Filters








1,106 Hits in 9.4 sec

Oscillatory Activity and Phase–Amplitude Coupling in the Human Medial Frontal Cortex during Decision Making

Michael X Cohen, Christian E. Elger, Juergen Fell
2009 Journal of Cognitive Neuroscience  
Here, we examined oscillatory activity of the human medial frontal cortex recorded while subjects played a competitive decision-making game.  ...  Medial frontal oscillatory characteristics during decision making remain largely unknown.  ...  Acknowledgments We thank Charan Ranganath for his help designing the experiment, and Beate Newport and Nicole David for technical assistance.  ... 
doi:10.1162/jocn.2008.21020 pmid:18510444 fatcat:mladejluirexpb5qt62scdszqa

Page 390 of Journal of Cognitive Neuroscience Vol. 21, Issue 2 [page]

2009 Journal of Cognitive Neuroscience  
Oscillatory Activity and Phase-Amplitude Coupling in the Human Medial Frontal Cortex during Decision Making Michael X Cohen'”, Christian E.  ...  Here, we examined oscillatory activity of the human medial frontal cortex recorded while subjects played a competitive decision-making game.  ... 

Medial prefrontal theta phase coupling during spatial memory retrieval

Raphael Kaplan, Daniel Bush, Mathilde Bonnefond, Peter A. Bandettini, Gareth R. Barnes, Christian F. Doeller, Neil Burgess
2014 Hippocampus  
cortex (mPFC), and the phase of this oscillation is coupled both with ongoing theta phase in the medial temporal lobe (MTL) and perceptually induced 65-85 Hz gamma amplitude in medial parietal cortex.  ...  These results suggest that theta phase coupling between mPFC and MTL and theta-gamma phase-amplitude coupling between mPFC and neocortical regions may play a role in human spatial memory retrieval.  ...  Acknowledgments The authors thank James Bisby, Marc Guitart-Masip, Aidan Horner, Ole Jensen, Vladimir Litvak, and Will Penny for helpful discussion.  ... 
doi:10.1002/hipo.22255 pmid:24497013 pmcid:PMC4028411 fatcat:5bwmyn6nqrboxkmnt7nodojtde

Nuclei Accumbens Phase Synchrony Predicts Decision-Making Reversals Following Negative Feedback

M. X Cohen, N. Axmacher, D. Lenartz, C. E. Elger, V. Sturm, T. E. Schlaepfer
2009 Journal of Neuroscience  
We recorded local field potentials from the human nucleus accumbens and the medial frontal cortex (via surface EEG) from patients who had deep brain stimulation electrodes implanted.  ...  Here, we report that electrophysiological oscillatory phase synchrony between the two nuclei accumbens may play a crucial role in using negative feedback to guide decision making.  ...  In particular, switches in decision-making strategy were preceded by enhanced oscillatory phase synchrony between the two nuclei accumbens, and a break-down of phase-amplitude coupling within each accumbens  ... 
doi:10.1523/jneurosci.5335-08.2009 pmid:19515927 pmcid:PMC2725399 fatcat:643enzvbirhrpp5hqotkhk7yfq

Progesterone modulates theta oscillations in the frontal-parietal network [article]

Justin Riddle, Sangtae Ahn, Trevor McPherson, Susan Girdler, Flavio Frohlich
2020 bioRxiv   pre-print
Finally, P4 concentration correlated with increased coupling between FMT phase and posterior gamma amplitude.  ...  Electrical brain activity was analyzed using Morlet wavelet convolution, beamformer source localization, background noise spectral fitting, and phase amplitude coupling analysis.  ...  coupling (PAC) is a proposed mechanism for top-down cognitive control 223 in the human brain, in which the phase of low frequency oscillations in the prefrontal cortex are 224 coupled to high frequency  ... 
doi:10.1101/2020.01.16.909374 fatcat:miexsocr3nfojpg5decgckzsh4

Disturbed theta and gamma coupling as a potential mechanism for visuospatial working memory dysfunction in people with schizophrenia

