• Title/Summary/Keyword: Pectoralis major

Search Result 201, Processing Time 0.032 seconds

Comparison of EMG Activity for Pectoralis Major Muscle During Shoulder Movement With Various Abduction Angle and Rotation Position (견관절 외전 각도와 회전 자세에 따른 대흉근 활성도 비교)

  • Jung, Doh-Heon;Lee, Won-Hwee;Oh, Jae-Seop
    • Physical Therapy Korea
    • /
    • v.17 no.1
    • /
    • pp.1-8
    • /
    • 2010
  • The purpose of this study was to compare EMG activity for pectoralis major muscle during shoulder movement with various abduction angle and rotation position in supine position. Fifteen healthy subjects were recruited for this study. All subjects performed shoulder horizontal adduction holding a 2 kg dumbbell in shoulder abduction $40^{\circ}C$, $70^{\circ}C$, $90^{\circ}C$, $130^{\circ}C$, $160^{\circ}C$ with shoulder neutral, internal rotation (IR), and external rotation (ER). Surface EMG activity was recorded from pectoralis major clavicle part and pectoralis major sternum part for 5 seconds and EMG activity was normalized to the value of maximal voluntary isometric contraction (%MVIC). Dependent variables were examined with 3 (Neutral, IR, ER) ${\times}$ 5 ($40^{\circ}C$, $70^{\circ}C$, $90^{\circ}C$, $130^{\circ}C$, $160^{\circ}C$) analysis of variance with repeated measures. The EMG activity of pectoralis major muscle was significantly different between shoulder abduction angles and between shoulder rotation positions (p<.05). The highest value of EMG activity of pectoralis major clavicle part among shoulder abduction angles was in $70^{\circ}C$ and, $90^{\circ}C$ in that order. The highest value of EMG activity of pectoralis major sternum part among shoulder abduction angles was in $130^{\circ}C$ and, $90^{\circ}C$ in that order. According to the rotation degree, shoulder ER showed the highest value and IR showed the lowest value in both muscle parts. These results suggest that shoulder abduction $70^{\circ}C$, $90^{\circ}C$, $130^{\circ}C$ will be effective during manual muscle testing (MMT) and strengthening exercise for pectoralis major muscle. It is also supposed that shoulder ER is the efficient posture for strengthening of pectoralis major muscle.

Effects of Shortening of Pectoralis Minor Muscle on Muscle Activity of Trapezius and Pectoralis Major Muscles (작은가슴근의 단축이 등세모근과 큰가슴근의 근 활성도에 미치는 영향)

  • Yang, Hoesong;Bae, Sehyeon
    • Journal of The Korean Society of Integrative Medicine
    • /
    • v.1 no.4
    • /
    • pp.85-92
    • /
    • 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.

RECONSTRUCTION OF A "THROUGH-AND-THROUGH" DEFECT OF BUCCAL CHEEK WITH BILOBULAR PECTORALIS MAJOR MYOCUTANEOUS ISLAND FLAP;REPORT OF A CASE & COMPARISON WITH A CONVENTIONAL PECTORALIS MAJOR MYOCUTANEOUS FLAP (이엽성 대흉근도상피판을 이용한 협부 관통결손부의 재건;증례보고 및 통상적인 대흉근피판과의 비교)

  • Kim, Tae-Seup;Kim, Eun-Seok;Kim, Jae-Jin
    • Maxillofacial Plastic and Reconstructive Surgery
    • /
    • v.23 no.3
    • /
    • pp.248-253
    • /
    • 2001
  • Main disadvantages of conventional pectorails major myocutaneous flap is bulkness of muscular pedicle. It makes difficult to use this flap in a case of supraomohyoid neck dissection. Pectoralis major myocutaneous island flap is a modification to overcome this shortcoming. And bilobular design of skin portion of this flap could be used for reconstruction of a through and through defect. We report a case of reconstruction of full-thickness defect of cheek with bilobular pectoralis major myocutaneous island flap and compare it with conventional pectoralis myocutaneous flap.

  • PDF

A review of chronic pectoralis major tears: what options are available?

  • Joshua R. Giordano;Brandon Klein;Benjamin Hershfeld;Joshua Gruber;Robert Trasolini;Randy M. Cohn
    • Clinics in Shoulder and Elbow
    • /
    • v.26 no.3
    • /
    • pp.330-339
    • /
    • 2023
  • Rupture of the pectoralis major muscle typically occurs in the young, active male. Acute management of these injuries is recommended; however, what if the patient presents with a chronic tear of the pectoralis major? Physical exams and magnetic resonance imaging can help identify the injury and guide the physician with a plan for management. Nonoperative management is feasible, but is recommended for elderly, low-demand patients whose functional goals are minimal. Repair of chronic tears should be reserved for younger, healthier patients with high functional demands. Although operative management provides better functional outcomes, operative treatment of chronic pectoralis tears can be challenging. Tendon retraction, poor tendinous substance and quality of tissue, muscle atrophy, scar formation, and altered anatomy make direct repairs complicated, often necessitating auto- or allograft use. We review the various graft options and fixation methods that can be used when treating patients with chronic pectoralis major tears.

