Maronde U
Institut für Biologie, TU Berlin, Federal Republic of Germany.
J Comp Neurol. 1991 Jul 15;309(3):328-40. doi: 10.1002/cne.903090304.
The convergence of primary sensory neurons of the antennae, higher order visual interneurons, and antennal motoneurons was analysed with neuroanatomical techniques in the honeybee, Apis mellifera. The different modalities evoke specific antennal responses in this insect. Three different fluorescent dyes were applied successively in the same preparation in order to visualise the various fiber projections from the antennae and the lobula in the brain of the honeybee. Three neuropile areas where sensory fibers of the antennae overlap with visual projection neurons from the lobula were found. Within the posterior-median protocerebrum the antennal tract T6-1 comes in close vicinity to the lobula tract LoT-9 and to some other lobula fibers that cannot be assigned to a special tract. Antennal T6-3 fibers overlap with lobula LoT-7 neurons within the posterior protocerebrum more laterally. Antennal T5 fibers arborise in the dorsal lobe and show common projection sites with lobula LoT-3 neurons. The multimodal convergence in the three common neuropiles demonstrates that these areas are important centers for multimodal information processing between sensory, motor, and descending neurons in insects.
利用神经解剖学技术，对蜜蜂（Apis mellifera）触角的初级感觉神经元、高阶视觉中间神经元和触角运动神经元的汇聚情况进行了分析。在这种昆虫中，不同的感觉模态会引发特定的触角反应。为了观察蜜蜂大脑中来自触角和小叶的各种纤维投射，在同一标本中依次应用了三种不同的荧光染料。发现了触角的感觉纤维与来自小叶的视觉投射神经元重叠的三个神经纤维网区域。在中后原脑内，触角束T6-1与小叶束LoT-9以及一些无法归入特定束的其他小叶纤维紧邻。触角T6-3纤维在原脑后部更外侧与小叶LoT-7神经元重叠。触角T5纤维在背叶分支，并与小叶LoT-3神经元显示出共同的投射位点。这三个共同神经纤维网中的多模态汇聚表明，这些区域是昆虫感觉、运动和下行神经元之间多模态信息处理的重要中心。
