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Welcome to the Pubget Medical Subject Headings (MESH) browser. Click on a topic or subtopic below to explore related papers. In the gold box is the most recent paper about the current MESH term, and below are 20 related papers.
Periodicity (1):
Recent article
Periodicity
Abstract
Cross-channel envelope correlations are hypothesized to influence speech intelligibility, particularly in adverse conditions. Acoustic analyses suggest speech envelope correlations differ for syllabic and phonemic ranges of modulation frequency. The influence of cochlear filtering wa...
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PMID: 21682421
PDF is available here.
PDF is available here.
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Abstract
We consider a particularly simple motif, comprising purely inhibitory interactions, which generates sequential periodic dynamics. We first describe the dynamics of the single motif both for general balanced coupling (all cells receive the same number and strength of inputs) and then for a specific c...
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PMID: 21728578
PDF is available here.
PDF is available here.
Kinderkrankenschwester : Organ der Sektion Kinderkrankenpflege / Deutsche Gesellschaft fur Sozialpadiatrie und Deutsche Gesellschaft fur Kinderheilkunde (30)4 2011
Abstract
Abstract
We consider a coarse-grained neural field model for synaptic activity in spatially extended cortical tissue that possesses an underlying periodicity in its microstructure. The model is written as an integrodifferential equation with periodic modulation of a translationally invariant spatial kernel....
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PMID: 21405718
PDF is available here.
PDF is available here.
Abstract
Multistability of oscillatory and silent regimes is a ubiquitous phenomenon exhibited by excitable systems such as neurons and cardiac cells. Multistability can play functional roles in short-term memory and maintaining posture. It seems to pose an evolutionary advantage for neurons which are part of...
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PMID: 21814554
PDF is available here.
PDF is available here.
Abstract
This review focuses on arborviral infections associated with California serocomplex (Bunyaviridae, Orthobunyavirus). Results of relevant eco-epidemiological and clinical studies in Russia are presented suggesting the ubiquitious nature of diseases caused by viruses of the California encephalitis sero...
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PMID: 21786596
PDF is available here.
PDF is available here.
Abstract
Abstract
Age of gilts at first mating (AFM) is a factor associated with reproductive performance of female pigs. The objectives of the present study were to compare AFM and reproductive performance across parity between three herd groups based on a productivity measurement and to determine lifetime performanc...
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PMID: 21173552
PDF is available here.
PDF is available here.
Abstract
An approach based on combining nonparametric Gaussian process (GP) modeling with certain local topological considerations is presented for prediction (one-step look ahead) of complex physical systems that exhibit nonlinear and nonstationary dynamics. The key idea here is to partition system trajecto...
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PMID: 21230562
PDF is available here.
PDF is available here.
Abstract
This study describes swallow-breath interaction and phase of respiration with swallow during nonnutritive suck (NNS) in low-risk preterm infants. Suckle and swallow, thoracic motion, and airflow were measured in 16 infants during NNS. Logistic regression models were used to describe swallow-breath i...
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PMID: 20607645
PDF is available here.
PDF is available here.
Abstract
We demonstrate that rhythmic activity of this respiratory network is affected by the phosphorylation status of the inhibitory glycine receptor α3 subtype (GlyRα3), which controls glutamatergic and glycinergic neuronal discharges, subject to serotonergic modulation. Serotonin receptor type 1A-speci...
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PMID: 20978350
PDF is available here.
PDF is available here.
Medical Image Analysis (14)5 2010
Abstract
We present a reconstruction method based on a 4D time-continuous B-spline motion field. The temporal component of the motion field is parameterized by the acquisition time and does not assume a periodic heart motion. The analytic dynamic FDK-reconstruction formula is used directly for the motion est...
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PMID: 20573539
PDF is available here.
PDF is available here.
Abstract
Ultrasound physics and instrumentation are the foundations of clinical ultrasound. The key physical principle is the piezoelectric effect. When stimulated by an electric current, certain crystals vibrate and produce ultrasound. A hand-held transducer converts electricity into ultrasound, transmits i...
