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Functional connectivity under six anesthesia protocols and the awake condition in rat brain
Jaakko Paasonen1, Petteri Stenroos1, Raimo A Salo1
1A.I.V. Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland.
Neuroimage
|February 8, 2018
Summary
Anesthesia significantly impacts resting-state functional connectivity (rsfMRI) in rats. Propofol and urethane anesthesia minimally altered functional connectivity compared to awake states, offering better data quality for neurobiologic research.
Area of Science:
- Neuroimaging
- Neuroscience
- Pharmacology
Background:
- Resting-state functional magnetic resonance imaging (rsfMRI) is a key translational tool in neurobiology.
- Anesthesia's effects on preclinical rsfMRI functional connectivity (FC) are not well understood.
- Understanding these effects is crucial for accurate interpretation of animal brain imaging data.
Purpose of the Study:
- To investigate how six common anesthesia protocols affect FC in rats.
- To compare FC patterns under anesthesia with those in awake animals.
- To guide rsfMRI study design for improved data quality and comparability.
Main Methods:
- rsfMRI was performed on rats under six distinct anesthesia protocols.
- Functional connectivity (FC) was measured and analyzed for each protocol.
- FC data from anesthetized rats were compared to data from awake rats.
Main Results:
- Each anesthesia protocol uniquely modulated FC patterns.
- Propofol and urethane anesthesia yielded FC patterns most similar to awake rats.
- Isoflurane and medetomidine anesthesia showed the most significant deviations from awake FC patterns.
Conclusions:
- Anesthesia choice critically influences rsfMRI FC findings in preclinical studies.
- Propofol and urethane are recommended for studies prioritizing FC similarity to the awake state.
- These findings aid in optimizing rsfMRI experimental design and data interpretation.
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