Wings and halteres act as coupled dual oscillators in flies
Abstract
The mechanics of Dipteran thorax is dictated by a network of exoskeletal linkages that, when deformed by the flight muscles, generate coordinated wing movements. In Diptera, the forewings power flight, whereas the hindwings have evolved into specialized structures called halteres, which provide rapid mechanosensory feedback for flight stabilization. Although actuated by independent muscles, wing and haltere motion is precisely phase-coordinated at high frequencies. Because wingbeat frequency is a product of wing-thorax resonance, any wear-and-tear of wings or thorax should impair flight ability. How robust is the Dipteran flight system against such perturbations? Here, we show that wings and halteres are independently driven, coupled oscillators. We systematically reduced the wing length in flies and observed how wing-haltere synchronization was affected. The wing-wing system is a strongly coupled oscillator, whereas the wing-haltere system is weakly coupled through mechanical linkages that synchronize phase and frequency. Wing-haltere link acts in a unidirectional manner; altering wingbeat frequency affects haltere frequency, but not vice versa. Exoskeletal linkages are thus key morphological features of the Dipteran thorax that ensure wing-haltere synchrony, despite severe wing damage.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 16, 2021
- Source ID
- 10.7554/elife.53824
Entities
People
- Sanjay P Sane
- Siddharth S Sane
- Tanvi Deora
Organizations
- Air Force Office of Scientific Research
- Azim Premji University
- Department of Science and Technology
- Human Frontier Science Program
- Tata Institute of Fundamental Research
- University of Washington