Afferent-mediated Locomotor Activity
نویسندگان
چکیده
The objective of the present study was to investigate the involvement of afferent feedback in the generation of plantar flexor muscle activity during human walking. Healthy subjects walked on a treadmill with the left leg attached to a portable stretching device. Changes in the soleus (SOL) background EMG were analyzed following slow, small amplitude, dorsiflexion perturbations applied to the ankle joint during the stance phase. The perturbations were applied with a small velocity increment compared with the ongoing ankle velocity (between 1 and 15 ̊/s). The results showed that the SOL muscle activity increased with the perturbation amplitude. It is argued that the observed change in the SOL background EMG could be due to the increased afferent feedback from muscle receptors in the stretched muscles.
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