Aging Affects the Ability to Process the Optic Flow Stimulations: A Functional Near-Infrared Spectrometry Study

Hinderaker, Mark; Sylcott, Brian; Williams, Keith R.; Lin, Chia-Cheng

doi:10.1080/00222895.2019.1645639

Cited by 10 publications

(9 citation statements)

References 33 publications

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“…Parijat et al ( 2015 ) induced virtual perturbations similar to slip and observed evoked recovery reactions that could be transferred to the actual slip trials. Hinderaker et al ( 2020 ) evaluated the effects of optical flow speed on brain activity and postural control of younger and older adults. They showed that older adults show higher brain activities at lower optical flow speeds as compared to younger adults, but that the optical flow speed did not affect the postural sway in either the younger or older adults.…”

Section: Resultsmentioning

confidence: 99%

The Influence of Virtual Reality Head-Mounted Displays on Balance Outcomes and Training Paradigms: A Systematic Review

Soltani¹,

Andrade²

2021

Front. Sports Act. Living

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Background: Falls are the leading causes of (non)fatal injuries in older adults. Recent research has developed interventions that aim to improve balance in older adults using virtual reality (VR).Purpose: We aimed to investigate the validity, reliability, safety, feasibility, and efficacy of head mounted display (HMD) systems for assessing and training balance in older adults.Methods: We searched EBSCOhost, Scopus, Web of Science, and PubMed databases until 1 September 2020 to find studies that used HMD systems for assessing or training balance. The methodological quality was assessed using a modified version of Downs and Black. We also appraised the risk of bias using Risk of Bias Assessment tool for Non-randomized Studies (RoBANS).Results: A total of 19 articles (637 participants) were included for review. Despite heterogenous age ranges and clinical conditions across studies, VR HMD systems were valid to assess balance and could be useful for fall prevention and for improving postural control and gait patterns. These systems also have the capacity to differentiate healthy and balance-impaired individuals. During VR versions of traditional balance tests, older adults generally acquire a cautious behavior and take more time to complete the tasks.Conclusion: VR HMD systems can offer ecologically valid scenarios to assess and train functional balance and can be used alone or in addition to other interventions. New norms and protocols should be defined according to participants' age, health status, and severity of their illness when using VR HMD systems for balance assessment and training. For safe and feasible training, attention must be given to display type, VR elements and scenarios, duration of exposure, and system usability. Due to high risk of bias and overall poor quality of the studies, further research is needed on the effectiveness of HMD VR training in older adults.

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Section: Resultsmentioning

confidence: 99%

The Influence of Virtual Reality Head-Mounted Displays on Balance Outcomes and Training Paradigms: A Systematic Review

Soltani¹,

Andrade²

2021

Front. Sports Act. Living

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“…In addition, it has been reported that attentional demand increases in SP compared to HA, especially when conditions become more challenging [20]. In a near-infrared spectrometry study, Hinderaker et al [21] showed that attentional cost, illustrated by prefrontal cortex activation modulation, rose in older adults under challenging balance conditions. This process may be exacerbated in SP and could be partially related to postural control alteration in a challenging VR environment.…”

Section: Discussionmentioning

confidence: 99%

Postural Control Disturbances Induced by Virtual Reality in Stroke Patients

et al. 2021

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People who survive a stroke are often left with long-term neurologic deficits that induce, among other impairments, balance disorders. While virtual reality (VR) is growing in popularity for postural control rehabilitation in post-stroke patients, studies on the effect of challenging virtual environments, simulating common daily situations on postural control in post-stroke patients, are scarce. This study is a first step to document the postural response of stroke patients to different challenging virtual environments. Five subacute stroke patients and fifteen age-matched healthy adults were included. All participants underwent posturographic tests in control conditions (open and closed eyes) and virtual environment without (one static condition) and with avatars (four dynamic conditions) using a head-mounted device for VR. In dynamic environments, we modulated the density of the virtual crowd (dense and light crowd) and the avoidance space with the avatars (near or far). Center of pressure velocity was collected by trial throughout randomized 30-s periods. Results showed that more challenging conditions (dynamic condition) induced greater postural disturbances in stroke patients than in healthy counterparts. Our study suggests that virtual reality environments should be adjusted in light of obtaining more or less challenging conditions.

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“…iVR-fNIRS offers a versatile platform to assess balance and related motor functions with either a treadmill 48 or the use of optical flow 33 , 58 [ Fig. 5(a) ].…”

Section: Applications Of Ivr-fnirs In Neuroscience Research and Therapymentioning

confidence: 99%

iVR-fNIRS: studying brain functions in a fully immersive virtual environment

Peng,

Moussavi,

Karunakaran

et al. 2024

Neurophoton.

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. Immersive virtual reality (iVR) employs head-mounted displays or cave-like environments to create a sensory-rich virtual experience that simulates the physical presence of a user in a digital space. The technology holds immense promise in neuroscience research and therapy. In particular, virtual reality (VR) technologies facilitate the development of diverse tasks and scenarios closely mirroring real-life situations to stimulate the brain within a controlled and secure setting. It also offers a cost-effective solution in providing a similar sense of interaction to users when conventional stimulation methods are limited or unfeasible. Although combining iVR with traditional brain imaging techniques may be difficult due to signal interference or instrumental issues, recent work has proposed the use of functional near infrared spectroscopy (fNIRS) in conjunction with iVR for versatile brain stimulation paradigms and flexible examination of brain responses. We present a comprehensive review of current research studies employing an iVR-fNIRS setup, covering device types, stimulation approaches, data analysis methods, and major scientific findings. The literature demonstrates a high potential for iVR-fNIRS to explore various types of cognitive, behavioral, and motor functions in a fully immersive VR (iVR) environment. Such studies should set a foundation for adaptive iVR programs for both training (e.g., in novel environments) and clinical therapeutics (e.g., pain, motor and sensory disorders and other psychiatric conditions).

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Aging Affects the Ability to Process the Optic Flow Stimulations: A Functional Near-Infrared Spectrometry Study

Cited by 10 publications

References 33 publications

The Influence of Virtual Reality Head-Mounted Displays on Balance Outcomes and Training Paradigms: A Systematic Review

The Influence of Virtual Reality Head-Mounted Displays on Balance Outcomes and Training Paradigms: A Systematic Review

Postural Control Disturbances Induced by Virtual Reality in Stroke Patients

iVR-fNIRS: studying brain functions in a fully immersive virtual environment

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