fixed action pattern

(redirected from Sign stimulus)
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fixed action pattern

a stereotyped behavioural response.
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These behaviors are under neural control: the neural network responsible for detecting the simple cue (the sign stimulus or releaser) and for activating the instinct, or fixed action pattern, is termed the "innate releasing mechanism" (Manning and Dawkins, 2012).
Like other cephalopods, cuttlefish possess well-developed vision; therefore, they must perceive particular visual information from prey and then initiate hunting behavior, in a manner similar to a typical reaction to the sign stimulus reported in other animals.
This suggests that an innate preference for specific organism-like objects moving along the direction of their long axis is retained as cuttlefish grow, and it functions as a sign stimulus to elicit hunting behavior.