School of Health and Human Sciences, Southern Cross University, Lismore, New South Wales, Australia.
Gait Posture. 2011 Feb;33(2):169-78. doi: 10.1016/j.gaitpost.2010.12.008. Epub 2011 Jan 5.
The Hoffmann reflex (H-reflex) test has been extensively used to investigate the responsiveness of Ia afferent spinal loop in animal and human studies. The H-reflex response is influenced by multiple neural pathways and the assessment of H-reflex variation is a useful tool in understanding the neural mechanisms in control of movement. Recently, several studies have examined the relationship between the H-reflex modulation and postural stability. For example, it has been reported that the amplitude of soleus (SOL) H-reflex is depressed in relation to increased body sway during upright standing on a soft surface compared to that on a solid surface. It has been suggested that the SOL H-reflex modulation under such condition is predominately affected by the presynaptic inhibitory mechanisms for avoiding oversaturation of the spinal motoneurons. It has also been reported that after balance training, the SOL H-reflex amplitude is down-modulated in parallel with improvement in balance control, suggesting a functional adaptation at the supraspinal levels. The aim of this review is to examine the current literature on the relationship between H-reflex modulation and postural control for a better understanding of the physiological mechanisms involved in control of posture in humans.
Hoffmann 反射（H 反射）测试已广泛应用于动物和人类研究中，以研究 Ia 传入脊髓环路的反应性。H 反射反应受多种神经通路的影响，评估 H 反射变化是理解运动控制中神经机制的有用工具。最近，有几项研究探讨了 H 反射调制与姿势稳定性之间的关系。例如，据报道，与在固体表面相比，在柔软表面上直立站立时，由于身体摆动增加，比目鱼肌（SOL）H 反射的幅度会降低。有人认为，在这种情况下，SOL H 反射调制主要受避免脊髓运动神经元过度饱和的突触前抑制机制的影响。也有报道称，平衡训练后，SOL H 反射幅度与平衡控制的改善呈下调趋势，表明在上运动水平存在功能适应。本综述的目的是检查 H 反射调制与姿势控制之间的关系的现有文献，以更好地理解人类姿势控制中涉及的生理机制。
