지각 불편도에 근거한 복합 목 동작 분류 체계

기도형(Dohyung Kee) 대한인간공학회 2020 大韓人間工學會誌 Vol.39 No.5

Objective: The objectives of this study are to investigate effects of complex neck motions including flexion/extension, rotation, and lateral bending on perceived discomfort, and to develop a new posture classification scheme for complex neck motions based on the perceived discomfort. Background: As the use of computers and smart phones is increased, neck relevant disorders are increasing. For preventing or reducing the disorders, postural load for neck motions should be precisely quantified. There is a lack of study or assessment tool for complex neck motions. Method: An experiment for measuring perceived discomfort according to complex neck motions was performed, in which neck motions of flexion/extension, rotation, and lateral bending were used as independent variables. Discomfort according to complex neck motions was used as dependent variable and measured by using the Borg CR10. Sixteen healthy male college students without histories of musculoskeletal disorders participated in the experiment. Results: ANOVA revealed that while the interactions between the independent variables were not significant, single factors of flexion/extension, rotation, and lateral bending affected significantly on the discomfort at α = 0.01. Based on the results, a new posture classification scheme for complex neck motions was developed and validated. Conclusion: This study investigated effects of complex neck motions on perceived discomfort, and developed a new classification scheme of complex neck motions. Application: The results of this study will help more precisely assess postural load according to complex neck motions as well as to develop a new posture classification scheme.

Development and Evaluation of the Neck Supporter for Preventing Neck-related MSDs

Yong-Ku Kong,Jun-Goo Han 대한인간공학회 2011 大韓人間工學會誌 Vol.30 No.2

Many WMSDs(work-related-musculoskeletal disorders) have been reported in diverse industries and have also attracted much attention in recent years. Neck-related MSD is generally known as one of common WMSDs, especially it happens to workers who are working at the automobile assembly plants and/or shipyards. The awkward posture is considered as a main cause of neck-related MSDs. A neck supporter was developed to prevent neck-related MSDs, and 10 males were recruited to evaluate the newly developed neck supporter by measuring subjective discomfort ratings of whole body, shoulder, neck and neck-muscle activities. Muscle activities from four neck muscle groups(left/right sternocleidomastoid and upper/ middle trapezius) were measured while simulating an automobile assembly task. Results showed that the neck supporter help to significantly improve subjective discomfort for whole-body, shoulder as well as neck body parts. The analyses of muscular activities also showed that the activities of left/right sternocleidomastoid muscles were statistically decreased with the neck supporter in this study. The muscle activities of upper/middle trapezius in case of wearing the neck supporter were not significantly different with the muscle activities in case of no-wearing the neck supporter. Overall findings verified that the neck supporter might help to prevent neck-related MSDs based on the current study.

Effects of Shoulder Taping on Discomfort and Electromyographic Responses of the Neck While Texting on a Touchscreen Smartphone

Areeudomwong, Pattanasin,Oapdunsalam, Konnika,Havicha, Yupadee,Tantai, Sawit,Buttagat, Vitsarut Occupational Safety and Health Research Institute 2018 Safety and health at work Vol.9 No.3

Background: Prolonged neck flexion during smartphone use is known as a factor of neck pain and alteration of neck muscle activity. Studies on the effects of shoulder taping on neck discomfort and neck muscle responses while texting on a smartphone are still lacking. The aim of this study was to examine the effects of shoulder taping on neck discomfort using a numerical rating scale, and neck muscle activity and fatigue using a surface electromyography during a texting task on a touchscreen smartphone. Methods: Twenty-five healthy adolescents used the dominant hand to perform a 30-minute texting task using a touchscreen smartphone at two separate times under one of the following two conditions: taping across the upper trapezius muscle and no taping. Neck discomfort, normalized root mean square, and normalized median frequency slopes for upper trapezius, cervical erector spinae, and sternocleidomastoid muscles were recorded. Results: The results revealed that shoulder taping provided significantly lower neck discomfort than no taping (p < 0.001). However, shoulder taping did not significantly alter normalized root mean square and normalized median frequency slope values of all muscles when compared with no taping controls. Conclusion: Shoulder taping reduces neck discomfort but does not affect neck muscle activity and fatigue while texting on a touchscreen smartphone.

