Evaluation of the visual function of patients with locked-in syndrome: Report of 13 cases

Gräber, Martin; Challe, Georges; Alexandre, M. F.; Bodaghi, Bahram; LeHoang, Phuc

doi:10.1016/j.jfo.2016.01.005

Cited by 7 publications

(17 citation statements)

References 8 publications

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“…A study of visual impairments in people with ALS found that these individuals demonstrated reduced visual acuity compared to controls after accounting for age [16]. Assessment of a small sample of individuals with LIS revealed a mean visual acuity (with best correction) of 20/60 [15]. As a point of reference, the International Statistical Classification of Diseases and Related Health Problems (ICD-10) [47] classifies visual acuity of 20/70 or worse as a moderate visual impairment.…”

Section: Visual Acuitymentioning

confidence: 99%

“…Loss of visual fixation is often associated with nystagmus, a condition involving involuntary, rhythmically oscillating eye movements that typically occurs as a result of diseases of the central nervous system [45]. Nystagmus can contribute to blurred vision, nausea, and visual confusion [48] and has been observed in individuals with LIS [15] and ALS [55] and in children with cerebral palsy [50]. The presence of nystagmus may reduce a BCI user's ability to adequately fixate on a target for adequate calibration, or may reduce visual acuity when discriminating among multiple stimuli on a computer interface.…”

Section: Visual Fixationmentioning

confidence: 99%

“…Both miosis and mydriasis can occur as side effects of medications often administered to those with SSPI, such as muscle relaxants or narcotics [56]. Graber and colleagues [15] observed an abnormal pupillary response in 22% of their sample of individuals with LIS. This inability to regulate the amount of light which enters the eye due to abnormal pupillary function may decrease tolerance for varying degrees of luminance emitted by flashing on-screen stimuli or LED lights.…”

Section: Pupillary Functionmentioning

confidence: 99%

“…Visual skills, particularly the ability to see, focus on, and distinguish among stimuli, are essential to ensure that users are receiving the expected inputs from a visual BCI, and are thus able to produce useful outputs. Many potential BCI users with SSPI present with concomitant visual impairments, eye movement disorders, or eye diseases [14][15][16], which may affect these important visual skills and thus the ability to use a visual BCI.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Human visual skills for brain-computer interface use: a tutorial

Fried-Oken

Kinsella

Peters

et al. 2020

Disability and Rehabilitation: Assistive Technology

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Section: Visual Acuitymentioning

confidence: 99%

Section: Visual Fixationmentioning

confidence: 99%

Section: Pupillary Functionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Human visual skills for brain-computer interface use: a tutorial

Fried-Oken

Kinsella

Peters

et al. 2020

Disability and Rehabilitation: Assistive Technology

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“…Visual acuity often decreases with age in the general population, [9] and may be higher among people with LIS. [10,11] Reduced ocular motility, as well as other symptoms including visual fixation impairment, nystagmus, diplopia, and gaze impersistence, have been observed in individuals with LIS [10] and advanced amyotrophic lateral sclerosis (ALS). [12]…”

Section: Introductionmentioning

confidence: 99%

Effects of simulated visual acuity and ocular motility impairments on SSVEP brain-computer interface performance: an experiment with Shuffle Speller

Peters

Higger

Quivira

et al. 2018

Brain-Computer Interfaces

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Individuals with severe speech and physical impairments may have concomitant visual acuity impairments (VAI) or ocular motility impairments (OMI) impacting visual BCI use. We report on the use of the Shuffle Speller typing interface for an SSVEP BCI copy-spelling task under three conditions: simulated VAI, simulated OMI, and unimpaired vision. To mitigate the effect of visual impairments, we introduce a method that adaptively selects a user-specific trial length to maximize expected information transfer rate (ITR); expected ITR is shown to closely approximate the rate of correct letter selections. All participants could type under the unimpaired and simulated VAI conditions, with no significant differences in typing accuracy or speed. Most participants (31 of 37) could not type under the simulated OMI condition; some achieved high accuracy but with slower typing speeds. Reported workload and discomfort were low, and satisfaction high, under the unimpaired and simulated VAI conditions. Implications and future directions to examine effect of visual impairment on BCI use is discussed.

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Workshops of the seventh international brain-computer interface meeting: not getting lost in translation

Huggins

Guger

Aarnoutse

et al. 2019

Brain-Computer Interfaces

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The interactive nature of this conference was embodied by 25 workshops covering topics in BCI (also called brain-machine interface) research. Workshops covered foundational topics such as hardware development and signal analysis algorithms, new and imaginative topics such as BCI for virtual reality and multi-brain BCIs, and translational topics such as clinical applications and ethical assumptions of BCI development. BCI research is expanding in the diversity of applications and populations for whom those applications are being developed. BCI applications are moving toward clinical readiness as researchers struggle with the practical considerations to make sure that BCI translational efforts will be successful. This paper summarizes each workshop, providing an overview of the topic of discussion, references for additional information, and identifying future issues for research and development that resulted from the interactions and discussion at the workshop.

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Evaluation of the visual function of patients with locked-in syndrome: Report of 13 cases

Cited by 7 publications

References 8 publications

Human visual skills for brain-computer interface use: a tutorial

Human visual skills for brain-computer interface use: a tutorial

Effects of simulated visual acuity and ocular motility impairments on SSVEP brain-computer interface performance: an experiment with Shuffle Speller

Workshops of the seventh international brain-computer interface meeting: not getting lost in translation

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