Article
Neurosciences
Kaisu Lankinen, Seppo P. Ahlfors, Fahimeh Mamashli, Anna Blazejewska, Tommi Raij, Tori Turpin, Jonathan R. Polimeni, Jyrki Ahveninen
Summary: Invasive neurophysiological studies in nonhuman primates have shown different laminar activation profiles to auditory vs. visual stimuli in auditory cortices and adjacent polymodal areas. A study using 3D echo-planar imaging at 7 T found that the intracortical depth profiles of BOLD signals differed significantly for auditory vs. visual stimuli in auditory cortices, suggesting the involvement of sensory-specific feedforward and cross-sensory feedback influences.
HUMAN BRAIN MAPPING
(2023)
Article
Biochemical Research Methods
Sevada Hovsepyan, Itsaso Olasagasti, Anne-Lise Giraud
Summary: Natural speech perception requires coordinating bottom-up and top-down information flows, and beta oscillations can achieve optimal results. This is important for speech processing, but may also apply to other cognitive processes.
PLOS COMPUTATIONAL BIOLOGY
(2023)
Article
Physics, Fluids & Plasmas
Leonardo Dalla Porta, Daniel M. Castro, Mauro Copelli, Pedro Carelli, Fernanda S. Matias
Summary: Studies suggest that brain signals exert bottom-up and top-down influences through distinct frequency bands, with theoretical models proposed for reproducing these effects. A simple two-network motif using spiking-neuron models and chemical synapses can exhibit feedforward and feedback influences through different frequency bands, allowing for directed influences to be studied at both the population and cellular levels.
Article
Cell Biology
Yiheng Hu, Qing Yu
Summary: The study investigates the spatiotemporal dynamics of self-generated imagery using electroencephalography and functional magnetic resonance imaging. The results show overlapping neural signatures of cue-induced and self-generated imagery but with significantly different sensitivities to the two types of imagery.
Article
Multidisciplinary Sciences
Demetrio Ferro, Jochem van Kempen, Michael Boyd, Stefano Panzeri, Alexander Thiele
Summary: The study revealed how visual information flows between cortical layers within and between macaque brain areas V1 and V4, showing dominance of information flow in certain directions and layers based on attentional modulation. Low-frequency communication was stronger from V4 to V1, with little layer specificity, while gamma-band communication was stronger in the feedforward direction. Attention decreased communication within V1 layers but increased communication within V4 and from V1 to V4 across all frequencies, showing that top-down cognitive processes play a role in modulating communication in the brain.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Biochemical Research Methods
Junhao Liang, Changsong Zhou
Summary: This study investigates the stimulus-response dynamics of biologically plausible excitation-inhibition balanced networks. The findings reveal that networks around critical synchronous transition states exhibit strong internal variability and are sensitive to external stimuli. Applying a stimulus to the network can alter the network's oscillatory frequency while maintaining the dynamical criticality.
PLOS COMPUTATIONAL BIOLOGY
(2022)
Article
Multidisciplinary Sciences
Ece Sakalar, Thomas Klausberger, Balint Lasztoczi
Summary: Effective communication across brain areas requires distributed neuronal networks to synchronize or decouple their activity. GABAergic interneurons not only lock the ensembles to oscillations, but also synchronize the firing of pyramidal cells with cortical inputs without reducing their activity. The temporary disengagement of synchrony allows for new communication partners.
Article
Biology
Fu Zeng, Adam Zaidel, Aihua Chen, Christopher R. Fetsch
Summary: The adult brain shows remarkable plasticity by recalibrating its perceptual estimates based on information from multiple sensory sources. In this study, single-neuron activity was recorded in monkeys' brains, revealing that early multisensory cortices participate in unsupervised recalibration, while the VIP area reflects a global shift in vestibular space.
Article
Multidisciplinary Sciences
Adeeti Aggarwal, Connor Brennan, Jennifer Luo, Helen Chung, Diego Contreras, Max B. Kelz, Alex Proekt
Summary: Sensory processing involves interaction between various brain regions through feedforward and feedback signaling. This study demonstrates that visual stimuli elicit traveling waves of activity in awake mice, with 30-50 Hz feedforward waves originating in the primary visual cortex and propagating forward, while 3-6 Hz feedback waves originate in the association cortex and propagate backward. The phase of the feedback wave modulates the amplitude of the feedforward wave and synchronizes firing across different cortical areas.
NATURE COMMUNICATIONS
(2022)
Article
Biology
Takeshi Otsuka, Yasuo Kawaguchi
Summary: The study shows that manipulation of specific pyramidal cell subtypes in the motor cortex has a significant impact on cortical network activity, with PT cell-dependent oscillatory activity playing an important role in motor learning.