Effects of Shoulder Taping on Discomfort and Electromyographic Responses of the Neck While Texting on a Touchscreen Smartphone

Pattanasin Areeudomwong,Konnika Oapdunsalam,Yupadee Havicha,Sawit Tantai,Vitsarut Buttagat 한국산업안전보건공단 산업안전보건연구원 2018 Safety and health at work Vol.9 No.3

Background: Prolonged neck flexion during smartphone use is known as a factor of neck pain and alteration of neck muscle activity. Studies on the effects of shoulder taping on neck discomfort and neck muscle responses while texting on a smartphone are still lacking. The aim of this study was to examine the effects of shoulder taping on neck discomfort using a numerical rating scale, and neck muscle activity and fatigue using a surface electromyography during a texting task on a touchscreen smartphone. Methods: Twenty-five healthy adolescents used the dominant hand to perform a 30-minute texting task using a touchscreen smartphone at two separate times under one of the following two conditions: taping across the upper trapezius muscle and no taping. Neck discomfort, normalized root mean square, and normalized median frequency slopes for upper trapezius, cervical erector spinae, and sternocleidomastoid muscles were recorded. Results: The results revealed that shoulder taping provided significantly lower neck discomfort than no taping (p < 0.001). However, shoulder taping did not significantly alter normalized root mean square and normalized median frequency slope values of all muscles when compared with no taping controls. Conclusion: Shoulder taping reduces neck discomfort but does not affect neck muscle activity and fatigue while texting on a touchscreen smartphone.

치과의사의 근골격계 장애에 관한 연구

유종희,정성창 대한 두개하악장애학회 1994 대한두개하악장애학회지 Vol.6 No.2

The purpose of this work is to study the frequency of pain and discomfort in the musculoskeletal system among dentists, above all concerning head, neck and shoulder pain and to find possible correlations between these symptoms and various working positions and different working actions. A questionnaire was answered by 425 dentists with more than one year working experience (80% male, 20% female). The age varied from 25 to 67 years and mean age was 34.8 years. The dentists had worked on the average for 9.1 years. The obtainded results were as follows. 1. Dentists usually were at 10, 11, 9 o'clock position in treating upper and lower teeth, and 40% of dentists suffered from pain and discomfort in the neck were at 10 o'clock position in treating lower teeth (p<0.05). 2. During the past 12 months, 152 dentists(35.5%) suffered from headache, 208(48.9%) from pain and discomfort in the neck, 208(48.9%) from pain and discormfort in the shoulders and 188(44.2%) from pain in the lower back. 3. During the past one week, 50 dentists (11.8%) suffered from headache, 91(21.4%) from pain and discomfort in the neck, 86(20.2%) from pain and discomfort in the shoulders and 80(18.8%) from pain and discomfort in the lower back. 4. During the past 12 months, female dentists had a higher frequency of the pain and discomfort in the head, neck and shoulders than male dentists. During the past 1 week, female dentists had more lower backache additionally. 5. During the past 12 months the frequency of pain and discomfort in the head (p<0.05) and neck (p<0.01), during the past 1 week the frequency of pain and discomfort in the neck(p<0.01) and shoulders (p<0.05) had a tendency to decrease with age and the number of practice.

갑상선 절제술 후 경부불편감의 경감을 위한 조기 경부운동의 효과 분석: 무작위 전향적 연구

장전엽,장영수,김은혜,문정환,손영익 대한갑상선학회 2014 International Journal of Thyroidology Vol.7 No.1

Background and Objectives: To evaluate the efficacy and safety of early neck exercises to reduce post-thyroidectomy symptoms and syndromes for patients undergoing thyroid surgery. Materials and Methods: One hundred patients who had undergone thyroid surgery were randomly assigned 1:1 to control (delayed exercise, initiating at postoperative 2 weeks) or early exercise group (initiating at postoperative 1 day). Questionnaire survey (voice, globus sense, neck discomfort, swallowing difficulty) and objective measurement (surgical wound adhesion, range of neck motion and scar scale) were performed at 2 weeks and 3 months postoperatively. Results: Compared to control, early exercise significantly decreased the degree of neck discomfort at 2 weeks after thyroid surgery (p=0.037) while other subjective symptoms including voice change, globus sense, and swallowing difficulty were not significantly different between the two groups. The degree of surgical wound adhesion was significantly decreased (p<0.001) and the range of motion was improved in early exercise group (p=0.010). In addition, the objective scores of Vancouver Scar Scale (VSS) were decreased in early exercise group compared to those of control group (p=0.020). Conclusion: Early neck exercises are safe and effective to reduce postoperative neck discomfort, wound adhesion, or hypertrophy of scar and to improve the range of motion in patients undergoing thyroid surgery.

