• 대한물리의학회지
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• 제15권3호
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• pp.29-41
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• 2020

PURPOSE: The aim of this study was to provide evidence for the treatment of Forward Head and Rounded Shoulder Posture (FHRSP) using posture correction exercises by comparing muscle activity and onset time around the neck and shoulder area during an arm elevation task. METHODS: The subjects were divided into FHRSP (21 persons) and non-FHRSP (19 persons) groups to measure muscle activity and onset time of muscle contraction. Wireless surface electromyography was used to assess the muscle activity and onset time of the right and left sternocleidomastoid (SCM), splenius capitis, anterior deltoid, middle deltoid, serratus anterior, upper trapezius, pectoralis major, and infraspinatus during an arm elevation task. After the pre-measurement, the participants performed the postural correction exercises, and then the post-measurement was conducted. RESULTS: After the posture correction exercises, there were significant differences in the muscle activity and onset time of all muscles in the FHRSP group. The results of the comparison of the muscle onset time during an arm elevation task demonstrated that after the postural correction exercises, the muscle onset time was significantly reduced in the right and left SCM and left splenius capitis, but there were no significant changes in the onset time of other muscles. CONCLUSION: The results of this study help us understand the change in muscle activities and muscle contraction onset time in a person with FHRSP when lifting the arm and suggest the relevant basis to apply the posture correction exercise in clinical settings.

• 원예과학기술지
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• 제34권6호
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• pp.940-958
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• 2016

The objective of this study was to analyze the kinematic and kinetic characteristics of two horticultural activities: seed sowing and planting plant. Thirty-one male university students (aged $26.2{\pm}2.0years$) participated in this study. Kinematic factors (movement times, peak velocity, joint angles, and grasp patterns) were assessed using a three-dimensional motion analysis system while the subjects performed the horticultural activities. Kinetic factors (muscle activation of eight upper-limb muscles: the anterior deltoid, serratus anterior, upper trapezius, infraspinatus, latissimus dorsi, biceps brachii, brachioradialis, and flexor carpi radialis) were assessed using surface electromyography. The acts of seed sowing and planting plant were comprised of five tasks which included six types of phases: reaching, grasping, back transporting, forward transporting, watering, and releasing. The movement times, peak velocity, joint angles, and grasp patterns were significantly different across the tasks involved in the horticultural activities. All eight muscles of the upper limbs were utilized during the horticultural activities, and the muscle activation of the serratus anterior was the highest compared to that of the other muscles tested. The kinematic and kinetic characteristics of these horticultural activities showed similar characteristics to reaching and grasping rehabilitation training and daily living activities. The present study provides reference data for common horticultural activities using a kinematic and kinetic analysis.

• Clinics in Shoulder and Elbow
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• 제19권3호
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• pp.130-136
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• 2016

Background: A novel technique for the repair of tears of the upper subscapularis tendon-intraarticular knotless fixation-has been introduced recently. The purpose of this study was to evaluate the clinical and structural outcomes of arthroscopic intraarticular knotless fixation for the treatment of upper subscapularis tendon tears. Methods: We retrospectively analyzed the clinical and radiological outcomes of 27 patients who underwent arthroscopic intraarticular knotless fixation for upper subscapularis tendon tears. Finally, a total of 10 patients who could participate in at least a 6 month follow-up of magnetic resonance imaging evaluation and in a least 1-year follow-up on an outpatient basis were enrolled in our study. The mean age at the time of operation was 60.7 years, and the mean duration of follow-up was 14.7 months. Two patients had concomitant tears of the supraspinatus tendon and 8 patients had concomitant tears of the supraspinatus and the infraspinatus tendons. Results: The clinical and radiological outcomes improved after the patients had undertaken arthroscopic intraarticular knotless fixation. The mean visual analogue scale score for pain during motion improved from 6.7 preoperatively to 1.4 at the final follow-up (p<0.001). The mean Constant score improved from 59.3 preoperatively to 79.6 at the final follow-up, and the mean the University of California at Los Angeles score, from 21.7 to 30.2, respectively (p<0.001 and p<0.001). The upper subscapularis tendon tear was healed in every patient except one (90%), for the patient had suffered from a postoperative trauma that resulted in a retear. Conclusions: We found that arthroscopic intraarticular knotless fixation gives good clinical and structural outcomes for the repair of upper subscapularis tendon tears. Arthroscopic intraarticular knotless fixation provided such a reliable and efficient restoration of the subscapularis tendon footprint that we anticipate it will become a widely-used procedure for upper subscapularis tendon tears.

