نتایج جستجو برای: ssvep
تعداد نتایج: 520 فیلتر نتایج به سال:
Emotionally arousing cues automatically attract attentional resources, which may be at the cost of processing task-related information. Of central importance is how the visual system resolves competition for processing resources among stimuli differing in motivational salience. Here, we assessed the extent and time-course of competition between emotionally arousing distractors and task-related ...
Steady state visual evoked potential (SSVEP)-based brain computer interface (BCI) has advantages of high information transfer rate (ITR), less electrodes and little training. So it has been widely investigated. However, the available stimulus frequencies are limited by brain responses. Simultaneous modulation of stimulus luminance is a novel method to resolve this problem. In this study, three ...
There are several techniques for measuring brain activities such as magnetoencephalogram (MEG), near infrared spectroscopy (NIRS), electrocorticogram (ECoG), functional magnetic resonance imaging (fMRI), and electroencephalography (EEG). Each technique has some advantages and disadvantages compared to other techniques. For example, in EEG the temporal resolution is high but the special resoluti...
Steady-State Visual Evoked Potentials (SSVEPs) are neural oscillations from the parietal and occipital regions of the brain that are evoked from flickering visual stimuli. SSVEPs are robust signals measurable in the electroencephalogram (EEG) and are commonly used in braincomputer interfaces (BCIs). However, methods for high-accuracy decoding of SSVEPs usually require hand-crafted approaches th...
The attentional blink (AB) is a deficit in conscious perception of the second of two targets if it follows the first within 200-500 msec. The AB phenomenon has been linked to pre-target oscillatory alpha activity. However, this is based on paradigms that use a rapid serial visual presentation (RSVP) stimulus stream in which the targets are embedded. This distracter stream is usually presented a...
پتانسیل برانگیختة بینایی حالت دائمی (SSVEP)، بهصورت گسترده در پیادهسازی واسطهای مغز-رایانه استفاده شده است، با اینحال، دستیابی به محرکهای بینایی که پاسخ SSVEP مناسبی را ایجاد کنند و درعینحال به کمترین خستگی چشم منجر شوند، یک چالش تحقیقاتی بهروز است. در این مطالعه، شکل موجهای سینوسی، مربعی، دندانارهای، جمع دو سینوسی، و مدولاسیون فرکانس، با استفاده از یک سختافزار اختصاصی توسط LED و شکل...
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