• 대한통합의학회지
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• 제1권4호
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• pp.85-92
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• 2013

PURPOSE : The purpose of this study was to determine the effects of the length of the pectoralis minor on muscle activity of trapezius and pectoralis major in subjects in subjects with shortened pectoralis minor muscle. METHOD : The subjects was participated in 36 with shortened pectoralis minor muscle. All subjects was examined the length test of pectoralis minor muscle. we divided by 3 groups. group I(n=12) was for 4~5cm of length of pectoralis minor muscle, group II(n=12) was for 5~6cm, group III(n=12) was for above 6cm. The EMG activity of upper trapezius, middle trapezius, lower trapezius and pectoralis major muscle activity was measured by surface EMG while elevationg the right arm in sitting postion with head to the neutral, shoulder elevation $135^{\circ}$ with scaption. Data were analyed using one-way ANOVA with a Tukey post hoc test. RESULT : The EMG activity differed significantly among the three groups(p<.05). The group III had significantly greater EMG activity of upper trapezius and pectoralis major muscles than group I and II(p<.05). Also, The group III had significantly smaller EMG activity of lower trapezius muscle than group I and II(p<.05). But, these was no significant difference in the EMG activity of the middle trapezius muscle among the groups (p.05). CONCLUSION : Therefore, the result of this study should be suggested that the shortened pectoralis minor muscle was affected the EMG activity of the upper trapezius, lower trapezius and pectoralis major. Ultimately the length of the pectoralis minor muscle leads to the muscle imbalance in shoulder girdle.

• 대한통합의학회지
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• 제5권3호
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• pp.21-28
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• 2017

Purpose: The purpose of this study was to investigate the effects of three exercise programs on forward head posture. Methods: Ninety-five individuals were recruited to assess the of the pectoralis minor muscle. Of these, 36 individuals with pectoralis minor muscles were selected and randomly divided into three groups: a functional massage group, a stretching group, and a stretching and muscle strengthening group. The exercise program consisted of sessions four times per week for two weeks. The length of pectoralis minor and the activity of the trapezius muscles were measured using electromyography. Forward head posture was assessed using the craniovertebral angle (CVA) and the cranial rotation angle (CRA) pre-, during and post-treatment. Result: Significant improvements were observed in pectoralis minor length, CRA, and CVA post-treatment in all groups (p<0.05, p<0.01, p<0.001). However, only the activity of the lower trapezius demonstrated a statistically significant difference post-treatment. There were no significant differences between the groups. Conclusion: The findings of this study suggest that all three exercise programs were effective in improving forward head posture and the length of pectoralis minor post-treatment.

• PNF and Movement
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• 제21권2호
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• pp.159-169
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• 2023

Purpose: The study examined the effect of dynamic taping and Kinesio Taping intervention on round shoulder posture, pectoralis minor length, craniovertebral angle, and balance in 20s adults with rounded shoulder posture. Methods: A total of 20s Adults with rounded shoulder posture were recruited and randomized to Group I (n = 15) and Group II (n = 15). Group I performed dynamic taping. Group II performed Kinesio Taping. Round shoulder posture and pectoralis minor length were measured using a tape measure. The craniovertebral angle was measured using a goniometer. Balance was measured using Biorescue. Results: As a result of comparison within groups, groups I and II showed a significant difference for round shoulder posture, pectoralis minor length, craniovertebral angle, and balance after the experiment (p < 0.05). In a comparison between the two groups, the experimental group showed a more significant difference in round shoulder posture, pectoralis minor length, craniovertebral angle, and balance than the control group (p < 0.05). Conclusion: This study showed that dynamic taping intervention was effective in round shoulder posture, pectoralis minor length, craniovertebral angle, and balance in 20s adults with rounded shoulder posture.

• 한국전문물리치료학회지
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• 제24권2호
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• pp.48-57
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• 2017

Background: Rounded shoulder posture (RSP), a postural abnormality, might cause shoulder pain and pathologic conditions. Although most previous research has investigated RSP focusing on the proximal structures of the shoulder, such as the scapula and pectoralis muscles, the relationship between RSP and anterior distal structures of the upper extremity, such as the biceps brachii muscle and elbow joint, is not clearly understood. Objects: This study aimed to investigate the correlations between RSP and the biceps brachii length, elbow joint angle (EJA), pectoralis minor length, general pectoralis major length, humeral head anterior translation (HHAT), glenohumeral internal rotation (IR), external rotation (ER), and horizontal adduction (HAD). Methods: Twelve subjects with RSP (6 male, 6 female) were recruited. All subjects fulfilled the RSP criteria indicated by a distance ${\geq}2.5cm$ from the posterior aspect of the acromion to the table in the supine position. The examiner measured each of the following parameters twice: RSP, biceps brachii length, EJA, pectoralis minor length, pectoralis major length, HHAT, glenohumeral IR, ER, and HAD. Pearson's correlation coefficient(r) was used to assess the correlation between RSP and all the variables. Results: There was a significant moderate positive correlation between RSP and biceps brachii length (r=.55, p=.032), moderate negative correlation between RSP and pectoralis minor length (r=-.62, p=.015), and moderate positive correlation between RSP and HHAT (r=.53, p=.038). Conclusion: The biceps brachii length, pectoralis minor length, and HHAT could be used to evaluate patients with RSP. Better understanding of the correlation between these factors and RSP could help in the development of effective methods to treat patients with this condition in clinical management.

