Neuroanatomical properties of 'time comparison circuit' in weakly electric fishes

弱电鱼“时间比较电路”的神经解剖学特性

• 批准号: 22570073
• 负责人: MATSUSHITA Atsuko
• 金额: $ 3万
• 依托单位: The Graduate University for Advanced Studies
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22570073/
• 关键词: 弱電気魚; 神経伝達物質; 時間情報; 抑制性シナプス; 聴覚系; 時間感覚; 免疫組織化学; 比較神経解剖学; 国際研究者交流 米国バージニア; 神経会達物質; Calyx of Held

Weakly electric fish shows behavioral sensitivity to microsecond time difference between electrosensory signals from different body areas. The hypothetical time comparison circuit consists oftwo types of time-coding neurons and a small cell, to which the two time-coding neurons converged. Here I studied the type of synaptic transmission in the time-coding circuit in two species. I immunohistochemically found that one of the inputs of the time-coding neuron is inhibitory in Gymnarchus (mormyriform). However, in Brachyhypopomus (gymnotiform), conventional electron microscopy showed that both inputs are excitatory. This comparative analysis revealed that the topologies of time coding neurons are identical in all major groups of other weakly electric fishes so far studied. However, the modes of synaptic transmission to the small cell, a time comparator, are different between species.

弱电鱼对来自不同身体区域的电感觉信号之间的微秒时间差表现出行为敏感性。假设的时间比较电路由两种时间编码神经元和一个小单元组成，两种时间编码神经元会聚到一个小单元。在这里，我研究了两个物种的时间编码回路中的突触传递类型。我用化学方法发现，在裸腹鱼（形目）中，时间编码神经元的一个输入是抑制性的。然而，在Brachyhypopomus（gymnotiform），传统的电子显微镜显示，这两个输入是兴奋的。这种比较分析表明，时间编码神经元的拓扑结构是相同的，在所有主要群体的其他弱电鱼类到目前为止研究。然而，突触传递到小细胞（时间比较器）的模式在物种之间是不同的。

项目成果

Rhabdom evolution in butterflies: insights from the uniquely tiered and heterogeneous ommatidia of the Glacial Apollo butterfly, Parnassius glacialis

• DOI: 10.1098/rspb.2012.0475
• 发表时间: 2012-09
• 期刊: Proceedings of the Royal Society B: Biological Sciences
• 作者: A. Matsushita;Hiroko Awata;M. Wakakuwa;Shin-ya Takemura;K. Arikawa

Histological studies for time-coding pathway in pulse-type Gymnotiform fish, Brachyhypopomus gauderio

脉冲型裸甲鱼 Brachyhypopomus gauderio 时间编码途径的组织学研究

• 发表时间: 2010
• 作者: Matsushita A;Kawasaki M
• 通讯作者: Kawasaki M

Glass scales on the wing of the swordtail butterfly Graphium sarpedon act as thin film polarizing reflectors

• DOI: 10.1242/jeb.066902
• 发表时间: 2012-02
• 期刊: Journal of Experimental Biology
• 影响因子: 2.8
• 作者: D. Stavenga;A. Matsushita;K. Arikawa;H. Leertouwer;B. Wilts

Histological studies for time-coding pathway in pulse-type Gymnotiform fish

脉冲型裸甲鱼时间编码途径的组织学研究

• 发表时间: 2010
• 作者: Matsushita A;Kawasaki M
• 通讯作者: Kawasaki M

Eyes with basic dorsal and specific ventral regions in the glacial Apollo, Parnassius glacialis (Papilionidae)

• DOI: 10.1242/jeb.048678
• 发表时间: 2010-12-01
• 期刊: JOURNAL OF EXPERIMENTAL BIOLOGY
• 影响因子: 2.8
• 作者: Awata, Hiroko;Matsushita, Atsuko;Arikawa, Kentaro
• 通讯作者: Arikawa, Kentaro