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The effect of Visual Biofeedback on EMG Activity of Trunk Muscles and Endurance Holding Time for Correct Position During Whole-Body Tilt Exercise

Usefulness of Measurement of Paravertebral Muscle Function Using 3D-NEWTON®

Nami Han, M.D., Hyun Dong Kim, M.D.,
Dong Seok Lee, M.D., JoonMyoungYoo, M.D Department of Physical Medicine and Rehabilitation, Pusan Paik Hospital,
Inje University College of Medicine

ABSTRACT
Usefulness of Measurement of Paravertebral Muscle Function Using 3D-
NEWTON®
Objective: To evaluate the validity of measuring paravertebral muscle function with 3D- NEWTON® by assessment of correlation among Biodex and surface EMG.
Method: Nineteen healthy adults were participated. The function of their paravertebral muscle was measured by three ways. By 3D-NEWTON® the maximum enduration time was measured by second when 3D-NEWTON® was fowardly inclined for the extensor function, and backwardly inclined for the flexor function. By surface EMG maximum muscle activity was obtained from eractorspinae and rectus abdonimis during 3D-NEWTON®measurement. Maximum muscle activity was the mean activity of 10 seconds when the root mean sequared firing data was highest. By Biodex® peak torques of extensor and flexor were measured by isometric exercise. The correlation coefficiencies among data from 3D-NEWTON®, surface EMG and Biodex® were calculated using the Spearman correlation coefficiency. These data were analyzed statistically using SPSS v13.0.