as differences in traffic directionality shaped by the urban spatial environment (i.e., left-hand vs. right-hand traffic). Thus, existing research may potentially place too much emphasis on self-concepts or the individualism-collectivism dimension in explaining observed cultural differences in cognition. The present study investigated spatial cognition using a Simon task and tested participants from four nations (Australia, China, Germany, and Malaysia) that differ in both cultural orientation (collectivistic vs. individualistic) and traffic directionality (left-hand vs. right-hand traffic). The task used two possible reference frames underlying the Simon effect: a body-centered one based on global stimulus position relative to the screen's center versus an object-centered one based on local stimulus position relative to a context object. As expected, all groups showed a reliable Simon effect for both spatial reference frames. However, the global Simon effect was larger in participants from countries with left-hand traffic. In contrast, the local Simon effect was modulated by differences in cultural orientation, with larger effects in participants from collectivistic cultures. This pattern suggests that both sources of cultural variation, viz. cultural orientation and traffic directionality, contribute to differences in spatial cognition in distinct ways.
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Moore MJ, Vancleef K, Riddoch MJ, Gillebert CR, Demeyere N. Recovery of Visuospatial Neglect Subtypes and Relationship to Functional Outcome Six Months After Stroke. Neurorehabil Neural Repair 2021; 35:823-835. [PMID: 34269128 PMCID: PMC8414826 DOI: 10.1177/15459683211032977] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Background/Objective. This study aims to investigate how complex visuospatial neglect behavioural phenotypes predict long-term outcomes, both in terms of neglect recovery and broader functional outcomes after 6 months post-stroke. Methods. This study presents a secondary cohort study of acute and 6-month follow-up data from 400 stroke survivors who completed the Oxford Cognitive Screen's Cancellation Task. At follow-up, patients also completed the Stroke Impact Scale questionnaire. These data were analysed to identify whether any specific combination of neglect symptoms is more likely to result in long-lasting neglect or higher levels of functional impairment, therefore warranting more targeted rehabilitation. Results. Overall, 98/142 (69%) neglect cases recovered by follow-up, and there was no significant difference in the persistence of egocentric/allocentric (X2 [1] = .66 and P = .418) or left/right neglect (X2 [2] = .781 and P = .677). Egocentric neglect was found to follow a proportional recovery pattern with all patients demonstrating a similar level of improvement over time. Conversely, allocentric neglect followed a non-proportional recovery pattern with chronic neglect patients exhibiting a slower rate of improvement than those who recovered. A multiple regression analysis revealed that the initial severity of acute allocentric, but not egocentric, neglect impairment acted as a significant predictor of poor long-term functional outcomes (F [9,300] = 4.742, P < .001 and adjusted R2 = .098). Conclusions. Our findings call for systematic neuropsychological assessment of both egocentric and allocentric neglect following stroke, as the occurrence and severity of these conditions may help predict recovery outcomes over and above stroke severity alone.
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Affiliation(s)
- Margaret J. Moore
- Department of Experimental Psychology, University of Oxford, Oxford, UK
| | - Kathleen Vancleef
- Department of Experimental Psychology, University of Oxford, Oxford, UK
| | - M. Jane Riddoch
- Department of Experimental Psychology, University of Oxford, Oxford, UK
| | | | - Nele Demeyere
- Department of Experimental Psychology, University of Oxford, Oxford, UK
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Demeyere N, Gillebert CR. Ego- and allocentric visuospatial neglect: Dissociations, prevalence, and laterality in acute stroke. Neuropsychology 2019; 33:490-498. [PMID: 30896236 PMCID: PMC6487998 DOI: 10.1037/neu0000527] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE Visuospatial neglect, whereby patients are unable to attend to stimuli on their contralesional side, is a neuropsychological condition commonly experienced after stroke. We aimed to investigate whether egocentric and allocentric neglect are functionally dissociable and differ in prevalence and laterality in the early poststroke period. METHOD A consecutive sample of 366 acute stroke patients completed the Broken Hearts test from the Oxford Cognitive Screen. We evaluated the association between egocentric and allocentric neglect and contrasted the prevalence and severity of left-sided versus right-sided neglect. RESULTS Clinically, we found a double dissociation between ego- and allocentric neglect, with 50% of the neglect patients showing only egocentric neglect and 25% only allocentric neglect. Left-sided egocentric neglect was more prevalent and more severe than was right-sided egocentric neglect, though right-sided neglect was still highly prevalent in the acute stroke sample (35%). Left-sided allocentric neglect was more severe but not more prevalent than was right-sided allocentric neglect. At 6 months, in a representative subsample of 160 patients, we found neglect recovery rates to be 81% and 74% for egocentric and allocentric neglect, respectively. CONCLUSION Dissociable ego- and allocentric neglect symptoms support a heterogeneous account of visuospatial neglect, which was shown to be highly prevalent for both the left and the right hemifields. (PsycINFO Database Record (c) 2019 APA, all rights reserved).
