A preliminary study of clinical assessment of left unilateral spatial neglect using a head mounted display system (HMD) in rehabilitation engineering technology

Tanaka, Toshiaki; Sugihara, Shunichi; Nara, Hiroyuki; Ino, Shuichi; Ifukube, Tohru

doi:10.1186/1743-0003-2-31

Cited by 32 publications

(11 citation statements)

References 27 publications

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“…The finding that RH patients missed significantly more left targets than the controls in the large-screen tasks but not in the Bells Test was in line with various previous studies comparing new computerized visuospatial and traditional tests (Deouell et al, 2005;Kim et al, 2010;Tanaka et al, 2005;Ulm et al, 2013;van Kessel et al, 2010). Hence, an absence of symptoms in simpler test environments is not necessarily consistent with observations in more complex ones (Blini et al, 2016;Bonato, 2015;Bonato et al, 2010Bonato et al, , 2012Hasegawa et al, 2011).…”

Section: Discussionsupporting

confidence: 87%

“…Variations in task complexity hinder the use of compensatory strategies, and reaction time measurements enhance precision (Bonato & Deouell, 2013). Traditional tests do not reach similar sensitivity (Deouell et al, 2005;Kim et al, 2010;Tanaka, Sugihara, Nara, Ino, & Ifukube, 2005;Tsirlin, Dupierrix, Chokron, Coquillart, & Ohlmann, 2009;Ulm et al, 2013;van Kessel et al, 2010van Kessel et al, , 2013 even if factors increasing discernment are introduced (Bonato et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Various studies have compared new assessment methods with traditional tests (e.g. Deouell et al, 2005;Kim et al, 2010;Tanaka et al, 2005;Ulm et al, 2013;van Kessel et al, 2010), and computerized dual-tasks with single tasks (Andres et al, 2019;Blini et al, 2016;Bonato, 2015;Bonato et al, 2010Bonato et al, , 2012van Kessel et al 2013). However, to our knowledge, there is only limited research comparing different computerized dual-tasks.…”

Section: Introductionmentioning

confidence: 99%

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Dual-Task in Large Perceptual Space Reveals Subclinical Hemispatial Neglect

Villarreal

Linnavuo

Sepponen

et al. 2020

J Int Neuropsychol Soc

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Objective: Both clinically observable and subclinical hemispatial neglect are related to functional disability. The aim of the present study was to examine whether increasing task complexity improves sensitivity in assessment and whether it enables the identification of subclinical neglect. Method: We developed and compared two computerized dual-tasks, a simpler and a more complex one, and presented them on a large, 173 × 277 cm screen. Participants in the study included 40 patients with unilateral stroke in either the left hemisphere (LH patient group, n = 20) or the right hemisphere (RH patient group, n = 20) and 20 healthy controls. In addition to the large-screen tasks, all participants underwent a comprehensive neuropsychological assessment. The Bells Test was used as a traditional paper-and-pencil cancellation test to assess neglect. Results: RH patients made significantly more left hemifield omission errors than controls in both large-screen tasks. LH patients’ omissions did not differ significantly from those of the controls in either large-screen task. No significant group differences were observed in the Bells Test. All groups’ reaction times were significantly slower in the more complex large-screen task compared to the simpler one. The more complex large-screen task also produced significantly slower reactions to stimuli in the left than in the right hemifield in all groups. Conclusions: The present results suggest that dual-tasks presented on a large screen sensitively reveal subclinical neglect in stroke. New, sensitive, and ecologically valid methods are needed to evaluate subclinical neglect.

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Section: Discussionsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dual-Task in Large Perceptual Space Reveals Subclinical Hemispatial Neglect

Villarreal

Linnavuo

Sepponen

et al. 2020

J Int Neuropsychol Soc

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“…They found a higher sensitivity for the VR-based assessment method for polar target arrays compared to linear arrays and paper-pencil tasks. Besides these examples, other studies also showed a higher sensitivity of computerized neglect assessment (Tanaka et al, 2005;Broeren et al, 2007;Aravind et al, 2015). Detailed information regarding these studies is summarized in the review by Ogourtsova et al (2017).…”

Section: Introductionmentioning

confidence: 96%

Immersive 3D Virtual Reality Cancellation Task for Visual Neglect Assessment: A Pilot Study

Knobel

Kaufmann

Gerber

et al. 2020

Front. Hum. Neurosci.