• Clinics in Shoulder and Elbow
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• 제23권3호
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• pp.144-151
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• 2020

Background: This study was designed to evaluate characters of the rotator cuff tear (RCT) recognized after primary shoulder dislocation in patients older than 40. Methods: From 2008 to 2019, patients who visited two hospitals after dislocation were retrospectively reviewed. Inclusion criteria were patients over 40 who had dislocation, with magnetic resonance imaging (MRI) undergone. Exclusion criteria were patients who lost to follow-up, combined with any proximal humerus fracture, brachial plexus injury, and previous operation or dislocation history in the ipsilateral shoulder. Also patients who had only bankart or bony bakart lesion in MRI were excluded. We evaluated RCTs that were recognized by MRI after the primary shoulder dislocation with regard to tear size, degree, involved tendons, fatty degeneration, the age when the first dislocation occurred, and the duration until the MRI was evaluated after the dislocation. Results: Fifty-five RCTs were included. According to age groups, the tear size was increased in coronal and sagittal direction, the number of involved tendons was increased, and the degree of fatty degeneration was advanced in infraspinatus muscle. Thirty-two cases (58.2%) conducted MRI after 3 weeks from the first shoulder dislocation event. This group showed that the retraction size of the coronal plane was increased significantly and the fatty accumulation of the supraspinatus muscle had progressed significantly. Conclusions: Age is also a strong factor to affect the feature of RCT after the shoulder dislocation in patients over 40. And the delay of the MRI may deteriorate the degree of tear size and fatty degeneration.

• 대한한의학회지
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• 제20권3호
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• pp.115-126
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• 1999

OBJECTIVES: In order to study the effect of scapular girdle taping on hemiplegic shoulder pain, a clinical study was performed. . METHODS: Forty patients with hemiplegic shoulder pain were randomized into two groups. Twenty patients underwent a standard acupuncture treatment for shoulder pain (named control group). The other twenty patients underwent the same acupuncture treatment, but scapular girdle taping was added after acpuncture treatment (named sample group). Tapes were applied to the supraspinatus, infraspinatus, deltoid and pectoris major muscles. Shoulder pain was measured with a visual analog scale. The acupuncture treatment was performed daily for 3 weeks, and the scapular girdle taping was performed for 3 weeks in the frequency of 2 times a week. RESULTS: In terms of improvement of pain, the sample group showed statistically meaningful decrease after 3 times treatment compared with control group (P<0.05). In terms of improvement of pain with shoulder subluxation, the sample group showed a statistically meaningful decrease after 3 treatments compared with the control group (P<0.05). CONCLUSIONS: These results support that scapular girdle taping is significantly effective in reducing hemiplegic shoulder pain.

• 대한정형외과 초음파학회지
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• 제1권2호
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• pp.112-116
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• 2008

최근 견관절 질환에 대한 이해가 높아짐에 따라서 견관절에서 초음파의 유용성 또한 급격히 증가하는 추세이다. 초음파 검사는 비 침습적이며 검사 비용이 저렴할 뿐만 아니라 견관절에서는 유일하게 회전근 개의 움직임을 실시간으로 관찰할 수 있다는 큰 장점이 있다. 견관절 초음파 검사는 일반적으로 환자가 앉은 자세에서 실시하며, 검사 순서는 전방에서부터 시작하여 후방 관절 구조물들을 확인하면서 검사를 마친다. 초음파 검사는 견관절 주위의 여러 근육과 인대, 관절와 순, 골 구조 등을 확인할 수 있으며, 특히 회전근 개 질환의 진단에 큰 도움을 준다. 회전근 개는 견갑하근, 극상근, 극하근, 그리고 소 원형근의 네 개의 근육으로 이루어진 하나의 운동 단위이며, 견관절의 능동 운동시 지렛점으로 작용하여 견관절 운동을 원활하게 조종하는 역동적 안정 요소의 기능을 담당한다.

• 혜화의학회지
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• 제14권1호
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• pp.67-81
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• 2005

We have conclusions after the study of muscular system about small intestine channel of hand taiyang muscle. Judging from many studies of interrelation between Meridian muscle and muscle, it is considered that Meridian muscle theory has some similarities with modern anatomical muscular system. It is considered that Small intestine channel of hand taiyang muscle contains Flexor digitorum profundus muscle, Extensor digiti minimi muscle, Abductor digiti minimi muscle, Extensor carpi ulnaris muscle, Flexor carpi ulnaris muscle, Triceps brachii muscle, Infraspinatus muscle, Levator scapulae muscle, Sternocleidomastoid muscle, Masseter muscle, Temporalis muscle. The symptoms of small intestine channel of hand taiyang muscle is similar to referred pain of modern Myofascial Pain Syndrome, and the medical treatment of "I Tong Wi Su(以痛爲輸)" is also similar to that of Myofascial Pain Syndrome. Small intestine channel of hand taiyang muscle is one of the three yang channels of hand muscle, and it has unity in extension of upper limb and trunk in the movement. And it is thought that weakness of small intestine channel of hand taiyang muscle is related with muscular system causing Round Shoulder and Head Forward Position.

