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V1 spinal neurons regulate the speed of vertebrate locomotor outputs.

机译:V1脊髓神经元调节脊椎动物运动输出的速度。

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The neuronal networks that generate vertebrate movements such as walking and swimming are embedded in the spinal cord. These networks, which are referred to as central pattern generators (CPGs), are ideal systems for determining how ensembles of neurons generate simple behavioural outputs. In spite of efforts to address the organization of the locomotor CPG in walking animals, little is known about the identity and function of the spinal interneuron cell types that contribute to these locomotor networks. Here we use four complementary genetic approaches to directly address the function of mouse V1 neurons, a class of local circuit inhibitory interneurons that selectively express the transcription factor Engrailed1. Our results show that V1 neurons shape motor outputs during locomotion and are required for generating 'fast' motor bursting. These findings outline an important role for inhibition in regulating the frequency of the locomotor CPG rhythm, and also suggest that V1 neurons may have an evolutionarily conserved role in controlling the speed of vertebrate locomotor movements.
机译:产生脊椎动物运动(如行走和游泳)的神经元网络被嵌入脊髓中。这些网络称为中央模式生成器(CPG),是确定神经元集合如何生成简单行为输出的理想系统。尽管努力解决步行动物中运动性CPG的组织问题,但对于促成这些运动性网络的脊髓中间神经元细胞类型的身份和功能了解甚少。在这里,我们使用四种互补的遗传方法直接解决小鼠V1神经元的功能,这是一类局部回路抑制性中间神经元,可选择性表达转录因子Engrailed1。我们的结果表明,V1神经元在运动过程中影响运动输出,是产生“快速”运动爆发所必需的。这些发现概述了抑制调节CPG运动频率的重要作用,并且还表明V1神经元在控制脊椎动物运动速度方面可能具有进化上的保守作用。

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