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Proprioceptive input patterns elevator activity in the locust flight system.

H Wolf1, K G Pearson

  • 1Department of Physiology, University of Alberta, Edmonton, Canada.

Journal of Neurophysiology
|June 1, 1988
PubMed
Summary
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Locust flight control relies on wing sense organs. Hind wing tegulae initiate elevator activity, while wing-hinge stretch receptors regulate its duration, ensuring precise flight motor patterns.

Area of Science:

  • Neuroscience
  • Insect Physiology
  • Locomotion Control

Background:

  • The flight motor pattern in insects is crucial for locomotion.
  • Wing sense organs play a vital role in modulating flight.
  • Understanding sensory feedback is key to deciphering motor control.

Purpose of the Study:

  • To investigate the roles of hind wing tegulae and wing-hinge stretch receptors in locust flight.
  • To determine how these sensory inputs contribute to the generation of the flight motor pattern.

Main Methods:

  • Intracellular recordings of neural activity in tethered flying locusts (Locusta migratoria).
  • Selective ablation of sensory input from specific wing sense organs.
  • Selective stimulation of receptor afferents to assess their functional impact.

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Main Results:

  • Hind wing tegulae input initiates elevator activity and rapid depolarization.
  • Wing-hinge stretch receptor input controls elevator depolarization duration by suppressing a late component.
  • Tegula input dominates elevator activity at high wingbeat frequencies (>15 Hz).

Conclusions:

  • Flight motor pattern timing is determined by phasic afferent input from tegulae and stretch receptors.
  • Stretch receptors regulate elevator activity duration based on wing movement feedback.
  • Distinct sensory inputs differentially control specific aspects of locust flight motor control.