Matheson T
J Exp Biol. 1997;200(Pt 1):93-100. doi: 10.1242/jeb.200.1.93.
Intact locusts (Schistocerca gregaria) respond to tactile stimulation of their folded wings with rhythmic scratching movements of the ipsilateral hindleg that are directed towards the site of stimulation. For example, sites near the base of a wing elicit anteriorly directed scratches, whereas sites near the distal end of a wing elicit posteriorly directed scratches. Locusts also scratch in response to tactile stimulation of a wing that is held outstretched in a posture similar to that normally adopted during flight, but they fail to alter their leg targeting to compensate for this changed position of the stimulus site. Instead, they scratch at an empty point in space near the abdomen, where the stimulus site would have been if the wing was folded in the resting posture. This inappropriate scratching does not result from mechanical constraints on the hindleg's movement, from stimulation of abdominal sensory receptors, or from an absence of sensory information from the outstretched wing. It also persists when the metathoracic ganglion that controls movements of the hindlegs is isolated from the remainder of the central nervous system (CNS). Targeted scratching of sites on the wings of locusts therefore appears to be fixed relative to body coordinates and does not take into account alterations of the target wing's position.
完整的蝗虫（沙漠飞蝗）会对其折叠翅膀的触觉刺激做出反应，同侧后腿会有节奏地进行抓挠动作，且动作方向指向刺激部位。例如，靠近翅膀基部的部位会引发向前的抓挠动作，而靠近翅膀远端的部位则会引发向后的抓挠动作。蝗虫在对伸展成类似飞行时正常姿势的翅膀进行触觉刺激时也会抓挠，但它们不会改变腿部的目标指向以补偿刺激部位位置的这种变化。相反，它们会在腹部附近的一个空的空间点抓挠，如果翅膀以休息姿势折叠，刺激部位原本会在那里。这种不适当的抓挠并非源于后腿运动的机械限制、腹部感觉感受器的刺激，也不是由于伸展翅膀缺乏感觉信息。当控制后腿运动的后胸神经节与中枢神经系统（CNS）的其余部分分离时，这种情况也会持续存在。因此，蝗虫翅膀上部位的定向抓挠似乎相对于身体坐标是固定的，并且不会考虑目标翅膀位置的改变。
