• Anatomy and Cell Biology
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• 제56권1호
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• pp.145-149
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• 2023

Agenesis or congenital hypoplasia of skeletal muscles occurs infrequently but may occur with specific conditions such as Poland syndrome. The trapezius muscle can vary in the extent of its bony attachments or may have additional slips, however congenital absence or hypoplasia is extremely rare. There are only a few reports of partial or complete absence of the trapezius muscle. Two cases of bilateral absence of the trapezius were both in males and were accompanied by the absence of additional muscle in the pectoral girdle. Herein, we describe a case of a 56-year-old male cadaver with bilateral hypoplasia of the trapezius. The muscle was largely represented by atrophied muscle fibers with an abundance of fibrotic or fatty connective tissue. This subject had very minor hypoplasia of the left pectoralis major muscle, but the remaining muscles of the pectoral girdle were normal. The spinal accessory nerve terminated in the sternocleidomastoid muscle on both sides, failing to reach the trapezius. We interpret these findings to be consistent with a minor variant of Poland syndrome.

• 한국축산식품학회지
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• 제27권4호
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• pp.401-408
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• 2007

본 연구는 한국 재래 오골계의 성장에 따른 조직학적 및 생리학적 특성을 분석하기 위해 수행하였다. 계군들의 체중, 흉근과 가자미근의 무게 측정 및 시료의 채취는 부화 직후 및 3, 5, 15주령에 이루어졌다. 근섬유 특성은 부화 직후에서 15주령까지의 오골계 흉근과 가자미근을 이용하여 분석하였고, DNA, RNA 및 단백질 함량은 왼쪽 흉근에서 측정하였다. 체중의 상대적인 증가율은 부화 직후에서 3주령까지의 기간에 가장 크게 나타났다. 가슴의 무게는 부화 직후에서 3주령까지의 기간에 약 24.46배가 증가했으며, 가슴 중 흉근도 동일한 기간 동안 약 31.14배 증가하였다. 소퇴부 및 가자미근의 무게 역시 부화 직후에서 3주령까지의 시기에 뚜렷한 증가가 나타났다. 모든 근섬유의 단면적은 성장 기간 동안 증가하는데, 15주의 실험 기간 동안 흉근의 근섬유 단면적은 65배 증가($34.06\;{\pm}\;3.08$에서 $2238\;{\pm}\;177\;{\mu}m^2$)하였다. 흉근의 근섬유 단면적은 부화 직후에서 3주령까지의 기간에는 약 18배, 3주령에서 5주령까지의 기간 동안에는 약 1.6배 증가를 보였다. 따라서 흉근의 근섬유 단면적과 무게 역시 3주령 때까지 가장 큰 증가를 보임을 알 수 있다. 핵산 및 단백질의 함량을 분석한 실험에서도 부화 직후에서 3주령 사이에 가장 큰 증가가 나타났는데, 부화부터 3주령까지의 기간 동안 각각 DNA 총량은 13배, RNA 총량은 21배, 단백질 총량은 30배 증가한 것으로 나타났다.

• 한국응용과학기술학회지
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• 제35권3호
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• pp.940-947
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• 2018

본 연구의 목적은 플랫 벤치 프레스에서 하지를 지면에 지지한 자세와 하지를 벤치에 지지한 자세에서의 동작 수행 시 대흉근 및 척추기립근의 근 활성 분석을 통해 벤치 프레스 응용동작에 뒷받침 할 만 한 근거자료를 찾고, 운동수행에 관한 효율적인 기초자료를 제시하는데 있다. 대상자는 아마추어 보디빌더 4명, 헬스 트레이너 2명으로 선정하였다. 측정을 위해 연구대상들의 대흉근과 척추기립근에 표면전극을 부착하였다. 벤치 프레스에 대한 동작구간을 설정하고 하지를 지면에 지지한 동작과 하지를 벤치에 지지한 동작으로 나눠 피험자별 10RM으로 각각 1세트씩 실시하는 방식으로 진행하였다. 데이터는 SPSS 20.0을 통하여 분석하였으며 다음과 같은 결과를 얻었다. 플랫 벤치 프레스 동작 시 하지의 지지 유형이 대흉근에는 영향을 미치지 않았지만, 척추기립근에서는 차이가 나타났다.

