Cognitive training in an everyday-like virtual reality enhances visual-spatial memory capacities in stroke survivors with visual field defects

The use of virtual reality for activities of daily living rehabilitation after brain injury: A scoping review

INTRODUCTION

Individuals with acquired brain injury (ABI) experience high rates of poor functional outcomes such as inability to complete activities of daily living (ADL). Occupational therapy needs to be customised to the individual's function, goals, and environment to facilitate improvement in ADLs after ABI. Virtual reality (VR) is a novel treatment approach that aims to improve skills within an individualised environment. This study aimed to review the current literature for the use of VR platforms that incorporate ADLs to improve functional outcomes after ABI.

METHODS

This review followed the six-stage framework by Arksey & O'Malley (2005). Electronic databases were searched for peer-reviewed journal articles based on inclusion and exclusion criteria.

RESULTS

One thousand and six hundred eighty articles were screened, including 413 full text articles and 13 articles were included for review. Among the 13 articles, six were RCTs and the rest were pre-post intervention studies. Studies largely used non-immersive VR platforms, which incorporated ADLs such as grocery shopping, aiming to improve functional outcomes.

CONSUMER AND COMMUNITY CONSULTATION

Consumer and community were not involved in executing this study.

CONCLUSION

This review suggests mixed results if VR is effective at treating upper limb, cognition, and ADL function after ABI. Using their clinical reasoning, occupational therapists can determine the suitability of VR for ADL rehabilitation for specific patient populations and settings. Plain Language Summary Individuals who sustain an acquired brain injury can have difficulty performing their daily activities such as, making a meal or getting dressed, because of limited function (e.g., physical and cognitive problems). To help improve their ability to complete daily activities, occupational therapy needs to be customised to the individual's function, goals, and environment. Virtual reality is a new rehabilitation approach that allows individuals to improve their function in an individualised environment. In this study, we reviewed the current studies that have used virtual reality platforms that incorporate daily activities to improve function after acquired brain injury. We searched databases and screened the titles and abstracts of 1,680 studies. Then, 413 full-text studies were screened, and 13 studies were included. Studies mostly used non-immersive platforms to practise daily activities such as, grocery shopping, aiming to improve function after acquired brain injury. This review suggests mixed results if virtual reality can effectively treat function after acquired brain injury.

Fractal Phototherapy in Maximizing Retina and Brain Plasticity

The neuroplasticity potential is reduced with aging and impairs during neurodegenerative diseases and brain and visual system injuries. This limits the brain's capacity to repair the structure and dynamics of its activity after lesions. Maximization of neuroplasticity is necessary to provide the maximal CNS response to therapeutic intervention and adaptive reorganization of neuronal networks in patients with degenerative pathology and traumatic injury to restore the functional activity of the brain and retina.Considering the fractal geometry and dynamics of the healthy brain and the loss of fractality in neurodegenerative pathology, we suggest that the application of self-similar visual signals with a fractal temporal structure in the stimulation therapy can reactivate the adaptive neuroplasticity and enhance the effectiveness of neurorehabilitation. This proposition was tested in the recent studies. Patients with glaucoma had a statistically significant positive effect of fractal photic therapy on light sensitivity and the perimetric MD index, which shows that methods of fractal stimulation can be a novel nonpharmacological approach to neuroprotective therapy and neurorehabilitation. In healthy rabbits, it was demonstrated that a long-term course of photostimulation with fractal signals does not harm the electroretinogram (ERG) and retina structure. Rabbits with modeled retinal atrophy showed better dynamics of the ERG restoration during daily stimulation therapy for a week in comparison with the controls. Positive changes in the retinal function can indirectly suggest the activation of its adaptive plasticity and the high potential of stimulation therapy with fractal visual stimuli in a nonpharmacological neurorehabilitation, which requires further study.

Critical quality appraisal and algorithm development of clinical practice guidelines for management of poststroke sensory loss: a systematic review

OBJECTIVES

This study aimed to assess the methodological quality of clinical practice guidelines (CPGs) associated with the management of poststroke sensory loss and develop an algorithm for health professionals.