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PMID: 20923312
PDF is available here.
PDF is available here.
Abstract
We carried out a time-frequency analysis of event-related desynchronization (ERD)/event-related synchronization (ERS) and intertrial coherence. We localized ERD/ERS on each subject's magnetic resonance images using beamformer. We compared ERD/ERS values between the left and right side of regions of...
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PMID: 20634707
PDF is available here.
PDF is available here.
Biological Psychiatry (68)3 2010
Abstract
Optimal decision-making requires that organisms correctly evaluate both the costs and benefits of potential choices. Dopamine transmission within the nucleus accumbens (NAc) has been heavily implicated in reward-learning and decision-making, but it is unclear how dopamine release might contribute to...
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PMID: 20452572
PDF is available here.
PDF is available here.
Abstract
We studied synchrony's behavioral role in the North American firefly, Photinus carolinus. We placed a female in a virtual environment containing artificial males that flashed at varying degrees of synchrony. Females responded to an average of 82% of synchronous flashes compared with as few as 3% of...
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PMID: 20616271
PDF is available here.
PDF is available here.
Abstract
We investigated the hypothesis that elevated stretch may cause valve calcification via a BMP-dependent mechanism. Porcine AV cusps were cultured in a stretch bioreactor, at 10% (physiological) or 15% (pathological) stretch and 70 beats per minute for 3, 7, and 14 days, in osteogenic media supplement...
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PMID: 20489151
PDF is available here.
PDF is available here.
Brain and Language (114)1 2010
Abstract
Despite the importance of semantic relationships to our understanding of semantic knowledge, the nature of the neural processes underlying these abilities are not well understood. In order to investigate these processes, 20 healthy adults listened to thematically related (e.g., leash-dog), taxonomic...
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PMID: 20403632
PDF is available here.
PDF is available here.
Abstract
We show experimentally with in vivo real-time imaging that similar, spontaneous depolarizations cycle repeatedly around ischaemic lesions in the cerebral cortex, and enlarge the lesion in step with each cycle. This behaviour results in regular periodicity of depolarization when monitored at a single...
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PMID: 20504874
PDF is available here.
PDF is available here.
Abstract
We estimated the accuracy of a non-invasive, inexpensive method (the Chinese lunar calendar, CLC) to predict the sex of a baby from around the time of conception, using 2,840,755 singleton births occurring in Sweden between 1973 and 2006. Maternal lunar age and month of conception were estimated, an...
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PMID: 20618730
PDF is available here.
PDF is available here.
Abstract
We measured the coherence in theta oscillations between these two structures in rats learning new rules on a Y maze. Coherence peaked at the choice point, most strongly after task rule acquisition. Simultaneously, Pfc pyramidal neurons reorganized their phase, concentrating at hippocampal theta trou...
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PMID: 20620877
PDF is available here.
PDF is available here.
Journal of Neuroscience (30)26 2010
Abstract
We recorded field potentials directly from the cortical surface of 16 patients while they selectively attended to faces or houses. Here we report that face-specific gamma activity recorded at face-N200 sites is strongly modulated by selective attention, while face-N200 is not. Our results reconcile...
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PMID: 20592199
PDF is available here.
PDF is available here.
Abstract
We want to sketch how some of the higher cognitive functions can be explained by memory processes which are known to modulate gamma activity. Especially, the function of binding together the multiple features of a perceived object requires a comparison with contents stored in memory. In addition, we...
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PMID: 19744515
PDF is available here.
PDF is available here.
Abstract
The primary aim of this review is to examine evidence for a functional role of gamma and theta oscillations in human episodic memory. It is proposed here that gamma and theta oscillations allow for the transient interaction between cortical structures and the hippocampus for the encoding and retriev...
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PMID: 20060015
PDF is available here.
PDF is available here.
Abstract
We investigate this question for memory processes on the basis of different types of oscillatory synchronization mechanisms. The reviewed findings suggest that theta and alpha phase coupling (and phase reorganization) reflect control processes in two large memory systems, a working memory and a comp...