• 대한정형도수물리치료학회지
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• 제22권1호
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• pp.51-58
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• 2016

Background: Evidence for effective management of scapular downward rotation syndrome is limited. The present study was performed to compare the scapular muscle activation through 4weeks wall slide exercise and sling slide exercise in subjects with scapular downward rotation syndrome. Methods: Twenty-two subjects with scapular downward rotation syndrome participated in the study. Surface electromyography data were collected from the upper and lower trapezius, serratus anterior and pectoralis major during shoulder flexion of $60^{\circ}$, $90^{\circ}$ and $120^{\circ}$ in the sagittal plane. The alignment of the scapula was measured using radiographic analysis. Subjects were assessed pre and post a 4 weeks exercise (wall slide, sling slide). The significance of the difference in pre- and post-exercise within each groups was assessed using a paired t-test. The significant difference between wall- and sling-exercise was used a independent t-test. Results: In the wall slide group, the muscle activity of upper trapezius decreased significantly during shoulder flexion at $60^{\circ}$, $90^{\circ}$ and $120^{\circ}$ after 4 weeks, and the muscle activity of serratus anterior increased significantly at all angles. Also, the muscle activity of pectoralis major decreased significantly at $90^{\circ}$ and $120^{\circ}$. Conclusions: Based on such results, it can be said that wall slide exercise is effective than sling slide exercise for the subjects with scapular downward rotation syndrome.

• 대한물리치료과학회지
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• 제29권3호
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• pp.48-55
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• 2022

Background: The purpose of this study is to examine the effect of push-up plus exercise on the changes in the thickness of the trapezius trapezius, serratus anterior and pectoralis major muscles involved in shoulder stability in various support surfaces. Design: Randomized controlled trial. Methods: The thickness change of the shoulder stabilizing muscle was measured using an ultrasound device. Corresponding t-test was performed to confirm the change within the group before the experiment and after 5 weeks. And one-way ANOVA was used to confirm the change between groups after 5 weeks. As a post hoc test, the least significant difference test was performed, and the significance level was set to a=0.05. Results: Changes in the thickness of the trapezius muscle within the group were significantly different between UPEG and SPEG after 5 weeks (p<0.05), and there was a significant difference between groups after 5 weeks (p<0.05). Changes in the thickness of the serratus anterior and pectoralis major muscle within the group were significantly different after 5 weeks in PEG, UPEG and SPEG (p<0.05), and the changes between the groups were significantly different in the serratus anterior muscle after 5 weeks (p<0.05). Conclusion: From the results of this study, it was found that the push-up exercise on an unstable support surface was effective for strengthening the trapezius upper and serratus anterior. This study intends to suggest the possibility of application as basic data for a push-up plus exercise program in clinical practice.

• Archives of Plastic Surgery
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• 제38권3호
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• pp.228-234
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• 2011

Purpose: Reconstruction of chest wall has always been a challenging problem. Muscle flaps for chest wall reconstruction have been helpful in controling infection, filling dead space and covering the prosthetic material in this challenge. However, when we use muscle flaps, functional and cosmetic donor site morbidities could occur. The authors applied and revised various partial muscle flaps and combination use of them to cover the prosthetic material for the chest wall reconstruction and evaluated the usefulness of partial muscle flaps. Methods: This study included 7 patients who underwent chest wall reconstruction using partial muscle flap to cover prosthetic material from 2004 to 2008. The pectoralis major muscle was used in anterior 2/3 parts of it leaving lateral 1/3 parts of it. The anterior 2/3 parts of the pectoralis major muscle were used while lateral 1/3 parts were left. In case of the rectus abdominis muscle flap, we used upper half of it, or we dissected it around its origin and then advanced to cover the site. The latissimus dorsi muscle flap was elevated with lateral portion of it along the descending branch of the thoracodorsal artery. If single partial muscle flap could not cover whole prosthetic material, it would be covered with combination of various partial muscle flaps adjacent to the coverage site. Results: Flap coverage of the prosthetic material and chest wall reconstructions were successfully done. There occurred no immediate and delayed post operative complications such as surgical site infection, seroma, deformity of donor site and functional impairment. Conclusion: When we use the muscle flaps to cover prosthetic material for chest wall reconstruction, use of the partial muscle flaps could be a good way to reduce donor site morbidity. Combination of multiple partial flaps could be a valuable and good alternative way to overcome the disadvantages of partial muscle flaps such as limitation of volume and size as well as flap mobility.

