慢性脊髓损伤患者的比目鱼肌H反射募集未发生改变。
Soleus H-reflex recruitment is not altered in persons with chronic spinal cord injury.
作者信息
Schindler-Ivens Sheila M, Shields Richard K
机构信息
Graduate Program in Physical Therapy and Rehabilitation Science, University of Iowa, Iowa City, IA, USA.
出版信息
Arch Phys Med Rehabil. 2004 May;85(5):840-7. doi: 10.1016/j.apmr.2003.08.087.
OBJECTIVE
To determine whether spasticity in persons with spinal cord injury (SCI) is associated with elevated monosynaptic reflex excitability.
DESIGN
One-way experimental.
SETTING
Research laboratory.
PARTICIPANTS
Convenience sample of 9 subjects (8 men, 1 woman) with chronic and complete SCI and 20 persons (14 men, 6 women) with no neurologic impairment. Subjects with SCI exhibited lower-extremity spasticity as indicated by velocity-dependent increased resistance to passive muscle stretch, abnormally brisk deep tendon reflexes, involuntary lower-extremity flexion and/or extension spasms, and clonus.
INTERVENTION
Soleus H-reflex recruitment curves were elicited in all subjects.
MAIN OUTCOME MEASURES
Soleus H-reflex threshold (HTH), gain (HGN), and amplitude (HPP).
RESULTS
There was no difference between subjects with and without SCI in HTH, HGN, or HPP.
CONCLUSIONS
Spasticity in people with chronic and complete SCI was not associated with increased excitability of the connections between Ia afferent projections and motoneurons. Factors extrinsic to these connections may have a role in spasticity caused by SCI.
目的
确定脊髓损伤（SCI）患者的痉挛是否与单突触反射兴奋性升高有关。
设计
单向实验。
设置
研究实验室。
参与者
9名慢性完全性SCI患者（8名男性，1名女性）和20名无神经功能障碍者（14名男性，6名女性）的便利样本。SCI患者表现出下肢痉挛，表现为被动肌肉拉伸时速度依赖性阻力增加、异常活跃的深腱反射、下肢非自愿屈曲和/或伸展痉挛以及阵挛。
干预
对所有受试者引出比目鱼肌H反射募集曲线。
主要观察指标
比目鱼肌H反射阈值（HTH）、增益（HGN）和幅度（HPP）。
结果
有无SCI的受试者在HTH、HGN或HPP方面无差异。
结论
慢性完全性SCI患者的痉挛与Ia传入投射和运动神经元之间连接的兴奋性增加无关。这些连接之外的因素可能在SCI引起的痉挛中起作用。
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