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Behavioral neuroimaging in birds using PET.

Michael Salerno1, Elizabeth Ferrer2, Shouyi Wei1

  • 1Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY, 11794-5230, USA.

Journal of Neuroscience Methods
|February 3, 2019
PubMed
Summary
This summary is machine-generated.

We developed a new non-invasive PET imaging method to study bird brain metabolism during flight. This technique reveals brain regions linked to flight behavior in birds, advancing neuroscience research.

Keywords:
BehaviorBrain imagingGlucose metabolic rateKinetic modelingPET

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Area of Science:

  • Neuroscience
  • Comparative Physiology
  • Biomedical Imaging

Background:

  • Birds exhibit remarkable diversity, potentially linked to the evolution of flight.
  • Current brain function study methods are not fully adapted for avian research, particularly for behaviors like flight.
  • Understanding avian brain metabolism is crucial for comprehending their behavioral adaptations.

Purpose of the Study:

  • To develop and validate a novel in vivo experimental method for studying avian brain metabolism.
  • To investigate regional metabolic changes in the bird brain associated with flight behavior using Positron Emission Tomography (PET).
  • To establish a comprehensive protocol applicable to various avian behaviors.

Main Methods:

  • Utilized in vivo experimental methods with F-18 labeled fluorodeoxyglucose (FDG) PET imaging.
  • Developed a comprehensive protocol including species selection, behavioral/imaging paradigms, animal preparation, radiotracer injection, and enhanced brain atlas analysis.
  • Incorporated preliminary modeling studies for tracer kinetic analysis.

Main Results:

  • Successfully identified brain regions statistically associated with flight using a small sample size (8 animals).
  • Observed similar peak brain uptake of FDG in birds and rodents, despite differences in blood glucose levels.
  • Provided evidence for decreased FDG uptake post-peak in birds, potentially due to distinct dephosphorylation rates compared to mammals.

Conclusions:

  • The developed FDG PET imaging protocol is a non-invasive yet sensitive tool for studying avian brain metabolism.
  • This method allows for the detection of regional metabolic changes in the bird brain related to specific behaviors, including flight.
  • The protocol offers improved approaches for avian brain research, including species selection, realistic behavior paradigms, and enhanced quantification.