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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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Cao Z, Wang Y, Zhang L. Real-time Acute Stress Facilitates Allocentric Spatial Processing in a Virtual Fire Disaster. Sci Rep 2017; 7:14616. [PMID: 29097754 PMCID: PMC5668298 DOI: 10.1038/s41598-017-14910-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 10/18/2017] [Indexed: 11/09/2022] Open
Abstract
Prior studies have shown that spatial cognition is influenced by stress prior to task. The current study investigated the effects of real-time acute stress on allocentric and egocentric spatial processing. A virtual reality-based spatial reference rule learning (SRRL) task was designed in which participants were instructed to make a location selection by walking to one of three poles situated around a tower. A selection was reinforced by either an egocentric spatial reference rule (leftmost or rightmost pole relative to participant) or an allocentric spatial reference rule (nearest or farthest pole relative to the tower). In Experiment 1, 32 participants (16 males, 16 females; aged from 18 to 27) performed a SRRL task in a normal virtual reality environment (VRE). The hit rates and rule acquisition revealed no difference between allocentric and egocentric spatial reference rule learning. In Experiment 2, 64 participants (32 males, 34 females; aged from 19 to 30) performed the SRRL task in both a low-stress VRE (a mini virtual arena) and a high-stress VRE (mini virtual arena with a fire disaster). Allocentric references facilitated learning in the high-stressful VRE. The results suggested that acute stress facilitate allocentric spatial processing.
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Affiliation(s)
- Zhengcao Cao
- Beijing Key Laboratory of Learning and Cognition, Department of Psychology, Capital Normal University, Beijing, 100037, China
| | - Yamin Wang
- Beijing Key Laboratory of Learning and Cognition, Department of Psychology, Capital Normal University, Beijing, 100037, China.
| | - Liang Zhang
- State Key Laboratory of Brain and Cognitive Science, Institute of Psychology, Chinese Academy of Sciences, Beijing, 100101, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
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Spatial and non-spatial aspects of visual attention: Interactive cognitive mechanisms and neural underpinnings. Neuropsychologia 2016; 92:1-6. [DOI: 10.1016/j.neuropsychologia.2016.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Turgut N, Miranda M, Kastrup A, Eling P, Hildebrandt H. tDCS combined with optokinetic drift reduces egocentric neglect in severely impaired post-acute patients. Neuropsychol Rehabil 2016; 28:515-526. [DOI: 10.1080/09602011.2016.1202120] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Nergiz Turgut
- Early Neurological Rehabilitation Unit, Klinikum Bremen-Ost, Bremen, Germany
- Department of Psychology, Carl von Ossietzky Universität, Oldenburg, Germany
| | - Marcela Miranda
- Early Neurological Rehabilitation Unit, Evangelisches Krankenhaus, Oldenburg, Germany
| | - Andreas Kastrup
- Early Neurological Rehabilitation Unit, Klinikum Bremen-Ost, Bremen, Germany
| | - Paul Eling
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - Helmut Hildebrandt
- Early Neurological Rehabilitation Unit, Klinikum Bremen-Ost, Bremen, Germany
- Department of Psychology, Carl von Ossietzky Universität, Oldenburg, Germany
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Filimon F. Are All Spatial Reference Frames Egocentric? Reinterpreting Evidence for Allocentric, Object-Centered, or World-Centered Reference Frames. Front Hum Neurosci 2015; 9:648. [PMID: 26696861 PMCID: PMC4673307 DOI: 10.3389/fnhum.2015.00648] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 11/16/2015] [Indexed: 12/19/2022] Open
Abstract
The use and neural representation of egocentric spatial reference frames is well-documented. In contrast, whether the brain represents spatial relationships between objects in allocentric, object-centered, or world-centered coordinates is debated. Here, I review behavioral, neuropsychological, neurophysiological (neuronal recording), and neuroimaging evidence for and against allocentric, object-centered, or world-centered spatial reference frames. Based on theoretical considerations, simulations, and empirical findings from spatial navigation, spatial judgments, and goal-directed movements, I suggest that all spatial representations may in fact be dependent on egocentric reference frames.
