Characteristics of event-related potentials in response to symbolical and alphabetical stimulation matrices used in a P300-based brain-computer interface

Saltykov, K. A.; Bark, E. D.; Koulikov, Mikhail

doi:10.1134/s0362119714030141

Cited by 2 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar results were received while studying the visual EP registered for the letter-based (verbal) and symbol-based (pictograms, i.e. images) stimuli [4]. In this study, 7 subjects out of 9 showed higher amplitudes for the later components (P3 and N4) while being presented symbol matrices rather than the letter.…”

Section: Discussionsupporting

confidence: 83%

“…Forming mental representations begins with the process of perception, which is being explored in a vast variety of experimental studies. As a rule, those involve the evoked and event-related potentials' method [1][2][3][4][5]. Alongside it, other methods are used, such as calculating the dipole source localization method [6,7], FMRI [8][9][10] and others.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Specific Features of Perception of Semantically Equivalent Stimuli in the Verbal and Visual Form

Kiroy¹

2018

AAP

View full text Add to dashboard Cite

Response time and evoked potentials were registered for visual images related to two categories fruit and tableware as well as their verbal representations. The stimuli were presented randomly. The subjects were to attribute them regardless of the form (a word or image) to one of the categories. 11 female and 10 male subjects (average age 21.9±2.9 years) participated in the tests. 6 components of the evoked potentials were singled out: Р1 (Р66), N1 (N124), Р2 (Р180), N2 (N248), Р3 (Р331) and N3 (N456). Analysis showed that both female and male subjects demonstrated reliably longer response time for words as compared to those for corresponding images. For words, evoked potentials were registered in more complex configurations and with a shorter latency period for the early components (P1, N1) and longer latency period for the late ones (P2, N2, P3, N3). The evoked potential amplitude in response to verbal stimuli was smaller than that for visual ones. Evoked potential components in response to target stimuli (both images and words) had, in general, shorter latency. The amplitude of N1, Р2 and N2 components was lower, while that of P3 and N3 was higher for target stimuli rather than a non-target. The obtained results allow us to assume that evaluation of the type of information (verbal or visual) can be performed on early stages of stimulus perception (up to 120-150 ms). Further analysis includes either more detailed description of spatial features of the visual stimuli in parietal and occipital lobes or estimation of the semantics of a word employing the frontal and temporal areas. Decision-making on formulating a response barely depends on the manner of information presentation (visual and verbal).

show abstract

Section: Discussionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Specific Features of Perception of Semantically Equivalent Stimuli in the Verbal and Visual Form

Kiroy¹

2018

AAP

View full text Add to dashboard Cite

show abstract

“…When designing assistive devices, cognitive load can be alleviated by reducing memory loads and distractions and providing information in more intuitive forms [48]. Modifications to BCI systems have been attempted using rapid serial visual presentation stimuli and language prediction models [49], as well as using symbols representing common daily activities [50]. Similar modifications will need to be tested for the potential to improve communication for ALS patients with reduced cognitive capacity.…”

Section: Discussionmentioning

confidence: 99%

Performance predictors of brain–computer interfaces in patients with amyotrophic lateral sclerosis

2016

View full text Add to dashboard Cite

show abstract

Characteristics of event-related potentials in response to symbolical and alphabetical stimulation matrices used in a P300-based brain-computer interface

Cited by 2 publications

References 18 publications

Specific Features of Perception of Semantically Equivalent Stimuli in the Verbal and Visual Form

Specific Features of Perception of Semantically Equivalent Stimuli in the Verbal and Visual Form

Performance predictors of brain–computer interfaces in patients with amyotrophic lateral sclerosis

Contact Info

Product

Resources

About