Wyniki wyszukiwania - BazTech

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An empirical survey of electroencephalographybased brain-computer interfaces

Wankhade Megha M., Chorage Suvarna S.

Bio-Algorithms and Med-Systems

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2020

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Vol. 16, no. 4

art. no. 20190053

EN

Objectives: The Electroencephalogram (EEG) signal is modified using the Motor Imagery (MI) and it is utilized for patients with high motor impairments. Hence, the direct relationship between the computer and brain is termed as an EEG-based brain-computer interface (BCI). The objective of this survey is to presents an analysis of the existing distinct BCIs based on EEG. Methods: This survey provides a detailed review of more than 60 research papers presenting the BCI-based EEG, like motor imagery-based techniques, spatial filtering-based techniques, Steady-State Visual Evoked Potential (SSVEP)- based techniques, machine learning-based techniques, Event-Related Potential (ERP)-based techniques, and online EEG-based techniques. Subsequently, the research gaps and issues of several EEG-based BCI systems are adopted to help the researchers for better future scope. Results: An elaborative analyses as well as discussion have been provided by concerning the parameters, like evaluation metrics, year of publication, accuracy, implementation tool, and utilized datasets obtained by various techniques. Conclusions: This survey paper exposes research topics on BCI-based EEG, which helps the researchers and scholars, who are interested in this domain.

2

Sensory processing related to vergence eye movements – an event-related potential study

Przekoracka-Krawczyk A., Wojtczak-Kwaśniewska M., Przekoracka K., Zeri F., Naskręcki R.

Optica Applicata

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2018

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Vol. 48, nr 3

463--475

EN

Vergence eye movements, movements executed in opposite directions, have a crucial role in depth perception and are necessary for maintaining proper binocular vision. Despite these facts, the neurophysiological studies of vergence eye movement on humans are rare and give ambiguous results. In the present study, the sensory event-related potentials (ERPs) related to the processing of stimuli called for convergence, divergence and saccade were explored. Sixteen healthy subjects (mean 23 years old) performed reflexive (visually-guided) eye movements and event-related potentials from 64 active electrodes were recorded. The significant preponderance of cortical activity for convergence among three conditions was revealed and it concerned both anterior (larger negativity) and posterior cortex (larger positivity). Here, we also reported the longest latency for convergence. These results may suggest larger cortical representation for stimuli presented in near visual space, thus the preponderance of near cells within cortex, which respond to cross retinal image disparity being a cue for convergence.

3

Development of the objective method for detection and analysis of disorders in the olfactory event-related potentials

Kotas R., Ciota Z.

International Journal of Microelectronics and Computer Science

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2015

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Vol. 6, nr 1

6--9

EN

This paper presents an objective method for early diagnosis of disorders and diseases of olfactory system. To achieve this goal the author designed a fragrance dosing prototype, which is synchronized with the dedicated recorder of olfactory evoked potentials. Automatic synchronization of registration of olfactory event-related potentials with dosing of stimulus fragrances enables precise determination of latency occurring between stimulation and response of the central nervous system. Obtained results allow to prove that developed prototype enables the evaluation of the olfactory system disorders in the context of neurodegenerative disorders. However it is necessary to establish a standardization procedures, before a wide implementation in a clinical practice. That is why the developed method requires a broader research which is an issue of a much larger group of patients and significantly longer duration of the study.

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Speech perception - toward understanding of consciousness

Trąbka J., Walecki P., Lasoń W., Pyrczak W., Sarapata K.

Bio-Algorithms and Med-Systems

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2009

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Vol. 5, no. 10

45--49

EN

This paper presents a project executing within the framework of COST Action BM0605: Consciousness: A Trans-disciplinary, Integrated Approach. The research is centred on neurophysiological experiments to image brain function in diseases in which the phenomenon of consciousness plays an important role. The fundamental problem studied in this project will be an investigation of the relation between consciousness and speech perception. The study will be conducted using electroencephalographic methods on subjects with Auditory Processing Disorders.