• 한국전문물리치료학회지
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• 제19권2호
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• pp.12-19
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• 2012

The purpose of this study was to assess the influence of scapular alignment on the electromyographic (EMG) activity of the trapezius in people with a short pectoralis minor muscle. For the study, we recruited 15 volunteers who had positive results for short on a pectoralis minor muscle length test. We measured the EMG activity of the upper, middle and lower trapezius muscles. The participants lifted their dominant arm to ear level with the thumb up toward the ceiling in the prone position on a table with the shoulder at a flexion angle of 180 degrees and a horizontal abduction angle of 120 degrees. Scapula was manually aligned by an experienced physical therapist prior to arm lift for the scapular alignment condition. A paired t-test was used to compare the effects of scapular alignment on the EMG activity of the trapezius muscles. The EMG activity of the lower trapezius muscle was significantly increased during the test with the scapular alignment compared to that without scapular alignment (p<.05), while the upper trapezius and middle trapezius exhibited no significant difference between the two conditions (p>.05). The findings of this study suggest that a scapular alignment may alter the recruitment of the lower trapezius muscle during arm lifting in the prone position in people with a short pectoralis minor muscle.

• 한국산학기술학회논문지
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• 제20권7호
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• pp.380-386
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• 2019

어깨관절 통증은 성인의 약 20% 정도가 일생에 한 번 이상 경험하는 매우 흔한 근골격계 질환이다. 이에 본 연구에서는 작은가슴근 신장운동에 의해 어깨뼈봉우리 밑 공간이 증가하여 충돌증후군 및 어깨통증에 긍정적인 효과가 있다는 객관적 평가를 실시하고, 작은가슴근 자가 신장운동이 도수 신장운동과 비교하여 작은가슴근의 길이와 봉우리 위팔 거리에 미치는 영향을 알아보고자 실시하였다. 경상북도 소재의 대학교에서 성인 남녀 30명을 대상으로 하여 대상자가 스스로 작은가슴근 자가 신장운동을 실시하는 실험군 15명과 치료사에 의해 수행되는 작은가슴근 도수 신장운동을 적용한 대조군 15명으로 두 그룹을 무작위 배치하여 치료의 즉각적인 효과를 비교하였다. 어깨뼈봉우리 위팔 거리를 측정하기 위해 초음파 장비를 사용하였고, 작은가슴근 길이를 측정하기 위해 4번째 늑골과 복장뼈가 만나는 부위 그리고 오훼돌기 아래측면 사이의 거리를 재었다. 연구결과 실험군과 대조군 모두 그룹 내에서 작은가슴근의 길이와 봉우리 위팔 거리 모두 유의하게 증가되었고(p<.05), 그룹 간 비교에서는 통계학적으로 유의한 차이가 나타나지 않았다(p>.05). 이러한 결과는 작은가슴근의 자가 신장운동이 충돌증후군 및 어깨질환의 예방 및 치료에 효율적인 운동방법으로 제시될 수 있다고 사료된다.

• 한국엔터테인먼트산업학회논문지
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• 제13권5호
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• pp.239-246
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• 2019

본 연구는 여대생의 라이프 케어 증진을 위한 둥근 어깨 자세의 작은가슴근, 어깨 가동성, 목 관절 가동 범위 의 상관관계를 알아보았다. 둥근 어깨 자세를 가진 성인 여성 80명을 대상자로 선정하였다. 대상자가 누운 자세에서 어깨의 높이를 측정하여 둥근 어깨 자세를 측정하였고, 작은가슴근의 길이, 어깨 가동성, 목 관절가동범위를 측정하여 상관분석을 한 결과는 다음과 같다. 오른쪽 둥근 어깨와 목 폄의 상관계수는 -.23(p<0.05)이었다. 오른쪽 작은가슴근 지수와 목 왼쪽 가쪽 굽힘의 상관계수는 -.25(p<0.05)이었고, 오른쪽 작은가슴근 지수와 목 굽힘 상관계수는 -.25(p<0.5)이었다. 왼쪽 어깨 가동성과 목 왼쪽 가쪽 굽힘의 상관계수는 -.23(p<0.05)이었고, 왼쪽 어깨 가동성과 목 오른쪽 돌림의 상관계수는 -.23(p<0.5)이었으며, 왼쪽 어깨 가동성과 목 왼쪽 돌림의 상관계수는 -.25(p<0.05)로 통계학적으로 유의한 음의 상관관계가 있었다(p<0.05). 이상의 결과로 오른쪽의 둥근 어깨가 심할수록 목폄이 감소하였고, 오른쪽 작은가슴근이 단축될수록 목 왼쪽 가쪽 굽힘과 목 굽힘이 감소하였으며, 왼쪽 어깨 가동성이 증가할수록 목 왼쪽 가쪽 굽힘은 감소하였고, 오른쪽 돌림과 왼쪽 돌림이 감소하였음을 알 수 있었다.

