Human walking along a curved path. II. Gait features and EMG patterns
Human walking along a curved path. II. Gait features and EMG patterns
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DOI：
10.1046/j.1460-9568.2003.02737.x
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发表时间：
2003-07-01
影响因子：
3.4
通讯作者：
Schieppati, M
中科院分区：
文献类型：
--
作者：
Courtine, G;Schieppati, M
我们记录了基本的步态特征和相关的腿部肌肉活动模式，发生在连续的身体进展时，人类走沿着一个弯曲的轨迹，以深入了解控制的两条腿的不对称运动的神经机制。尽管内、外步幅的长度不同，但传播到两腿的节律相同（P < 0.001）。内腿和外腿之间的肢体位移存在相位滞后，占总周期持续时间的7%（P = 0.0001）。外足摆动速度大于内足（P < 0.001）。站立期的持续时间在外侧腿和内侧腿分别减少和增加（P < 0.01），并且与躯干向路径内侧倾斜有关。站立时比目鱼肌爆发的幅度在外侧腿增加（P < 0.05），内侧腿降低（P < 0.05），但时间无变化。摆动期双侧胫骨前肌活动增加（P < 0.05），外侧提前，内侧延迟（P < 0.01;占周期的2%）。两条腿的腓骨长肌爆发都减少了，但内腿比外腿更多，并且在摆动开始时内腿持续时间更长。闭上眼睛并不影响步态模式和肌肉活动在转身。沿着弯曲路径沿着行走的命令可以利用脊髓运动发生器的基本机制，从而限制转弯的计算成本。
We recorded basic gait features and associated patterns of leg muscle activity, occurring during continuous body progression when humans walked along a curved trajectory, in order to gain insight into the nervous mechanisms underlying the control of the asymmetric movements of the two legs. The same rhythm was propagated to both legs, in spite of inner and outer strides diverging in length (P < 0.001). There was a phase lag in limb displacement between the inner and outer leg of 7% of the total cycle duration (P = 0.0001). Swing velocity was greater for outer than inner foot (P < 0.001). The duration of the stance phase diminished and increased in the outer and inner leg (P < 0.01), respectively, and was associated with trunk leaning toward the inside of the path. Muscle activity was not dramatically altered during curved walking. The amplitude of soleus burst during stance increased in the outer (P < 0.05) and decreased in the inner leg (P < 0.05), without changes in timing. Tibialis anterior activity increased in both legs during the swing phase (P < 0.05); it was advanced on the outer and delayed on the inner side (P < 0.01; 2% of the cycle). The peroneus longus burst decreased in both legs, but more in the inner than the outer leg, and lasted longer in the inner leg at the onset of swing. Closing the eyes did not affect the gait pattern and muscle activity during turning. The command to walk along a curved path may exploit the basic mechanisms of the spinal locomotor generator, thereby limiting the computational cost of turning.