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PMID: 19837109
PDF is available here.
PDF is available here.
Neural Networks (23)5 2010
Abstract
A novel action-dependent adaptive critic design (ACD) is developed for dynamic optimization. The proposed combination of a particle swarm optimization-based actor and a neural network critic is demonstrated through dynamic sleep scheduling of wireless sensor motes for wildlife monitoring. The object...
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PMID: 20223635
PDF is available here.
PDF is available here.
Neural Networks (23)5 2010
Abstract
Support vector machines are state-of-the-art pattern recognition algorithms that are well founded in optimization and generalization theory but not obviously applicable to the brain. This paper presents Bio-SVM, a biologically feasible support vector machine. An unstable associative memory oscillate...
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PMID: 20092978
PDF is available here.
PDF is available here.
Biological Psychiatry (67)11 2010
Abstract
Our findings are in line with S-carriers having an increased response in neural circuits involved in emotional processing to stressful environmental stimuli but here demonstrated as a endophenotype with dynamic changes in serotonin reuptake.
Copyright 2010 Society of Biological Psychiatry. Published...
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PMID: 20110086
PDF is available here.
PDF is available here.
Abstract
When a firefly is made to inhale ethyl acetate vapour, a constant glow appears after a few minutes from its abdominal lantern. This control experiment has been performed by a few workers to record the emission spectrum of the firefly. However, a time-resolved experiment performed by us on this conti...
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PMID: 20689174
PDF is available here.
PDF is available here.
Brain and Development (32)6 2010
Abstract
We compared frequency and power of neonatal EEG delta brush rapid oscillatory activity (ROA) using multiple band frequency analysis (MBFA) in three groups; pre-term (PT, post-conceptional age 33-35.6 weeks, n=5); full-term (FT, 39.4-40.6 weeks, n=5) and pre-term or full-term with phenobarbital expos...
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PMID: 19682808
PDF is available here.
PDF is available here.
NeuroImage (51)1 2010
Abstract
We characterized the power modulations of spontaneous magnetoencephalography (MEG) rhythms recorded from human subjects during wakeful rest (with eyes open and eyes closed) and light sleep. Through spectral, correlation and coherence analyses, we found that resting-state MEG rhythms demonstrated ult...
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PMID: 20123024
PDF is available here.
PDF is available here.
NeuroImage (51)1 2010
Abstract
It has been found in numerous electroencephalographic (EEG) studies that a negative potential arises following an erroneous response (so-called Error-Related Negativity, ERN). This typical component of the EEG has, however, proven more difficult to identify when transferring analogous paradigms to m...
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PMID: 20149884
PDF is available here.
PDF is available here.
NeuroImage (51)1 2010
Abstract
We introduce a new circular statistic, the PPC (pairwise phase consistency). We demonstrate that the sample estimate of the PPC is a bias-free and consistent estimator of its corresponding population parameter. We show, both analytically and by means of numerical simulations, that the population sta...
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PMID: 20114076
PDF is available here.
PDF is available here.
NeuroImage (51)1 2010
Abstract
We used this technique to study the spatial and temporal dynamics of CSF flow in the ventricular system of 40 normal volunteers. Classification of the patterns of CSF flow based on calculation of three-dimensional particle path lines over the cardiac cycle revealed one uniform flow pattern for the l...
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PMID: 20152907
PDF is available here.
PDF is available here.
NeuroImage (51)1 2010
Abstract
We studied the functional connectivity between the primary and secondary somatosensory cortices (SI and SII) in healthy subjects using magnetoencephalography (MEG) with excellent spatiotemporal resolution. First, somatosensory-evoked magnetic fields were recorded to determine the locations of each c...
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PMID: 20149885
PDF is available here.
PDF is available here.
Neural Computation (22)5 2010
Abstract
The roles of inhibitory neurons in synchronous firing are examined in a network of excitatory and inhibitory neurons with Watts and Strogatz's rewiring. By examining the persistence of the synchronous firing that exists in the random network, it was found that there is a probability of rewiring at w...
