Idiothetic orientation of a wandering spider: Compensation of detours and estimates of goal distance
Idiothetic orientation of a wandering spider: Compensation of detours and estimates of goal distance
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流浪蜘蛛的独特方向：弯路补偿和目标距离估计
DOI：
10.1007/bf00300103
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发表时间：
1982
影响因子：
2.3
通讯作者：
F. Barth
中科院分区：
文献类型：
--
作者：
E. Seyfarth;Rita Hergenröder;Hartmut Ebbes;F. Barth
游荡的蜘蛛Cupiennius Salei Keys使用愚蠢的定向，即记忆关于自己先前运动的信息，来找回丢失的猎物。蜘蛛在被猎蝇赶走后，在超过75厘米的距离内返回捕获地点(目标)，即使所有外部定向线索都被排除在外。通过改变本体感觉和“运动指令”输入到记忆中，并通过消融蜘蛛腿上特定的里氏狭缝感觉器官来检验这种行为及其感觉基础。在从20厘米到41厘米的6个离散距离上直线追逐后，返回目标的成功率随着距离的增加而下降。在41厘米的距离上，超过50%的完整蜘蛛的表演是成功的，因为动物接近捕获地点的距离只有5厘米(或更少)。已经做过手术的动物(所有股骨上的筛状器官都被摧毁)即使在很短的距离内也不太成功。完整蜘蛛和被手术的蜘蛛返回的平均起始角没有显著差异。整个返回路径每一段的行走误差EN表明，完整的动物几乎没有偏离理想的返回路线，并正确地估计了到目标的距离。被操纵的蜘蛛倾向于偏离理想的返回路线，而它们的距离估计在很大程度上保持准确。经过半圆形走廊的曲线追逐后返回的蜘蛛不会沿着弯曲的路径返回；相反，蜘蛛会走捷径。在完整蜘蛛和对照蜘蛛(假手术)的所有表演中，85%是成功的。相比之下，8组感觉消融的成功率大多在50%以下，对半圆形绕道的补偿不完全：返回的平均起始方向偏斜，指向走廊，许多返回路径的形状反映出弯曲的走廊形状。在追逐过程中，只有当手术腿处于内曲线周长时，单侧切除其股骨里氏器官的蜘蛛显示出低的成功率，而在相反的情况下，它们的返回参数与正常组相似(手术腿在外周)。这些侧特异性消融效应与收集和记忆独有信息时存在的几何情况相关，表明独有记忆至少部分依赖于本体感受器的输入。
SummaryThe wandering spider Cupiennius salei Keys uses idiothetic orientation, i.e., memorized information about its own previous movements, to retrieve lost prey. Spiders, having been chased away from a prey fly, return to the capture site (the goal) over a distance of more than 75 cm even though all external orientation cues were precluded. This behavior and its sensory basis were examined by varying the proprioceptive and ‘motor command’ inputs to the memory and by ablating particular lyriform slit sense organs on the legs of the spider.The success rate of returns to the goal after rectilinear chases over 6 discrete distances ranging from 20 cm to>41 cm declines with increasing distances. At distances>41 cm, more than 50% of the performances of intact spiders are nevertheless ‘successful’, in that the animals approach the capture site as close as 5 cm (or less).Animals that have been operated on (lyriform organs on all femora destroyed) are much less successful even at short distances. The mean starting angles of the returns by intact spiders and by those operated on do not differ signficantly. ‘Walking error en’ for each segment of the entire return path shows that intact animals deviate little from the ideal return route and correctly estimate the distance to the goal. The operated spiders tend to drift off the ideal return route, while their distance estimates remain largely accurate.Returns after curvilinear chases through a semicircular corridor do not retrace the curved path; instead the spiders take a shortcut. Of all performances by intact and by control spiders (with sham operations) 85% are successful. By contrast, most of the 8 groups with sensory ablations have a success rate of less than 50%.Compensation for the semicircular detours is not quite complete: the mean starting directions of returns are biased, pointing to the corridor, and the shape of many return paths reflects the curved corridor shape. Spiders with unilateral ablations of their femoral lyriform organs show low success rates only if the operated legs are on the inner curve perimeter during the chase, while their return parameters resemble those of the intact group in the reverse situation (operated legs on outer perimeter). These side-specific ablation effects, which are correlated with the geometrical situation existing while idiothetic information is gathered and memorized, suggest that the idiothetic memory depends at least partly on input from proprioceptors.