Single-neuron firing cascades underlie global spontaneous brain events

Xiao Liu, David A. Leopold, Yifan Yang

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The resting brain consumes enormous energy and shows highly organized spontaneous activity. To investigate how this activity is manifest among single neurons, we analyzed spiking discharges of ∼10,000 isolated cells recorded from multiple cortical and subcortical regions of the mouse brain during immobile rest. We found that firing of a significant proportion (∼70%) of neurons conformed to a ubiquitous, temporally sequenced cascade of spiking that was synchronized with global events and elapsed over timescales of 5 to 10 s. Across the brain, two intermixed populations of neurons supported orthogonal cascades. The relative phases of these cascades determined, at each moment, the response magnitude evoked by an external visual stimulus. Furthermore, the spiking of individual neurons embedded in these cascades was time locked to physiological indicators of arousal, including local field potential power, pupil diameter, and hippocampal ripples. These findings demonstrate that the large-scale coordination of low-frequency spontaneous activity, which is commonly observed in brain imaging and linked to arousal, sensory processing, and memory, is underpinned by sequential, large-scale temporal cascades of neuronal spiking across the brain.

Original languageEnglish (US)
Article numbere2105395118
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number47
StatePublished - Nov 23 2021

All Science Journal Classification (ASJC) codes

  • General


Dive into the research topics of 'Single-neuron firing cascades underlie global spontaneous brain events'. Together they form a unique fingerprint.

Cite this