• Journal of Acupuncture Research
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• 제18권5호
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• pp.1-10
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• 2001

Objective : This study was performed to confirm the effects of acupuncture on myofascial pain syndrome(MPS) through the change of visual analogue scale(VAS) and pain pressure threshold(PPT) and the usefulness of pressure algometer on the evaluation of pain. Methods : We perfomed this study with 20 outpatients complaining of upper back pain. Before acupuncture therapy(AT), immediately after AT and 2-3 days after AT, we respectively checked visual analogue scale(VAS) and pain pressure threshold(PPT) through pressure algometer, with patients seated and relaxed. The PPT was checked at major trigger point of upper trapezius, levator scapulae, supraspinatus, infraspinatus, rhomboideus minor. and the patients were needled at the same points and maintained for 15 minutes. Results : VAS of immediately after AT was mild higher than that of before AT, but not significantly different. and VAS of 2-3 days after AT was significantly lower than before AT and immediately after AT. PPT of immediately after AT was lower than before PT, but not significantly different. PPT of 2-3 days after AT was significantly higher than that of before AT and immediately after AT. Also PPT was significantly correlated with VAS. Conclusion : PPT of omen was signicantly lower than that of men. and there was no significant difference by age. PPT was increased according to pain duration. Effectiveness of acupuncture on myofascial pain syndrome through PPT and VAS is showed at 2-3 days after AT rather than immediatly after AT. and pressure algometer is useful for the evaluation of Acupuncture therapy on myofascial pain syndrome.

• 한국전문물리치료학회지
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• 제23권3호
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• pp.68-75
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• 2016

Background: Shoulder horizontal adduction (HA) is performed in many activities of daily living. The limited range of motion (LROM) of HA is affected by the tightness of the posterior deltoid, infraspinatus, teres major, and posterior capsule of glenohumeral joint. The LROM of shoulder HA contributes to excessive scapular abduction. Objects: The aim of this study is to compare the scapular abduction distance and three-dimensional displacement of the scapula during shoulder horizontal adduction between subjects with and without the LROM of shoulder HA. Methods: 24 subjects (12 people in LROM group and 12 people in normal ROM group) participated. Subjects with less than $115^{\circ}$ of HA ROM were included in LROM group. Shoulder HA was performed 3 times for measuring scapular abduction distance and three-dimensional displacement of the scapula. Tape measure was used for measuring scapular abduction distance. Scapular abduction distance was normalized by dividing the scapular size. Polhemus Liberty was used for measuring the three-dimensional displacement of the scapula. Results: Normalized scapular abduction distance was significantly greater in LROM group than normal ROM group (p<.001). Three-dimensional displacement of the scapula during shoulder HA was greater in LROM group than normal ROM group (p<.05). Conclusion: LROM group had a greater scapular abduction and three-dimensional displacement of the scapula during shoulder HA compared to normal ROM group.

• 대한인간공학회지
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• 제34권1호
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• pp.11-18
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• 2015

Objective: The aim of this study was to understand the effects of phone weight on the typing performance and muscle recruitment in the neck and upper extremity while typing a text message with dominant hand. The iPhone4 and iPhone5 were compared due to their 28-gram differences in weight. Background: Too much use of a cellular phone can lead the musculoskeletal disorders in the upper extremity. Phone makers tend to make their new models bigger, lighter, faster and smarter. Method: Fourteen healthy volunteers without any history of neuromuscular disorders or ongoing pain who used their smartphone more than one year were recruited. A 112g phone (iPhone5) and a 142g phone (iPhone4) were used for typing the lyric of the Korean national anthem with their dominant hand. Typing duration, the typing error, the perceived fatigue, and preference was investigated. Muscle recruitment and the resting gap of neck (middle trapezius and levator scapula), shoulder (infraspinatus and mid deltoid), elbow (biceps brachii and brachioradialis), thumb (extensor and abductor policis brevis) were collected using surface electromyography. Typing error was counted and typing speed was calculated in characters per min. The data were analyzed using a paired t-test and chi-square (${\chi}^2$) analysis for the effects of phone weight on the typing performance parameters and muscle recruitment. Results: Typing text message with iPhone5 took longer but had less muscle recruitment in brachioradialis, and extensor policis brevis muscles. Lighter weight of iPhone5 made biceps brachii to rest less without increasing the mean %EMG. Conclusion/Application: Findings of this study can be valuable information for phone designers to develop more productive device and for smartphone users to prevent the musculoskeletal disorders in the upper extremities.