in vivo Muscle Length Changes in Bumblebees and the in vitro Effects on Work and Power
| Autor: | C. P. Ellington, K. M. Gilmour |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Wing
biology Physiology Bombus lucorum Work (physics) Strain (injury) Anatomy Aquatic Science medicine.disease biology.organism_classification Compliance (physiology) medicine.anatomical_structure In vivo Insect Science Lens (anatomy) medicine Animal Science and Zoology Molecular Biology Ecology Evolution Behavior and Systematics Cuticle (hair) |
| Zdroj: | Journal of Experimental Biology. 183:101-113 |
| ISSN: | 1477-9145 0022-0949 |
| DOI: | 10.1242/jeb.183.1.101 |
| Popis: | The amplitude and time course of muscle length changes were examined in vivo in tethered, flying bumblebees Bombus lucorum. A ‘window’ was cut in the dorsal cuticle and aluminium particles were placed on the exposed dorsal longitudinal muscle fibres. Muscle oscillations were recorded using high-speed video and a high-magnification lens. The amplitude of muscle length changes was 1.9% (S.D.=0.5%, N=7), corresponding to the commonly quoted strain of 1–3% for asynchronous muscle. Higher harmonics, particularly the second, were found in the muscle oscillations and in the wing movements. The second harmonic for wing movements was damped in comparison to that for muscle length changes, probably as a result of compliance in the thoracic linkage. Inclusion of the second harmonic in the driving signal for in vitro experiments on glycerinated fibres generally resulted in a decrease in the work and power, but a substantial increase was found for some fibres. |
| Databáze: | OpenAIRE |
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