• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >ON THE TENDON JERK REFLEX IN THE HUMAN NEONATE (EMG, SPINAL CORD, STRETCH REFLEX).
【24h】

ON THE TENDON JERK REFLEX IN THE HUMAN NEONATE (EMG, SPINAL CORD, STRETCH REFLEX).

机译：关于人类新生儿腱腱反射（EMG，脊髓，弹力反射）。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Tendon jerk reflexes were tested in normal full-term neonates, 1 to 4 days old. Surface EMG recordings were made from the soleus muscle and its antagonist, tibialis anterior. While the neonate was in the supine position, taps were manually applied to the tendons of the soleus, tibialis anterior, and quadriceps muscles, the sole of the foot and the medial malleolus. For each tendon jerk response, 100 milliseconds of EMG data were recorded on a computer, with the state of consciousness of the infant and the force of hammer tap. Reflex EMG latencies and amplitudes were measured for each tapsite. Medians, means, standard deviations and cross-correlations were computed for each study variable.;Reflex-like EMGs were evoked by tapping sites not normally thought to excite muscle spindle afferents to the responding motoneuron pools. For example, the tibialis anterior muscle often responded strongly to Achilles and patellar tendon taps. The simultaneous activation of antagonist muscles by tendon taps in neonates is a novel finding. While other possible physiological and artifactual mechanisms are discussed, it is hypothesized that monosynaptic pathways of the spinal cord other than those classically described may contribute to these findings. Reciprocal excitation, a functional spinal cord pathway, has been proposed to explain these data; it is in contrast with the commonly accepted anatomical pathway of reciprocal inhibition. In the normal neonate, reciprocal excitation may be masked or eliminated in normal development. In perinatal injuries, the reciprocally excitatory pathway may be fostered to persist. Finally, in cervical spondylosis, reciprocal excitation may develop or become unmasked during progressive spinal cord obstruction.;Responses of normal neonates to tendon taps contrasted with the normal adult. Achilles tendon taps consistently evoked almost simultaneous EMG bursts from soleus and tibialis anterior muscles. The amplitudes of the tibialis anterior EMGs were comparable to the soleus responses. The EMG responses from the two antagonist muscles were nearly simultaneous. The latencies were consistent with a monosynaptic conduction delay.
机译：在1至4天的正常足月新生儿中测试了肌腱突触反射。表面肌电图记录来自比目鱼肌及其拮抗剂胫前肌。当新生儿处于仰卧位时，手动将水龙头施加到比目鱼肌，胫骨前肌和股四头肌，足底和内踝的肌腱上。对于每一次肌腱抽动反应，将100毫秒的EMG数据记录在计算机上，同时记录婴儿的意识状态和敲击锤的力量。对每个抽头部位测量反射肌电图潜伏期和振幅。计算每个研究变量的中位数，均值，标准差和互相关性。轻敲通常不认为会刺激反应性运动神经元池的肌肉纺锤传入的部位，诱发出类似反射的EMG。例如，胫骨前肌经常对跟腱和pa腱点击产生强烈反应。新生儿的肌腱拍击同时激活拮抗肌是一个新发现。虽然讨论了其他可能的生理机制和人为机制，但据推测，除经典描述的那些以外，脊髓的单突触途径可能有助于这些发现。已经提出了相互刺激，一种功能性脊髓途径，来解释这些数据。它与通常公认的相互抑制的解剖学途径相反。在正常的新生儿中，在正常发育中可能会掩盖或消除相互的兴奋。在围产期损伤中，双向兴奋性途径可能会持续存在。最后，在颈椎病中，在进行性脊髓梗阻过程中可能会出现相互兴奋或被掩盖的现象；与正常成年人相比，正常新生儿对肌腱轻拍的反应。跟腱腱持续不断地引起比目鱼肌和胫骨前肌几乎同时发生肌电图爆发。胫骨前肌电图的幅度与比目鱼肌反应相当。来自两个拮抗肌的肌电反应几乎同时发生。潜伏期与单突触传导延迟一致。

著录项

  • 作者

    MYKLEBUST, BARBARA M.;

  • 作者单位

    Rush University, College of Health Sciences.;

  • 授予单位 Rush University, College of Health Sciences.;
  • 学科 Animal Physiology.;Developmental biology.
  • 学位 Ph.D.
  • 年度 1986
  • 页码 299 p.
  • 总页数 299
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号