Effect of viewing angle on arm reaching while standing in a virtual environment: Potential for virtual rehabilitation

Ustinova, Ksenia Ivanovna; Perkins, Janice M; Szostakowski, L.; Tamkei, L.S.; Leonard, W. A.

doi:10.1016/j.actpsy.2009.11.006

Cited by 33 publications

(35 citation statements)

References 41 publications

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“…It gave rise to a significant aftereffect but did not allow the significant decrease in performance variability observed with the other two viewpoints. In that respect, our results contrast recent findings that a top view allows the best performance and is preferred by participants for a reaching task (Ustinova et al 2010). A reason for this discrepancy could lie in the nature of the task used by Ustinova and colleagues.…”

Section: Discussioncontrasting

confidence: 99%

“…Concerning sensorimotor control and learning, most of the studies that investigated the effect of viewpoint are based on the naturalistic first-person view, which is usually preferred for fine manipulation like teleoperation (Macedo et al 1998). However, a recent study by Ustinova et al (2010) suggested that higher viewpoints might actually allow for better motor performance.…”

Section: Introductionmentioning

confidence: 99%

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It is all me: the effect of viewpoint on visual–vestibular recalibration

et al. 2011

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Participants performed a visual-vestibular motor recalibration task in virtual reality. The task consisted of keeping the extended arm and hand stable in space during a whole-body rotation induced by a robotic wheelchair. Performance was first quantified in a pre-test in which no visual feedback was available during the rotation. During the subsequent adaptation phase, optical flow resulting from body rotation was provided. This visual feedback was manipulated to create the illusion of a smaller rotational movement than actually occurred, hereby altering the visual-vestibular mapping. The effects of the adaptation phase on hand stabilization performance were measured during a post-test that was identical to the pre-test. Three different groups of subjects were exposed to different perspectives on the visual scene, i.e., first-person, top view, or mirror view. Sensorimotor adaptation occurred for all three viewpoint conditions, performance in the posttest session showing a marked under-compensation relative to the pre-test performance. In other words, all viewpoints gave rise to a remapping between vestibular input and the motor output required to stabilize the arm. Furthermore, the first-person and mirror view adaptation induced a significant decrease in variability of the stabilization performance. Such variability reduction was not observed for the top view adaptation. These results suggest that even if all three viewpoints can evoke substantial adaptation aftereffects, the more naturalistic first-person view and the richer mirror view should be preferred when reducing motor variability constitutes an important issue.

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Section: Discussioncontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

It is all me: the effect of viewpoint on visual–vestibular recalibration

et al. 2011

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“…One such factor might be viewing angle (Baker, Donoghue, & Sanes, 1999;Ustinova, Perkins, Szostakowski, Tamkei, & Leonard, 2010). The viewing angle differed slightly between the conditions because most subjects leaned forward a bit in the natural conditions, such that their head was not touching the headrest (Figure 1A), while their head rested on the headrest in the tilted conditions.…”

Section: Discussionmentioning

confidence: 97%

Gravity Affects the Vertical Curvature in Human Grasping Movements

Verheij

Brenner

Smeets

2013

Journal of Motor Behavior

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When humans make grasping movements their digits' paths are curved vertically. In a previous study the authors found that this curvature is largely caused by the local constraints at the start and end of the movement. Here the authors examined the contribution of gravity to the part of the curvature that was not explained by the local constraints. Subjects had to grasp a tealight (small cylinder) while sitting on a chair. The authors could rotate the whole setup, including the subject, relative to gravity, whereby the positions of the starting point and of the tealight relative to the subject did not change. They found differences between the paths that are consistent with a direct effect of gravity pulling the arm downward.

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“…Similarly, movements were slower in both groups of subjects when reaching in a 3D VE viewed through an HMD compared to an equivalent PE [11]. Movement parameters can be influenced by object-based visual cues [25] and the size and quality of the viewing environment [26]. Slowing of movement may have been due to viewing the VE through the HMD which reportedly decreases depth perception for distant objects [27].…”

Section: A Effect Of the Environment On Reaching And Graspingmentioning

confidence: 91%

Quality of Grasping and the Role of Haptics in a 3-D Immersive Virtual Reality Environment in Individuals With Stroke

Levin

Magdalon

Michaelsen

et al. 2015

IEEE Trans. Neural Syst. Rehabil. Eng.

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Reaching and grasping parameters with and without haptic feedback were characterized in people with chronic post-stroke behaviors. Twelve (67 ± 10 years) individuals with chronic stroke and arm/hand paresis (Fugl-Meyer Assessment-Arm: ≥ 46/66 pts) participated. Three dimensional (3-D) temporal and spatial kinematics of reaching and grasping movements to three objects (can: cylindrical grasp; screwdriver: power grasp; pen: precision grasp) in a physical environment (PE) with and without additional haptic feedback and a 3-D virtual environment (VE) with haptic feedback were recorded. Participants reached, grasped and transported physical and virtual objects using similar movement strategies in all conditions. Reaches made in VE were less smooth and slower compared to the PE. Arm and trunk kinematics were similar in both environments and glove conditions. For grasping, stroke subjects preserved aperture scaling to object size but used wider hand apertures with longer delays between times to maximal reaching velocity and maximal grasping aperture. Wearing the glove decreased reaching velocity. Our results in a small group of subjects suggest that providing haptic information in the VE did not affect the validity of reaching and grasping movement. Small disparities in movement parameters between environments may be due to differences in perception of object distance in VE. Reach-to-grasp kinematics to smaller objects may be improved by better 3-D rendering. Comparable kinematics between environments and conditions is encouraging for the incorporation of high quality VEs in rehabilitation programs aimed at improving upper limb recovery.

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Effect of viewing angle on arm reaching while standing in a virtual environment: Potential for virtual rehabilitation

Cited by 33 publications

References 41 publications

It is all me: the effect of viewpoint on visual–vestibular recalibration

It is all me: the effect of viewpoint on visual–vestibular recalibration

Gravity Affects the Vertical Curvature in Human Grasping Movements

Quality of Grasping and the Role of Haptics in a 3-D Immersive Virtual Reality Environment in Individuals With Stroke

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