解析卷曲形状揭示了C. elegans
Resolving coiled shapes reveals new reorientation behaviors in C. elegans
摘要：
我们利用C的约化空间。elegans postures开发了一种新的跟踪算法，该算法既能捕捉简单的形状，也能捕捉自封闭线圈，这是蠕虫行为的一个重要但尚未探索的组成部分。我们应用我们的算法来表明，视觉上复杂的，卷曲的序列是两个简单的模式的叠加：体波动力学和头部曲率脉冲。我们证明了精确的线圈动态的逃避反应，并发现新的行为，自发的，大幅度线圈;深重定向发生通过经典的欧米茄形姿势，也通过更大的，新的姿势兴奋，我们在这里标记为三角洲的转折。我们发现，欧米茄和三角洲的转折独立发生，一个随机的左，右步骤的蛇形模拟，这表明一个独特的触发机制。我们还表明，欧米茄和三角洲轮流显示近似相等的速率，并适应无食物的条件下，在类似的时间尺度，一个简单的策略，以避免导航偏差。
英文摘要：
We exploit the reduced space of C. elegans postures to develop a novel tracking algorithm which captures both simple shapes and also self-occluding coils, an important, yet unexplored, component of worm behavior. We apply our algorithm to show that visually complex, coiled sequences are a superposition of two simpler patterns: the body wave dynamics and a head-curvature pulse. We demonstrate the precise coiled dynamics of an escape response and uncover new behaviors in spontaneous, large amplitude coils; deep reorientations occur through classical Omega-shaped postures and also through larger, new postural excitations which we label here as delta-turns. We find that omega and delta turns occur independently, the serpentine analog of a random left-right step, suggesting a distinct triggering mechanism. We also show that omega and delta turns display approximately equal rates and adapt to food-free conditions on a similar timescale, a simple strategy to avoid navigational bias.
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