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斑马鱼在发育中的脊髓前运动抑制的有序区间映射

Sandeep Kishore¹, Eli B Cadoff¹, Moneeza A Agha¹

¹Department of Neurobiology, Northwestern University, Evanston, IL 60208, USA.

Science (New York, N.Y.)

|October 23, 2020

概括

斑马鱼的脊柱运动神经元电路以特定的顺序发展抑制连接,确保不同运动速度的精确运动输出. 从最快的运动到最慢的运动.

科学领域:

神经科学
发育生物学
发动机控制

背景情况:

脊椎动物的运动依赖于脊柱运动神经元的精确招募,以实现各种运动速度.
对于分级运动输出的前运动抑制电路的组织仍然不太清楚.

研究的目的:

调查前运动抑制电路如何组织以控制不同运动速度的脊柱运动输出.
阐明这些电路形成的发展机制.

主要方法:

用斑马鱼作为研究神经电路发展的模型生物.
研究了小管内神经元发育和微电路形成的时间序列.
评估不同类型微电路的抑制强度和招募顺序.

主要成果:

斑马鱼在发育过程中形成分隔式微电路.
轴突微电路首先形成,为快速运动提供强大的抑制作用.
接下来是围体和树突微电路,为较慢的运动提供分级的抑制.

结论:

神经元发育中的时间序列转化为阻断性连接的空间模式.
这种"本位体"组织提供了一种有效的解决方案,用于在各种运动速度中塑造脊柱运动输出.

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