AFFERENT NEURONS IN THE HYPOGLOSSAL NERVE OF THE ZEBRA FINCH (POEPHILA-GUTTATA) - LOCALIZATION WITH HORSERADISH-PEROXIDASE
AFFERENT NEURONS IN THE HYPOGLOSSAL NERVE OF THE ZEBRA FINCH (POEPHILA-GUTTATA) - LOCALIZATION WITH HORSERADISH-PEROXIDASE
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DOI：
10.1002/cne.902100209
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发表时间：
1982-01-01
影响因子：
2.5
通讯作者：
ARNOLD, AP
中科院分区：
文献类型：
--
作者：
BOTTJER, SW;ARNOLD, AP
已知舌下神经传出纤维支配鸣禽的发声器官（鸣管）。为确定斑胸草雀喉洞传入纤维的存在，将辣根过氧化物酶（HRP）应用于支配喉洞左侧的舌下神经的外周分支。标记左侧迷走神经神经节中的细胞体，但在1-5天的运输间隔中未观察到跨神经节（顺行）运输进入CNS。(In比较，将HRP应用于切断的迷走神经降分支，在迷走神经节中产生标记的细胞体以及延伸到孤核中的重顺行标记）。将HRP与麦胚凝集素偶联注射到固有腱鞘肌中也标记了迷走神经节中的细胞体，并且再次没有观察到跨神经节标记。HRP更接近切断舌下神经干导致标记的细胞体在迷走神经节中的外观，以及顺行标签从三叉神经降束延伸到V的主要感觉核。舌下神经传入有细胞体在迷走神经节中，进入延髓背侧与迷走神经纤维和终止于三叉神经复合体。这些传入纤维的识别提出了它们在声乐学习中的作用的重要问题。
Hypoglossal efferent fibers are known to innervate the vocal organ (syrinx) in songbirds. To determine the existence of afferent fibers from the syrinx in the zebra finch, horseradish peroxidase (HRP) was applied to the cut peripheral branch of the hypoglossal nerve that innervates the left sise of the syrinx. Cell bodies in the ganglion of the left vagus nerve were labeled, but no transganglionic (anterograde) transport into the CNS was observed at transport intervals of 1-5 days. (In comparison, applying HRP to the cut descending branch of the vagus produced labeled cell bodies in the vagal ganglion as well as heavy anterograde label extending into the solitary nucleus). Injecition of HRP conjugated to wheat germ agglutinin into the intrinsic syringeal muscles also labeled cell bodies in the vagal ganglion and again no transganglionic label was observed. Applicaiton of HRP more proximally to the cut hypoglossal trunk resulted in the appearance of labeled cell bodies in the vagal ganglion as well as anterograde label extending from the descending trigeminal tract to the principal sensory nucleus of V. Hypoglossal afferents have cell bodies in the vagal ganglion, enter the medulla dorsally with vagal fibers and terminate in the trigeminal complex. The identification of these afferent fibers raises the important question of their role in vocal learning.