• 대한정형도수물리치료학회지
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• 제27권2호
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• pp.17-25
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• 2021

Background: The purpose of this study is to investigate basic data about the effects of muscle energy technique on the shoulder complex range of motion and posture alignment in the round shoulder posture. Methods: The subjects included 15 women that gave consent to participate in the study voluntarily. They performed the muscle energy technique for 30 minutes twice. The round shoulder posture was measured with a straight edge ruler. The shoulder complex range of motion was measured with the apley scratch test. The forward head posture was measured with ImageJ. The pectoralis minor muscle length was measured with a tape measure. Results: There were statistically significant differences in the round shoulder posture both right and left (p<.05). The experiment group showed statistically significant differences in the pectoralis minor muscle length (p<.05). There were significant differences in the shoulder complex range of motion including flexion, left lateral flexion, right lateral flexion, left side bending, and right side bending (p<.05), but no significant differences were found in extension (p>.05). The forward head posture showed significant differences in CVA changes (p<.05) and no significant differences in CRA changes (p>.05). Conclusion: These findings demonstrate that the muscle energy technique relaxed muscles around the shoulders and increased the shoulder complex range of motion. The technique is also expected to prevent pain in the neck and shoulders and lower injury risk. In conclusion, the muscle energy technique can be applied as an effective intervention for round shoulder posture.

• 대한물리의학회지
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• 제16권2호
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• pp.45-52
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• 2021

PURPOSE: This study examined the imaging procedure of pectoralis minor muscle thickness and assessed the intra- and inter-rater reliability of the muscle thickness measured by two raters using rehabilitative ultrasound imaging (RUSI) in healthy individuals. METHODS: Fifteen participants (aged 21 - 28, seven females, and eight males) were involved in the study. The primary rater palpated the coracoid process and the fourth rib, defined as the width of the index finger lateral to the sternum to avoid breast tissues, and lined the two landmarks. The second examiner checked 1 / 3 (1st point) and 1 / 2 (2nd point) of the line length as measurement points. The two raters obtained right side muscle images of the participants at a standardized sitting position using RUSI with a 7.5 MHz linear transducer at 40mm depth. For intra-rater reliability, the principal rater took three images per point and tried to take one more with an interval. For the inter-rater reliability, the other rater performed the same tasks as the principal rater on the same day. The reliability was analyzed using the intra-class correlation coefficient (ICC), the standard error of the measurement (SEM), and Bland and Altman plots. RESULTS: The reliability at all points was excellent for the same rater (ICC_3,1 = .973 - .978, SEM = .042 - .046), and between raters (ICC_2,1 = .939 - .959, SEM = .059 - .097). CONCLUSION: These findings show that the RUSI could be reliable for examining the pectoralis minor muscle thickness in healthy individuals at all measurement sites.

• 대한물리치료과학회지
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• 제29권4호
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• pp.1-16
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• 2022

Background: This study was conducted to examine the correlation of VDT, posture and shoulder function among each group divided by according to the neck pain disorder index (NDI) scores for female patients with neck pain. Design: Cross-sectional study. Methods: Fifty adult women with neck pain voluntarily participated in this study and the neck pain disorder index questionnaire, VDT syndrome assessment tool questionnaire, craniovertebral angle, thoracic kyphosis angle, round shoulder posture, pectoralis minor length, shoulder joint hypermobility, and serratus anterior strength tests were conducted respectively. Subjects were divided into two groups where 21 subjects were allocated to the mild pain group whom have rated below 14 points on the NDI scores, and 29 subjects were in the severe pain group, whom have rated above 15 on the NDI score. Results: The study found that in the mean difference between variables in each group, VDT syndrome showed a higher mean score in the severe pain group than the mild pain group (p<0.05). In the group correlation and regression analysis, the mild pain group showed a significant negative correlation between the craniovertebral angle and round shoulder posture (r=-0.467, p<0.05), and the round shoulder posture for craniovertebral angle was shown to have significant positive influence (B=10.162, p<0.05). The severe pain group showed that the NDI and the VDT syndrome had a significant amount of correlation (r=0.520, p<0.01), the VDT syndrome showed significant positive influence (B=0.330, p<0.05), and the craniovertebral angle showed significant negative influence (B=-0.809, p<0.05). It was also shown that shoulder joint hypermobility had a significant negative correlation with the serratus anterior strength (r=-0.437, p<0.01), and that serratus anterior strength had a significant negative influence on shoulder joint hypermobility (B=-4.175, p<0.05). Conclusion: This study is of clinical significance in that it presented variables that should be considered depending on the degree of neck pain in treating patients with neck pain and that it presented patients with not only posture but also the function of the shoulder joint as factors to consider.