Continuous, bilateral Achilles' tendon vibration is not detrimental to human walk
Continuous, bilateral Achilles' tendon vibration is not detrimental to human walk
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DOI：
10.1016/s0361-9230(01)00504-4
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发表时间：
2001-05-01
影响因子：
3.8
通讯作者：
Schieppati, M
中科院分区：
文献类型：
--
作者：
Courtine, G;Pozzo, T;Schieppati, M
来自运动肢体的感觉反馈有助于调节动物和人类的运动。然而，各种方式的具体作用的问题仍然是开放的，此外，由于周围神经病变而导致的腿部传入纤维的功能丧失并不总是导致步态模式的重大改变。为了进一步了解人体步态的本体感觉控制，我们在正常自由行的过程中对双侧小腿三头肌进行了振动肌腱刺激，已知的是招募纺锤体初级传入纤维。这一过程会扰乱行走的组织和执行，特别是当纺锤持续发射并且受试者被蒙住眼睛的情况下。振动引起了站立和摆动阶段的持续时间和长度的显著变化，尽管变化很小。以及步行速度和肢体节段的运动学。没有对踝关节或躯干的角位移和头部运动学产生影响，这种影响的缺乏与受试者的看法不同，受试者报告了腿部僵硬和步态失衡的错觉，这些发现将表明在运动过程中选择性地控制LA输入，并强调中枢神经系统可以应对来自关键肌肉(如比目鱼肌)的LA纤维的不寻常的持续输入。(C)2001年爱思唯尔科学公司。
Sensory feedback from the moving limbs contributes to the regulation of animal and human locomotion. However, the question of the specific role of the various modalities is still open, Further, functional loss of leg afferent fibres due to peripheral neuropathy does not always lead to major alteration in the gait pattern. In order to gain further insight on proprioceptive control of human gait, we applied vibratory tendon stimulation, known to recruit spindle primary afferent fibres, to both triceps surae muscles during normal floor walk. This procedure would disturb organisation and execution of walking, especially if spindles fire continuously and subjects are blindfolded. Vibration induced significant, though minor, changes in duration and length of stance and swing phase. and on speed of walking and kinematics of lower limb segments. No effect was induced on angular displacement of the ankle joint or trunk and head kinematics, This paucity of effects was at variance with the perception of the subjects, who reported illusion of leg stiffness and gait imbalance, These findings would speak for a selective gating of la input during locomotion and emphasise the notion that the central nervous system can cope with an unusual continuous input along the la fibres from a key muscle like the soleus. (C) 2001 Elsevier Science Inc.