갑상선수술 후 유착

김영민(Young Min Kim),김수진(Su jin Kim),이진욱(Jin Wook Yi),성찬용(Chan Yong Seong),김종규(Jong Kyu Kim),유형원(Hyeong Won Yu),채영준(Young Jun Chai),최준영(June Young Choi),이규언(Kyu Eun Lee) 대한갑상선-내분비외과학회 2016 The Koreran journal of Endocrine Surgery Vol.16 No.4

Purpose: Postoperative adhesion after thyroidectomy results in neck discomfort and swallowing difficulty. However, risk factors for adhesive symptom after thyroidectomy have not been well studied. This study evaluated symptoms related to postoperative adhesion after thyroidectomy. Methods: The Glasgow-Edinburgh Throat Scale (GETS) questionnaire was used to evaluate postoperative adhesion. Patients who completed the GETS questionnaire either pre- or post- operatively were enrolled. Patient clinical and pathological details including age, gender, body weight, body mass index (BMI), tumor size, thyroid volume, extent of thyroidectomy, postoperative months, and neck thickness on ultrasonography and computed tomography (CT) were abstracted. Results: Twenty-eight preoperative (22 females, six males) and 101 postoperative (83 females, 18 males) patients were enrolled. The mean age of the pre-operative enrollees was 52.1±11.7, and of post-operative enrollees 51.8±12.4 years. Patients who were within one month post-surgery had higher GETS scores than preoperative patients (27.4±20.1 vs. 6.5±11.1, P<0.001). Two months after surgery, GETS scores of postoperative patients did not differ significantly from the scores of the preoperative patients. There were no significant associations between clinical and pathologic features (age, tumor size, BMI, neck thickness on ultrasonography and CT) and GETS scores. Conclusion: Postoperative adhesive symptoms were most severe at one month after surgery, while questionnaire scores two months after surgery were comparable with preoperative patients. Further studies will be required for better understanding of the natural course of postoperative adhesion after thyroidectomy.

Antiadhesive effect and safety of oxidized regenerated cellulose after thyroidectomy

Kyoung Sik Park,Kyu Eun Lee,Do Hoon Ku,Su-Jin Kim,Won Seo Park2,Hoon Yub Kim3,,Mi Ra Kwon1,Yeo-Kyu Youn1 대한외과학회 2013 Annals of Surgical Treatment and Research(ASRT) Vol.84 No.6

Purpose: To evaluate the antiadhesive effects and safety of an oxidized regenerated cellulose (Interceed) after thyroidectomy. Methods: Seventy-six thyroidectomized patients were prospectively randomized into two groups with regard to the use of Interceed. We evaluated each group for their adhesive symptoms using four subjective and four objective items at the 2nd week, 3rd and 6th month after thyroidectomy. All patients were examined for vocal cord motility by indirect laryngoscope at each period. Results: Total adhesion scores at each postoperative follow-up period decreased with time, but were not significantly different in each group. The median score for swallowing discomfort for liquid was significantly lower in the Interceed group than in the control group 2 weeks after surgery. In addition, the severity of skin adhesion to the trachea was reduced in the Interceed group compared with the control group 6 months after surgery. During the study, there were no adverse effects or significant differences in postoperative complications between the groups. Conclusion: Interceed appeared to be safe and effective in improving neck discomfort at early postoperative periods and preventing skin adhesion to the trachea 6 months after thyroidectomy.

Head flexion posture of smartphone users

Sojeong Lee,Hwa yeong Kang,Gwanseob Shin 대한인간공학회 2013 대한인간공학회 학술대회논문집 Vol.2013 No.10