Siegmund H, Santibáñez G
Acta Neurobiol Exp (Wars). 1982;42(4-5):311-26.
The development of the effector pattern of the unconditioned and instrumental conditioned audio-visual targeting reflex was studied. EOG and EMG electrodes were implanted to analyze the movements of the pinna, eye and head, when the animals localized a sound source placed in different positions in space. When the acoustic stimulus was repeated, the unconditioned targeting reflex was characterized by a rapid intra- and intersessional habituation of the three motor components. In the second part of the experiment the unconditioned targeting reflex was reinforced by food to build up an instrumental conditioned targeting reflex. It was shown, that under both experimental conditions the targeting reflex began with the auricular component, followed by the oculo-cephalic response. After conditioning the latencies were decreased in comparison with the unconditioned reactions. The shortest latencies and most stable responses were found in the pinna muscles ipsilateral to the sound source. After conditioning the resistance to extinction was increased for all three motor components, but the pinna movement ipsilateral to the sound source was again the component most resistant to extinction.
研究了无条件和工具性条件化视听定向反射效应模式的发展。植入眼电图（EOG）和肌电图（EMG）电极，以分析动物在定位空间中不同位置的声源时耳廓、眼睛和头部的运动。当重复声学刺激时，无条件定向反射的特征是三个运动成分在会话内和会话间迅速产生习惯化。在实验的第二部分，通过食物强化无条件定向反射，以建立工具性条件化定向反射。结果表明，在两种实验条件下，定向反射均始于耳廓成分，随后是眼-头反应。与无条件反应相比，条件化后潜伏期缩短。在声源同侧的耳廓肌肉中发现了最短的潜伏期和最稳定的反应。条件化后，所有三个运动成分的消退抗性均增加，但声源同侧的耳廓运动再次成为最抗消退的成分。
