Author: Equipe éditoriale

Emotions play a fundamental role in modulating brain activity and influencing perception, cognition, and action. However, the underlying connectivity mechanisms associated with different emotional states remain poorly understood. The objective of this study is to investigate human brain connectivity in response to emotional stimuli of happiness, anger, sadness, fear, and neutral stimuli, using electroencephalogram (EEG) … Continue reading Poster 2024#15 – Cintia Ferreira da Silva – Emotions and Brain Connectivity: Phase, Coherence, and Directionality

The hypothesis that the brain operates near criticality explains observations of complex, often scale-invariant, neural activity. However, the brain is not static– its dynamical state varies depending on what an organism is doing. Neurons often become more synchronized (ordered) during unconsciousness and more desynchronized (disordered) in highly active awake conditions. Are all these states equidistant … Continue reading Poster 2024#8 – Sam Sooter – Cortex deviates from criticality during action and deep sleep: a temporal renormalization group approach

Recent advances in human intracranial recordings have significantly deepened our understanding of complex cognitive functions like working memory (WM) at the circuit level. While single-neuron analyses, primarily within the medial temporal lobes, have elucidated how individual neurons contribute to memory computation, the role of local field potential (LFP) dynamics in complementing single-unit activity during WM … Continue reading Poster 2024#7 – Renée Tung – Inhibitory circuit synchronization drives working memory dynamics

Predictive coding suggests that the brain minimizes free energy through the accurate prediction of sensory stimuli. While not mathematically identical, some research has suggested that information content of a brain signal can act as a proxy for free energy. Measures such as Shannon’s entropy and Shannon’s entropy rate may therefore be combined with experimental paradigms … Continue reading Poster 2024#6 – Michael Angyus – A spike in entropy precedes the mismatch negativity: linking entropy and prediction error

Working memory is the process through which information is held in mind temporarily. To achieve this neural representations of the data must persist while the information is being held in mind. However, these representations cannot be held in mind indefinitely. Instead, they must be flexible enough to switch between different pieces of information. Here we … Continue reading Poster 2024#5 – Jacob Barfield – Working memory and flexibility are balanced near criticality

The critical brain hypothesis posits that neural systems operate near a critical phase transition, potentially optimizing computation and information processing. However, the precise relationship between criticality and performance in living systems remains a mystery. In this companion study to "Neuronal Scaling in the Mouse Visual Cortex During a Visual Recognition Task," we extend our investigation … Continue reading Poster 2024#4 – Gustavo Gama Cambrainha – With or without scaling? Exploring criticality across brain areas during task performance

The brain is tuned to operate near a critical phase transition between disordered and ordered states by control parameters such as the balance between functionally excitatory and inhibitory neurotransmission. Deviations from this balance are linked to multiple brain disorders making the emergent dynamics a potential mechanistic biomarker. Indeed, neurophysiological biomarkers appear promising for applications in … Continue reading Poster 2024#3 – Alina Suleimanova – Phenotype discovery using personalized generative whole-brain modeling

Whole-brain computational modeling has become increasingly important for understanding the systems-level mechanisms governing the dynamics of large-scale brain activity. Brain dynamics, characterized by synchronization and criticality of neuronal oscillations, are fundamental to cognitive functions. The remarkable inter-individual variability in observables neuronal synchronization dynamics in vivo has been attributed to both individual operating point locations in … Continue reading Poster 2024#2 – Vladislav Myrov – Hierarchical whole-brain modeling of critical synchronization dynamics in human brain

In the brain, synchronous activity is detected as oscillations at different frequencies. Experimental data from the hippocampus and neocortex link Phase-Amplitude Cross Frequency Coupling (PAC), where the amplitude of fast gamma oscillations aligns with the phase of slower theta/alpha waves, to cognitive functions like attention, learning and navigation. Traditionally, this mechanism was thought to be … Continue reading Poster 2024#1 – Dimitrios Chalkiadakis – The connectivity of minimal neuronal motifs could explain gamma-leading theta interactions in recordings of synchronous neural activity