Breast Reconstruction by Pectoralis Major Muscle Transfer with Implants after Skin Sparing Partial Mastectomy (피부보존 유방절제술 후 대흉근전위술과 유방삽입물을 이용한 유방재건술)

  • Park, Jung Min;Kwon, Yong Seok;Lee, Keun Cheol;Kim, Seok Kwun;Lee, Jin Hwa;Jho, Sae Heon
    • Archives of Plastic Surgery
    • /
    • v.32 no.5
    • /
    • pp.573-581
    • /
    • 2005
  • Breast cancer is the second leading cause of death in woman. Unfortunately, the frequency of breast cancer and mastectomy are increasing in Korea. This paper introduces the breast reconstruction by use of pectoralis major muscle transfer with breast implant for small size defect after skin sparing mastectomy for more satisfaction. We reviewed 24 consecutive patients who underwent breast reconstruction by pectoralis major muscle transfer with implant and only breast implant in Dong-A University from April 2002 to March 2004. The patient's age ranged between 29 and 54 years with mean of 42.3 years. We used pectorals major muscle transfer with breast implant in 12 patients and breast implant alone in 12 patients as control. The follow-up period of patients ranged from 10 months to 3 years with mean of 18.5 months. The points of comparison with control group reconstructed by breast implant alone were doctor and patient satisfaction score, operation time, duration of admission, amount of drainage, complication and satisfaction according to mass location. In conclusion, there is no difference with control group in the point of operation time, mount of drainage, duration of admission. And there is higher level of doctor's and patient's satisfaction in group reconstructed by pectoralis major muscle transfer with breast implant than implant only group. Especially, pectoralis major muscle transfer with breast implant was especially necessary for the defect in upper lateral quadrant of the breast to get more satisfaction. The advantage of pectoralis major muscle transfer with breast implant is prevention of the protruding and palpability of implant and aesthetically satisfactory result by intraoperative modification of breast shape.

Analysis of 120 Pectoralis Major Flaps for Head and Neck Reconstruction

  • You, Young Sun;Chung, Chul Hoon;Chang, Yong Joon;Kim, Kuyl Hee;Jung, Sung Won;Rho, Young Soo
    • Archives of Plastic Surgery
    • /
    • v.39 no.5
    • /
    • pp.522-527
    • /
    • 2012
  • Background A pectoralis major flap is one of the standard tools for the reconstruction of defects of the head and neck. Despite the technical advancement in free tissue transfer in head and neck reconstruction, the benefits of a pectoralis major flap should not be overlooked. The purpose of this study is to evaluate our 17 years of experience in reconstructing defects of the head and neck region using the pectoralis major flap. Methods We retrospectively reviewed the medical records of 112 patients (120 cases) who underwent pectoralis major flap operations for head and neck reconstruction during a period ranging from 1994 to 2010. Results In our series, no total necrosis of the flap occurred. Of the total cases, 30.8% presented with flap-related complications. Major complications occurred in 20% of all of the cases but were then all successfully treated. The male sex was correlated with the occurrence of overall complications (P=0.020) and major complications (P=0.007). Preoperative albumin levels of <3.8 g/dL were correlated with the formation of fistula (P=0.030). Defects of the hypopharynx were correlated with the occurrence of major complications (P=0.019) and the formation of fistula (P=0.012). Secondary reconstructions were correlated with the occurrence of overall complications (P=0.013) and the formation of fistula (P=0.030). Conclusions A pectoralis major flap is still considered to be a safe, versatile one-stage reconstruction procedure in the management of the defects of head and neck and the protection of the carotid artery.

PECTORALIS MAJOR MYOCUTANEOUS FLAP FOR THE COMPLICATIONS OF POSTIRRADIATION HEAD & NECK CANCER SURGERY (방사선 치료후 두경부암 수술의 합병증에 대한 Pectoralis Major Myocutaneous Flap의 이용)

