Related Experiment Video
Updated: May 14, 2026
Real-Time fMRI Brain Mapping in Animals
Published on: September 24, 2020
Functional connectivity fMRI in mouse brain at 7T using isoflurane
David N Guilfoyle1, Scott V Gerum, Jamie L Sanchez
1Center for Advanced Brain Imaging, Nathan Kline Institute, 140 Old Orangeburg Road, Orangeburg, NY 10962, USA. dguilfoyle@nki.rfmh.org
Abstract:
Although many resting state fMRI human studies have been published, the number of such rodent studies is considerably less. The reason for this is the severe technical challenge of high magnetic field small rodent imaging. Local magnetic field susceptibility changes at air tissue boundaries cause image distortion and signal losses. The current study reports measures of functional connectivity in mice using only isoflurane for the anesthetic. Because all anesthetic agents will alter cerebral blood flow and cerebral metabolism, the impact these changes have on neuronal connectivity has yet to be fully understood, however this work reports for the first time that reliable functional connectivity measures in mouse brain can be obtained with isoflurane.
Insights
Researchers achieved reliable functional connectivity measures in mouse brains using isoflurane anesthesia. This study overcomes technical challenges in small rodent imaging, advancing neuroscience research.
Area of Science:
- Neuroscience
- Magnetic Resonance Imaging (MRI)
Background:
- Resting-state functional MRI (fMRI) studies are common in humans but rare in rodents.
- High magnetic field imaging in small rodents faces technical challenges like image distortion and signal loss due to local magnetic susceptibility changes.
Purpose of the Study:
- To report functional connectivity measures in mice using isoflurane as the sole anesthetic.
- To address the challenges of small rodent brain imaging for functional connectivity analysis.
Main Methods:
- Utilized isoflurane anesthesia for resting-state fMRI in mice.
- Focused on overcoming technical hurdles in high magnetic field imaging of small rodent brains.
Main Results:
- Successfully obtained reliable functional connectivity measures in the mouse brain.
- Demonstrated the feasibility of using isoflurane for this purpose.
Conclusions:
- Isoflurane anesthesia can yield reliable functional connectivity data in mouse brains.
- This work provides a foundation for future rodent fMRI studies, despite anesthetic impacts on cerebral physiology.
