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This paper aims to improve tactile and bone-conduction brain computer interface (tbaBCI) classification accuracy based on a new stimulus pattern search in order to trigger more separable P300 responses. We propose and investigate three approaches to stimulus spatial and frequency content modification. As result of the online tbaBCI classification accuracy tests with six subjects we conclude that frequency...
Attention is amongst the high level cognitive task which is associated with complex process in the brain. But in almost all researches, this process is associated with a secondary task, (like numeration). Some believe that the link between these two cognitive activities (i.e. attention and numeration) in human brain is very close and intricate. However, the goal of this research is to evaluate the...
Attention is currently being paid to the saccade-related electroencephalogram (saccadic EEG) signal to investigate the brain function in saccadic eye movement. The saccadic EEG has researched to achieve a brain computer interface (BCI) based on intention to eye movement. The spike EEG just before eye movements has been confirmed as the characteristic of saccadic EEG. However, other features have not...
Subretinal devices have been applied to a number of patients. This paper gives an overview of the technological background of the devices and details the most recent clinical results.
In this study, a novel P300 based brain-computer interface (BCI) system using random set presentation pattern and employing the effect of face familiarity has been proposed and developed. While the effect of face familiarity is widely studied in the cognitive neurosciences, it has so far not been addressed for the purpose of BCI. We compare P300-based BCI performances of a conventional row-column...
The authors measured electroencephalograms (EEGs) from subjects looking at line drawings of body parts and recalling their names silently. The equivalent current dipole source localization (ECDL) method is applied to the event related potentials (ERPs): summed EEGs. ECDs are localized to the primary visual area VI, to the ventral pathway (ITG: Inferior Temporal Gyrus), to the parahippocampus (ParaHip),...
Blindness is the most serious ailment that people suffer. The main motive to build Bionic eye is to copy human eye neural circuit, it aims at restoring the lookout vision to people living with blindness and low vision‥
The aim of this study is to provide a comprehensive test of head related impulse response (HRIR) for an auditory spatial speller brain-computer interface (BCI) paradigm. The study is conducted with six users in an experimental set up based on five Japanese hiragana vowels. Auditory evoked potentials resulted with encouragingly good and stable "aha-" or P300-responses in real-world online...
This report presents on studying of two kinds of underwater shock waves generate by a compact generator using underwater pulsed electric discharges in saline water and their medical application. The water used in this study is aqueous solutions of sodium chloride which is substitute for application to human tissue, while underwater shock waves can propagate in the tissue with low reflection between...
In this paper, we experimentally evaluate three different averaging methods for processing of electroencephalogram (EEG) event related potentials (ERPs) measured from scalp in response to repeated stimulus. In ERP applications, arithmetic mean (AM) is normally employed in processing the ERPs prior to ERP detection, whereas also other averaging methods might have beneficial properties. Fast ERP detection...
This paper investigates the differences between encoding and retrieval of Japanese kanji and kana during the memory processing, by comparing the event-related potentials (ERPs) components which are elicited by Japanese kanji and kana during Chinese Japanese learners' memorizing and recollecting them. At the study step, significant differences are found in considering the amplitude and latency of the...
It was previously shown that beta oscillations of local field potentials in the arm area of the primary motor cortex (MI) of nonhuman primates propagate as travelling waves across MI of monkeys during movement preparation and execution and are believed to subserve cortical information transfer. To investigate the information transfer and its change over time at the single-cell level, we analyzed simultaneously...
It has been reported that if two sensory stimuli are presented consecutively with stimulus onset asynchrony (SOA) of as short as several hundreds of milliseconds, the neural activity, elicited by the second stimulus, in the stimulus-sensitive area will be inhibited, say, suppressive phenomenon. Using a paired-stimulus paradigm, in which two visual stimuli were successively presented, we investigated...
We applied behavioral and event-related potential (ERP) measures to study the multisensory interactions of audiovisual stimuli presented at different locations in an auditory-attention task in which an irrelevant visual stimulus occasionally accompanied the auditory stimulus. A stream of visual (V), auditory (A), spatially congruent audiovisual (AVCon), and spatially incongruent audiovisual (AVInc)...
The influence of spatial congruency on audiovisual interaction in a visual-attention task in which only the visual segment of a bimodal audiovisual stimulus was required to attend was investigated using behavioral and electrophysiological measures in humans. The behavioral results showed that the responses to audiovisual target stimuli were faster than that to unimodal visual target stimuli. Moreover,...
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