Abstract:
:Over the past few years there has been an increased interest in studying the underlying neural mechanism of attention and cognitive brain activity. This paper aims towards identifying and analyzing distinct responses in an auditory working memory paradigm, as independent components with variable latency, frequency and phase characteristics. The event-related nature of components (either phase or non-phase-locked) over multiple trials is thoroughly examined through intertrial coherence measures. Furthermore, the functional coupling of independent components is investigated through the concept of partial directed coherence depicted as a directed graph. Using these tools, the paper compares issues of activation, connectivity and directionality in the synchronization maps of two populations, of control and Alzheimer's subjects. The results on real data from an oddball experiment verify and further enhance the findings of previous studies and illustrate the potential of the proposed analysis framework.
journal_name
J Neurosci Methodsjournal_title
Journal of neuroscience methodsauthors
Zervakis M,Michalopoulos K,Iordanidou V,Sakkalis Vdoi
10.1016/j.jneumeth.2011.02.001subject
Has Abstractpub_date
2011-04-30 00:00:00pages
302-14issue
2eissn
0165-0270issn
1872-678Xpii
S0165-0270(11)00076-8journal_volume
197pub_type
杂志文章abstract::The relationship between pressure, ejection duration and volume ejected was experimentally determined in vitro for micropipettes with different external tip diameters. The relationship between ejection duration and ejected volume is linear in the steady state (i.e. with ejection durations of 1 s or longer) and at suff...
journal_title:Journal of neuroscience methods
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doi:10.1016/0165-0270(84)90021-9
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abstract::The peptidome encompasses all the peptides present in a particular cell, tissue or organism at a particular point in time. Neuropeptidomics studies the peptidome of the nervous system and will become increasingly important in neuroscience research. Novel peptides can be discovered and, when applied to disease models, ...
journal_title:Journal of neuroscience methods
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doi:10.1016/j.jneumeth.2011.02.023
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abstract::This study demonstrated that liposome-mediated transfection - lipofection - is suitable for delivering genes into astrocytes. By repeatedly lipofecting the same astrocyte cultures, a process we call multi-lipofection, the transfection efficiency of the beta-galactosidase (beta-gal) gene was improved from 2.6+/-0.6 to ...
journal_title:Journal of neuroscience methods
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abstract::A method for quantitative estimation of sensory neuron sensitivity to small sinusoidal stimuli in the presence of sizable background drift (in the stimulus or response) was developed. The performance of the method was tested by analyzing the responses of 17 muscle spindle primary (Ia) afferent neurons to concomitant s...
journal_title:Journal of neuroscience methods
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doi:10.1016/0165-0270(94)90175-9
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abstract::Neuroendocrine cells like chromaffin cells and PC-12 cells are established models for transport, docking and secretion of secretory vesicles. In micrographs, these vesicles are recognized by their electron dense core. The analysis of secretory vesicle distribution is usually performed manually, which is labour-intensi...
journal_title:Journal of neuroscience methods
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doi:10.1016/j.jneumeth.2008.05.022
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abstract::The measurement of amino acid neurotransmitters by high-performance liquid chromatography (HPLC) has emerged as a reliable and sensitive method. This paper describes a method which employs electrochemical (EC) detection of amino acid derivatives formed by a reaction with o-phthalaldehyde (OPA) in the presence of sulph...
journal_title:Journal of neuroscience methods
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abstract:BACKGROUND:Recent research has shown that there is a strong correlation between the functional properties of a neuron and its morphologic structure. Current morphologic analyses typically involve a significant component of computer-assisted manual labor, which is very time-consuming and is susceptible to operator bias....
journal_title:Journal of neuroscience methods
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abstract::We present a high-speed, high-resolution imager of beta particles. It is devoted to be used in autoradiography experiments such as receptor binding or in situ hybridization experiments, either instead of, or in complement with autoradiographic film and emulsions. It allows the user to locate and perform quantitative a...
journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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abstract:BACKGROUND:Functional magnetic resonance imaging (fMRI) enables non-invasive examination of both the structure and the function of the human brain. The prevalence of high spatial-resolution (sub-millimeter) fMRI has triggered new research on the intra-cortex, such as cortical columns and cortical layers. At present, ec...
journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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abstract::One of the core symptoms of anxiety disorders, such as post-traumatic stress disorder, is the failure to overcome feelings of danger despite being in a safe environment. This deficit likely stems from an inability to fully process safety signals, which are cues in the environment that enable healthy individuals to ove...
journal_title:Journal of neuroscience methods
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doi:10.1016/j.jneumeth.2013.01.022
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abstract:BACKGROUND:Electrophysiological recordings contain mixtures of signals from distinct neural sources, impeding a straightforward interpretation of the sensor-level data. This mixing is particularly detrimental when distinct sources resonate in overlapping frequencies. Fortunately, the mixing is linear and instantaneous....
journal_title:Journal of neuroscience methods
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abstract::Many neurophysiological experiments on rodents and non-human primates involve the implantation of more than one multi-electrode array to record from many regions of the brain. So called 'floating' microelectrode arrays are implanted in cortical regions of interest and are coupled via a flexible cable to their connecto...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2010.02.006
更新日期:2010-05-15 00:00:00
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journal_title:Journal of neuroscience methods
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doi:10.1016/j.jneumeth.2017.07.001
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journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/s0165-0270(96)00108-2
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journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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abstract:BACKGROUND:Intracranial electrical recordings (iEEG) and brain stimulation (iEBS) are invaluable human neuroscience methodologies. However, the value of such data is often unrealized as many laboratories lack tools for localizing electrodes relative to anatomy. To remedy this, we have developed a MATLAB toolbox for int...
journal_title:Journal of neuroscience methods
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abstract::A technique has been developed for recording single unit afferent activity from mesenteric nerves in isolated segments of rat distal ileum in vitro. The preparation consists of a 3-cm segment of ileum, containing a single neurovascular bundle, held horizontally in an organ bath. One end of the segment is attached to a...
journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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abstract::Using EEG, ECoG, MEG, and microelectrodes to record brain activity is prone to multiple artifacts. The main power line (mains line), video equipment, mechanical vibrations and activities outside the brain are the most common sources of artifacts. MEG amplitudes are low, and even small artifacts distort recordings. In ...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
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更新日期:2013-07-15 00:00:00