COMMUNICATIONS BIOLOGY
(2021)
Article
Neurosciences
Kirstie J. Salinas, Carey Y. L. Huh, Jack H. Zeitoun, Sunil P. Gandhi
Summary: This study investigates the impact of binocular visual input on the functional differentiation of visual cortical areas, finding that imbalanced binocular vision during development affects the spatiotemporal tuning of neurons in V1, LM, and PM, and reshapes the tuning properties driven by the two eyes. Results reveal that balanced binocular vision is essential for driving the functional differentiation of visual cortical areas during development.
JOURNAL OF NEUROSCIENCE
(2021)
Article
Neurosciences
Anna-Lisa Schuler, Giulio Ferrazzi, Nigel Colenbier, Giorgio Arcara, Francesco Piccione, Florinda Ferreri, Daniele Marinazzo, Giovanni Pellegrino
Summary: This study investigates the relationship between cortical thickness and gamma synchrony in the brain. The results show a significant positive correlation between cortical thickness and gamma synchrony, indicating the involvement of underlying cell density in gamma circuitries. The findings contribute to the understanding of cortical functional and structural properties.
Article
Biology
Balbir Singh, Zhengyang Wang, Christos Constantinidis
Summary: During task execution, the power of gamma frequency in the local field potential (LFP) is influenced by cognitive variables. This study investigated whether such modulation only occurs after task rules are established. The results show that prefrontal gamma power emerges spontaneously, not necessarily tied to task execution, and is determined by the selectivity of neurons for stimulus information.
COMMUNICATIONS BIOLOGY
(2023)
Article
Neurosciences
Hunki Kwon, Sharif Kronemer, Kate L. Christison-Lagay, Aya Khalaf, Jiajia Li, Julia Z. Ding, Noah C. Freedman, Hal Blumenfeld
Summary: The study revealed changes in gamma power in multiple brain regions during the earliest stages of conscious visual perception, involving visual processing, language memory, and attention control, among others.
Article
Multidisciplinary Sciences
Placido Sciortino, Christoph Kayser
Summary: Previous studies have reported correlations between bodily self-illusions and rhythmic brain activity. This study quantifies the correlates of the rubber hand illusion in EEG-derived oscillatory brain activity and confirms the suppression of alpha and beta rhythms associated with the illusory state.
Article
Neurosciences
Mats W. J. van Es, Tom R. Marshall, Eelke Spaak, Ole Jensen, Jan-Mathijs Schoffelen
Summary: Sustained attention affects perception in a discrete, rhythmic way, with modulations of decoding performance by frequency-specific top-down brain activity, suggesting a potential link between attentional sampling rate and visual stimulus representation modulations in the brain, particularly in the frontoparietal attention network. However, the behavioral relevance of these effects remains to be established.
EUROPEAN JOURNAL OF NEUROSCIENCE
(2022)
Article
Neurosciences
Yue Sun, Georgios Michalareas, David Poeppel
Summary: The study revisited the impact of auditory entrainment and found that under certain conditions, entrainment affects auditory detection. However, no significant effects were revealed at the group level, indicating both the sensitivity of the task to oscillatory entrainment and substantial individual variability in performance.
EUROPEAN JOURNAL OF NEUROSCIENCE
(2022)
Article
Neurosciences
Britta U. Westner, Sarang S. Dalal, Alexandre Gramfort, Vladimir Litvak, John C. Mosher, Robert Oostenveld, Jan-Mathijs Schoffelen
Summary: This paper provides a unified documentation of the mathematical background and terminology for beamforming, compares beamformer implementations across different toolboxes, and discusses pitfalls and solutions in beamforming analysis.
Editorial Material
Neurosciences
Takuya Hayashi, Henry Kennedy, David C. Van Essen
Summary: The study used electrical microstimulation and functional MRI to map weighted orderly topographic relationships between cortical areas, revealing a spatially embedded large-scale organization that is likely to be functionally important.
Article
Multidisciplinary Sciences
Rinaldo D. D'Souza, Quanxin Wang, Weiqing Ji, Andrew M. Meier, Henry Kennedy, Kenneth Knoblauch, Andreas Burkhalter
Summary: The study identifies the hierarchical nature and nonhierarchical features of the mouse visual cortex network by evaluating the axonal projection patterns between different areas. Receptive field sizes in the cortex are generally consistent with the hierarchy. The results provide an anatomical metric for hierarchical distance and reveal both hierarchical and nonhierarchical motifs in the mouse visual cortex.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Florence Wianny, Kwamivi Dzahini, Karim Fifel, Charles Robert Eden Wilson, Agnieszka Bernat, Virginie Dolmazon, Pierre Misery, Camille Lamy, Pascale Giroud, Howard Michael Cooper, Kenneth Knoblauch, Emmanuel Procyk, Henry Kennedy, Pierre Savatier, Colette Dehay, Julien Vezoli
Summary: Parkinson's disease (PD) has a long and variable development process, and can cause various symptoms such as sleep and biological rhythm disorders. In a study using a monkey model of PD, neural precursor grafts were able to restore both motor and cognitive functions, and the degree of graft integration and striatal dopaminergic innervation correlated with the recovery.