• 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.

• 대한두경부종양학회지
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• 제11권1호
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• pp.47-55
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• 1995

A large lateral facial defects especially a through and through defect of the cheek remains as challenging field of reconstruction for the head and neck surgeons. Closure of these wounds is technically troublesome due to the magnitude and location of the soft tissue and skin defect, functional and aesthetic consideration. optimal cancer surveillance, and desire for good nourishment. Most traditional methods dealing with these defects, including split-thickness skin graft, local and regional flaps as well as musculocutaneous flaps have their limitations. We applied four different methods for these reconstruction in four cases. We utilized temporal muscle flap, forearm free flap and secondary healing for repair of mucosal defects, and medial base cervicopectoral flap, pectoralis major myocutaneous flap and cervicofacial flap for the reconstruction of external skin defects. In one case, both sides were reconstructed with single forearm free flap. In our experiences, secondary healing could be one of the useful method for mucosal repair in the defect between upper and lower gingivobuccal sulcus. However, forearm free flap was thought to be more ideal for the cases with mandibulectomy. For the external repair, the regional skin flap was considered to be superior to pectoralis major myocutaneous flap or forearm free flap especially on color matching.

• The Journal of Korean Physical Therapy
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• 제22권5호
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• pp.1-8
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• 2010

Purpose: This study aimed to provide a scientific basis for effects of the push-up plus exercise program on scapular position and on muscle activity in individuals with rounded shoulder posture (RSP). Methods: The supine method was applied to 46 potential subjects, of which 30 with RSP were selected. Subjects with RSP were divided into two groups: a gender push-up plus group as the experimental group a pectoralis minor self.stretch group as the control group. RSP data after 4 weeks of each intervention were obtained and analyzed to measure the activities of the 3 muscles. Results: The two groups differed significantly with regard to EMG changes in the serratus anterior (p<0.05). The EMG results indicated a significant reduction in the activity of the upper trapezius in the experimental group (p<0.05). EMG results indicated a significant increase in the activity of the serratus anterior after the intervention (p<0.05). EMG results of the subjects in the control group indicated that the activity of the upper trapezius significantly decreased (p<0.05). The RSP values of the subjects in both groups were significantly decreased (p<0.00). Conclusion: An improvement in the strength of the serratus anterior, and in the stretch effectiveness of the pectoralis minor, as well as changes in the scapular position were observed after 4 weeks of push-up plus exercise by the subjects.

• Archives of Plastic Surgery
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• 제33권6호
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• pp.773-775
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• 2006

Purpose: The sternalis muscle is an accessory muscle of the anterior chest wall. This is a rare anatomic variant reported in approximately 8 percent of the population, with variation among races. While several anatomic studies of the sternalis muscle exist, nothing in the literature addresses the implications of this muscle on staged breast reconstruction with implant. Methods: We encountered two consecutive patients with a left sternalis muscle who underwent immediate staged breast reconstruction with a tissue expander. We offer a strategy for dealing with this rare, but known, anatomic variant during staged implant reconstruction. Firstly, recognizing the presence of a sternalis muscle mandates the elevation of the pectoralis major muscle and the sternalis muscle in continuity. Secondly, slight modifications must be made during the submuscular dissection to create a properly placed pocket for the tissue expander. Results: While our encounters with this anatomic variant are few, our experiences with two consecutive patients illustrate that the reconstructive surgeon must be familiar with the sternalis muscle and be prepared to adapt his or her technique for tissue expander placement when faced with this accessory muscle. Conclusion: To date, no reports exist in the literature describing the operative implications of this anatomic variant. We offer our technique for dealing with this accessory muscle during staged implant reconstruction of the breast.