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Proprioception gates visual object fixation in flying flies.

Martha Rimniceanu1, John P Currea1, Mark A Frye1

  • 1Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, CA 90095, USA.

Current Biology : CB
|March 31, 2023
PubMed
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Fruit flies in flight simulators exhibit reduced object tracking when yaw rotation is restricted. Proprioceptive signals, not visual ones, are key to maintaining heading and tracking motion, influencing optomotor responses.

Area of Science:

  • Neuroscience
  • Animal Behavior
  • Biophysics

Background:

  • Visual object tracking is crucial for animal behaviors like predation and navigation.
  • Tethered flies in visual simulators typically fixate on moving bars, mimicking natural behaviors.

Purpose of the Study:

  • To investigate the role of yaw rotation and proprioception in visual object tracking in Drosophila melanogaster.
  • To understand how sensory feedback influences optomotor responses.

Main Methods:

  • Utilized a modified flight simulator with a magnetic pivot for frictionless yaw rotation.
  • Compared responses of body-fixed and yaw-free flies to moving visual stimuli (bars and ground).
  • Investigated the effect of artificially clamping visual stimuli.
Keywords:
feature detectionfly visionnavigationoptomotor

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Main Results:

  • Yaw-free flies showed attenuated bar fixation and steering responses to bar velocity.
  • Proprioceptive feedback, not visual signals, was found to be critical for heading maintenance.
  • Yaw-free flies prioritized ground motion over bar motion when frequencies differed.

Conclusions:

  • Proprioceptive feedback plays a vital role in damping high-gain optomotor responses to object motion.
  • The ability to track objects is significantly influenced by the fly's capacity for self-motion (yaw).