Critical-like brain dynamics in a continuum from second-to first-order phase transition

SH Wang, F Siebenhühner, G Arnulfo, V Myrov… - Journal of …, 2023 - jneurosci.org
The classic brain criticality hypothesis postulates that the brain benefits from operating near
a continuous second-order phase transition. Slow feedback regulation of neuronal activity …

Rhythmicity of neuronal oscillations delineates their cortical and spectral architecture

V Myrov, F Siebenhühner, JJ Juvonen… - Communications …, 2024 - nature.com
Neuronal oscillations are commonly analyzed with power spectral methods that quantify
signal amplitude, but not rhythmicity or 'oscillatoriness' per se. Here we introduce a new …

Tracking the distance to criticality in systems with unknown noise

B Harris, LL Gollo, BD Fulcher - Physical Review X, 2024 - APS
Many real-world systems undergo abrupt changes in dynamics as they move across critical
points, often with dramatic and irreversible consequences. Much existing theory on …

Neuronal synchrony and critical bistability: Mechanistic biomarkers for localizing the epileptogenic network

SH Wang, G Arnulfo, L Nobili, V Myrov, P Ferrari… - …, 2024 - Wiley Online Library
Objective Postsurgical seizure freedom in drug‐resistant epilepsy (DRE) patients varies from
30% to 80%, implying that in many cases the current approaches fail to fully map the …

[HTML][HTML] EEG spectral attractors identify a geometric core of brain dynamics

P Pourdavood, M Jacob - Patterns, 2024 - cell.com
Multidimensional reconstruction of brain attractors from electroencephalography (EEG) data
enables the analysis of geometric complexity and interactions between signals in state …

Emergence of metastability in frustrated oscillatory networks: the key role of hierarchical modularity

E Caprioglio, L Berthouze - Frontiers in Network Physiology, 2024 - frontiersin.org
Oscillatory complex networks in the metastable regime have been used to study the
emergence of integrated and segregated activity in the brain, which are hypothesised to be …

Role of homeostatic plasticity in critical brain dynamics following focal stroke lesions

RP Rocha, M Zorzi, M Corbetta - Scientific Reports, 2024 - nature.com
Can focal brain lesions, such as those caused by stroke, disrupt critical brain dynamics?
What biological mechanisms drive its recovery? In a recent study, we showed that focal …

Chaotic nature of the electroencephalogram during shallow and deep anesthesia: From analysis of the Lyapunov exponent

K Hayashi - Neuroscience, 2024 - Elsevier
In conscious states, the electrodynamics of the cortex are reported to work near a critical
point or phase transition of chaotic dynamics, known as the edge-of-chaos, representing a …

[HTML][HTML] Altered long-range functional connectivity in PTSD: Role of the infraslow oscillations of cortical activity amplitude envelopes

M Popescu, EA Popescu, TJ DeGraba… - Clinical …, 2024 - Elsevier
Objective Coupling between the amplitude envelopes (AEs) of regional cortical activity
reflects mechanisms that coordinate the excitability of large-scale cortical networks. We used …

Cortex deviates from criticality during action and deep sleep: a temporal renormalization group approach

JS Sooter, AJ Fontenele, C Ly, AK Barreiro, WL Shew - bioRxiv, 2024 - biorxiv.org
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 …