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PMID: 20100075
PDF is available here.
PDF is available here.
Neural Computation (22)5 2010
Abstract
We investigated whether and how the onset discharges influence the sustained discharges that are believed to play a central role in encoding auditory information. Onset discharges, triggered by a phasic input, briefly excited GABAergic interneurons and transiently increased the level of ambient GABA...
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PMID: 20100072
PDF is available here.
PDF is available here.
Pharmacopsychiatry (43 Suppl 1) 2010
Abstract
We use computational models of varying complexity to investigate the role of synaptic modifications for cortical network properties. In particular, we study how the dynamics can be regulated by neuromodulators, intrinsic noise and chemical agents. We focus on the complex neurodynamics and its modula...
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PMID: 20486052
PDF is available here.
PDF is available here.
Neuropsychologia (48)6 2010
Abstract
We investigated the effects of rotatory body accelerations on the reproduction of an acoustic isochronous pacing rhythm. In a first experiment, healthy participants performed a finger tapping task in which responses were either synchronized to the rhythm (Synchronization), or performed in absence of...
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PMID: 20227429
PDF is available here.
PDF is available here.
Animal Reproduction Science (119)1-2 2010
Abstract
These results in guanacos suggest a follicular wave pattern more similar to the llama (Lama glama) than previously described in other South American and Old World camelid species.
Copyright 2009. Published by Elsevier B.V....
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PMID: 20022436
PDF is available here.
PDF is available here.
Animal Reproduction Science (119)1-2 2010
Abstract
The spiny rat (Trinomys moojeni) is a rodent found in the Atlantic Forest, which is considered one of the most diverse and threatened biomes in the world. Knowledge on reproductive biology and physiology is critical to conservation and species management, allowing the prevention of extinction and th...
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PMID: 20018466
PDF is available here.
PDF is available here.
Experimental Brain Research (202)4 2010
Abstract
We tested 23 healthy participants who performed rhythmic horizontal movements of the elbow. The required amplitude and frequency ranges of the movements were specified to the participants using a closed shape on a phase-plane display, showing angular velocity versus angular position, such that parti...
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PMID: 20169338
PDF is available here.
PDF is available here.
Neuroscience Letters (474)2 2010
Abstract
We invited six pairs of participants to coordinate their stepping movements at seven prescribed relative phases (between 0 degrees and 180 degrees ) to scan the attractor layout governing their coordination. Two auditory metronomes, one for each participant, specified the required relative phase. Fo...
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PMID: 20226230
PDF is available here.
PDF is available here.
Brain Research (1324) 2010
Abstract
We provide further evidence of surprisingly rich cortical activity patterns during early development and document, in P5-P13 rats, the appearance, disappearance, and transient expression of three cortical events and oscillations. EEG activity in frontal, parietal, and occipital cortices was recorded...
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PMID: 20138849
PDF is available here.
PDF is available here.
Journal of Neuroscience (30)15 2010
Abstract
Dlx5 and Dlx6 homeobox genes are expressed in developing and mature cortical interneurons. Simultaneous deletion of Dlx5 and 6 results in exencephaly of the anterior brain; despite this defect, prenatal basal ganglia differentiation appeared largely intact, while tangential migration of Lhx6(+) and...
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PMID: 20392955
PDF is available here.
PDF is available here.
Abstract
Initially, pHFOs were recorded with microelectrodes in the hippocampus of rodents and patients with mesial temporal lobe epilepsy (MTLE), but recently pHFOs have also been recorded with clinical depth and grid electrodes in multiple brain areas including the hippocampus and neocortex of patients wit...
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PMID: 20160649
PDF is available here.
PDF is available here.
Abstract
The present study shows the results of visualization experiments of the jet formation through a dynamic model of the human vocal folds. The model consists of two counter-rotating, 3D-shaped driven cams covered with a stretched silicone membrane. The 3D contours of the cams are a result of an optimiz...
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PMID: 20350076
PDF is available here.
