Long-Term Stable Control of Motor-Imagery BCI by a Locked-In User Through Adaptive Assistance

Performance variation is one of the main challenges that BCIs are confronted with, when being used over extended periods of time. Shared control techniques could partially cope with such a problem. In this paper, we propose a taxonomy of shared control approaches used for BCIs and we review some of the recent studies at the light of these approaches. We posit that the level of assistance provided to the BCI user should be adjusted in real time in order to enhance BCI reliability over time. This approach has not been extensively studied in the recent literature on BCIs. In addition, we investigate the effectiveness of providing online adaptive assistance in a motor-imagery BCI for a tetraplegic end-user with an incomplete locked-in syndrome in a longitudinal study lasting 11 months. First, we report a reliable estimation of the BCI performance (in terms of command delivery time) using only a window of 1 s in the beginning of trials (AUC $approx 0.8$ ). Second, we demonstrate how adaptive shared control can exploit the output of the performance estimator to adjust online the level of assistance in a BCI game by regulating its speed. In particular, online adaptive assistance was superior to a fixed condition in terms of success rate ( ${p}
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - Category: Neuroscience Source Type: research

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CONCLUSION: The interest in BCI and views on ethical issues raised by BCI is moderated by the experience of living with ALS. The findings from this study can help guide the development of implantable BCI technology for persons with ALS. Implications for rehabilitation Loved ones will play crucial roles in helping patients think through the possible benefits and burdens of getting a BCI device. Providers should consider how the ideal timing for getting an implantable BCI device will vary based on the priorities of persons with ALS and their disease stage. Concerns about social stigma, burden of adjustment, and the desire to...
Source: Disability and Rehabilitation. Assistive Technology. - Category: Rehabilitation Authors: Tags: Disabil Rehabil Assist Technol Source Type: research
Conclusions: This case illustrates the importance of careful evaluation and high clinical suspicion for this entity when dealing with patients with new-onset headache or stroke associated with visual impairment. Proper ophthalmologic evaluation is important so that adequate therapy is established.
Source: The Neurologist - Category: Neurology Tags: Case Report/Case Series Source Type: research
Conclusions Though it is not without inherent challenges, fNIRS may have advantages over other neuroimaging techniques in the areas of speech and language impairment. fNIRS has clinical applications that may lead to improved early and differential diagnosis, increase our understanding of response to treatment, improve neuroprosthetic functioning, and advance neurofeedback. PMID: 32640168 [PubMed - as supplied by publisher]
Source: American Journal of Speech-Language Pathology - Category: Speech-Language Pathology Authors: Tags: Am J Speech Lang Pathol Source Type: research
Source: Journal of Neurology - Category: Neurology Source Type: research
Publication date: April 2020Source: Biomedical Signal Processing and Control, Volume 58Author(s): Santosh Thakur, Ramesh Dharavath, Damodar Reddy EdlaAbstractBrain computer interface (BCI) provides communication between the computer and the brain. It is the combination of hardware and software which provides non-muscular channel to send the various messages to control the computer. BCI is useful in various medical applications such as patients with neuromuscular injuries, locked-in syndrome (LiS) etc. BCI is not only useful in medical applications, but also useful in lie detection, entertainment, etc. In this paper, spark ...
Source: Biomedical Signal Processing and Control - Category: Biomedical Science Source Type: research
We report a young woman with a life-threatening basilar artery thrombosis during sexual intercourse, with a resulting locked-in syndrome. The positive high intensity transient signals (HITS) diagnosis showed a right-to-left shunt and is in line with paradoxic embolism. The molecular genetics revealed a homozygosity 4G/4G in the region PAI1, -675 (promoter polymorphism) as a risk factor for ischemic stroke. Sexual intercourse is a possible, albeit unusual stroke cause, especially in young people.
Source: Journal of Clinical Neuroscience - Category: Neuroscience Source Type: research
This study demonstrates that body part-specific somatosensory imagery differentially activates somatosensory cortex in a topographically specific manner; evidence which was surprisingly still lacking in the literature. It also offers proof of concept for a novel somatosensory imagery-based fMRI-BCI control strategy, with particularly high potential for visually and motor-impaired patients. The strategy could also be transferred to lower MRI field strengths and to mobile functional near-infrared spectroscopy. Finally, given that communication BCIs provide the BCI user with a form of feedback based on their brain signals and...
Source: Frontiers in Human Neuroscience - Category: Neuroscience Source Type: research
The unidentified patient, from Maryland, suffered a rare but devastating brain-stem stroke which paralysed her from head-to-toe. She was diagnosed with locked-in syndrome.
Source: the Mail online | Health - Category: Consumer Health News Source Type: news
ConclusionOur patient developed locked-in syndrome after use of cocaine. Given the prevalence of its use in the United States, cocaine use should be included among the potential causes of locked-in syndrome.
Source: Journal of Medical Case Reports - Category: General Medicine Source Type: research
Publication date: Available online 16 November 2019Source: Brain StimulationAuthor(s): Takeshi Satow, Taro Komuro, Takuya Yamaguchi, Nobuhiko Tanabe, Tatsuya Mima
Source: Brain Stimulation - Category: Neurology Source Type: research
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