Somatotopic map of the active electrosensory sense in the midbrain of the mormyrid Gnathonemus petersii

Somatotopic map of the active electrosensory sense in the midbrain of the mormyrid Gnathonemus petersii
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鳢鱼中脑主动电感觉的体位图

DOI:
10.1002/cne.23963
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发表时间:
2016
影响因子:
2.5
通讯作者:
J. Engelmann
J. Engelmann
中科院分区:
医学3区
文献类型:
--
作者:
V. Hollmann;V. Hofmann;J. Engelmann

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在许多脊椎动物中,在地形有序的地图上进行并行处理对于有效的感觉处理是必不可少的。在活动的电感觉通路的mormyrids传入的输入处理在两个平行的躯体位置有序的后脑地图的电感觉外侧线叶(ELL),背外侧区(DLZ),和内侧区(MZ)。这里,自生电场的相位和振幅调制被单独处理。行为数据表明,这些信息必须合并的感觉系统,以分类区分对象的电容和电阻属性。虽然已经发现了ELL的两个区域之间的投影,但现有的生理数据表明,这种合并发生在中脑枕叶(TS)。以前的解剖学数据表明,详细的躯体位置表示目前在ELL是失去了外侧核(NL)的TS,而粗略的rostrocaudal映射保持。在我们的研究中,我们使用示踪剂注射更详细地研究了从后脑到中脑的投射。我们的数据显示,传入的ELL的两个地图终止在一个详细的躯体定位的方式在中脑NL。此外,我们提供的数据表明,相位和幅度信息确实可以联合处理的NL。神经学比较杂志524:2479-2491,2016.© 2016 Wiley Periodicals,Inc.
In many vertebrates parallel processing in topographically ordered maps is essential for efficient sensory processing. In the active electrosensory pathway of mormyrids afferent input is processed in two parallel somatotopically ordered hindbrain maps of the electrosensory lateral line lobe (ELL), the dorsolateral zone (DLZ), and the medial zone (MZ). Here phase and amplitude modulations of the self‐generated electric field were processed separately. Behavioral data indicates that this information must be merged for the sensory system to categorically distinguish capacitive and resistive properties of objects. While projections between both zones of the ELL have been found, the available physiological data suggests that this merging takes place in the midbrain torus semicircularis (TS). Previous anatomical data indicate that the detailed somatotopic representation present in the ELL is lost in the nucleus lateralis (NL) of the TS, while a rough rostrocaudal mapping is maintained. In our study we investigated the projections from the hindbrain to the midbrain in more detail, using tracer injections. Our data reveals that afferents from both maps of the ELL terminate in a detailed somatotopic manner within the midbrain NL. Furthermore, we provide data indicating that phase and amplitude information may indeed be processed jointly in the NL. J. Comp. Neurol. 524:2479–2491, 2016. © 2016 Wiley Periodicals, Inc.
DOI: --
发表时间: 1973
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