Sympathetic outflow enhances the stretch reflex response in the relaxed soleus muscle in humans.

@article{Hjortskov2005SympatheticOE,
  title={Sympathetic outflow enhances the stretch reflex response in the relaxed soleus muscle in humans.},
  author={Nis Hjortskov and J\orgen Henrik Skotte and Christian CHK Hye-Knudsen and Nils Fallentin},
  journal={Journal of applied physiology},
  year={2005},
  volume={98 4},
  pages={1366-70}
}
Animal experiments suggest that an increase in sympathetic outflow can depress muscle spindle sensitivity and thus modulate the stretch reflex response. The results are, however, controversial, and human studies have failed to demonstrate a direct influence of the sympathetic nervous system on the sensitivity of muscle spindles. We studied the effect of increased sympathetic outflow on the short-latency stretch reflex in the soleus muscle evoked by tapping the Achilles tendon. Nine subjects… CONTINUE READING