On the origin of F-wave: involvement of central synaptic mechanisms

On the origin of F-wave: involvement of central synaptic mechanisms
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F波的起源:中枢突触机制的参与

DOI:
10.1101/2023.06.12.544675
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发表时间:
2023
期刊:
--
影响因子:
--
通讯作者:
Özyurt M
Özyurt M
中科院分区:
--
文献类型:
--
作者:
Özyurt M

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神经生理学方法被广泛用于获取神经退行性疾病中运动神经元兴奋性和轴突传导的信息。在神经系统疾病的诊断中,F波是一种常用的生物标志物,用于测试运动神经元的特性。尽管F波的起源仍有争议,但最广泛接受的机制是F波是由从外周反向刺激运动神经元产生的。在本研究中,我们制作了AneX活体小鼠坐骨神经连接脊髓标本,切断了感觉轴。在该标本中,刺激整个坐骨神经或其胫骨分支引起的反应与F波的电生理特征有关。通过去除细胞外钙或阻断突触后谷氨酸受体来控制突触传递,可以消除这些反应。这些结果表明,F波是通过谷氨酸能突触被经常性运动轴突支激活的脊髓微回路所介导的。
Neurophysiological methods are used widely to gain information about motor neuron excitability and axon conduction in neurodegenerative diseases. The F-wave is a common biomarker used to test motor neuron properties in the diagnosis of neurological diseases. Although the origin of the F-wave is a subject of debate, the most widely accepted mechanism posits that the F-wave is generated by the backfiring of motor neurons stimulated antidromically from the periphery.In this study, we developed anex vivomouse sciatic nerve-attached spinal cord preparation with sensory axons severed.In this preparation, stimulation of the whole sciatic nerve or its tibial branch evoked responses with the electrophysiological signatures of F-waves. Manipulations of synaptic transmission by either removal of extracellular calcium or block of post-synaptic glutamate receptors abolished these responses.These results suggest that F-waves are mediated by spinal microcircuits activated by recurrent motor axon collaterals via glutamatergic synapses.
DOI: 10.1371/journal.pbio.2003586
发表时间: 2018-03
期刊: PLoS biology
影响因子: 9.8
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DOI: --
发表时间: 1986
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