scholarly journals Validity and reliability of standing balance control measurement on the left unilateral spatial neglect model

2021 ◽  
Vol 15 (3) ◽  
pp. 167-179
Author(s):  
Abdul C. Meidian ◽  
Song Yige ◽  
Syahmirza I. Lesmana ◽  
Kazu Amimoto
Keyword(s):  
Postural Balance ◽  
Balance Control ◽  
Standing Balance ◽  
Spatial Neglect ◽  
Validity And Reliability ◽  
Control Measurement ◽  
Unilateral Spatial Neglect ◽  
Head Mounted Display ◽  
The Right ◽  
Healthy Participants

BACKGROUND: The present study developed a head-mounted display with the visual direction of a web camera modified to the right as a left unilateral spatial neglect (USN) model with respect to postural balance control. AIM: We aimed to estimate the validity and reliability of center of pressure (CoP) measurements in static standing balance (SSB) and dynamic standing balance (DSB) of healthy participants were using the USN model and to examine whether this model's use influenced postural balance control. METHOD: A portable CoP force plate was used to quantify postural balance control in 64 healthy participants as the model. The CoP displacement of the non-USN and USN models in the medial-lateral (ML) and anterior-posterior (AP) planes, CoP length, and bilateral load ratio in SSB and DSB to the right (R) and left (L) were evaluated. RESULTS: Regression analysis indicated that most CoP measurements have excellent concurrent validity. Bland–Altman plots showed good agreement between the non-USN and USN models in the CoP measurements. Test-retest reliability estimation between two times measurements varied in the frontal and sagittal planes. A Comparison of the results demonstrated that the CoP-AP and CoP length changed (-1.40% and 7.67%, respectively) significantly in SSB (P<0.05). Moreover, the CoP-AP changed very significantly in DSB-R and DSB-L (-1.50% and 1.86%, respectively) in opposite directions (P<0.01) when the subjects performed as the model. CONCLUSION: CoP measurements are valid and reliable to quantify standing balance control in both non-USN and USN models that appear to modulate changes in postural adaptation and adjustment.

The Influence of Profession on Functional Ankle Stability in Musicians

2010 ◽  
Vol 25 (1) ◽  
pp. 22-28 ◽  
Author(s):  
Susanne Rein ◽  
Tobias Fabian ◽  
Hans Zwipp ◽  
Jan Heineck ◽  
Stephan Weindel
Keyword(s):  
Reaction Time ◽  
Ankle Joint ◽  
Postural Balance ◽  
Balance Control ◽  
Ankle Sprains ◽  
Exact Test ◽  
Work Related ◽  
Ankle Stability ◽  
Ankle Joints ◽  
The Right

OBJECTIVE: The aim of this study was to examine the influence of extensive work-related use of the feet on functional ankle stability among musicians. METHODS: Thirty professional organists were compared to professional pianists and controls. All participants completed a questionnaire. Range of motion (ROM), peroneal reaction time, and positional sense tests of the ankle were measured. The postural balance control was investigated with the Biodex Stability System for the stable level 8 and unstable level 2. Statistical analysis was done with the Kruskal-Wallis test, Mann-Whitney test with Bonferroni-Holm correction, and Fisher’s exact test. RESULTS: Nine of 30 organists compared to 5 of 30 pianists and controls reported ankle sprains in their medical history. Pianists had a significant increased flexion of both ankle joints compared to organists (p≤0.01) and increased flexion of the right ankle joint compared to controls (p=0.02). The positional sense test and postural balance control showed no significant differences among groups. The peroneal reaction time of the right peroneus longus muscle was significantly increased in pianists compared to controls (p=0.008). CONCLUSIONS: Organists have shown a high incidence of ankle sprains. Despite their extensive work-related use of the ankle joints, organists have neither increased functional ankle stability nor increased ROM of their ankle joints in comparison to controls. Pianists have increased flexion of the ankle joint, perhaps due to the exclusive motion of extension and flexion while using the pedals. To minimize injuries of the ankle and improve functional ankle stability as well as balance control, proprioceptive exercises of the ankle in daily training programs are recommended.

scholarly journals Clinical application of head mounted display system for left unilateral spatial neglect

2005 ◽  
Vol 41 (4) ◽  
pp. 213-217 ◽  
Author(s):  
Toshiaki TANAKA ◽  
Hiroyuki NARA ◽  
Shuichi INO ◽  
Tohru IFUKUBE
Keyword(s):  
Clinical Application ◽  
Spatial Neglect ◽  
Display System ◽  
Unilateral Spatial Neglect ◽  
Head Mounted Display

scholarly journals A study on the right unilateral spatial neglect in left hemispheric lesions - The difference between right-handed and left-handed post stroke patients.

