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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Tactile guidance of prey capture in Etruscan shrews
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Tactile guidance of prey capture in Etruscan shrews

机译：伊特鲁里亚sh捕获猎物的触觉指导

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摘要

Whereas visuomotor behaviors and visual object recognition have been studied in detail, we know relatively little about tactile object representations. We investigate a new model system for the tactile guidance of behavior, namely prey (cricket) capture by one of the smallest mammals, the Etruscan shrew, Suncus etruscus. Because of their high metabolic rate and nocturnal lifestyle, Etruscan shrews are forced to detect, overwhelm, and kill prey in large numbers in darkness. Crickets are exquisitely mechanosensitive, fast-moving prey, almost as big as the shrew itself. Shrews succeed in hunting by lateralized, precise, and fast attacks. Removal experiments demonstrate that both macrovibrissae and microvibrissae are required for prey capture, with the macrovibrissae being involved in attack targeting. Experiments with artificial prey replica show that tactile shape cues are both necessary and sufficient for evoking attacks. Prey representations are motion- and size-invariant. Shrews distinguish and memorize prey features. Corrective maneuvers and cricket shape manipulation experiments indicate that shrew behavior is guided by Gestalt-like prey descriptions. Thus, tactile object recognition in Etruscan shrews shares characteristics of human visual object recognition, but it proceeds faster and occurs in a 20,000-times-smaller brain.
机译：尽管已对粘性运动行为和视觉对象识别进行了详细研究，但我们对触觉对象表示知之甚少。我们调查行为的触觉指导，即最小的哺乳动物之一，伊特鲁里亚sh，Suncus etruscus，捕获猎物（板球）的新模型系统。由于它们的高代谢率和夜间生活方式，伊特鲁里亚人sh被迫在黑暗中发现，淹没并杀死大量猎物。对机械灵敏，移动迅速，是猎物，几乎和the一样大。 rew通过横向，精确和快速的攻击成功地进行了狩猎。去除实验表明，捕获猎物既需要宏观触须也需要微观触须，而宏观触须参与了攻击目标。人造猎物复制品的实验表明，触觉形状提示对于引发攻击既必要又足够。猎物的表现是运动和大小不变的。 rew区分并记忆猎物特征。矫正演习和板球形状操纵实验表明，rew的行为受格式塔式猎物描述的指导。因此，伊特鲁里亚人的触觉对象识别具有人类视觉对象识别的共同特征，但是它进行得更快，并且发生在小20,000倍的大脑中。

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