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首页> 外文期刊>The European Journal of Neuroscience >The nociceptive withdrawal reflex of the trunk is organized with unique muscle receptive fields and motor strategies
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The nociceptive withdrawal reflex of the trunk is organized with unique muscle receptive fields and motor strategies

机译：树干的伤害戒断反射是用独特的肌肉接收领域和电机策略组织的

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摘要

Noxious stimuli induce a nociceptive withdrawal reflex (NWR) to protect the tissue from injury. Although the NWR was once considered as a stereotyped response, previous studies report distinct responses depending on the stimulation site and context for limbs. We aimed to determine whether noxious stimuli over the trunk produced adaptable complex NWR. We hypothesized that organization of the NWR of the trunk muscle would vary with the site of noxious input and would differ between body and spine postures, which modify the potential for specific muscles to remove threat. Fourteen participants were tested in sitting and three lumbar spine postures in side lying (neutral, flexion and extension). Noxious electrical stimuli were applied over the sacrum, spinous process of L3 and T12, lateral side of the 8th rib and anterior midline. NWR latency and amplitude were recorded with surface electromyography (EMG) electrodes over different trunk muscles. Distinct patterns of muscle activation depended on the stimulation site and were consistent with motor strategies needed to withdraw from the noxious stimuli. The NWR pattern differed between body positions, with less modulation observed in sitting than side lying. Spine posture did not affect the NWR organisation. Our results suggest the circuits controlling trunk muscle NWR presents with adaptability as a function of stimulation site and body position by utilizing the great complexity of the trunk muscle system to produce an efficient protective response. This suggests that the central nervous system (CNS) uses multiple adaptable strategies that are unique depending on which context the noxious stimuli are applied.
机译：有害刺激诱导伤害戒断反射（NWR）以保护组织免受损伤。虽然NWR曾经被认为是刻板印象的反应，但之前的研究报告了根据刺激现场和肢体的背景报告了不同的反应。我们旨在确定躯干上的有害刺激是否产生适应性的复杂NWR。我们假设树干肌肉的NWR组织与有害投入的网站会有所不同，并且身体和脊柱姿势之间的不同情况会改变特定肌肉的潜力去除威胁。十四名参与者在坐着和三个腰椎姿势（中性，屈曲和延伸）中进行了测试。在骶骨，L3和T12，第8肋的侧面和前侧中线的骶骨过程中施加有害的电刺激。在不同的躯干肌肉上用表面肌电图（EMG）电极记录NWR延迟和幅度。肌肉激活的明显模式依赖于刺激位置，并与退出有害刺激所需的电机策略一致。正文位置之间的NWR模式不同，在坐姿比侧面侧观察到较少的调制。脊柱姿势没有影响NWR组织。我们的结果表明，通过利用躯干肌肉系统的巨大复杂性来产生高效的保护响应，电路控制中继肌NWR的函数随着刺激位置和身体位置的函数。这表明中枢神经系统（CNS）使用多种可适应的策略，这取决于应用有害刺激的上下文。

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