METHODS

We conducted a systematic review for relevant CPGs published between 2017 and 2022 using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Checklist. Appraisal of Guidelines for Research and Evaluation II instrument was used to assess methodological quality. Recommendations for managing poststroke sensory loss from high and average-quality CPGs were summarised and developed into an algorithm.

RESULTS

First, 1458 records were identified from the database searches and other sources. Finally, four CPGs were included: three were rated as high quality and one as average quality. Twenty-two recommendations were summarised from these CPGs and used to develop a draft algorithm. Then, we revised the draft algorithm developed by the authors based on expert feedback to form the final version.

CONCLUSIONS

The four CPGs included in this study had good quality. Based on these CPGs, we developed an algorithm to facilitate health professionals' adherence to CPGs and contribute to evidence-based medicine. In the future, more high-quality CPGs are required to give further scientific and convincing evidence to manage poststroke sensory loss.

Effects of virtual reality working memory training on event-based prospective memory in patients with major depressive disorder

BACKGROUND

Event-based prospective memory (EBPM) refers to remembering to perform delayed intention when specific events occur. EBPM deficit is present in patients with major depressive disorder (MDD) and hinders recovery from the illness. Working memory training (WMT) has been reported to enhance EBPM but its effect on EBPM in MDD remains unclear. We investigated whether virtual reality (VR)-based WMT can improve EBPM in MDD patients.

METHODS

Forty-six MDD patients and 41 healthy controls (HC) were recruited. Among the former ones, the first 23 consecutive patients were allocated to the experimental group (MDD-VR) and the next 23 consecutive patients to the waitlist control group (MDD-W). EBPM accuracy was used to assess EBPM performance. Hamilton Depression Rating Scale (HDRS) and Massachusetts General Hospital Cognitive and Physical Functioning Questionnaire (CPFQ) were employed to assess the cognitive functions and the depressive symptoms.

RESULTS

At baseline, EBPM accuracy did not significantly differ between MDD-VR and MDD-W but was lower in both of these two groups than in HC (both p < 0.001). Group-by-time interactions on EBPM accuracy (F = 4.614, p = 0.031) and CPFQ score (F = 5.754, p = 0.021) were present, whereas no significant group-by-time interaction or group effects were observed for HDRS score (both p > 0.05). After VR intervention, MDD-VR showed an increase in EBPM accuracy (Cohen's d = 1.20 [95% CI: 0.53, 1.86], p = 0.001).

CONCLUSIONS

Our results demonstrated that VR-based WMT could improve EBPM deficits in MDD patients. Large-scale studies of a VR-based WMT program are indicated.

Audio-visual stimulation for visual compensatory functions in stroke survivors with visual field defect: a systematic review

Background

Hemianopia is a complete or partial blindness in the visual fields of both eyes, commonly caused by cerebral infarction. It has been hypothesized that systematic audio-visual (AV) stimulation of the blind hemifield can improve accuracy and search times, probably due to the stimulation of bimodal representations in the superior colliculus (SC), an important multisensory structure involved in both the initiation and execution of saccades.

Methods

A narrative synthesis of the findings is presented to highlight how AV rehabilitation impacts on patients with hemianopia including visual oculomotor function, functional ability in activities of daily living, hemianopic dyslexia, visual scanning and searching tasks, maintaining of functional ability post training and the effect on brain multisensory integration by using neuroimaging.

Results

Sixteen studies were included (fourteen articles (188 participants) and two literature reviews). Results were grouped into AV training of hemianopia in adults and in children and then further grouped according to the AV task type: tasks measuring the training effects by comparing visual stimulation training to audio-visual training, localization abilities in homonymous hemianopia (HH) and AV integration in patients with HH.

Conclusion

Systematic AV training may improve the processing of visual information by recruiting subcortical pathways, and because most of the patients with visual cortex damage have an intact SC, it might be useful to use the bimodal AV training to activate retinotectal functions. Nevertheless, the underlying mechanisms supporting the reported positive effects are not currently understood. Systematic functional and/or structural imaging studies may help in understanding the underlying mechanism and inform the design of optimal training paradigms.

Supplementary Information

The online version contains supplementary material available at 10.1007/s10072-022-05926-y.

