Meyer D J, Margiotta J F, Walcott B
J Neurobiol. 1981 Jan;12(1):93-6. doi: 10.1002/neu.480120109.
We show that the "escape response" (running) of the cockroach Periplaneta americana is interrupted when the insect runs through a shadow. Shadows were cast by holding an opaque plastic sheet so that the cockroach ran beneath it. In control experiments, a similarly positioned clear plastic sheet was ineffective. Removal of the shadow stimulus allowed running to continue. The likelihood that cockroaches would resume running after removal of the shadow stimulus decreased with the time they were allowed to remain in shadow.
我们发现，当美洲大蠊在阴影中奔跑时，其“逃避反应”（奔跑）会被打断。通过手持一块不透明塑料片来投射阴影，使蟑螂在其下方奔跑。在对照实验中，同样位置的透明塑料片则没有效果。去除阴影刺激后，蟑螂就能继续奔跑。随着蟑螂在阴影中停留时间的增加，去除阴影刺激后它们恢复奔跑的可能性会降低。
