1. Neuronal avalanches now have their own chapter in the Encyclopedia of Computational Neuroscience as distinct dynamics of the brain in addition to waves and oscillations. Plenz D, Shew WL (2018) Neuronal Avalanches, in Encyclopedia of Computational Neuroscience. Jaeger D, Jung R, eds. https://doi.org/10.1007/978-1-4614-7320-6_743-4 2. We demonstrated for the first time that avalanche dynamics govern brain activity in human infants. This introduces avalanches as the normal brain activity in human infants. The finding paves the way for avalanche dynamics as a potential biomarker for early developmental brain defects. Jannesari M, Saeedi A, Zare M, Ortiz-Mantilla S, Plenz D, Benasich AA (2019) Stability of neuronal avalanches and long-range temporal correlations during the first year of life in human infant. Brain Struct Funct, in press. 3. We demonstrated for the first time that sensory stimulation induces avalanches in the brain. This was done using brief tones to elicited neuronal responses in the auditory cortex of passively listening mice. This work used advanced 2-photon imaging and demonstrates for the first time that layer 4, the first cortical stage of auditory inputs to cortex already translates auditory inputs into avalanches. The finding that both associative cortical layers (layer 2/3) as well as the input layer 4 exhibit avalanche dynamics is in line with prediction from theory, which state that networks optimize their communications when exhibiting avalanches. This work was done in collaboration based on our U01 NS90569-01 BRAIN initiative Grant with Dr. Patrick Kanold. Bowen Z, Winkowski D, Seshadri SR, Plenz D, Kanold P (2019) Neuronal avalanches in input and associative layers of auditory cortex. Frontiers in Systems Neuroscience, in press. 4. In our ongoing collaboration with Peter Basser (NICHD) we demonstrated that neuronal activity can be measured by assessing the active transmembrane water cyclilng using magnetic resonance (MR) without relying on a BOLD signal. Bai R, Springer CS, Plenz D, Basser PJ (2019). Brain active transmembrane water cycling measured by MR is associated with neuronal activity. Magn Reson Med 81, 1280-1295. https://doi.org/10.1002/mrm.27473

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18
Fiscal Year
2019
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U.S. National Institute of Mental Health
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Seshadri, Saurav; Klaus, Andreas; Winkowski, Daniel E et al. (2018) Altered avalanche dynamics in a developmental NMDAR hypofunction model of cognitive impairment. Transl Psychiatry 8:3
Bai, Ruiliang; Springer Jr, Charles S; Plenz, Dietmar et al. (2018) Fast, Na+ /K+ pump driven, steady-state transcytolemmal water exchange in neuronal tissue: A study of rat brain cortical cultures. Magn Reson Med 79:3207-3217
Meisel, Christian; Klaus, Andreas; Vyazovskiy, Vladyslav V et al. (2017) The Interplay between Long- and Short-Range Temporal Correlations Shapes Cortex Dynamics across Vigilance States. J Neurosci 37:10114-10124
Yu, Shan; Ribeiro, Tiago L; Meisel, Christian et al. (2017) Maintained avalanche dynamics during task-induced changes of neuronal activity in nonhuman primates. Elife 6:
Meisel, Christian; Bailey, Kimberlyn; Achermann, Peter et al. (2017) Decline of long-range temporal correlations in the human brain during sustained wakefulness. Sci Rep 7:11825
Klaus, Andreas; Plenz, Dietmar (2016) A Low-Correlation Resting State of the Striatum during Cortical Avalanches and Its Role in Movement Suppression. PLoS Biol 14:e1002582
Bai, Ruiliang; Stewart, Craig V; Plenz, Dietmar et al. (2016) Assessing the sensitivity of diffusion MRI to detect neuronal activity directly. Proc Natl Acad Sci U S A 113:E1728-37
Lombardi, F; Herrmann, H J; Plenz, D et al. (2016) Temporal correlations in neuronal avalanche occurrence. Sci Rep 6:24690
Meisel, Christian; Plenz, Dietmar; Schulze-Bonhage, Andreas et al. (2016) Quantifying antiepileptic drug effects using intrinsic excitability measures. Epilepsia 57:e210-e215
Bellay, Timothy; Klaus, Andreas; Seshadri, Saurav et al. (2015) Irregular spiking of pyramidal neurons organizes as scale-invariant neuronal avalanches in the awake state. Elife 4:e07224

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