Stretch reflex contribution to soleus activation during spastic gait

Author

Veltink, Peter H. ; Ladouceur, Michel ; Sinkjaer, Thomas

Author_Institution

Center for Sensory-Motor Interaction, Aalborg Univ., Denmark

Volume

5

fYear

1998

fDate

28 Oct-1 Nov 1998

Firstpage

2328

Abstract

The authors studied the ankle extensor stretch reflex contribution to locomotor EMG for spastic gait by relating ankle angular velocity and soleus electromyography (EMG). The perturbations induced by the load variation during free gait were sufficient to characterize the stretch reflex contribution to soleus EMG during the beginning of the stance phase. Dorsiflexion peaks in the averaged ankle angular velocity were accompanied by peaks in the averaged rectified soleus EMG at a delay of approximately 50 ms. The coherence and transfer functions relating the raw angular velocity and EMG signals also indicated this stretch reflex contribution

Keywords

electromyography; gait analysis; 50 ms; EMG signal; averaged rectified soleus EMG; coherence; dorsiflexion peaks; free gait; load variation; locomotor EMG; raw angular velocity signal; soleus activation; spastic gait; stance phase; stretch reflex contribution; transfer functions; Angular velocity; Electrodes; Electromyography; Goniometers; Joints; Legged locomotion; Muscles; Phase modulation; Spinal cord; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE

Conference_Location

Hong Kong

ISSN

1094-687X

Print_ISBN

0-7803-5164-9

Type

conf

DOI

10.1109/IEMBS.1998.744758

Filename

744758