Summary: Researchers have identified a previously unrecognized class of traveling brain waves that rotate through space and time. The study shows these spiral, vortex-like waves are driven by a fixed circular arrangement of neurons in the somatosensory cortex and coordinate activity across large-scale brain networks.
Operating across broad brain regions, these rotating waves synchronize activity between the hemispheres, link sensory and motor networks, and entrain spiking in subcortical structures—functioning as a spatiotemporal clock to sequence sensation, enable prediction, and help organize voluntary action.
Key Facts
- Discovery of Spiral Waves: A new class of traveling brain waves was observed that physically rotate across the cortical surface in spiral patterns.
- Circular, “Merry-Go-Round” Wiring: The waves follow a distinctive anatomical circuit in the somatosensory cortex where axons are arranged in a circular layout, guiding the rotating propagation.
- Cross-Network Coordination: These vortex-like waves cross functional boundaries, mirror between left and right hemispheres, and connect sensory areas to motor cortex and deeper subcortical regions.
- Behaviorally Triggered: A gentle air puff to a mouse’s whiskers elicited a rapid sequence of clockwise rotating waves; the waves’ shape and timing shifted with the animal’s arousal and task performance.
- Spatiotemporal Clock Hypothesis: The researchers propose these streaming waves act as a neural clock that sequences sensation then action, aiding prediction and consolidating sensorimotor skills.
Source: Washington University
Spiraling waves of neural activity travel across the brain, and scientists are investigating whether these rotating dynamics coordinate perception, memory formation, and motor control.
“We discovered a new kind of brain wave that specifically rotates over space and time, depends on a circular anatomical circuit in the sensory cortex, and influences activity across the brain,” said Nick Steinmetz, associate professor of neurobiology and biophysics at the University of Washington School of Medicine in Seattle. His team led the research.
The detailed description of these traveling spiral waves, along with measurements of their behavior-linked activity in mice, is reported in the journal Science.
The researchers focused on how the brain’s anatomical wiring shapes both the generation and movement of the waves. The rotating patterns most often originate in the somatosensory cortex, the region that maps touch, body position, and proprioceptive cues.
Neurons that give rise to the rotating waves are organized in a merry-go-round–like pattern within the sensory cortex: their axons form a physical circular layout. This fixed architecture, analogous to rail cars on a circular track, naturally channels electrical propagation into a spiral motion across the cortical surface.
Rotating waves appeared symmetrically in both hemispheres and coordinated activity between sensory and motor cortices. The team also found that phase-timed spiking occurred in deeper structures—such as the thalamus, striatum, and midbrain—showing that these waves influence both cortical and subcortical processing.
Because the spiral waves travel across distinct brain regions, they could provide a mechanism for sharing time-locked information among systems responsible for complementary functions. In particular, coordinated waves spanning sensory and motor areas may support the timing and sequencing required for directed movement and environmental interaction.
The experiments combined cortex-wide, fast imaging of neural activity with large-scale electrophysiological recordings in deeper brain regions. A brief air puff to a mouse’s left whiskers reliably evoked a cascade of clockwise rotating waves across the right somatosensory cortex, with concurrent activity in motor cortex. In a visual-motor task rewarded with water, the presence and shape of rotating waves varied with the animal’s arousal level and whether it performed the task correctly.
While these results establish rotating waves as prominent and behaviorally relevant features in mice, the researchers caution that the extent to which similar global coordination occurs in other species, including humans, remains to be determined.
Functionally, the team suggests rotating waves may operate as space-and-time clocks that organize the sequence from sensation to action and help reinforce sensorimotor connections through experience. By streaming across multiple areas, these waves could enable the brain to predict upcoming sensory inputs and align motor responses accordingly.
First author Zhiwen Ye will establish his own lab at the Institute of Neuromodulation and Cognition in Shenzhen, China.
Funding: The work was supported by a National Science Foundation CAREER award, the Pew Biomedical Scholars Program, Klingenstein-Simons Fellowship in Neuroscience, the NIH BRAIN Initiative (U19MH114830), the Washington Research Foundation, and support from the National Eye Institute.
Key Questions Answered:
A: The waves propagate by following a distinct circular arrangement of neurons in the somatosensory cortex. Axons in this region are organized in a continuous, round pattern that directs the electrical signals along a rotating path, producing spiral waves that sweep across cortical maps.
A: The waves provide temporal coordination across networks. Originating in sensory cortex, they stream into motor areas, mirror between hemispheres, and align with spiking in subcortical hubs like the thalamus and striatum, enabling distinct brain systems to share synchronized information.
A: The waves vary with arousal and task performance and consistently traverse multiple regions in a timed sequence. These properties suggest they can set the order and timing of sensory processing and subsequent motor responses, effectively acting as a spatiotemporal scaffold for perception and action.
Editorial Notes:
- This article was edited by a Neuroscience News editor.
- The journal paper was reviewed in full by the editorial team.
- Additional context was added by staff to clarify methods and implications.
About this neuroscience research news
Author: Leila Gray
Source: University of Washington
Contact: Leila Gray – University of Washington
Image: Image credited to Neuroscience News
Original Research: Open access. “Brainwide topographic coordination of rotating waves” by Ye Z, Ladd AE, MacKenzie N, Kolich L, Li AJ, Birman D, Bull MS, Daigle TL, Tasic B, Zeng H, Steinmetz NA. Science. DOI: 10.1126/science.adx1369
Abstract
Brainwide topographic coordination of rotating waves
INTRODUCTION
Electrical activity in the brain commonly propagates as waves across neural networks, and these patterns have been linked to perception, memory, and movement. However, how wave spatial organization relates to underlying anatomical circuits and how such waves are coordinated across the whole brain have been uncertain. Clarifying these relationships is essential to understanding the role of traveling waves in behavior and cognition.
RATIONALE
The study combined fast, large-scale imaging of cortical activity in mice with high-density electrode recordings in subcortical regions. This approach tracked traveling waves across the cortex while recording spiking in structures such as the thalamus, striatum, and midbrain. The researchers also reconstructed axonal projections in three dimensions, tested causal roles of local circuits, and measured how wave occurrence varied with brain state and behavior.
RESULTS
The team found that rotating waves—propagating along circular trajectories—are common across cortex and are centered primarily on the somatosensory region, sweeping sequentially across body maps. Local neuronal wiring matches this circular geometry, and computational modeling supports that this architecture produces rotating waves. Across the cortex, rotating patterns were mirrored between hemispheres and between sensory and motor areas, reflecting long-range connectivity. Disrupting local somatosensory circuits reduced rotating activity in motor cortex. Subcortical neurons tracked cortical rotating waves in their spiking. Rotating waves were modulated by arousal, evoked by sensory stimuli, and selectively engaged during correct task performance.
CONCLUSION
These results show that the brain’s physical wiring can shape activity into coordinated rotating waves that span cortical and subcortical regions. Rather than being confined to isolated areas, these rotating dynamics form a distributed organizational principle in which axonal geometry determines the direction and timing of activity propagation. The recruitment of rotating waves across behavioral contexts suggests they may coordinate information flow between sensory and motor systems during perception and action.