Interganglionic dendrites constitute an output pathway from the procerebrum of the sanil Achatina fulica
Interganglionic dendrites constitute an output pathway from the procerebrum of the sanil Achatina fulica
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节间树突构成了蜗牛原脑的输出通路
DOI：
10.1002/cne.902830112
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发表时间：
1989
影响因子：
2.5
通讯作者：
B. Tołłoczko
中科院分区：
文献类型：
--
作者：
R. Chase;B. Tołłoczko
前脑是一个嗅觉加工区，约占肺类腹足类软体动物大脑总面积的三分之一。它有许多不同寻常的特征，包括独立于大脑其他部分的发育，以及缺乏属于其内部神经元的轴突。我们用六胺基氯化钴作为选择性标记，研究了陆生蜗牛Achat ina fulica的前脑的输入和输出通路。触手神经和脑足部结缔神经共同构成一个细小的神经丛，分布于前脑的神经丛区。来自触手神经的纤维主要是突触前的，而来自脑脚结缔组织的纤维主要是突触后的。突触后纤维(树突)被追踪到同侧足神经节腹面附近的两组神经细胞(总数为20-25个)。没有从前脑获得任何其他重要的数字输出途径的证据。由于运动受足神经节控制，这些结果为嗅觉对蜗牛运动行为的强烈影响提供了解剖学基础。这条通路是不寻常的，因为树突是节间的，可以长达5毫米。
The procerebrum is an olfactory processing region that occupies approximately one‐third of the total brain area in pulmonate gastropod molluscs. It has many unusual features, including a development separate from the rest of the brain and the absence of axons belonging to its intrinsic neurons. We have investigated the input and output pathways of the procerebrum in the terrestrial snail Achatina fulica by using hexamminecobalt chloride as a selective label. Both the tentacle nerve and the cerebropedal connective nerve contribute to a fine neural plexus that is distributed throughout the neuropile region of the procerebrum. The fibers from the tentacle nerve are predominantly presynaptic, whereas those from the cerebropedal connective are predominantly postsynaptic. The postsynaptic fibers (dendrites) were traced to two groups of nerve cells (total number, 20–25) near the ventral surface of the ipsilateral pedal ganglion. No evidence was obtained for any other numerically significant output pathway from the procerebrum. Since locomotion is known to be controlled by the pedal ganglion, these results provide an anatomical substrate for the strong influence of olfaction on locomotor behavior in snails. The pathway is unusual in that the dendrites are interganglionic and can be as long as 5 mm.
影响因子：
5.5
作者：
LLINAS, R;SUGIMORI, M
通讯作者：
SUGIMORI, M