Anxiety and depression in patients with breast cancer undergoing radiotherapy: the role of intelligence, life history, and social support-preliminary results from a monocentric analysis

Purpose

It is known that the diagnosis of breast cancer often causes anxiety and depression. Radiotherapy of the breast as an obligatory part of a breast-conserving treatment concept can markedly increase these psychological symptoms in many, but not all patients. In this clinical observational study, we aimed at identifying cognitive, health-related and social factors that may either enhance or reduce the emergence of anxiety and depression.

Methods

Using a longitudinal study design with 25 women (mean age: 52.9 years; SD = 10.6; age range 29–70 years) with a first diagnosis of nonmetastatic breast cancer, measures of anxiety, depression, situational emotional states, intelligence, and aspects of social frameworks were assessed before, during, and after radiotherapy of the breast. At 4 time-points, standard and self-constructed questionnaires were used to assess the course of anxiety and depressive symptoms across the radiotherapy intervention.

Results

We found that anxiety is highest immediately before the start of radiation therapy, while the anxiety level was lowest on the day that therapy was completed. Anxiety and depression were enhanced in women with a lifetime history of chronic diseases at all time points of measurement. Moreover, women with high intelligence and low social support had stronger symptoms of depression than women with low intelligence and a stable family background at some time points of measurement. The degree of anxiety was neither related to intelligence nor to social support.

Conclusion

For the first time, we demonstrate empirical pilot data on cognitive and social modulators of anxiety and depression in women with breast cancer over the course of radiotherapy. Our results may help to optimize clinical procedures and thereby reduce symptoms of anxiety and depression in these patients.

Supplementary Information

The online version of this article (10.1007/s00066-022-01904-7) contains supplementary material, which is available to authorized users.

Rehabilitation of cortically induced visual field loss

PURPOSE OF REVIEW

Homonymous visual field defects are a common sequela of stroke, and are assumed to be permanent within a few weeks of the event. Because consensus about the efficacy of rehabilitation is lacking, visual therapy is rarely prescribed. Here, we review current rehabilitation options and strategies in the translational pipeline that could change these perspectives.

RECENT FINDINGS

The mainstays of available therapy for homonymous visual defects are compensation training and substitution, which allow patients to better use their spared vision. However, early clinical studies suggest that vision can partially recover following intensive training inside the blind field. Research into the relative efficacy of different restorative approaches continues, providing insights into neurophysiologic substrates of recovery and its limitations. This, in turn, has led to new work examining the possible benefits of earlier intervention, advanced training procedures, noninvasive brain stimulation, and pharmacological adjuvants, all of which remain to be vetted through properly powered, randomized, clinical trials.

SUMMARY

Research has uncovered substantial visual plasticity after occipital strokes, suggesting that rehabilitative strategies for this condition should be more aggressive. For maximal benefit, poststroke vision-restorative interventions should begin early, and in parallel with strategies that optimize everyday use of an expanding field of view.

What is the future for immersive virtual reality in memory rehabilitation? A systematic review

BACKGROUND

A growing interest in non-pharmacological approaches aimed at cognitive rehabilitation and cognitive enhancement pointed towards the application of new technologies. The complex virtual reality (VR) presented using immersive devices has been considered a promising approach.

OBJECTIVE

The article provides a systematic review of studies aimed at the efficacy of VR-based rehabilitation. First, we shortly summarize literature relevant to the role of immersion in memory assessment and rehabilitation.

METHODS

We searched Web of Science, ScienceDirect, and PubMed with the search terms "memory rehabilitation", "virtual reality", "memory deficit". Only original studies investigating the efficacy of complex three-dimensional VR in rehabilitation and reporting specific memory output measures were included.

RESULTS

We identified 412 citations, of which 21 met our inclusion criteria. We calculated appropriate effect sizes for 10 studies including control groups and providing descriptive data. The effect sizes range from large to small, or no effect of memory rehabilitation was present, depending on the control condition applied. Summarized studies with missing control groups point out to potential positive effects of VR but do not allow any generalization.

CONCLUSIONS

Even though there are some theoretical advantages of immersive VE over non-immersive technology, there is not enough evidence yet to draw any conclusions.