Stimulation of Gluteal Muscles with Electro-Magnetic Stimulation: an Ultrasonographic Study.
- Author:
Han Gil SEO
1
;
Hyung Ik SHIN
;
Joon Woo LEE
;
Sang Yoon LEE
Author Information
1. Department of Rehabilitation Medicine, Seoul National University College of Medicine, Korea. hyungik1@snu.ac.kr
- Publication Type:Original Article
- Keywords:
Magnetic stimulation;
Neuromuscular electrical stimulation;
Pain;
Gluteal muscles;
Ultrasonographic study
- MeSH:
Buttocks;
Contracts;
Electric Stimulation;
Humans;
Male;
Muscle Contraction;
Muscles
- From:Journal of the Korean Academy of Rehabilitation Medicine
2008;32(4):417-423
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVE: To know if electro-magnetic stimulation can induce the contraction of gluteus medius and minimus muscles, and to compare pain induced by electro-magnetic stimulation of the gluteal muscles with that induced by transcutaneous neuromuscular electrical stimulation (NMES). METHOD: Two different intensity of transcutaneous NMES (40 mA, 60 mA) and electro-magnetic stimulation (60%, 100%) were applied to the left buttock of 15 healthy male volunteers in random order. The ultrasound images of gluteal muscles and visual analog scale (VAS) of pain were obtained three times at each type of stimulation. The grade of muscle contraction and the VAS score of each type of stimulation were compared. RESULTS: At maximal stimulation intensity of our equipments, the mean VAS score was lower (p=0.012) in electro-magnetic stimulation than in transcutaneous NMES, and the grade of gluteus minimus contraction was higher (p=0.035) in electro-magnetic stimulation than in transcutaneous NMES. When the mean VAS scores at the same grade of contraction were compared, the VAS scores of electro-magnetic were lower than transcutaneous NMES in both gluteus medius (3.92+/-1.79 vs. 5.35+/-2.98, p=0.033) and minimus (4.12+/-1.85 vs. 5.69+/-3.00, p=0.046). CONCLUSION: Electro-magnetic stimulation induced the contraction of gluteus medius and minimus muscles with less pain than electrical stimulation for the same amount of muscle contraction. These results suggest that electro-magnetic stimulation can replace transcutaneous NMES in deep, large muscles such as gluteal muscles.
