210 Hits in 3.7 sec

Neural activity reveals effects of aging on inhibitory processes during word retrieval

Ranjini Mohan, Christine Weber
2018 Aging, Neuropsychology and Cognition  
Shorter naming latencies and phonological judgment RTs for high frequency words could have been a result of faster activation of the semantic representation of the picture or faster retrieval of phonological  ...  Word Frequency Modulated Naming Latency and Phonological Judgment According to TD model, infrequently used words or low frequency words with fewer interconnected nodes will result in greater retrieval  ... 
doi:10.1080/13825585.2018.1519105 pmid:30223706 fatcat:fuh6sdimp5c4rjyhtri5ve5v5q

Semantic Congruence Enhances Memory of Episodic Associations: Role of Theta Oscillations

Mercedes Atienza, Maite Crespo-Garcia, Jose L. Cantero
2011 Journal of Cognitive Neuroscience  
The present study evaluates whether changes in electroencephalographic theta source dynamics mediate the positive influence of semantic congruence on incidental associative learning.  ...  These results are in agreement with the attention to memory model.  ...  Estimation of Brain Theta Sources Source imaging of the EEG induced theta activity was performed in the time-frequency domain with two aims: (i) approximately identifying (with a low spatial resolution  ... 
doi:10.1162/jocn.2009.21358 pmid:19925185 fatcat:25r6ac467zcmdjmoqnrlhisam4

What Electrophysiology Tells Us About Alzheimer's Disease: A Window into the Synchronization and Connectivity of Brain Neurons

Claudio Babiloni, Katarzyna Blinowska, Laura Bonanni, Andrej Cichocki, Willem De Haan, Claudio del Percio, Bruno Dubois, Javier Escudero, Alberto Fernández, Giovanni Frisoni, Bahar Guntekin, Mihaly Hajos (+29 others)
2019 Neurobiology of Aging  
However, current international guidelines do not endorse the use of electroencephalographic (EEG)/magnetoencephalographic (MEG) biomarkers in clinical trials performed in patients with Alzheimer's disease  ...  These preliminary MEG results on at risk populations were challenged in a study that compared 102 MCI patients to 82 age-matched controls and found that mutual information and functional connectivity estimates  ...  Panel 2: Experimental conditions of recordings of electroencephalographic (EEG) and magnetoencephalographic (MEG) signals in humans Resting state and sleep • EEG/MEG signals are recorded for few minutes  ... 
doi:10.1016/j.neurobiolaging.2019.09.008 pmid:31739167 fatcat:4qovqzkklfduvane3tuttfnfem

Neocortical Connectivity during Episodic Memory Formation

Christopher Summerfield, Matthew Greene, Tor Wager, Tobias Egner, Joy Hirsch, Jennifer Mangels, Mick Rugg
2006 PLoS Biology  
Using connectivity analyses, we show that correlation in the hemodynamic signal between face-and place-sensitive voxels and the left dorsolateral prefrontal cortex is a reliable predictor of successful  ...  These data support the view that during episodic encoding, "topdown" control signals originating in the prefrontal cortex help determine which perceptual information is fated to be bound into the new episodic  ...  Preliminary evidence for fronto-posterior interactions during encoding has been offered by scalp electroencephalographic studies, in which phase-locking of neuronal oscillations in the theta-band (4)  ... 
doi:10.1371/journal.pbio.0040128 pmid:16605307 pmcid:PMC1436028 fatcat:x63sn3enxzfcldpgixyzr42agq

Is there a common oscillatory brain mechanism for producing and predicting language?