PDF is available here.
Abstract
Large sections of many types of engineering construction can be considered to constitute a two-dimensional periodic structure, with examples ranging from an orthogonally stiffened shell to a honeycomb sandwich panel. In this paper, a method is presented for computing the boundary (or edge) impedance...
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PMID: 20369993
PDF is available here.
PDF is available here.
Abstract
Brain-computer interface (BCI) systems do not work for all users. This article introduces a novel combination of tasks that could inspire BCI systems that are more accurate than conventional BCIs, especially for users who cannot attain accuracy adequate for effective communication. Subjects performe...
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PMID: 20332550
PDF is available here.
PDF is available here.
Abstract
We consider the potential functional role of beta-band oscillations, which at present is not yet well understood. We discuss evidence from recent studies on top-down mechanisms involved in cognitive processing, on the motor system and on the pathophysiology of movement disorders that suggest a unify...
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PMID: 20359884
PDF is available here.
PDF is available here.
Abstract
Sensory processing is often regarded as a passive process in which biological receptors like photoreceptors and mechanoreceptors transduce physical energy into a neural code. Recent findings, however, suggest that: first, most sensory processing is active, and largely determined by motor/attentional...
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PMID: 20307966
PDF is available here.
PDF is available here.
Neural Networks (23)3 2010
Abstract
We believe that it is beneficial for the next generation of humanoid robots to have a flexible spine as humans do. In order to cope with the increased complexity in controlling this type of robot, a new kind of control system is necessary. Currently, there is no controller that allows a flexible spi...
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PMID: 20031370
PDF is available here.
PDF is available here.
Pediatric Research (67)4 2010
Abstract
We studied cardiovascular rhythms by Fourier analysis of 24-h ambulatory blood pressure (BP) measurement profiles in 129 hypertensive children, 54 children with WCH, and 146 age-, height-, and gender-matched healthy subjects. The day/night mean arterial pressure ratio was lower in hypertensive and p...
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PMID: 20032814
PDF is available here.
PDF is available here.
Abstract
An 8-year-old girl presented with a relatively asymptomatic abdominopelvic mass that was detected in the neonatal period. She harbored a presacral mass with intraspinal extension and a right posterior mediastinal mass; all were excised completely and were ganglioneuromas. The report discusses the ma...
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PMID: 20385294
PDF is available here.
PDF is available here.
Neuroreport (21)5 2010
Abstract
We determine under which conditions the propagation of weak periodic signals through a feedforward Hodgkin-Huxley neuronal network is optimal. We find that successive neuronal layers are able to amplify weak signals introduced to the neurons forming the first layer only above a certain intensity of...
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PMID: 20186108
PDF is available here.
PDF is available here.
Neuroscience Letters (473)1 2010
Abstract
The pre-Bötzinger complex (pre-BötC), a subregion of the ventrolateral medulla involved in respiratory rhythm generation, contains intrinsically bursting pacemaker neurons. A previous study proposed Hodgkin-Huxley type minimal models for pacemaker neurons and predicted the effect of a hyperpolariz...
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PMID: 20152884
PDF is available here.
PDF is available here.
Cerebellum (9)1 2010
Abstract
These results show firstly that slow concerted activity can readily engage the entire cerebrocerebellar loop. Secondly, they raise the possibility that fast gamma oscillations may be incompatible with cerebellar processing and get blocked out. Future studies in behaving animals are needed to answer...
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PMID: 19902318
PDF is available here.
PDF is available here.
Abstract
Abstract
These results show that changes in muscle damage markers were attenuated in the second EMS bout compared with the initial EMS bout....
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PMID: 19908060
PDF is available here.
PDF is available here.
Abstract
We address this problem by analysing the expression stability of eight potential tobacco reference genes. Primers targeting each gene (18S rRNA, EF-1alpha, Ntubc2, alpha- and beta-tubulin, PP2A, L25 and actin) were developed and optimized. The expression of each gene was then measured by real-time P...
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PMID: 20098998
PDF is available here.
PDF is available here.