Peter A. Lynn, Scott R. Sponheim
2016 Neuropsychiatric Electrophysiology  
Relatively recent investigations have examined the role of neural oscillatory activity during visuospatial WM function in healthy people, as well as dysfunction in psychopathology.  ...  Aberrant oscillatory activity in theta and gamma frequency ranges has since been proposed as a potential underlying factor in WM dysfunction in PSZ and REL.  ...  Acknowledgements We are grateful for the commentary of this paper's reviewers, whose recommendations greatly improved upon the original manuscript.  ... 
doi:10.1186/s40810-016-0022-3 fatcat:cy65arss5rfr5lzlzpv6scxcxe

Dynamic frontotemporal systems process space and time in working memory

Elizabeth L. Johnson, Jenna N. Adams, Anne-Kristin Solbakk, Tor Endestad, Pål G. Larsson, Jugoslav Ivanovic, Torstein R. Meling, Jack J. Lin, Robert T. Knight, Matthew Rushworth
2018 PLoS Biology  
Theta band oscillations drove bidirectional interactions between the PFC and medial temporal lobe (MTL; including the hippocampus).  ...  Dominant views of working memory focus on the prefrontal cortex (PFC), but human hippocampal recordings provide a neurophysiological signature distinct from the PFC.  ...  Parvizi for assisting in the collection of data at Stanford University Medical Center. We also thank S. M. Griffin for creating Fig 1B, Dynamic frontotemporal systems for working memory  ... 
doi:10.1371/journal.pbio.2004274 pmid:29601574 pmcid:PMC5895055 fatcat:abed3sugvjd3tgudynu5vohxjm

The Oscillatory Basis of Working Memory Function and Dysfunction in Epilepsy

Olivia N. Arski, Julia M. Young, Mary-Lou Smith, George M. Ibrahim
2021 Frontiers in Human Neuroscience  
Here, we review the functional roles of neural oscillations in subserving WM and the putative mechanisms by which epilepsy disrupts normative activity, leading to aberrant oscillatory signatures.  ...  These include the hippocampus and default mode network as well as the prefrontal cortex and frontoparietal central executive network.  ...  The authors also identified a network comprising regions of the FP-CEN, which demonstrated a pattern of activity consistent with decision-making.  ... 
doi:10.3389/fnhum.2020.612024 pmid:33584224 pmcid:PMC7874181 fatcat:mwkygh7mxfgrdikhhctzjyctfu

Brain oscillations and memory

Emrah Düzel, Will D Penny, Neil Burgess
2010 Current Opinion in Neurobiology  
Oscillatory fluctuations of local field potentials (LFPs) in the theta (4-8 Hz) and gamma band are held to play a mechanistic role in various aspects of memory including the representation and off-line  ...  Recent findings indicate that theta and gamma related mechanisms identified in rodent studies have significant parallels in the neurophysiology of human and non-human primate memory.  ...  Theta phase precession has also been observed in the firing of 'grid cells' in the medial entorhinal cortex [30] one of the main neocortical inputs to the hippocampus.  ... 
doi:10.1016/j.conb.2010.01.004 pmid:20181475 fatcat:rxruxrcapbg57omelyxsg6ohze

Reply: Oscillatory coupling of the subthalamic nucleus in obsessive compulsive disorder

Ettore A Accolla, Andreas Horn, Maria Herrojo-Ruiz, Wolf-Julian Neumann, Andrea A. Kühn
2017 Brain  
., 2015) and cortico-cortical coupling (Weiss et al., 2015) and phase amplitude coupling (de Hemptinne et al., 2014) .  ...  , particularly conflict resolution, and the relevance of this function in OCD pathogenesis: STN-medial prefrontal cortex theta coherence was shown increased in high-conflict decision making (Zavala et  ... 
doi:10.1093/brain/awx165 pmid:29050378 fatcat:yycjn7obtbaqdn7qlvjjogugoy

