Related Experiment Videos
Jumping and kicking in bush crickets.
Malcolm Burrows1, Oliver Morris
1Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK. mb135@hermes.cam.ac.uk
The Journal of Experimental Biology
|February 13, 2003
Summary
Bush crickets achieve powerful jumps and kicks using specialized hind legs. Muscle activity and high-speed imaging reveal how leg mechanics enable rapid movements and stability.
Area of Science:
- Biomechanics
- Insect locomotion
Background:
- Bush crickets possess long hind legs adapted for rapid jumping and kicking.
- Understanding the neuromuscular mechanisms behind these fast movements is crucial for biomechanical analysis.
Purpose of the Study:
- To analyze the mechanisms of fast leg movements in bush crickets.
- To correlate muscle activity with leg and body motion during jumps and kicks.
Main Methods:
- High-speed imaging to capture leg and body movements.
- Electromyography to record femoral muscle activity.
- Analysis of joint mechanics and muscle force balance.
Main Results:
- Bush crickets can jump significant distances with high acceleration and velocity.
- Tibial extension during kicking is extremely rapid, with high rotational velocities.
- Muscle co-contraction patterns vary, and rapid extension is linked to fast extensor tibiae (FETi) motor neuron activity.
- Leg morphology and tendon mechanics enhance muscle performance.
Conclusions:
- The biomechanics of bush cricket hind legs enable powerful and rapid jumping and kicking.
- Neuromuscular control, including FETi neuron activity, plays a key role in movement velocity.
- Leg joint and muscle interactions contribute to efficient force transmission and movement control.