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Related Experiment Video

Updated: Jan 20, 2026

Chronic Cranial Window Technique for Repeated Cortical Recordings During Anesthesia in Pigs
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The Optically Guided and Pre-assembled Implantation Cranial Window Reveals Cortical Spatial Representations during

Weihao Zhao1,2,3,4,5,6, Lin Gao7, Yu Wu1,2,3,4,5

  • 1Senior Department of Otolaryngology Head and Neck Surgery, The 6th Medical Center of Chinese PLA General Hospital, Chinese PLA Medical School, Beijing 100853, China.

Research (Washington, D.C.)
|January 19, 2026
PubMed
Summary

We developed a new cranial window technique, optically guided and pre-assembled implantation (OGPI), for long-term neural imaging in freely behaving animals. This method enables chronic large-scale imaging and reveals widespread spatial information representation in the cortex.

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Area of Science:

  • Neuroscience
  • Neuroimaging
  • Surgical Techniques

Background:

  • Head-mounted miniaturized microscopes offer advanced neural imaging in freely behaving animals.
  • Reliable cranial window designs are crucial for the long-term application of these microscopes.

Purpose of the Study:

  • To introduce a standardized, cost-effective, and compatible cranial window technique for head-mounted miniaturized microscope imaging.
  • To enable precise implantation for chronic, large-scale neural imaging in freely behaving animals.

Main Methods:

  • Developed and implemented optically guided and pre-assembled implantation (OGPI), a novel cranial window technique.
  • Assessed the compatibility of OGPI with miniaturized microscopes and its adaptability for semiautomated or manual operation.
  • Conducted behavioral assessments to evaluate locomotor and spatial cognitive abilities in animals with OGPI windows.
  • Performed large-scale cortical imaging in mice during a Y-maze navigation task.

Main Results:

  • OGPI supports chronic large-scale neural imaging for over 8 months with preserved animal behavior.
  • Neural tuning to position, path, and acceleration was observed in a "salt-and-pepper" pattern across cortices.
  • Identified neurons with conjunctive tuning to spatial information and linear acceleration.
  • Cortical activity decoded animal position and path accurately, indicating widespread spatial representation.

Conclusions:

  • OGPI is an enabling platform and methodological advancement for chronic imaging in freely behaving animals.
  • Revealed widespread cortical representation of spatial information, including acceleration-tuned neurons crucial for spatial signaling.
  • The study validates OGPI for robust, long-term in vivo neuroscience research.