Human neural correlates of sevoflurane-induced unconsciousness

B.J.A. Palanca, M.S. Avidan, G.A. Mashour
2017 British Journal of Anaesthesia  
Combined EEG and PET investigations have identified changes in cerebral blood flow and metabolic activity in frontal, parietal, and thalamic regions during sevoflurane-induced loss of consciousness.  ...  The relative timing of scalp potentials in frontal and parietal EEG signals suggests that sevoflurane might perturb the propagation of neural information between underlying cortical regions.  ...  During wakefulness, 0.1-1 Hz phase and 8-13 Hz amplitude coupling exists in the parietal but not in the frontal EEG. 30 Three different patterns have been observed for slow delta phase-alpha amplitude  ... 
doi:10.1093/bja/aex244 pmid:29121298 pmcid:PMC6172973 fatcat:4kcks6hzvrgejg5xm24vn5lwia

Theta phase mediates deliberate action switching in human Supplementary Motor Areas [article]

Giovanni Maffei, Riccardo Zucca, Jordi Ysard Puigbo, Diogo Santos Pata, Marco Galli, Adria Tauste Campo, Rodrigo Rocamora Zuniga, Paul F.M.J. Verschure
2021 bioRxiv   pre-print
In addition, theta phase modulated the amplitude of gamma oscillations, with higher cross-frequency coupling in faster trials.  ...  We found that SMAs were exclusively active during trials that demand action reprogramming in response to the unexpected cue but were silent during automatic action execution.  ...  it has been recently shown that the medial frontal cortex can flexibly recruit the medial 473 temporal lobe during decision-making by means of phase synchrony in the theta band (34).  ... 
doi:10.1101/2021.05.06.442965 fatcat:ixufvsfzsbeprklr4lxda7e3vi

Transcranial Current Stimulation as a Tool of Neuromodulation of Cognitive Functions in Parkinson's Disease

Ivan V. Brak, Elena Filimonova, Oleg Zakhariya, Rustam Khasanov, Ivan Stepanyan
2022 Frontiers in Neuroscience  
Here we reviewed the current understanding of the pathogenesis of cognitive impairment in PD and of the effects of transcranial direct current stimulation and transcranial alternating current stimulation  ...  Decrease in cognitive function is one of the most common causes of poor life quality and early disability in patients with Parkinson's disease (PD).  ...  Studies on animal models showed that oscillatory activity in the delta range at the time of performing a cognitive task was reduced in mice with a local dopamine deficiency in MFC (medial frontal cortex  ... 
doi:10.3389/fnins.2022.781488 pmid:35903808 pmcid:PMC9314857 fatcat:s5gy4mqzabfbnkn2xgvvq46uxy

Right frontal cortex generates reward-related theta-band oscillatory activity

Gregory J. Christie, Matthew S. Tata
2009 NeuroImage  
Acknowledgments The authors thank Richard Worsey and Andrew Butcher for assistance with experimental design and Dr. Robert Williams and Dr. Robert Sutherland for helpful discussion.  ...  This work was supported by the Alberta Gaming Research Institute and NSERC Discovery Grants to MST.  ...  It is associated with reward-based learning (Bellebaum and Daum, 2008) and adaptive decision-making .  ... 
doi:10.1016/j.neuroimage.2009.06.076 pmid:19591949 fatcat:z7vfx56erncmrp6ptcppovmf3e

Targeting the neurophysiology of cognitive systems with transcranial alternating current stimulation

Flavio Fröhlich, Kristin K Sellers, Asa L Cordle
2014 Expert Review of Neurotherapeutics  
band appears to underlie decision-making [23] and slow oscillatory activity aids the consolidation of declarative memories [24] .  ...  for regulatory control during risky decision-making.  ... 
doi:10.1586/14737175.2015.992782 pmid:25547149 pmcid:PMC4634940 fatcat:neqglowx2rfm7gfv7hn4ruoeqi
« Previous Showing results 1 — 15 out of 1,106 results