During the biology classes from junior to senior high, we have learned many interesting instance of different animal behavior. Most people paid more attention on the Vertebrates as their experimental subjects. The other species around us, although with simple body structures, may behave rather complicated and versatile reactions. In particular, one of the most common insects with simple body structure in our neighborhood is the American cockroach (Periplaneta americana). The aim of this study is to investigate the different swing motion modes of antennae of American cockroach by computer-aided Imaging Analysis. The parameters of each swing motion mode were calculated in order to analyze how light (including light stimulation and light adaptation) and vibration may affect the antennae behavior of American cockroach. It was found that the antennae swing motion modes were significantly different under different types of stimulus. If two types of stimulus occurred at the same time, the reactions of antennae motion may become conformable. In conclusion, antennae behavior has shown to significantly affect the survivability and environmental adaptation of American cockroach. Not only the antennae are considered as the sensitive receivers; but also they are the important transmitters to reflect physiological status and environmental condition.從國中到高中的生物課堂上，我們學到許多有趣的動物行為例子，但前人多以脊椎動物作為研究對象，而我們身旁的許多生物，身體構造雖較為簡單，但行為表現卻豐富多樣，尤其是常見的美洲蟑螂(Periplaneta americana)，可說是最親近我們的昆蟲之一。本研究以攝影紀錄的方式，透過電腦進行影像分析，記錄不同刺激下蟑螂的觸角擺動模式，並計算出各項觸角運動的參數，以瞭解光線(照光刺激或照光適應)與震動刺激對其觸角行為的影響。我們發現在不同因子的刺激下，觸角擺動的模式具有差異，若兩種刺激同時發生，蟑螂觸角的行為亦具有整合性的反應，證明蟑螂觸角的行為模式，對其生存與適應具有重要意義。這也代表觸角除了為敏感的受器，亦為能反映出生理與環境狀態的重要動器。
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