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Neurosciences
Xiaoxu Fan, Qiang Guo, Xinxin Zhang, Lingxia Fei, Sheng He, Xuchu Weng
Summary: This study reveals the neural mechanism of familiar face perception by recording intracranial electrophysiological signals. The findings suggest that familiarity enhances face representations after initial extraction and viewing familiar faces increases coupling between different brain areas.
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Behavioral Sciences
Maria J. S. Guerreiro, Ramesh Kekunnaya, Brigitte Roeder
Summary: Early visual experience is crucial for the development of visual and multisensory functions. This study found that early visual deprivation partially disrupts visual cortical processing of motion stimuli, but does not affect top-down attentional modulation.
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Neurosciences
Adam Pines, Arielle S. Keller, Bart Larsen, Maxwell Bertolero, Arian Ashourvan, Dani S. Bassett, Matthew Cieslak, Sydney Covitz, Yong Fan, Eric Feczko, Audrey Houghton, Amanda R. Rueter, Manish Saggar, Golia Shafiei, Tinashe M. Tapera, Jacob Vogel, Sarah M. Weinstein, Russell T. Shinohara, Leanne M. Williams, Damien A. Fair, Theodore D. Satterthwaite
Summary: This study tracks cortical activity propagations using advanced neuroimaging and computer vision techniques in a large sample of youth (n = 388), showing that top-down cortical propagations become more prevalent with greater demands for cognitive control as well as with development in youth.
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Neurosciences
Viktoria K. Vereczki, Kinga Muller, Eva Krizsan, Zoltan Mate, Zsuzsanna Fekete, Laura Rovira-Esteban, Judit M. Veres, Ferenc Erdelyi, Norbert Hajos
Summary: Our study using unbiased stereology found a higher ratio of GABAergic neurons in the basal nucleus compared to the lateral nucleus. There was no difference in the ratio of GABAergic neurons between the right and left hemispheres in both male and female mice. Various types of GABAergic cells, including axo-axonic cells, basket cells, dendrite-targeting inhibitory cells, NPY-containing neurogliaform cells, interneuron-selective interneurons, and GABAergic projection neurons, were identified to compose the majority of GABAergic cells in these nuclei.
JOURNAL OF NEUROSCIENCE
(2021)
Article
Neurosciences
Martin Field, Istvan P. Lukacs, Emily Hunter, Richard Stacey, Puneet Plaha, Laurent Livermore, Olaf Ansorge, Peter Somogyi
Summary: The study found that specific types of interneurons in the human neocortex, such as rosehip cells and layer 2-3 innervating cells, exhibit larger tonic GABA(A) receptor currents compared to other interneuron types, potentially allowing for selective modulation of cortical circuitry. Patient parameters like age, seizures, cancer type, and anticonvulsant treatment were also examined for their potential influence on tonic inhibitory currents in human neurons.
JOURNAL OF NEUROSCIENCE
(2021)
Article
Computer Science, Artificial Intelligence
Maria Kon, Gregory Francis
Summary: A fundamental characteristic of human visual perception is the ability to group disparate elements together. Understanding the mechanisms behind this grouping can enhance machine vision algorithms, as grouping plays a crucial role in various visual phenomena.
Article
Neurosciences
Jochem van Kempen, Marc A. Gieselmann, Michael Boyd, Nicholas A. Steinmetz, Tirin Moore, Tatiana A. Engel, Alexander Thiele
Summary: Fluctuations in cortical excitability affect sensory processing and behavior. These fluctuations are coordinated across different brain areas, with top-down attention enhancing this coordination. The degree of local state coordination between different areas can predict behavioral performance.
Article
Neurosciences
Aurelie Brecier, Melodie Borel, Nadia Urbain, Luc J. Gentet
Summary: GABAergic inhibitory neurons play a crucial role in regulating cortical circuit activity during the sleep/wake cycle. This study investigated the activity dynamics of PV, VIP, and SST neurons in the somatosensory cortex of sleeping mice. The findings revealed that PV neurons were most active during both REM and NREM sleep, VIP neurons were most active during REM sleep, and the overall activity of SST neurons remained stable throughout the sleep/wake cycle. Furthermore, the study found that ongoing delta and theta oscillations influenced the activity of most neurons, except for SST neurons.
JOURNAL OF NEUROSCIENCE
(2022)
Article
Multidisciplinary Sciences
Valentina Bianco, Eleonora Arrigoni, Francesco Di Russo, Leonor Josefina Romero Lauro, Alberto Pisoni
Summary: The Bereitschaftspotential (BP) is a scalp potential that increases slowly over the fronto-central regions as action execution approaches. This study used TMS evoked-potentials (TEP) to stimulate the supplementary motor area (SMA) and found that the reactivity of the left SMA was greater when approaching the peak of BP. Additionally, the effective connectivity of the left SMA increased with the left occipital areas and decreased with the right inferior frontal gyrus, indicating a fast reconfiguration of cortical networks during action preparation.
Editorial Material
Neurosciences
Matthew T. Colonnese, Yasunobu Murata, Marnie A. Phillips
Summary: The study reveals the rules governing top-down connections on visual cortical layer 1 interneurons, highlighting activity-dependent cooperative interactions specific to neurogliaform cells and the anterior cingulate cortex.
