How stimulus direction determines the trajectory of the Mauthner-initiated escape response in a teleost fish.
How stimulus direction determines the trajectory of the Mauthner-initiated escape response in a teleost fish.
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发表时间：
1991-11
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通讯作者：
R. C. Eaton;Deanna S. Emberley
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作者：
R. C. Eaton;Deanna S. Emberley
鱼类使用mauthner发起的C-start来短时间躲避捕食者。c型起步包括急转弯（阶段1）和快速加速（阶段2）。我们分析了金鱼c -start的高速电影，这是通过把一个球扔进水里引起的。以前认为，第一阶段的角度并不随威胁刺激相对于鱼的位置的角度而变化。然而，我们发现，在第一阶段结束时，球的冲击方向和转弯角度之间存在显著的反比关系。当从墙附近开始，或者当它通常的轨迹被墙挡住时，鱼会使用一条从刺激角度无法预测的逃跑路线。如果鱼开始转向球，它似乎并没有纠正它的轨迹。这一行为证据支持了之前的观点，即潜在的神经指令是弹道式的，一旦运动开始，就不会使用来自刺激的感觉信息。如果是这样的话，鱼可能在触发刺激之前的间隔中利用了障碍物位置的信息。
Fishes use the Mauthner-initiated C-start for short-latency evasion of predators. C-starts consist of a sudden turn (stage 1) and a rapid acceleration (stage 2). We analyzed high-speed ciné films of goldfish C-starts elicited by dropping a ball into the water. It was previously thought that stage 1 angle does not vary concomitantly with the angle of the threatening stimulus relative to the position of the fish. We found, however, a significant inverse relationship between the direction of the impact of the ball and the angle turned by the end of stage 1. When starting near a wall, or when its usual trajectory was blocked by a wall, the fish used an escape route that was not predictable from the stimulus angle. The fish did not appear to correct its trajectory if it began to turn towards the ball. This behavioral evidence supports the previous notion that the underlying neural command is ballistic and does not use sensory information from the stimulus once the movement begins. If this is so, the fish probably utilizes information on obstacle location in the interval leading up to the trigger stimulus.