Foot sole and ankle muscle inputs contribute jointly to human erect posture regulation
Foot sole and ankle muscle inputs contribute jointly to human erect posture regulation
复制标题
DOI：
10.1111/j.1469-7793.2001.0869e.x
复制
发表时间：
2001-05-01
影响因子：
5.5
通讯作者：
Roll, JP
中科院分区：
文献类型：
--
作者：
Kavounoudias, A;Roll, R;Roll, JP
1.为了评估足底皮肤和肌肉本体感受反馈在控制人体直立姿势中的相对贡献和相互作用，使用不同的振动频率模式（范围从20到80 Hz）将单个或组合振动刺激施加到9名站立受试者的前足区域和胫骨前肌肌腱.记录并分析受试者足底压力中心、踝关节角度的变化以及比目鱼肌和胫骨前肌的肌电活动.足底前足区或胫骨前肌的单独刺激总是导致全身倾斜相反方向的向后和向前，分别，其振幅是成比例的振动频率。踝部肌肉的肌电图活动也根据姿势反应的方向而变化。然而，相同的振动频率并没有引起等效的姿势反应：在低频率范围内，触觉刺激比本体感受刺激引起更强的姿势效应，而在较高频率范围内则匡威.在感觉冲突条件下，即足底-踝屈肌共同刺激，身体倾斜的方向也根据振动频率的差异和绝对水平而变化。在所有的情况下，所产生的姿势变化总是对应于在振动这两个感觉通道中的每一个时观察到的孤立效应的理论总和。我们建议，触觉和本体感受信息的足底和踝关节屈肌可能会共同处理后的向量添加模式，以辅助维持直立站姿的互补方式。
1. In order to assess the relative contribution and the interactions of the plantar cutaneous and muscle proprioceptive feedback in controlling human erect posture, single or combined vibratory stimuli were applied to the forefoot areas and to the tendons of the tibialis anterior muscles of nine standing subjects using various vibration frequency patterns (ranging from 20 to 80 Hz).2. The variations in the centre of foot pressure, ankle angle and the EMG activities of the soleus and tibialis anterior muscles of each subject were recorded and analysed.3. Separate stimulation of the plantar forefoot zones or the tibialis anterior muscles always resulted in whole-body tilts oppositely directed backwards and forwards, respectively, the amplitude of which was proportional to the vibration frequency. EMG activity of ankle muscles also varied according to the direction of the postural responses. However, the same vibration frequency did not elicit equivalent postural responses: in the low frequency range, tactile stimulation induced stronger postural effects than proprioceptive stimulation, and the converse was the case for the higher frequency range.4. Under sensory conflict conditions, i.e. foot sole-flexor ankle muscle co-stimulation, the direction of the body tilts also varied according to the difference and the absolute levels of the vibration frequencies. In all cases, the resulting postural shifts always corresponded to the theoretical sum of the isolated effects observed upon vibrating each of these two sensory channels.5. We proposed that tactile and proprioceptive information from the foot soles and flexor ankle muscles might be co-processed following a vector addition mode to subserve the maintenance of erect stance in a complimentary way.