Nicola Molinaro, Irene F. Monsalve, Mikel Lizarazu
2015 Language, Cognition and Neuroscience  
We try to better characterize what processing dynamics the pre-stimulus beta-band activity represents, illustrating with some results from our lab.  ...  Both prediction and production in language imply information processing percolating down from abstract semantic representations to lower-level processing steps, either for articulation (action) or active  ...  signal).  ... 
doi:10.1080/23273798.2015.1077978 fatcat:q2pwj2gwjrdhfe6xykwjdvwqri

Bottom-up visual attention model for still image: a preliminary study

Adhi Prahara, Murinto Murinto, Dewi Pramudi Ismi
2020 IJAIN (International Journal of Advances in Intelligent Informatics)  
From the study, the use of low-level features, center-surround mechanism, sparse representation, and higher-level guidance with intrinsic cues dominate the bottom-up visual attention approaches.  ...  The preliminary study briefly covers from the biological perspective of visual attention, including visual pathway, the theory of visual attention, to the computational model of bottom-up visual attention  ...  This creates an efficient visual field area where small central area describes detail with high resolution while the lateral region covers large visual area with low resolution [17] .  ... 
doi:10.26555/ijain.v6i1.469 fatcat:blbdxhlzjjcvhpm7dtimctgepq

Mining EEG with SVM for Understanding Cognitive Underpinnings of Math Problem Solving Strategies

Paul Bosch, Mauricio Herrera, Julio López, Sebastián Maldonado
2018 Behavioural Neurology  
Data was collected from experiments focused on the study of cognitive processes that might evoke different specific strategies in the resolution of math problems.  ...  A binary classification problem was constructed using correlations and phase synchronization between different electroencephalographic channels as characteristics and, as labels or classes, the math performances  ...  On the other hand, some tools and approaches have been specifically tailored to grasp the complexity of brain electric activity through the analysis of electroencephalographic (EEG) signals [5] .  ... 
doi:10.1155/2018/4638903 pmid:29670667 pmcid:PMC5835340 fatcat:uofdxcbij5aq3fylnpvdaxvhna

Appropriating Biosensors as Embodied Control Structures in Interactive Music Systems

Luís Aly, Hugo Silva, Gilberto Bernardes, Rui Penha
2021 Human Technology: An Interdisciplinary Journal on Humans in ICT Environments  
Observed data show that our hypothesis is consistent with the historical evolution of the biosensor-driven IMSs.  ...  A broad catalog of 70 biosensor-driven IMSs, ranging in publication dates from 1965 to 2019, was compiled and categorized according to the proposed taxonomy.  ...  Regarding the process of identifying the historical trends resulting from the taxonomy, we plotted the data of each dimension of the taxonomy to reflect its temporal evolution with multiple resolutions  ... 
doi:10.17011/ht/urn.202106223978 fatcat:oxh3x4g64faoplzwe3mrkq7bby

Final Program

2020 2020 17th International Conference on Electrical Engineering, Computing Science and Automatic Control (CCE)  
A Preliminary Approach Emg Reduced low-voltage electromyographic signal acquisition system using subthreshold technique Emg A Functional Electrical Stimulation Controller for Contralateral Hand Movements  ...  Then, considering these results, EJPNet is a feasible semantic segmentation method for embedded systems applications.  ... 
doi:10.1109/cce50788.2020.9299182 fatcat:dff7ylnwrzabdcv276gbwcgkji

Sleep for Preserving and Transforming Episodic Memory

Marion Inostroza, Jan Born
2013 Annual Review of Neuroscience  
Electroencephalographic (EEG) oscillations regulate the underlying communication: Hippocampal sharp-wave ripples coalescing with thalamic spindles mediate the bottom-up transfer of reactivated memory information  ...  Other signals, e.g., low corticosteroid levels during SWS, add to this effect.  ...  Importantly, if a memory is retained as a context-dependent episode, it will still require the hippocampus, but the hippocampus is basically dispensable when retrieving semantic memories.  ... 
doi:10.1146/annurev-neuro-062012-170429 pmid:23642099 fatcat:q2742t7tmrdnbcu5ztiuchco6e

Individual alpha frequency modulates sleep-related emotional memory consolidation

