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Flight-induced compass representation in the monarch butterfly heading network.
M Jerome Beetz1, Christian Kraus1, Myriam Franzke1
1Zoology II, Biocenter, University of Würzburg, Am Hubland 1, 97074 Würzburg, Germany.
Current Biology : CB
|November 25, 2021
Summary
Monarch butterflies use a sun compass for migration. This study reveals how flight transforms heading neurons in their central complex, creating a robust global compass for long-distance navigation.
Area of Science:
- Neuroscience
- Animal Behavior
- Biophysics
Background:
- Animals rely on internal compasses for navigation, essential for long-distance migrants like monarch butterflies.
- Sun-compass neurons in the central complex are implicated in navigation, but their function during locomotion is poorly understood.
Purpose of the Study:
- To investigate how flight activity modulates heading representation in monarch butterfly central complex neurons.
- To determine if flight transforms the central complex into a functional global compass.
Main Methods:
- Utilized tetrode recordings from tethered flying monarch butterflies.
- Analyzed neural activity to understand heading representation during flight.
Main Results:
- Demonstrated that heading-direction neurons in flying butterflies exhibit altered tuning compared to stationary ones.
- Showed that the central complex network functions as a global compass during flight, prioritizing steering feedback.
- Confirmed robust heading representation even with unreliable visual input.
Conclusions:
- Flight-induced modulation transforms central complex neurons into a dynamic global compass.
- This neural mechanism supports robust migratory heading maintenance over extensive distances in monarch butterflies.
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