AXONAL CONNECTIONS OF A FOREBRAIN NUCLEUS INVOLVED WITH VOCAL LEARNING IN ZEBRA FINCHES
AXONAL CONNECTIONS OF A FOREBRAIN NUCLEUS INVOLVED WITH VOCAL LEARNING IN ZEBRA FINCHES
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DOI：
10.1002/cne.902790211
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发表时间：
1989-01-08
影响因子：
2.5
通讯作者：
MIESNER, EA
中科院分区：
文献类型：
--
作者：
BOTTJER, SW;HALSEMA, KA;MIESNER, EA
本文研究了成年雄性斑雀的端脑发声控制核--新纹状体前外侧大细胞核(IMAN)的联系。辣根过氧化物酶的顺行运输(单独或与麦胚凝集素结合)显示，IMAN内的神经元投射到另一前脑鸣叫控制核--粗壮的原始体核(RA)。众所周知，RA投射到支配发声器官的舌下运动神经元上。从伊曼标记的大丘脑核逆行运输HRP，丘脑背外侧核(DLM)的内侧部分。DLm接着从歌曲控制系统的另一个核团，即副嗅叶的X区接受输入。我们证实了先前研究的结果，即X区接受来自中脑Tsai腹侧区(AVT)的投射。此外，我们复制了以前对金丝雀的实验结果，结果表明，歌曲控制核HVC(腹侧上纹状体尾侧核)接受三个来源的输入：新层前内侧大细胞核(Mman)、界面核(Nif)和丘脑葡萄状核(Uva)。HVC神经元投射到X区和RA。总而言之，有一条路径从中脑AVT到X区，再到DLm，然后到IMAN；HVC投射到X，从而间接投射到IMAN。我们还不知道AVT的传入联系。因此，IMAN接受来自各种其他来源的间接输入，包括已知的与发声控制有关的其他区域。
Connections of a telencephalic vocal-control nucleus, the lateral magnocellular nucleus of the anterior neostriatum (IMAN), were studied in adult male zebra finches. Anterograde transport of horseradish peroxidase (alone or conjugated to wheat germ agglutinin) revealed that neurons in IMAN project to another forebrain song-control nucleus, the robust nucleus of the archistriatum (RA). RA is known to project onto the hypoglossal motor neurons that innervate the vocal organ. Retrograde transport of HRP from IMAN labeled a large thalamic nucleus, the medial portion of the dorsolateral nucleus of the thalamus (DLM). DLM in turn receives input from another nucleus of the song-control system, areas X of the parolfactory lobe. We confirmed results of previous studies showing that area X receives a projection from the ventral area of Tsai (AVT) in the midbrain. In addition, we replicated results of previous experiments with canaries showing that the song-control nucleus HVc (caudal nucleus of the ventral hyperstriatum) receives input from three sources: the medial magnocellular nucleus of the anterior neostratiatum (mMAN), the interfacial nucleus (NIf), and the uvaeform nucleus (Uva) of the thalamus. HVc neurons project to area X and to RA. In summary, there is a path from AVT in the midbrain, to area X, to DLM, and then to IMAN; HVc projects to X and hence indirectly to IMAN. We do not yet know the afferent connections of AVT. Thus, IMAN receives indirect input from a variety of other sources, including other regions known to be involved with vocal control.