Simulations of a Vibrissa Slipping along a Straight Edge and an Analysis of Frictional Effects during Whisking.
Simulations of a Vibrissa Slipping along a Straight Edge and an Analysis of Frictional Effects during Whisking.
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DOI：
10.1109/toh.2016.2522432
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发表时间：
2016-04
影响因子：
2.9
通讯作者：
Hartmann MJ
中科院分区：
文献类型：
--
作者：
Huet LA;Hartmann MJ
在触觉探索过程中，老鼠用胡须扫向物体，这种运动被称为拂动。在这里，我们研究如何晶须沿着物体的边缘滑动，以及摩擦如何影响所产生的触觉信号。首先，开发了一个无摩擦模型来模拟晶须沿直边沿着滑动，并与以前的模型，包括摩擦，但不能模拟滑动进行比较。这两种模型的结果进行比较，作为一个光滑的不锈钢钉拂大鼠获得的行为数据。正如预期的那样，无摩擦模型预测的垂直滑动幅度比实验观察到的要大。无摩擦模型还预测了晶须基部处的力和力矩，这些力和力矩比有摩擦模型预测的力和力矩更小并且具有不同的方向。摩擦系数的估计值接近0.48（晶须/不锈钢）。目前的工作提供了第一次评估的影响，摩擦力的机械信号，由卵泡在积极搅拌。它还演示了一个原理证明的方法，在实验过程中减少晶须跟踪的要求，并证明了模拟一个完整的数组触须搅拌对钉的可行性。
During tactile exploration, rats sweep their whiskers against objects in a motion called whisking. Here we investigate how a whisker slips along an object’s edge and how friction affects the resulting tactile signals. First, a frictionless model is developed to simulate whisker slip along a straight edge and compared with a previous model that incorporates friction but cannot simulate slip. Results of both models are compared to behavioral data obtained as a rat whisked against a smooth, stainless steel peg. As expected, the frictionless model predicts larger magnitudes of vertical slip than observed experimentally. The frictionless model also predicts forces and moments at the whisker base that are smaller and have a different direction than those predicted by the model with friction. Estimates for the friction coefficient yielded values near 0.48 (whisker/stainless steel). The present work provides the first assessments of the effects of friction on the mechanical signals received by the follicle during active whisking. It also demonstrates a proof-of-principle approach for reducing whisker tracking requirements during experiments and demonstrates the feasibility of simulating a full array of vibrissae whisking against a peg.