CARTESIAN REPRESENTATION OF STIMULUS DIRECTION - PARALLEL-PROCESSING BY 2 SETS OF GIANT INTERNEURONS IN THE COCKROACH
CARTESIAN REPRESENTATION OF STIMULUS DIRECTION - PARALLEL-PROCESSING BY 2 SETS OF GIANT INTERNEURONS IN THE COCKROACH
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DOI：
10.1007/bf01021589
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发表时间：
1995-05-01
期刊：
影响因子：
--
通讯作者：
CAMHI, JM
中科院分区：
文献类型：
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作者：
KOLTON, L;CAMHI, JM
美洲大蠊（Periplaneta americana）在地面和飞行时都会对风吹做出反应，转身离开。在地面上，腹侧巨型中间神经元（ventrals）编码风向并指定转向，而在飞行时，背侧巨型中间神经元（dorsals）似乎这样做。我们在这里报告这些细胞的反应，以控制不同方向的风刺激。利用改进的风刺激和定位方法，动物揭示了以前没有观察到的重要组织原则：每侧轴突直径最大的六个细胞优先响应同侧风。其中一个细胞，以前被认为是无方向性反应的（巨大中间神经元2），被发现有一个有限的方向性反应（图3）。腹侧巨大中间神经元之间的方向编码组织与背侧几乎相同（图2）。每组包含，在每一边，一个细胞，主要是风从同侧前，另一个主要是在同侧后方，和第三个响应更广泛的同侧frontandrear.These结果进行了讨论的机制，定向本地化的组装巨型interneurons。
The cockroach Periplaneta americana responds to wind puffs by turning away, both on the ground and when flying. While on the ground, the ventral giant interneurons (ventrals) encode the wind direction and specify turn direction, whereas while flying the dorsal giant interneurons (dorsals) appear to do so. We report here on responses of these cells to controlled wind stimuli of different directions. Using improved methods of wind stimulation and of positioning the animal revealed important principles of organization not previously observed.All six cells of largest axonal diameter on each side respond preferentially to ipsilateral winds. One of these cells, previously thought to respond non-directionally (giant interneuron 2), was found to have a restricted directional response (Fig. 3). The organization of directional coding among the ventral giant interneurons is nearly identical to that among the dorsals (Fig. 2). Each group contains, on each side, one cell that responds primarily to wind from the ipsilateral front, another primarily in the ipsilateral rear, and a third responding more broadly to ipsilateral front and rear.These results are discussed in terms of the mechanisms of directional localization by the assembly of giant interneurons.