Unraveling Multiregional Neural Patterns during Consciousness Transition Using Flexible Microelectrode Arrays Integrated with Neuropixels Chips.
Xiangyu Wang, Mengcheng Liu, Jianfei Ding, Wen Gu, Huihui Tian, Ying Fang, Shouliang Guan, Jinfen Wang
Nano letters May 28, 2025 DOI: 10.1021/acs.nanolett.5c01662 (opens in new tab) via PubMed
Summary
AI-generated from the abstractA flexible microelectrode array system called FlexiPixels, which combines a multishank flexible array with Neuropixels chips, enables stable, long-term recording of neural activity across multiple brain regions in freely moving rats. Using this system, researchers tracked neuronal activity during consciousness transitions from anesthesia to wakefulness and subsequent sleep. Distinct state-dependent firing patterns emerged across different brain regions and neuronal types: CA1 neurons showed similar activity during wakefulness and sleep, while DG neurons exhibited unique sensitivity to anesthesia. The findings demonstrate the system's capability for stable multiregion recording and its potential to reveal region-specific signatures in consciousness studies.
Study at a glance
| Characteristics | Experimental study Peer reviewed |
|---|---|
| Population | Freely moving rats |
| Keywords | Consciousness transitions Flexible microelectrode arrays Microfabrication Neuronal activity recording Neuroscience |
| Key finding | FlexiPixels enables stable multiregion neural recording in freely moving rats, revealing distinct state-dependent firing patterns across brain regions during consciousness transitions. |
Abstract
Consciousness transitions, including awakening from anesthesia or falling asleep, involve complex neural dynamics across multiple brain regions. Understanding these transitions requires simultaneous and stable monitoring of large-scale neural activity in freely moving animals. Here, a flexible microelectrode array system (FlexiPixels probe) is demonstrated that integrates a multishank flexible microelectrode array with Neuropixels chips. This lightweight FlexiPixels probe enables stable and long-term neural signal recording across multiple brain regions in freely moving rats and tracking of neuronal activities during consciousness transitions from anesthesia to wakefulness and subsequent sleep states. Distinct state-dependent firing patterns emerge across different brain regions and neuronal types. CA1 neurons show similar activity during wakefulness and sleep, while DG neurons exhibit unique anesthesia sensitivity. These findings demonstrate FlexiPixels' capabilities for stable multiregion neural recording in freely moving animals and potential to unravel region-specific signatures in consciousness studies.