Zachariah R. Cross, Amanda Santamaria, Andrew W. Corcoran, Alex Chatburn, Phillip M. Alday, Scott Coussens, Mark J. Kohler
2020 Neuropsychologia  
These results highlight the importance of individual factors in the EEG in modulating oscillatory-related memory consolidation and subsequent behavioural outcomes and test predictions proposed by models  ...  The resulting signal 430 was then smoothed in the same window with a moving average.  ...  RESULTS 514 515 Preliminary analyses 516 Preliminary analyses were conducted to determine whether there were 517 differences in levels of self-perceived sleepiness between the Sleep and Wake 518 conditions  ... 
doi:10.1016/j.neuropsychologia.2020.107660 pmid:33075330 fatcat:kppptnkx7feyxl3de3attbwvvq

P300 and alpha event-related desynchronization (ERD)

Juliana Yordanova, Vasil Kolev, John Polich
2001 Psychophysiology  
In the present study we evaluated the relationships between the P300 event-related potential and event-related desynchronization (ERD) of electroencephalographic alpha activity by simultaneously analyzing  ...  In contrast to the classical ERD method integrating the signal with typical time resolution of 125 ms or more, this approach gives a detailed time-course definition and resolution corresponding to the  ...  EEG was amplified with band limits of 0.16 and 70 Hz by means of a Nihon Kohden Electroencephalograph (model EEG-4314F).  ... 
doi:10.1111/1469-8986.3810143 pmid:11321615 fatcat:5iskumxdezaetg6ozseddxplwu

P300 and alpha event-related desynchronization (ERD)

2001 Psychophysiology  
In the present study we evaluated the relationships between the P300 event-related potential and event-related desynchronization (ERD) of electroencephalographic alpha activity by simultaneously analyzing  ...  In contrast to the classical ERD method integrating the signal with typical time resolution of 125 ms or more, this approach gives a detailed time-course definition and resolution corresponding to the  ...  EEG was amplified with band limits of 0.16 and 70 Hz by means of a Nihon Kohden Electroencephalograph (model EEG-4314F).  ... 
doi:10.1017/s0048577201990079 pmid:11321615 fatcat:2xnt4khfj5bevbamzegzgse76m

Learning and memory [chapter]

Anna-katharine Brem, Kathy Ran, Alvaro Pascual-leone
2013 Handbook of Clinical Neurology  
They offer the combination of interference methods (TMS, tDCS) with techniques to record ongoing brain activity with high temporal (EEG) and spatial (MRI) resolution.  ...  While the left PFC is believed to be more involved in encoding and semantic retrieval, the right PFC is thought to be more important in episodic memory retrieval.  ...  is more involved in semantic retrieval and episodic encoding than the right PFC, whereas the right PFC is involved in episodic retrieval (Tulving et al., 1994) .  ... 
doi:10.1016/b978-0-444-53497-2.00055-3 pmid:24112934 pmcid:PMC4248571 fatcat:xgnntahdergq7ov3ooj4irjvt4

International Federation of Clinical Neurophysiology (IFCN) – EEG research workgroup: Recommendations on frequency and topographic analysis of resting state EEG rhythms. Part 1: Applications in clinical research studies

Claudio Babiloni, Robert J. Barry, Erol Başar, Katarzyna J. Blinowska, Andrzej Cichocki, Wilhelmus H.I.M. Drinkenburg, Wolfgang Klimesch, Robert T. Knight, Fernando Lopes da Silva, Paul Nunez, Robert Oostenveld, Jaeseung Jeong (+3 others)
2019 Clinical Neurophysiology  
Concerning the frequency resolution, the longer the epoch, the higher the resolution (e.g., 1 s, 1 Hz; 2 s, 0.5 Hz, etc.).  ...  distortion of the low spatial frequencies due to aliasing.  ... 
doi:10.1016/j.clinph.2019.06.234 pmid:31501011 fatcat:psp6t4czorbsndn4gp5m4o3elu
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