Antennular projections to the midbrain of the spiny lobster. II. Sensory innervation of the olfactory lobe
Antennular projections to the midbrain of the spiny lobster. II. Sensory innervation of the olfactory lobe
复制标题
龙虾中脑的环状投射。
DOI：
10.1002/cne.903180306
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发表时间：
1992
影响因子：
2.5
通讯作者：
B. Ache
中科院分区：
文献类型：
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作者：
Manfred Schmidt;B. Ache
用生物胞素标记的触角神经轴突，研究了触角感觉传入纤维在棘龙虾嗅叶的投射方式。来自AN的外侧分支的薄的、假定的嗅觉传入在脑中形成一个束，该束分叉成一个致密的神经丛，该神经丛完全覆盖OL的肾小球皮质。细传入纤维（直径≤ 0.3-1 μm）多投射到单个肾小球。然而，大约10%的细传入纤维在神经丛中分支并投射到多个肾小球。少量中等大小至粗（直径2-10 μm）的传入纤维（可能是机械感觉性传入纤维）也支配OL，并与细传入纤维共同投射到多个肾小球。传入纤维在柱状肾小球内大量分支成非常细的突起，这些突起穿透到柱状体的基部，但选择性地终止于帽/亚帽区或柱状体基部的最内部，通常具有明显的终末终扣，形成两个不同的假定突触输出区域。这些结果表明：1）大部分的OL神经支配是由嗅觉感受器（感觉），但其他类型的感受器提供额外的，可能是机械感觉，输入OL。2)嗅觉传入纤维的投射并不是严格的单小球投射。3)柱状组织的甲壳动物嗅球是功能上的重要，并可能提供一个进化相关的最近提出的细分脊椎动物嗅球到“功能柱”。
The projection pattern of antennular sensory afferents in the olfactory lobe (OL) of the spiny lobster, Panulirus argus, was examined by backfilling axons in the antennular nerve (AN) with biocytin. Thin, presumptive olfactory afferents from the lateral division of the AN form a tract in the brain that diverges into a dense plexus that completely envelops the glomerular cortex of the OL. Most of the thin (diameter ≤ 0.3–1 μm) afferents project to single glomeruli. About 10% of the thin afferents, however, branch in the plexus and project to multiple glomeruli. A smaller number of medium‐sized to thick (diameter 2–10 μm), presumably mechanosensory, afferents also innervate the OL and co‐project to multiple glomeruli with the thin afferents. Afferents arborize profusely within the columnar glomeruli into very fine processes that penetrate to the base of the columns, but selectively terminate in either the cap/subcap region‐or in the innermost part of the base of the columns, often with conspicuous terminal boutons, forming two distinct regions of presumptive synaptic output. These results suggest that 1) The majority of the OL innervation is provided by olfactory sensilla (aesthetascs), but that other types of sensilla provide additional, likely mechanosensory, input to the OL. 2) The projection of olfactory afferents is not strictly uniglomerular. 3) The columnar organization of crustacean olfactory glomeruli is functionally significant and may provide an evolutionary correlate of the recently proposed subdivision of the vertebrate olfactory bulb into “functional columns”.
嗅觉系统：神经空间在非空间形态中的应用。
DOI：
--
发表时间：
1985
期刊：
Progress in clinical and biological research
影响因子：
--
作者：
Shepherd,GM
通讯作者：
Shepherd,GM