  • 송달원;백재한;김중강
    • Proceedings of the KOR-BRONCHOESO Conference
    • /
    • 1987.05a
    • /
    • pp.19.2-19
    • /
    • 1987
  • 방사선치료후 재발성 또는 잔존성 두경부암의 수술후에 피부판의 괴사 및 slough, 감염, 누공, 부종과 경동맥 노출 심지어는 경동맥 파열 등의 술후 합병증이 빈발함으로 수술에 큰 어려움을 겪게 된다. Pectoralis major myocutaneous flap은 진행된 두경부암의 광범위한 절제후에 그 결손부를 보충해 주는 데 좋은 방법으로 사용할 수 있을 뿐아니라 방사선치료후에 생긴 합병증에도 이 flap을 이용하여 좋은 치료결과를 얻을 수 있다. 저자들은 수술 전에 방사선치료를 받고 심한 부종으로 후두조직의 괴사 및 기능이 손실된 환자와 방사선 치료후 재발된 상인두암환자의 경우에서 수술 후 생긴 pharyngocutaneous fistula와 피부판감염 및 경동맥노출 등으로 치유가 곤란하여 여기에 pectoralis major myocutaneous flap을 사용하여 pharyngostoma를 재건하고 노출된 경동맥부위를 보호하여 좋은 치료효과를 얻었기에 문헌을 고찰하여 보고하는 바이다.

  • PDF

Selective Activation of Serratus Anterior Using Electromyography Biofeedback During Push-Up Plus (푸시업플러스 시 근전도 바이오피드백을 이용한 전거근의 선택적 강화)

  • Jeon, Yong-Jin;Choung, Sung-Dae;Kim, Si-Hyun;Cynn, Heon-Seock
    • Physical Therapy Korea
    • /
    • v.18 no.1
    • /
    • pp.1-8
    • /
    • 2011
  • Push-up plus has been advocated for increasing the activity of the serratus anterior muscle, the most critical scapular stabilizer. However, no previous study has reported the possibility of compensatory motion on the part of the pectoralis major, which could substitute for the action of the serratus anterior during push-up plus. The aim of the current study was to investigate the immediate effect of electromyography (EMG) biofeedback of the pectoralis major muscle on the pectoralis major, upper trapezius, and serratus anterior muscles during push-up plus. Fourteen healthy young subjects voluntarily participated in this study; each subject performed push-up plus from the quadruped position, in two conditions (i.e., with or without visual and auditory biofeedback). Surface EMG was used to measure pectoralis major, serratus anterior, and upper trapezius activity. A paired t-test was used to determine any statistically significant difference between the two conditions. Additionally, effect size was calculated to quantify the magnitude of EMG biofeedback in each muscle. Visual and auditory feedback reduced pectoralis major muscle activity significantly (p=.000) and increased the serratus anterior muscle activity significantly (p=.002), but did not induce a significant difference in upper trapezius muscle activity (p=.881). Thus, it is concluded that the visual and auditory feedback of pectoralis major muscle activity can be used to facilitate serratus anterior muscle activity during push-up plus.

Poland Syndrome - A Case Report- (Poland 증후군 - 1예 보고 -)

  • Jeong, Soon-Taek;Moon, Dong-Kyu;Sung, Chang-Meen;Park, Hyung-Bin
    • Clinics in Shoulder and Elbow
    • /
    • v.13 no.1
    • /
    • pp.123-126
    • /
    • 2010
  • Purpose: Poland syndrome is rare disease which is characterized by absence of unilateral pertoralis major muscle accompanied by ipsilateral syndactyly or brachydactyly, which was described first by Alfred Poland in 1841. Materials and Methods: We performed the physical examination, laboratory test and radiologic evaluation to 18 year old male, who complaint asymmetry of right anterior chest. Results: We diagnosed the Poland syndrome due to absence of right pectoralis major muscle and brachydactyly of right hand. Conclusion: Current authors report a patient who had hypopalsia of pectoralis muscles, which needed differential diagnosis with pectoralis major rupture.

The Effect of Open and Close Kinetic Chain Exercise on the Muscle Activity of Pectoralis Major and Triceps (열린사슬운동과 닫힌사슬운동이 큰가슴근과 위팔세갈래근의 근활성도에 미치는 영향)

  • Kim, Ju-O;Jang, Sang-Hun
    • Journal of Korean Physical Therapy Science
    • /
    • v.25 no.1
    • /
    • pp.52-61
    • /
    • 2018
  • Background: The purpose of this study was to investigate the effect of open and close kinetic chain exercise on the muscle activity of pectoralis major and triceps. Method: Twenty healthy male college students were assessed three times over two weeks. The participants were randomly assigned to OKCE(Open Kinetic Chain Exercise) and CKCE(Close Kinetic Chain Exercise). On the first day, the 7th day and the last day, The MP(mean power) and PT(peak torque) of the PM(pectoralis major) and TR(triceps) during the exercise were measured with an electromyography device and the study was compared. Result: In the present study, it was found that Statistical analysis of the measured values at the end of experimental period revealed statistically significant differences in the MP and PT values of TR and PM. Conclusion: These findings suggest that CKCE and OKCE may be an effective physical therapy intervention for strengthening muscular activity in patients with low activity in the upper limb, including normal subjects, although it is not suitable for effective exercise by selecting either CKCE or OKCE.