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Comparison of Muscle Activity Ratio of Upper Trapezius to Serratus Anterior During Shoulder Elevation Between Subjects With and Without Pain Experienced in Upper Trapezius

한국전문물리치료학회지 2014년 21권 2호 p.67 ~ 73
안선희, 안선희, 권오윤, Chung Sung-dae, 김시현, 전인철, 권오윤, Chung Sung-dae, 김시현, 전인철,
소속 상세정보
안선희 ( Ahn Sun-Hee ) - Yonsei University Graduate School Department of Physical Therapy
권오윤 ( Kwon Oh-Yun ) - Yonsei University College of Health Science Department of Physical Therapy
 ( Chung Sung-dae ) - Yonsei University Graduate School Department of Physical Therapy
김시현 ( Kim Si-hyun ) - Yonsei University Graduate School Department of Physical Therapy
전인철 ( Jeon In-Cheol ) - Yonsei University Graduate School Department of Physical Therapy
권오윤 ( Kwon Oh-Yun ) - Yonsei University College of Health Science Department of Physical Therapy
 ( Chung Sung-dae ) - Yonsei University Graduate School Department of Physical Therapy
김시현 ( Kim Si-hyun ) - Yonsei University Graduate School Department of Physical Therapy
전인철 ( Jeon In-Chul ) - Yonsei University Graduate School Department of Physical Therapy

Abstract


The aim of this study was to compare the activity of the upper trapezius (UT) and serratus anterior (SA) and ratio of UT to SA during shoulder elevations. Ten subjects with UT pain (UTP) and 13 subjects without UTP participated in this study. Subjects with a UTP of over five in a pain intensity visual analogue scale (0-10 ㎝) for more than 2 months and latent myofascial trigger points (MTrPs) in the UT muscle were included in the UTP group. Electromyography (EMG) data of UT and SA at 1st and 10th elevations were analyzed. Two-way repeated analyses of variance were used to compare the EMG activity of UT and SA and the ratio of UT to SA during shoulder elevations between groups with and without UTP. There was a significant increase in UT/SA ratio in the group with UTP compared to the group without UTP (p=.01). The activity of UT and SA measured at the 10th elevation was significantly greater than that in the first elevation (p<.05). The activity of SA was significantly greater in the group without UTP than the group with UTP (p=.03). However, there was no significant difference between groups with and without UTP in terms of UT activity (p=.28). These results indicate that UTP may have relevance to the increased muscle activity ratio of UT to SA during shoulder elevations.

키워드

Electromyography; Ratio of muscle activity; Serratus anterior; Upper trapezius pain

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