Escape flight initiation in the fly
Escape flight initiation in the fly
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DOI：
10.1007/s00359-006-0203-9
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发表时间：
2007-04-01
影响因子：
2.1
通讯作者：
O'Shea, Michael
中科院分区：
文献类型：
--
作者：
Hammond, Sarah;O'Shea, Michael
根据公认的说法，果蝇在视觉上引发的逃逸飞行启动，涉及到中腿的快速伸展，在机翼仍然折叠的情况下将苍蝇推向空中。这一描述仍然没有受到挑战，并被解释为一种简单的神经回路，即巨型纤维(GF)系统的激活。然而，公认的逃逸描述与刺激GF系统时记录的事件顺序不一致。具体地说，以前的电生理记录已经表明，由于翅膀还没有被抬起，翅膀抑制肌在翅膀处于被压下的位置之前被激活。在这里，我们表明公认的行为描述是错误的。逃生飞行实际上是从机翼抬高开始的。目前的GF系统模型被修改，以考虑苍蝇逃跑时发生的实际事件序列。
Visually evoked escape flight initiation in Drosophila, according to the accepted account, involves a rapid extension of the middle legs that propels the fly into the air while the wings are still folded. This description has remained unchallenged and is accounted for in terms of the activation of a simple neural circuit, the Giant fibre (GF) system. The accepted description of escape is however inconsistent with the sequence of events recorded when the GF system is stimulated. Specifically, previous electrophysiological recordings have shown that the wing depressor muscles are activated before the wings are in a position to be depressed because they have not yet been elevated. Here we show that the accepted behavioural description is wrong. Escape flight initiation actually begins with wing elevation. The current model of the GF system is revised to account for the actual sequence of events that occur when a fly escapes.