Levine R L, Dethier S
J Comp Neurol. 1985 Jul 22;237(4):427-44. doi: 10.1002/cne.902370402.
We have investigated olfactory bulb connections in the goldfish by using both horseradish peroxidase applied to olfactory tract lesions and wheat germ agglutinin-conjugated peroxidase administered to the olfactory bulb. The projections from the bulb pass to the brain in two major bundles: the lateral and the medial olfactory tracts. The lateral tract innervates the posterior terminal field in the area dorsalis. The medial tract divides into two rami. The dorsolateral ramus is the most substantial olfactory bundle in the brain and innervates several targets in both the area dorsalis and the area ventralis. The ventromedial ramus appears to innervate targets in the area ventralis exclusively. In addition, fibers of the medial olfactory tract (both rami) innervate the preoptic nucleus as well as targets in the diencephalon and, possibly, in the mesencephalon as well. Olfactory fibers from the dorsolateral and ventro-medial rami cross the midline in the dorsal and ventral olfactory decussations, respectively. Between these two decussations is a dense olfactory plexus which has not previously been reported, and which may serve as a nexus allowing interchange of fibers between the two olfactory rami. The terminal nerve in the goldfish has two parts. The major part of the nerve projects to the ventral nucleus (Vv) and is far more extensive than has previously been reported. A much less substantial component of the terminal nerve projects to the two retinae. There are four large groups of cells in the telencephalon which project to the olfactory bulb. Of these two, the dorsal and the anterolateral groups have not been described in previous studies of the goldfish. We also report weakly labeled bulbopetal cells in the nucleus preglomerulosus and in the locus ceruleus.
我们通过将辣根过氧化物酶应用于嗅束损伤以及将小麦胚凝集素结合过氧化物酶注入嗅球，对金鱼的嗅球连接进行了研究。来自嗅球的投射以两大束进入大脑：外侧嗅束和内侧嗅束。外侧嗅束支配背侧区的后终末场。内侧嗅束分为两支。背外侧支是大脑中最主要的嗅束，支配背侧区和腹侧区的多个靶点。腹内侧支似乎仅支配腹侧区的靶点。此外，内侧嗅束（两支）的纤维支配视前核以及间脑的靶点，可能还包括中脑的靶点。来自背外侧支和腹内侧支的嗅纤维分别在背侧和腹侧嗅交叉处交叉中线。在这两个交叉之间是一个密集的嗅丛，此前尚未有报道，它可能作为一个连接点，允许两支嗅束之间的纤维交换。金鱼的终末神经有两部分。神经的主要部分投射到腹侧核（Vv），其范围比此前报道的要广泛得多。终末神经中一个不太重要的部分投射到两个视网膜。端脑中投射到嗅球的细胞有四大组。其中，背侧组和前外侧组在金鱼此前的研究中未曾被描述过。我们还报告了在前肾小球核和蓝斑中有弱标记的向嗅球投射的细胞。