Article
Neurosciences
Christina M. Vanden Bosch der Nederlanden, Marc F. Joanisse, Jessica A. Grahn, Tineke M. Snijders, Jan-Mathijs Schoffelen
Summary: Music is considered a beneficial tool for memory encoding and retention. This study found that neural tracking of syllable rhythms is influenced by familiarity with melodies. Familiarity had a significant effect on neural tracking when stimuli were grouped based on subjective ratings. Repetition, melodic simplicity, and individual differences were found to contribute to the perception of familiarity.
Article
Biology
Benjamin J. Stauch, Alina Peter, Isabelle Ehrlich, Zora Nolte, Pascal Fries
Summary: Researchers found that there was no significant difference in gamma oscillations in the early visual cortex between red and green stimuli based on a color coordinate system derived from responses of the lateral geniculate nucleus. Additionally, blue stimuli with contrast exclusively on the S-cone axis induced weak gamma responses, smaller event-related fields, and poorer change-detection performance. The strength of human color gamma responses for stimuli on the L-M axis could be well explained by L-M cone contrast and did not show a clear red bias when L-M cone contrast was properly equalized.
Article
Neurosciences
Francesca Carota, Jan-Mathijs Schoffelen, Robert Oostenveld, Peter Indefrey
Summary: Language production involves complex computations, and recent neuromagnetic evidence suggests simultaneous meaning-to-speech mapping. This study used MEG to investigate the neural signals of human subjects overtly naming objects and found that word length and phonological neighborhood density influence the time course of word production.
JOURNAL OF NEUROSCIENCE
(2022)
Article
Neurosciences
Sophie Slaats, Hugo Weissbart, Jan-Mathijs Schoffelen, Antje S. Meyer, Andrea E. Martin
Summary: This study examines the impact of sentence structure on low-frequency neural readouts. The results indicate that word frequency responses in the delta band are influenced by sentence context in terms of timing and location. Additionally, the presence of a sentence context determines the responsiveness of inferior frontal areas to lexical information. In conclusion, sentence structure affects the neural representation of words.
JOURNAL OF NEUROSCIENCE
(2023)
Article
Biochemical Research Methods
Eleni Psarou, Julien Vezoli, Marieke L. Schoelvinck, Pierre-Antoine Ferracci, Yufeng Zhang, Iris Grothe, Rasmus Roese, Pascal Fries
Summary: In this study, a long-lasting, modular, cement-free headpost implant made of titanium was developed. It consists of a baseplate and a top part, with the baseplate being implanted first and the percutaneous part added in a second surgery. A remote headposting technique was also developed to increase handling safety. The implant remained stable and healthy for at least 9 years, minimizing complications and improving animal welfare.
JOURNAL OF NEUROSCIENCE METHODS
(2023)
Article
Behavioral Sciences
Georgios Michalareas, Flor Kusnir, Gregor Thut, Joachim Gross
Summary: Grapheme-colour synaesthetes experience a form of perception where graphemes induce specific colour concurrents in their mind's eye. There are competing models for the neural mechanisms of synaesthesia, with one suggesting early recruitment of occipital colour areas and another suggesting later involvement of multisensory convergence zones and feedback to early visual areas. This study used MEG to examine the timing and anatomical correlates of synaesthetic percept in associator synaesthetes, finding evoked activity that supports the model of late synaesthesia-inducing activity.
Article
Psychology, Biological
Ashley Glen Lewis, Jan-Mathijs Schoffelen, Marcel Bastiaansen, Herbert Schriefers
Summary: There is a debate about whether beta power effects during sentence comprehension reflect syntactic unification operations or the maintenance of sentence-level representation. This study used magnetoencephalography to investigate beta power neural dynamics during the reading of relative clause sentences with initial ambiguity. The findings support the beta-maintenance hypothesis, showing decreased beta power for grammatical violations and object-relative clause conditions in left hemisphere language regions. The brain's error detection system also registers violations and unexpected interpretations.
Article
Linguistics
Julia Udden, Annika Hulten, Jan-Mathijs Schoffelen, Nietzsche Lam, Karin Harbusch, Antal van den Bosch, Gerard Kempen, Karl Magnus Petersson, Peter Hagoort
Summary: This study investigates the independence of sentence processing beyond single words and the network parts sensitive to syntactic complexity. The findings show that a left-hemisphere frontotemporoparietal network is supramodal and the left inferior frontal gyrus and the left posterior middle temporal gyrus are associated with different complexities. These findings have implications for neurobiological models of language processing.
NEUROBIOLOGY OF LANGUAGE
(2022)
Article
Linguistics
Eleanor Huizeling, Sophie Arana, Peter Hagoort, Jan-Mathijs Schoffelen
Summary: This study found that lexical frequency has an independent effect on word processing, while contextual constraints affect word-level brain responses. Lexical frequency and predictability may have independent influences in the early and late stages of word processing, and interact in the late stage.
NEUROBIOLOGY OF LANGUAGE
(2022)
