نتایج جستجو برای: alpha band

تعداد نتایج: 332888  

2013
Hironori Nakatani Cees van Leeuwen

Oculomotor events such as blinks and saccades transiently interrupt the visual input and, even though this mostly goes undetected, these brief interruptions could still influence the percept. In particular, both blinking and saccades facilitate switching in ambiguous figures such as the Necker cube. To investigate the neural state antecedent to these oculomotor events during the perception of a...

Delavar Shahbaz-Zadelf, Mostafa Saadat,

The gene encoding alpha fetoprotein (locus symbol Afp) was assigned to rat chromosome 14 at band p21-p22 using fluorescence in situ hybridization method. The present result suggests that there is a conserved syntenic group between human 4q11-q13, mouse 5F-G, and rat 14p21-p22.

Journal: :Biological psychiatry. Cognitive neuroscience and neuroimaging 2017
Avniel Singh Ghuman Rebecca N van den Honert Theodore J Huppert Gregory L Wallace Alex Martin

BACKGROUND Prevailing theories suggest that autism spectrum disorder (ASD) results from impaired brain communication, causing aberrant synchrony among neuronal populations. However, it remains debated whether synchrony abnormalities are among local or long-range circuits, are circuit specific or are generalized, reflect hypersynchrony or reflect hyposynchrony, and are frequency band-specific or...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2000
M S Worden J J Foxe N Wang G V Simpson

Alpha-band (8-14 Hz) oscillatory EEG activity was examined with high-density scalp electrical recording during the cue-stimulus interval of an endogenous spatial cueing paradigm. In different blocks, cued spatial locations (left or right) were in either the upper or lower visual field, and attended stimuli were either oriented Ts or moving dots. Distractor stimuli were equally likely in the unc...

Journal: :Arquivos de neuro-psiquiatria 2011
Renato Anghinah Paulo Afonso Medeiros Kanda Helder Frederico Lopes Luis Fernando Hindi Basile Sérgio Machado Pedro Ribeiro Bruna Velasques Koichi Sameshima Daniel Yasumasa Takahashi Lécio Figueira Pinto Paulo Caramelli Ricardo Nitrini

There is evidence in electroencephalography that alpha, theta and delta band oscillations reflect cognitive and memory performances and that quantitative techniques can improve the electroencephalogram (EEG) sensitivity. This paper presents the results of comparative analysis of qEEG variables as reliable markers for Alzheimer's disease (AD). We compared the sensitivity and specificity between ...

2013
Markus Quirin Thomas Gruber Julius Kuhl Rainer Düsing

Previous research on relationships between affective-motivational traits and hemispheric asymmetries in resting frontal alpha band power as measured by electroencephalography (EEG) focused on individual differences in motivational direction (approach vs. withdrawal) or behavioral activation. The present study investigated resting frontal alpha asymmetries in 72 participants as a function of ind...

Journal: :Investigative ophthalmology & visual science 1996
G B van Setten S Macauley M Humphreys-Beher N Chegini G Schultz

PURPOSE To assess whether the lacrimal gland is a possible site of synthesis of transforming growth factor-alpha (TGF-alpha) and to characterize TGF-alpha biochemically in human tears. METHODS Reverse transcription-polymerase chain reaction (RT-PCR) amplification was used to analyze rat lacrimal glands for the presence of TGF-alpha mRNA. Specific monoclonal antibodies were used to localize TG...

Journal: :International journal of psychophysiology : official journal of the International Organization of Psychophysiology 2011
Rebecca S Schaefer Rutger J Vlek Peter Desain

Previous work has shown that mental imagination of sound generally elicits an increase of alpha band activity (8-12 Hz) in the electroencephalogram (EEG). In addition, alpha activity has been shown to be related to aspects of music processing. In the current study, EEG signatures were investigated for perception and imagery of two different natural musical phrases. The responses are compared be...

Journal: :International journal of psychophysiology : official journal of the International Organization of Psychophysiology 2012
Wenya Nan João Pedro Rodrigues Jiali Ma Xiaoting Qu Feng Wan Pui-In Mak Peng Un Mak Mang I Vai Agostinho Rosa

Memory performance has been reported to be associated with electroencephalogram (EEG) alpha activity. This study aimed to improve short term memory performance by individual alpha neurofeedback training (NFT). With appropriate protocol designed for NFT, the experimental results showed that the participants were able to learn to increase the relative amplitude in individual alpha band during NFT...

Journal: :Journal of cognitive neuroscience 2016
Jason Samaha Thomas Sprague Bradley R. Postle

Many aspects of perception and cognition are supported by activity in neural populations that are tuned to different stimulus features (e.g., orientation, spatial location, color). Goal-directed behavior, such as sustained attention, requires a mechanism for the selective prioritization of contextually appropriate representations. A candidate mechanism of sustained spatial attention is neural a...

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