Browsing by Author "Ponce-Alvarez, Adrián"

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  • Pfeffer, Thomas; Ponce-Alvarez, Adrián; Tsetsos, Konstantinos; Meindertsma, Thomas; Gahnström, Christoffer Julius; van den Brink, Ruud Lucas; Nolte, Guido; Engel, Andreas Karl; Deco, Gustavo; Donner, Tobias Hinrich (American Association for the Advancement of Science (AAAS), 2021)
    Influential theories postulate distinct roles of catecholamines and acetylcholine in cognition and behavior. However, previous physiological work reported similar effects of these neuromodulators on the response ...
  • Ponce-Alvarez, Adrián; Mochol, Gabriela; Hermoso Mendizábal, Ainhoa; De la Rocha, Jaime; Deco, Gustavo (eLife, 2020)
    Previous research showed that spontaneous neuronal activity presents sloppiness: the collective behavior is strongly determined by a small number of parameter combinations, defined as ‘stiff’ dimensions, while it is ...
  • Gilson, Matthieu; Moreno Bote, Rubén; Ponce-Alvarez, Adrián; Ritter, Petra; Deco, Gustavo (Public Library of Science (PLoS), 2016)
    The brain exhibits complex spatio-temporal patterns of activity. This phenomenon is governed by an interplay between the internal neural dynamics of cortical areas and their connectivity. Uncovering this complex relationship ...
  • Demertzi, Athena; Kucyi, Aaron; Ponce-Alvarez, Adrián; Keliris, Georgios A.; Whitfield-Gabrieli, Susan; Deco, Gustavo (MIT Press, 2022)
    Spontaneous brain activity changes across states of consciousness. A particular consciousness-mediated configuration is the anticorrelations between the default mode network and other brain regions. What this antagonistic ...
  • Deco, Gustavo; Ponce-Alvarez, Adrián; Hagmann, Patric; Romani, Gian Luca; Mantini, Dante; Corbetta, Maurizio (Society for Neuroscience, 2014)
    The spontaneous activity of the brain shows different features at different scales. On one hand, neuroimaging studies show that long-range correlations are highly structured in spatiotemporal patterns, known as resting-state ...
  • Jobst, Beatrice M.; Atasoy, Selen; Ponce-Alvarez, Adrián; Sanjuán, Ana; Roseman, Leor; Kaelen, Mendel; Carhart-Harris, Robin L.; Kringelbach, Morten L.; Deco, Gustavo (Elsevier, 2021)
    Lysergic acid diethylamide (LSD) is a potent psychedelic drug, which has seen a revival in clinical and pharmacological research within recent years. Human neuroimaging studies have shown fundamental changes in brain-wide ...
  • Jobst, Beatrice M.; Hindriks, Rikkert; Laufs, Helmut; Tagliazucchi, Enzo; Hahn, Gerald; Ponce-Alvarez, Adrián; Stevner, Angus B. A.; Kringelbach, Morten L.; Deco, Gustavo (Nature Research, 2017)
    Recent research has found that the human sleep cycle is characterised by changes in spatiotemporal patterns of brain activity. Yet, we are still missing a mechanistic explanation of the local neuronal dynamics underlying ...
  • Saenger Amoore, Victor Manuel; Ponce-Alvarez, Adrián; Adhikari, Mohit H.; Hagmann, Patric; Deco, Gustavo; Corbetta, Maurizio (Oxford University Press, 2017)
    The brain is a network that mediates information processing through a wide range of states. The extent of state diversity is a reflection of the entropy of the network. Here we measured the entropy of brain regions (nodes) ...
  • López-González, Ane; Panda, Rajanikant; Ponce-Alvarez, Adrián; Zamora-López, Gorka; Escrichs, Anira; Martial, Charlotte; Thibaut, Aurore; Gosseries, Olivia; Kringelbach, Morten L.; Annen, Jitka; Laureys, Steven; Deco, Gustavo (Nature Research, 2021)
    Low-level states of consciousness are characterized by disruptions of brain activity that sustain arousal and awareness. Yet, how structural, dynamical, local and network brain properties interplay in the different levels ...
  • Ruffini, Giulio; Damiani, Giada; Lozano-Soldevilla, Diego; Deco, Nikolas; Rosas, Fernando E.; Kiani, Narsis A.; Ponce-Alvarez, Adrián; Kringelbach, Morten L.; Carhart-Harris, Robin L.; Deco, Gustavo (Public Library of Science (PLoS), 2023)
    A topic of growing interest in computational neuroscience is the discovery of fundamental principles underlying global dynamics and the self-organization of the brain. In particular, the notion that the brain operates near ...
  • Ponce-Alvarez, Adrián; Uhrig, Lynn; Deco, Nikolas; Signorelli, Camilo Miguel; Kringelbach, Morten L.; Jarraya, Béchir; Deco, Gustavo (Oxford University Press, 2022)
    The study of states of arousal is key to understand the principles of consciousness. Yet, how different brain states emerge from the collective activity of brain regions remains unknown. Here, we studied the fMRI brain ...
  • Glomb, Katharina; Ponce-Alvarez, Adrián; Gilson, Matthieu; Ritter, Petra; Deco, Gustavo (Elsevier, 2017)
    It is well-established that patterns of functional connectivity (FC) - measures of correlated activity between pairs of voxels or regions observed in the human brain using neuroimaging - are robustly expressed in spontaneous ...
  • Deco, Gustavo; Ponce-Alvarez, Adrián; Mantini, Dante; Romani, Gian Luca; Hagmann, Patric; Corbetta, Maurizio (Society for Neuroscience, 2013)
    Brain fluctuations at rest are not random but are structured in spatial patterns of correlated activity across different brain areas. The/nquestion of how resting-state functional connectivity (FC) emerges from the brain’s ...
  • Ponce-Alvarez, Adrián; Deco, Gustavo; Hagmann, Patric; Romani, Gian Luca; Mantini, Dante; Corbetta, Maurizio (Public Library of Science (PLoS), 2015)
    Spatial patterns of coherent activity across different brain areas have been identified during/nthe resting-state fluctuations of the brain. However, recent studies indicate that resting-state/nactivity is not stationary, ...
  • Hahn, Gerald; Ponce-Alvarez, Adrián; Monier, Cyril; Benvenuti, Giacomo; Kumar, Arvind; Chavane, Frédéric; Deco, Gustavo; Frégnac, Yves (Public Library of Science (PLoS), 2017)
    Brain activity displays a large repertoire of dynamics across the sleep-wake cycle and even during anesthesia. It was suggested that criticality could serve as a unifying principle underlying the diversity of dynamics. ...
  • Deco, Gustavo; He, Biyu J.; Ponce-Alvarez, Adrián; Hagmann, Patric (Public Library of Science (PLoS), 2015)
    How a stimulus or a task alters the spontaneous dynamics of the brain remains a fundamental open question in neuroscience. One of the most robust hallmarks of task/stimulus-driven brain dynamics is the decrease of variability ...
  • Ponce-Alvarez, Adrián; Jouary, Adrien; Privat, Martin; Deco, Gustavo; Sumbre, Germán (Elsevier, 2018)
    Previous studies suggest that the brain operates at a critical point in which phases of order and disorder coexist, producing emergent patterned dynamics at all scales and optimizing several brain functions. Here, we ...

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