A Novel Trunk Rehabilitation Robot Based Evaluation of Seated Balance Under Varying Seat Surface and Visual Conditions

Eizad, Amre; Lee, Hosu; Pyo, Sanghun; Afzal, Muhammad Raheel; Lyu, Sung-Ki; Yoon, Jungwon

doi:10.1109/access.2020.3036435

Cited by 8 publications

(10 citation statements)

References 34 publications

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“…In addition, the effect of eye closure was generally nonsignificant between sitting on the same sitting surface in both groups. Although visual input is an important contribution stabilize posture, its role in less challenging tasks or in young populations is less important [ 10 , 20 ]. In addition, our design with the participants seated with both feet on ground also provided a stabilizing effect in the AP direction and likely diminished the destabilizing effect of eye closure [ 34 ].…”

Section: Discussionmentioning

confidence: 99%

“…The above study results support the clinical usefulness of sitting posturographic parameters in the balance assessment among stroke patients. Nonetheless, most of the previous studies used a force platform system to obtain seated posturography, but specific designs usually need to be adapted [ 8 – 10 ], unlike for the evaluation of standing balance. Therefore, they are mostly limited to research settings or fixed locations and are relatively costly.…”

Section: Introductionmentioning

confidence: 99%

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Application of a virtual reality tracker-based system to measure seated postural stability in stroke patients

Liang

Tai

et al. 2022

J NeuroEngineering Rehabil

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Background Postural stability while sitting is an important indicator of balance and an early predictor for future functional improvement in neurorehabilitation, but the evaluation is usually dependent on clinical balance function measures. Meanwhile, instrumental posturography has been used widely to obtain quantitative data and characterize balance abilities and underlying control mechanisms, but not as often for sitting balance. Moreover, traditional kinetic methods using a force platform to test sitting stability often require modification and are costly. We proposed a tracker-based posturography with a commercial virtual reality system, the VIVE Pro system (HTC, Inc. Taiwan), to record the trunk displacement (TD) path with a lumbar tracker for evaluation of sitting stability. The goals were to test the reliability and validity of the TD parameters among stroke patients. Methods Twenty-one stroke individuals and 21 healthy adults had their postural sway measured with this system under four sitting conditions, i.e., sitting on a solid surface or a soft surface, with eyes open or closed. The test–retest reliability of the TD parameters was evaluated with intraclass correlation coefficients in 22 participants. We also tested the discriminative validity of these parameters to discriminate between stroke and healthy controls, and among four sitting conditions. Furthermore, the TD parameters were correlated with the three balance function tests: the Berg Balance Scale (BBS), the Postural Assessment Scale for Stroke Patients (PASS) and the Function in Sitting Test (FIST). Results The results indicated that the TD parameters obtained by tracker-based posturography had mostly moderate to good reliability across the four conditions, with a few exceptions in the solid surface and eyes open tasks. The TD parameters could discriminate the postural stability between sitting on solid and soft surfaces. The stroke group had more seated postural sway than the control group, especially while sitting on a soft surface. In addition, velocity measures in the sagittal and frontal planes had moderate to high correlations with the PASS and BBS scores. Conclusions This tracker-based system is a cost-effective option for the clinical assessment of body stability for stroke patients in a seated position and shows acceptable reliability and validity.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of a virtual reality tracker-based system to measure seated postural stability in stroke patients

Liang

Tai

et al. 2022

J NeuroEngineering Rehabil

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“…With the aim of combining different seated balance rehabilitation tools so that a patient may use the same system that they are familiar with through almost the entirety of the seated rehabilitation process, we have recently devised a trunk rehabilitation robot that can generate static, unstable or forcefully perturbed seating surfaces on demand [23]. The system has been setup for use with two different types of leg supports, as shown in Fig.…”

Section: A Types Of Postural Control and Their Rehabilitationmentioning

confidence: 99%

“…The trunk rehabilitation robot used in this study consists of an instrumented seat surface for measuring the location of the user's center of pressure (COP) mounted on a robot that can move with multiple degrees of freedom [23]. The two rotation movements corresponding to the user's anteroposterior (pitch) and medio-lateral (roll) movements are used to generate the unstable seat condition where an admittance controller running on a PC [24] moves the seat according to the movements of the user's COP, as shown in Fig 2(a).…”

Section: A Experimental Setupmentioning

confidence: 99%

“…During all the trials, the position of the user's COP, trunk tilts, and EMG data of trunk and leg muscles were recorded at 100 Hz, 200 Hz and 2000 Hz, respectively, and the data recording equipment were synchronized using a trigger system (MyoSync, Noraxon, USA). COP position was obtained from the instrumentation built in to the seat [23]. Trunk tilts were measured using inertial measurement units (IMU) (Myomotion, Noraxon, USA) mounted on the subject's trunk at the lower thoracic and pelvic levels.…”

Section: A Experimental Setupmentioning

confidence: 99%

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Study on the Effects of Different Seat and Leg Support Conditions of a Trunk Rehabilitation Robot

Eizad

Lee

Pyo

et al. 2022

IEEE Trans. Neural Syst. Rehabil. Eng.

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Performance of trunk rehabilitation exercises while sitting on movable surfaces with feet on the ground can increase trunk and leg muscle activations, and constraining the feet to move with the seat isolates control of the trunk. However, there are no detailed studies on the effects of these different leg supports on the trunk and leg muscle activations under unstable and forcefully perturbed seating conditions. We have recently devised a trunk rehabilitation robot that can generate unstable and forcefully perturbed sitting surfaces, and can be used with ground-mounted or seat-connected footrests. In this study, we have evaluated the differences in balance performance, trunk movement and muscle activation (trunk and legs) of fourteen healthy adults caused by the use of these different footrest configurations under the different seating scenarios. The center of pressure and trunk movement results show that the seatconnected footrest may be a more suitable choice for use in a balance recovery focused rehabilitation protocol, while the ground-mounted footrest may be a more suitable choice for a trunk movement focused rehabilitation protocol. Although it is difficult to make a clear selection between footrests due to the mixed trends observed in the muscle activation results, it appears that the seat-connected footrest may be preferable for use with the unstable seat as it causes greater muscle activations. Furthermore, the results provide limited evidence that targeting of a particular muscle group may be Manuscript

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A motor learning-based postural intervention with a robotic trunk support trainer to improve functional sitting in spinal cord injury: case report

Santamaria

Agrawal

2022

Spinal Cord Ser Cases

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A Novel Trunk Rehabilitation Robot Based Evaluation of Seated Balance Under Varying Seat Surface and Visual Conditions

Cited by 8 publications

References 34 publications

Application of a virtual reality tracker-based system to measure seated postural stability in stroke patients

Application of a virtual reality tracker-based system to measure seated postural stability in stroke patients

Study on the Effects of Different Seat and Leg Support Conditions of a Trunk Rehabilitation Robot

A motor learning-based postural intervention with a robotic trunk support trainer to improve functional sitting in spinal cord injury: case report

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