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Background: Unilateral spatial neglect is an attention disorder frequently occurring after a right-hemispheric stroke. Neglect results in a reduction in quality of life and performance in activities of daily living. With current technical improvements in virtual reality (VR) technology, training with stereoscopic head-mounted displays (HMD) has become a promising new approach for the assessment and the rehabilitation of neglect. The focus of this pilot study was to develop and evaluate a simple visual search task in VR for HMD. The VR system was tested regarding feasibility, acceptance, and potential adverse effects in healthy controls and right-hemispheric stroke patients with and without neglect. Methods: The VR system consisted of two main components, a head-mounted display to present the virtual environment, and a hand-held controller for the interaction with the latter. The task followed the rationale of diagnostic paper-pencil cancellation tasks; i.e., the participants were asked to search targets among distractors. However, instead of a two-dimensional setup, the targets and distractors were arranged in three dimensions, in a sphere around the subject inside its field of view. Usability and acceptance of the task, as well as the performance in the latter, were tested in 15 right-hemispheric subacute stroke patients (10 of whom with and five of whom without unilateral spatial neglect; mean age: 67.1 ± 10.5 years) and 35 age-matched healthy controls. Results: System usability and acceptance were rated as high both in stroke patients and healthy controls, close to the maximum score of the questionnaire scale. No relevant adverse effects occurred. There was a high correlation (r = 0.854, p = 0.002) between the Center of Cancellation [an objective neglect measure) calculated from a paperpencil cancellation task (Sensitive Neglect Test (SNT)] and the newly developed VR cancellation task. Conclusion: Overall, the developed visual search task in the tested VR system is feasible, well-accepted, enjoyable, and does not evoke any significant negative effects, both for

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“…The aim of this study was to evaluate a new head mounted display (HMD) system that has been devised for quantitatively assessing the visual recognition of patients with cerebrovascular diseases 18 , 19 ) . USN symptoms not disclosed by the ordinary line cancellation test were found by the HMD system.…”

Section: Introductionmentioning

confidence: 99%

Assessment of visual space recognition of patients with unilateral spatial neglect and visual field defects using a head mounted display system

et al. 2016

Self Cite

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[Purpose] The purpose of this study was the development of a method for presenting diverse visual information and assessing visual space recognition using a new head mounted display (HMD) system. [Subjects] Eight patients: four with unilateral spatial neglect (USN) and four with visual field defects (VFD). [Methods] A test sheet was placed on a desk, and its image was projected on the display of the HMD. Then, space recognition assessment was conducted using a cancellation test and motion analysis of the eyeballs and head under four conditions with images reduced in size and shifted. [Results] Leftward visual search was dominant in VFD patients, while rightward visual search was dominant in USN patients. The angular velocity of leftward eye movement during visual search of the right sheet decreased in both patient types. Motion analysis revealed a tendency of VFD patients to rotate the head in the affected direction under the left reduction condition, whereas USN patients rotated it in the opposite direction of the neglect. [Conclusion] A new HMD system was developed for presenting diverse visual information and assessing visual space recognition which identified the differences in the disturbance of visual space recognition of VFD and USN patients were indicated.

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A preliminary study of clinical assessment of left unilateral spatial neglect using a head mounted display system (HMD) in rehabilitation engineering technology

Cited by 32 publications

References 27 publications

Dual-Task in Large Perceptual Space Reveals Subclinical Hemispatial Neglect

Dual-Task in Large Perceptual Space Reveals Subclinical Hemispatial Neglect

Immersive 3D Virtual Reality Cancellation Task for Visual Neglect Assessment: A Pilot Study

Assessment of visual space recognition of patients with unilateral spatial neglect and visual field defects using a head mounted display system

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