Signal stimulation is a kind ofanimalA specific stimulus that has a fixed relationship with a certain instinctive response.When used in animal ethology, its meaning is different from that of conditional stimulus: the former is the instinctive response of animals;The latter is learned.Multiple automatic objects themselves, such as action, posture, color, sound or smell.For example, the belly of the male tricanth is red.Dorsal finIt is shaped like three spines and occupies a territory during the breeding season. When encountering the invasion of the same kind of male fish, it points its red belly at the invader, and then stands upright with its head down and shakes its back toward the invader. This is a signal stimulus of attack, causingintruderEscape reaction.[1]
First, stimuli directly respond to specific stimuli through specific sensory pathways of the brain, such as the visual center responseVisual stimulus, auditorythe central administrationRespond to acoustic stimuli.
Second, each sensory path is separatedlateral branchorbranch, forming a wide range ofneural network, called the neuro reticular apparatus, which is afferentexcitementThe so-called non-specific sensory pathway is connected with the secondary and higher brain centers, and arousing these centers plays an active role.Second, for any stimulus, it can not only cause the response related to the stimulus itself, but also change the responsiveness to other stimuli.
Animals generally respond to only a part of many stimuli received from the outside world, which is called signal stimulus.Not only are thereUniquenessAnd more than two stimuli produce a lot of additive effects.
especialvoice、smell、colourCan become a signal stimulus, sometimes called a trigger (releaser).In this situation, stimulus response forms a signal system, such asbirdandbutterflyThe beautiful color on his body is closely related to his courtship behavior, and Weiheqi's behavior, because this color is particularly obvious[2]。
Signal selection
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1) The receptivity of sensory organs has its own limits, which is called terminal sexwave filter, such as sound stimulation andlivestockThis is an example of listening.
2) Viathe central administrationFor stimulus selection, behaviorists call it "genetic release mechanism". The Tinger gen (1952) defined it as "a special neurosensory mechanism necessary to accept the selectivity of signal stimulus of a specific combination, which is the mechanism that triggers the response to the corresponding stimulus." There are also many different views on this statement.In short, there is no doubt that there is an information filtering agency with neurophysiological significance in the center[2]。
