Hedwig B
J Exp Biol. 1998 Jun;201 (Pt 12):731-44. doi: 10.1242/jeb.201.5.731.
A new optoelectronic method was used for the measurement of wing movements in tethered flying locusts. The method is based on laser light coupled into a highly flexible optical fibre fastened to a forewing. A dual-axis position-sensing photodiode, aligned to the wing hinge, revealed the flapping, i.e. up-down movement, and lagging, i.e. forward-backward movement, of the wingtip as indicated by the emitted light. Measurements were combined with electromyographic recordings from flight muscles and with intracellular recording and stimulation of flight motoneurones. Compared with muscle recordings, intracellular recordings showed an increase in the variability of motoneurone activity. Stimulation of flight motoneurones reliably caused distinct effects on wing movements. Inhibition of elevator (MN83, MN89) activity led to a decrease in the amplitude of the upstroke. Inhibition of depressor (MN97) activity reduced the amplitude of the downstroke and sometimes stopped flight behaviour. An increase in MN97 activity caused a reduction in the extent of the upward movement and prolonged the flight cycle.
一种新的光电方法被用于测量系留飞行蝗虫的翅膀运动。该方法基于耦合到固定在前翅上的高柔韧性光纤中的激光。一个与翅膀铰链对齐的双轴位置传感光电二极管，通过发射光揭示了翅尖的拍打（即上下运动）和滞后（即前后运动）。测量结果与飞行肌肉的肌电图记录以及飞行运动神经元的细胞内记录和刺激相结合。与肌肉记录相比，细胞内记录显示运动神经元活动的变异性增加。刺激飞行运动神经元可靠地对翅膀运动产生明显影响。抑制提升肌（MN83、MN89）活动导致上冲程幅度减小。抑制下压肌（MN97）活动降低了下冲程幅度，有时还会停止飞行行为。MN97活动增加导致向上运动的程度减小，并延长了飞行周期。
