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Neuroscience Bulletin

, Volume 26, Issue 2, pp 147–152 | Cite as

Sexual dimorphism of the electrophysiological properties of the projection neurons in the robust nucleus of the arcopallium in adult zebra finches

  • Xiao-Lin Liu (刘晓琳)
  • Guo-Qiang Hou (侯国强)
  • Su-Qun Liao (廖素群)
  • Dong-Feng Li (李东风)Email author
Original Article

Abstract

Objective

To observe the sexual differences in electrophysiological properties of neurons in the robust nucleus of the arcopallium (RA) in adult zebra finches, and to provide the direct electrophysiological evidence for the sexual dimorphism of birdsong.

Methods

Whole-cell recording was used to record the spontaneous action potential firing rates from RA projection neurons in acute brain slices.

Results

The projection neurons of RA in male birds fired spontaneously at 10 Hz or above, while in female birds, the frequency was significantly lower, and even no firings could be detected.

Conclusion

There is a sexual difference in electrophysiological properties of projection neurons in RA, which may result from the difference in the levels of steroid hormones in birds.

Keywords

adult zebra finches the robust nucleus of the arcopallium spontaneous action potential firing rates electrophysiological properties sexual dimorphism 

成年斑胸草雀弓状皮质栎核投射神经元电生理特性的性别二态性

摘要

目的

通过观察神经元在电生理特性方面的性别差异, 为鸣禽鸣唱行为性别二态性提供新证据。

方法

采用脑片膜片钳全细胞模式, 记录成年斑胸草雀弓状皮质栎核(RA)投射神经元的动作电位自发放。

结果

雄鸟RA核团投射神经元均有一定频率的自发放, 且多数神经元的自发放频率超过10 Hz。 而雌鸟RA核团投射神经元的自发放频率相对较低, 甚至无自发放。

结论

成年斑胸草雀RA 核团神经元的电生理特性存在较大的性别差异。 导致这种发放活动差异的主要原因可能是雌雄鸣禽体内及相关脑区激素水平的差异。

关键词

成年斑胸草雀 弓状皮质栎核 动作电位自发放频率 电生理特性 性别二态性 

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Copyright information

© Shanghai Institutes for Biological Sciences, CAS and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Xiao-Lin Liu (刘晓琳)
    • 1
  • Guo-Qiang Hou (侯国强)
    • 1
  • Su-Qun Liao (廖素群)
    • 1
  • Dong-Feng Li (李东风)
    • 1
    Email author
  1. 1.College of Life ScienceSouth China Normal University, Key Laboratory of Ecology and Environmental Science in Higher Education of Guangdong ProvinceGuangzhouChina

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