bioRxiv (Cold Spring Harbor Laboratory)
July 10, 2026
Joseph Giorgio, Thomas Morin, Hsiang-Yu Chen et al.
preprint
Throughout the preclinical phase of Alzheimer's disease (AD) β-amyloid (Aβ) accumulates preferentially within the default mode network (DMN), yet the functional and behavioural consequences of this pathological burden remain poorly understood. Using task-based fMRI combined with Aβ, tau, and dopamine PET in cognitively normal older adults, we show that Aβ burden impairs learning independent of...
Neuron
December 1, 2023
Joseph Giorgio, Jenna N. Adams, A. Maass et al.
In early Alzheimer's disease (AD) β-amyloid (Aβ) deposits throughout association cortex and tau appears in the entorhinal cortex (EC). Why these initially appear in disparate locations is not understood. Using task-based fMRI and multimodal PET imaging, we assess the impact of local AD pathology on network-to-network interactions. We show that AD pathologies flip interactions between the...
Cell Reports
August 29, 2023
Eli J Müller, Brandon R Munn, Michelle J. Redinbaugh et al.
The neurobiological mechanisms of arousal and anesthesia remain poorly understood. Recent evidence highlights the key role of interactions between the cerebral cortex and the diffusely projecting matrix thalamic nuclei. Here, we interrogate these processes in a whole-brain corticothalamic neural mass model endowed with targeted and diffusely projecting thalamocortical nuclei inferred from...
Preprints.org
July 21, 2023
Fran Hancock, Fernando E. Rosas, Mengsen Zhang et al.
16 citations
preprint
Healthy brain functioning depends on balancing stable integration between brain areas for effective coordinated functioning, with bursts of desynchronisation to allow subsystems to reconfigure and express functional specialisation. Metastability, a concept originated in statistical physics and dynamical systems theory, has been proposed as a key signature that characterises this balance....
Elife
May 25, 2023
Godber M Godbersen, Sebastian Klug, Wolfgang Wadsak et al.
External tasks evoke characteristic fMRI BOLD signal deactivations in the default mode network (DMN). However, for the corresponding metabolic glucose demands both decreases and increases have been reported. To resolve this discrepancy, functional PET/MRI data from 50 healthy subjects performing Tetris were combined with previously published data sets of working memory, visual and motor...
Current Biology
October 8, 2018
Johan Van der Meer, Michael Breakspear
A receptor map of serotonin distribution is integrated into a model of the dynamic activity of the brain under the effects of LSD. The approach opens new avenues to understand experimental manipulations of healthy brain activity and offers a novel drug-discovery platform.