1990 ◽  
Vol 27 (5) ◽  
pp. 363-373
Author(s):  
Shinichiro MAESHIMA ◽  
Nobuyuki DOHI ◽  
Toshio KAJIWARA ◽  
Yoshimi KONDO ◽  
Etsuko MAESHIMA ◽  
...  
Keyword(s):  
Spatial Neglect ◽  
Stroke Patients ◽  
Unilateral Spatial Neglect ◽  
Post Stroke ◽  
Left Handed ◽  
The Difference ◽  
The Right

scholarly journals Measuring Gaze and Arrow Cuing Effects With a Short Test Adapted to Brain Damaged Patients With Unilateral Spatial Neglect: A Preliminary Study

2021 ◽  
Vol 12 ◽  
Author(s):  
Rindra Narison ◽  
Marie de Montalembert ◽  
Andrew Bayliss ◽  
Laurence Conty
Keyword(s):  
Older Patients ◽  
Brain Lesion ◽  
Brain Lesions ◽  
Spatial Neglect ◽  
Short Version ◽  
Unilateral Spatial Neglect ◽  
Right Brain ◽  
Short Test ◽  
Preliminary Study ◽  
Healthy Participants

People with left unilateral spatial neglect (USN) following a right brain lesion show difficulty in orienting their attention toward stimuli presented on the left. However, cuing the stimuli with gaze direction or a pointing arrow can help some of them to compensate for this difficulty. In order to build a tool that helps to identify these patients, we needed a short version of the paradigm classically used to test gaze and arow cuing effects in healthy adults, adapted to the capacities of patients with severe attention deficit. Here, we tested the robustness of the cuing effects measured by such a short version in 48 young adult healthy participants, 46 older healthy participants, 10 patients with left USN following a right brain lesion (USN+), and 10 patients with right brain lesions but no USN (USN–). We observed gaze and arrow cuing effects in all populations, independently of age and presence or absence of a right brain lesion. In the neglect field, the USN+ group showed event greater cuing effect than older healthy participants and the USN– group. We showed that gaze and arrow cuing effects are powerful enough to be detected in a very short test adapted to the capacities of older patients with severe attention deficits, which increases their applicability in rehabilitation settings. We further concluded that our test is a suitable basis to develop a tool that will help neuropsychologists to identify USN patients who respond to gaze and/or arrow cuing in their neglect field.

Priming of Color and Position during Visual Search in Unilateral Spatial Neglect

2005 ◽  
Vol 17 (6) ◽  
pp. 859-873 ◽  
Author(s):  
Árni Kristjánsson ◽  
Patrik Vuilleumier ◽  
Paresh Malhotra ◽  
Masud Husain ◽  
Jon Driver
Keyword(s):  
Visual Search ◽  
Target Location ◽  
Parietal Lobe ◽  
Spatial Neglect ◽  
Healthy Controls ◽  
Unilateral Spatial Neglect ◽  
Inferior Parietal Lobe ◽  
Color Priming ◽  
The Right ◽  
Singleton Target

We examined priming of visual search by repeated target location or color in two patients with left visual neglect and extinction, following strokes centered on the right inferior parietal lobe. Both patients, like the healthy controls we tested, showed intact priming, with performance speeded when either the location or color of a singleton target was repeated over successive trials in a standard search condition (Experiment 1). This was observed both from and to targets on the contralesional (left) side. Moreover, priming of search was still observed even when a return of fixation back to display-center was required between successive trials (Experiment 2). When briefer displays were used (Experiment 3), the patients often failed to detect left targets. This situation revealed an important dissociation: Whereas location priming only arose from preceding left targets that had been consciously detected, color priming (possibly arising within the intact ventral stream) did not depend on awareness of the preceding target. There was considerable color priming from missed targets. These findings demonstrate relatively intact priming of visual search by color and location in patients with right parietal damage, and also reveal that location priming may differ from color priming in requiring awareness.

scholarly journals Immersive virtual prism adaptation therapy with depth sensing camera: A feasibility study with functional near infrared spectroscopy in healthy adults

2021 ◽  
Author(s):  
Sungmin Cho ◽  
Won-Seok Kim ◽  
Jihong Park ◽  
Seung Hyun Lee ◽  
Jongseung Lee ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Right Hemisphere ◽  
Prism Adaptation ◽  
Spatial Neglect ◽  
Depth Sensing ◽  
Functional Near Infrared Spectroscopy ◽  
Unilateral Spatial Neglect ◽  
The Right

Unilateral spatial neglect (USN) is common after stroke and associated with poor functional recovery. Prism adaptation (PA) is one of the most supported modality able to ameliorate USN but underapplied due to several issues. Using immersive virtual reality and depth-sensing camera, we developed the virtual prism adaptation therapy (VPAT) to overcome the limitations in conventional PA. In this study, we investigated whether VPAT can induce behavioral adaptations and which cortical area is most significantly activated. Fourteen healthy subjects participated in this study. The experiment consisted of four sequential phases (pre-VAPT, VPAT-10°, VPAT-20°, and post-VPAT) with functional near-infrared spectroscopy recordings. Each phase consisted of alternating target pointing and resting (or clicking) blocks. To find out the most significantly activated area during pointing in different phases (VPAT-10°, VPAT-20°, and Post-VPAT) in contrast to pointing during the pre-VPAT phase, we analyzed changes in oxyhemoglobin concentration 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. The most significantly activated channels were all 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. Future clinical trials using multiple sessions of a high degree of rightward deviation VPAT over a more extended period are required in stroke patients with unilateral spatial neglect.

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