Similarities and differences of the soleus and gastrocnemius H-reflexes during varied body postures, foot positions, and muscle function: multifactor designs for repeated measures.
Similarities and differences of the soleus and gastrocnemius H-reflexes during varied body postures, foot positions, and muscle function: multifactor designs for repeated measures.
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DOI：
10.1186/1471-2377-11-65
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发表时间：
2011-06-02
期刊：
影响因子：
2.6
通讯作者：
Etnyre B
中科院分区：
文献类型：
--
作者：
Alrowayeh HN;Sabbahi MA;Etnyre B
虽然比目鱼肌（Sol）、内侧腓肠肌（MG）和外侧腓肠肌（LG）肌肉在功能、组成和神经支配方面不同，但通常的做法是将它们作为单个H反射记录进行研究。本研究的目的是比较H-反射记录这三个部分的小腿三头肌肌肉群的健康参与者，而躺在和站在三个不同的脚踝位置。10名受试者在俯卧和站立时，踝关节处于中性、最大背屈和最大跖屈位置，记录了Sol、MG和LG肌肉的H反射。对于每种条件组合，对四个迹线进行平均。采用三因素方差分析（姿势X踝关节位置X肌肉）和计划比较进行统计学比较。虽然H反射在三个肌肉部分的潜伏期和振幅不同，其依赖姿势和踝关节的位置是相似的。所有肌肉的H反射振幅和最大H反射与M反应（H/M）比值均显著：1）站立时踝关节处于中立位时低于躺卧时，2）站立时踝关节处于跖屈位时高于中立位时，3）躺卧和站立时踝关节处于背屈位时低于中立位时（p ≤ .05）。在明显不同的姿势和踝关节运动任务期间，需要不同的需求来激活肌肉。
Although the soleus (Sol), medial gastrocnemius (MG), and lateral gastrocnemius (LG) muscles differ in function, composition, and innervations, it is a common practice is to investigate them as single H-reflex recording. The purpose of this study was to compare H-reflex recordings between these three sections of the triceps surae muscle group of healthy participants while lying and standing during three different ankle positions. The Sol, MG and LG muscles' H-reflexes were recorded from ten participants during prone lying and standing with the ankle in neutral, maximum dorsiflexion, and maximum plantarflexion positions. Four traces were averaged for each combination of conditions. Three-way ANOVAs (posture X ankle position X muscle) with planned comparisons were used for statistical comparisons. Although the H-reflex in the three muscle sections differed in latency and amplitude, its dependency on posture and ankle position was similar. The H-reflex amplitudes and maximum H-reflex to M-response (H/M) ratios were significantly 1) lower during standing compared to lying with the ankle in neutral, 2) greater during standing with the ankle in plantarflexion compared to neutral, and 3) less with the ankle in dorsiflexion compared to neutral during lying and standing for all muscles (p ≤ .05). Varying demands are required for muscles activated during distinctly different postures and ankle movement tasks.