Article
Neurosciences
Anna Schroeder, M. Belen Pardi, Joram Keijser, Tamas Dalmay, Ayelen I. Groisman, Erin M. Schuman, Henning Sprekeler, Johannes J. Letzkus
Summary: This study combines various techniques such as synaptic two-photon calcium imaging, circuit mapping, cortex-dependent learning, and chemogenetics in mice to investigate the role of inhibitory top-down projections. The results show that GABAergic afferents from the subthalamic zona incerta play a major role in transmitting top-down input to the neocortex. This transmission undergoes plasticity during learning and contributes to information transfer and behavioral memory.
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Neurosciences
Alessandra Camassa, Andrea Galluzzi, Maurizio Mattia, Maria V. Sanchez-Vives
Summary: This study explores the network dynamics of Down states and identifies two complementary phases, a highly synchronized deterministic period and a low-synchronization stochastic period, that make up these states. The balance between these two phases determines the dynamical properties of Down states, as well as their responsiveness to incoming stimuli and refractory period.
JOURNAL OF NEUROSCIENCE
(2022)
Article
Anatomy & Morphology
Ildiko Piszar, Magor L. Lorincz
Summary: Serotonin, originating from the brainstem raphe nuclei, exerts dual control over neuronal activity in the primary olfactory cortex by suppressing principal neurons and exciting local interneurons. These findings have significant implications for sensory information processing and other functions in the olfactory cortex and related brain areas.
FRONTIERS IN NEUROANATOMY
(2022)
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Neurosciences
Julien Vezoli, Loic Magrou, Rainer Goebel, Xiao-Jing Wang, Kenneth Knoblauch, Martin Vinck, Henry Kennedy
Summary: The article discusses the hierarchical organization and function of the cortex, highlighting a principle of hierarchical distance within the cortex. It also explores the anatomical structure, functional hierarchy, and frequency-dependent Granger causality of inter-areal connectivity. Through statistical modeling and dynamical models, it reveals the complex structure and signal transmission mechanism of the cortex.
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Cell Biology
Sarah A. Stern, Estefania P. Azevedo, Lisa E. Pomeranz, Katherine R. Doerig, Violet J. Ivan, Jeffrey M. Friedman
Summary: The insular cortex plays a crucial role in regulating conditioned overconsumption in response to learned cues by controlling a specific circuit, which is active during feeding and suppresses satiety signals in the central amygdala.
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Multidisciplinary Sciences
Jorge F. Mejias, John D. Murray, Henry Kennedy, Xiao-Jing Wang
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Neurosciences
Madhura R. Joglekar, Jorge F. Mejias, Guangyu Robert Yang, Xiao-Jing Wang
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Computer Science, Artificial Intelligence
K. Bol, G. Marsat, J. F. Mejias, L. Maier, A. Longtin
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Physics, Multidisciplinary
J. F. Mejias, A. Longtin
PHYSICAL REVIEW LETTERS
(2012)
Article
Mathematical & Computational Biology
Jorge F. Mejias, Alexandre Payeur, Erik Selin, Leonard Maler, Andre Longtin
FRONTIERS IN COMPUTATIONAL NEUROSCIENCE
(2014)
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Mathematical & Computational Biology
Jorge F. Mejias, Andre Longtin
FRONTIERS IN COMPUTATIONAL NEUROSCIENCE
(2014)
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Biochemical Research Methods
Jorge F. Mejias, Gary Marsat, Kieran Bol, Leonard Maler, Andre Longtin
PLOS COMPUTATIONAL BIOLOGY
(2013)
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Neurosciences
Jorge Jaramillo, Jorge F. Mejias, Xiao-Jing Wang
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Cell Biology
Guido T. Meijer, Pietro Marchesi, Jorge F. Mejias, Jorrit S. Montijn, Carien S. Lansink, Cyriel M. A. Pennartz
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Multidisciplinary Sciences
Sander Lindeman, Sungho Hong, Lieke Kros, Jorge F. Mejias, Vincenzo Romano, Robert Oostenveld, Mario Negrello, Laurens W. J. Bosman, Chris De Zeeuw
Summary: The study investigated the activity and coherence between S1 and M1 cortices during whisker stimulation in awake mice, finding that optogenetic Purkinje cell stimulation can dynamically and functionally modulate sensorimotor cortex activity. Specifically, simultaneous activation of Purkinje cells and whiskers affected sensory responses and coherence in theta and gamma bands, highlighting the cerebellum's role in coordinating sensorimotor behavior.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Business, Finance
Luis Carlos Garcia del Molino, Iacopo Mastromatteo, Michael Benzaquen, Jean-Philippe Bouchaud
SIAM JOURNAL ON FINANCIAL MATHEMATICS
(2020)
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Physics, Multidisciplinary
Roberto R. Deza, Ignacio Deza, Nataniel Martinez, Jorge F. Mejias, Horacio S. Wio
FRONTIERS IN PHYSICS
(2019)
Article
Neurosciences
Alexandre Melanson, Jorge F. Mejias, James J. Jun, Leonard Maler, Andre Longtin