The role of intraspinal sensory neurons in the control of quadrupedal locomotion

The role of intraspinal sensory neurons in the control of quadrupedal locomotion
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椎管内感觉神经元在四足运动控制中的作用

DOI:
10.1101/2021.12.21.473311
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发表时间:
2021
期刊:
bioRxiv
影响因子:
--
通讯作者:
Zampieri
Zampieri
中科院分区:
--
文献类型:
--
作者:
Gerstmann;Jurčić;Wanaverbecq;Zampieri

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从游泳到散步和飞行,动物都进化出了特定的运动策略,以在不同的栖息地茁壮成长。所有类型的运动都依赖于运动指令和感觉信息的整合,以产生精确协调的运动。脑脊液接触神经元(CSF-CN)构成脊椎动物的感觉系统,监测脑脊液的成分和流量。在鱼类中,CSF-CN调节游泳活动,以响应pH的变化和脊髓的弯曲;然而,它们在哺乳动物中的作用尚不清楚。我们利用小鼠遗传学来研究它们在四足动物运动中的作用。我们发现,CSF-CN直接整合到脊髓运动神经回路中。脑脊液-CN功能的紊乱不影响一般运动活动,也不影响运动节律和模式的产生,而是导致熟练动作的特定缺陷。这些结果证实了小鼠CSF-CN在自适应运动控制中的作用,并表明这个感觉系统进化出了一种新的功能,以适应肢体运动的生物力学要求。
From swimming to walking and flying, animals have evolved specific locomotor strategies to thrive in different habitats. All types of locomotion depend on the integration of motor commands and sensory information to generate precisely coordinated movements. Cerebrospinal-fluid-contacting neurons (CSF-cN) constitute a vertebrate sensory system that monitors CSF composition and flow. In fish, CSF-cN modulate swimming activity in response to changes in pH and bending of the spinal cord; however, their role in mammals remains unknown. We used mouse genetics to study their function in quadrupedal locomotion. We found that CSF-cN are directly integrated into spinal motor circuits. The perturbation of CSF-cN function does not affect general motor activity nor the generation of locomotor rhythm and pattern but results in specific defects in skilled movements. These results identify a role for mouse CSF-cN in adaptive motor control and indicate that this sensory system evolved a novel function to accommodate the biomechanical requirements of limb-based locomotion.
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