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Affiliation(s)
- Flavia Filimon
- Adaptive Behavior and Cognition, Max Planck Institute for Human Development Berlin, Germany ; Berlin School of Mind and Brain, Humboldt Universität zu Berlin Berlin, Germany
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Paschke K, Kagan I, Wüstenberg T, Bähr M, Wilke M. Trunk rotation affects temporal order judgments with direct saccades: Influence of handedness. Neuropsychologia 2015; 79:123-37. [PMID: 26518506 DOI: 10.1016/j.neuropsychologia.2015.10.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 07/21/2015] [Accepted: 10/25/2015] [Indexed: 10/22/2022]
Abstract
Manipulation of the trunk midline has been shown to improve visuospatial performance in patients with unilateral visual neglect. The goal of the present study was to disentangle motor and perceptual components of egocentric midline manipulations and to investigate the contribution of individual hand preference. Two versions of visual temporal order judgment (TOJ) tasks were tested in healthy right- and left-handed subjects while trunk rotation was varied. In the congruent version, subjects were required to execute a saccade to the first of two horizontal stimuli presented with different stimulus onset asynchronies (SOA). In the incongruent version, subjects were required to perform a vertical saccade to a pre-learned color target, thereby dissociating motor response from the perceptual stimulus location. The main findings of this study are a trunk rotation and response direction specific impact on temporal judgments in form of a prior entry bias for right hemifield stimuli during rightward trunk rotation, but only in the congruent task. This trunk rotation-induced spatial bias was most pronounced in left-handed participants but had the same sign in the right-handed group. Results suggest that egocentric midline shifts in healthy subjects induce a spatially-specific motor, but not a perceptual, bias and underline the importance of taking individual differences in functional laterality such as handedness and mode of perceptual report into account when evaluating effects of trunk rotation in either healthy subjects or neurological patients.
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Affiliation(s)
- Kerstin Paschke
- Department of Cognitive Neurology, University Medicine Goettingen, Robert-Koch-Str. 40, 37075 Goettingen, Germany; Department of Neurology, University Medicine Goettingen, Robert-Koch-Str. 40, 37075 Goettingen, Germany; Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, Josef-Schneider-Str. 2, 97080 Würzburg, Germany; Department of Child and Adolescent Psychiatry, University Medicine Goettingen, von-Siebold-Str. 5, 37075 Goettingen, Germany
| | - Igor Kagan
- Department of Cognitive Neurology, University Medicine Goettingen, Robert-Koch-Str. 40, 37075 Goettingen, Germany; German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, 37077 Goettingen, Germany
| | - Torsten Wüstenberg
- Department of Psychiatry and Psychotherapy, Charité-University Medicine Berlin, Campus Mitte, Charitéplatz 1, 10117 Berlin, Germany
| | - Mathias Bähr
- Department of Neurology, University Medicine Goettingen, Robert-Koch-Str. 40, 37075 Goettingen, Germany; DFG Center for Nanoscale Microscopy & Molecular Physiology of the Brain (CNMPB), Germany
| | - Melanie Wilke
- Department of Cognitive Neurology, University Medicine Goettingen, Robert-Koch-Str. 40, 37075 Goettingen, Germany; German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, 37077 Goettingen, Germany; DFG Center for Nanoscale Microscopy & Molecular Physiology of the Brain (CNMPB), Germany.
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Abstract
Spatial priority maps are real-time representations of the behavioral salience of locations in the visual field, resulting from the combined influence of stimulus driven activity and top-down signals related to the current goals of the individual. They arbitrate which of a number of (potential) targets in the visual scene will win the competition for attentional resources. As a result, deployment of visual attention to a specific spatial location is determined by the current peak of activation (corresponding to the highest behavioral salience) across the map. Here we report a behavioral study performed on healthy human volunteers, where we demonstrate that spatial priority maps can be shaped via reward-based learning, reflecting long-lasting alterations (biases) in the behavioral salience of specific spatial locations. These biases exert an especially strong influence on performance under conditions where multiple potential targets compete for selection, conferring competitive advantage to targets presented in spatial locations associated with greater reward during learning relative to targets presented in locations associated with lesser reward. Such acquired biases of spatial attention are persistent, are nonstrategic in nature, and generalize across stimuli and task contexts. These results suggest that reward-based attentional learning can induce plastic changes in spatial priority maps, endowing these representations with the "intelligent" capacity to learn from experience.
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