Key result
Dynamic passive hip flexion lowers the soleus H-reflex versus stationary controls, while extension increases it.
Why the study?
Does dynamic imposed hip angle change modulate the soleus H-reflex compared to static conditions in healthy subjects?
Does dynamic imposed hip angle change modulate the soleus H-reflex compared to static conditions in healthy subjects?
The soleus H-reflex is modulated by hip proprioceptors during passive hip movement, suggesting a role for the central pattern generator.
Should not change practice in patients; leaves open extension to CPG mechanisms or neurological populations.
The aim of the study was to investigate the modulation of the soleus H-reflex during static and dynamic imposed hip angle changes. Five healthy subjects participated. H-reflexes were measured during hip joint passively flexed and extended in the sagittal plane. In flexion phase, the soleus H-reflex during dynamic conditions was lower than the stationary controls. By contrast, it was conversely higher in extension phase. The findings suggest that the modulation of the soleus H-reflex from hip proprioceptors is a major factor in passive hip movement. Additionally, the central pattern generator might modulate the soleus H-reflex.
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KAMIYA et al. (2006) studied Healthy (n=5). Dynamic imposed hip angle changes (passive flexion and extension) vs. Stationary controls (static hip angle) was evaluated on Soleus H-reflex modulation. Dynamic passive hip flexion lowered the soleus H-reflex compared to stationary controls, whereas dynamic extension increased it.
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