In rat and guinea pig, cochlear efferents to the two ears were labeled simultaneously with different fluorescent tracers. It was found that in both species only few (1-3%) olivo-cochlear neurons were double-labeled and project to both cochleae. In most periolivary regions large olivocochlear neurons (OCN) projecting to the ipsilateral and contralateral side are intermingled and form a continuous cell column between the facial nucleus and lateral lemniscus. In a second series of experiments in rat, cochlear efferents and ascending olivo-collicular neurons were labeled. Olivo-cochlear and olivo-collicular neurons are intermingled in the lateral superior olive (LSO) and in the ventromedial periolivary region. No double-labeled neurons were found that project to the cochlea and the inferior colliculus.

译文

在大鼠和豚鼠中,用不同的荧光示踪剂同时标记两只耳朵的耳蜗传出。发现在这两个物种中,只有很少(1-3%)的双耳耳蜗神经元被标记并投射到两个耳蜗上。在大多数橄榄周区域,大型的乳突神经元(OCN)伸向同侧和对侧,并混合在一起,并在面核和侧列鞭毛虫之间形成连续的细胞列。在大鼠的第二系列实验中,标记了耳蜗传出和上升的脂-皮质神经元。橄榄树耳蜗和橄榄树皮质神经元混合在上外侧橄榄(LSO)和腹膜腹膜周围区域。没有发现双标记的神经元投射到耳蜗和下丘脑。

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