Changes in Electromyographic Activity Associated with Occupational Stress and Poor Performance in the Workplace

Gomer, Frank E.; Silverstein, Louis D.; Berg, Wendy K.; Lassiter, Donald L.

doi:10.1177/001872088702900202

Cited by 25 publications

(13 citation statements)

References 15 publications

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“…A high position of the thyroid cartilage and hyoid bone, and high muscular tension in the head and neck region are considered to be part of hypertonic voice use, as mentioned by several authors [1,6,16,17] . However, others explain the perilaryngeal muscle hypertonicity as a result, partially, of psycho-emotional stress, as is the case in the Repetitive Strain Injury Syndrome [2,[23][24][25][26] . Physical stressors, like noise, environmental vibrations, as well as mental stressors, force an individual to use higher levels of muscular stiffness to achieve a same level of precision of activity.…”

Section: Discussionmentioning

confidence: 99%

Muscular Tension and Body Posture in Relation to Voice Handicap and Voice Quality in Teachers with Persistent Voice Complaints

Kooijman¹,

Jong²,

Oudes³

et al. 2005

Folia Phoniatr Logop

113

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The aim of this study was to investigate the relationship between extrinsic laryngeal muscular hypertonicity and deviant body posture on the one hand and voice handicap and voice quality on the other hand in teachers with persistent voice complaints and a history of voice-related absenteeism. The study group consisted of 25 female teachers. A voice therapist assessed extrinsic laryngeal muscular tension and a physical therapist assessed body posture. The assessed parameters were clustered in categories. The parameters in the different categories represent the same function. Further a tension/posture index was created, which is the summation of the different parameters. The different parameters and the index were related to the Voice Handicap Index (VHI) and the Dysphonia Severity Index (DSI). The scores of the VHI and the individual parameters differ significantly except for the posterior weight bearing and tension of the sternocleidomastoid muscle. There was also a significant difference between the individual parameters and the DSI, except for tension of the cricothyroid muscle and posterior weight bearing. The score of the tension/posture index correlates significantly with both the VHI and the DSI. In a linear regression analysis, the combination of hypertonicity of the sternocleidomastoid, the geniohyoid muscles and posterior weight bearing is the most important predictor for a high voice handicap. The combination of hypertonicity of the geniohyoid muscle, posterior weight bearing, high position of the hyoid bone, hypertonicity of the cricothyroid muscle and anteroposition of the head is the most important predictor for a low DSI score. The results of this study show the higher the score of the index, the higher the score of the voice handicap and the worse the voice quality is. Moreover, the results are indicative for the importance of assessment of muscular tension and body posture in the diagnosis of voice disorders.

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Section: Discussionmentioning

confidence: 99%

Muscular Tension and Body Posture in Relation to Voice Handicap and Voice Quality in Teachers with Persistent Voice Complaints

Kooijman¹,

Jong²,

Oudes³

et al. 2005

Folia Phoniatr Logop

113

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“…The findings of a high position of the thyroid cartilage and hyoid bone and high muscular tension of the head and neck region are considered to be associated with 'hypertonic' voice use. This may be due to psychoemotional stressors, as is the case in the repetitive strain injury syndrome [47][48][49][50][51][52].…”

Section: Discussionmentioning

confidence: 99%

A Psychological Cascade Model for Persisting Voice Problems in Teachers

Jong

Cornelis²,

Wuyts

et al. 2003

Folia Phoniatr Logop

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In 76 teachers with persisting voice problems, the maintaining factors and coping strategies were examined. Physical, functional, psychological and socioeconomic factors were assessed. A parallel was drawn to a psychological cascade model designed for patients with chronic back pain. The majority of the patients were found to be in a deadlocked situation (phase 1 of the cascade model), for which the combination of externalization and unawareness of the situation is the main risk factor. Subjective rating of the voice problem was assessed by the Voice Handicap Index (VHI) and a visual analogue scale (VAS). Patients in phase 1 of the cascade model showed higher VHI and VAS scores compared with the other patients. For a high VHI score, the combination of socioeconomic factors and being in phase 1 was the most important risk factor. Socioeconomic factors were the most important risk factors for a high VAS score. We introduce the term ‘chronicity’, which means that the problems are maintained, the patient finds himself in a deadlocked situation, and is sliding down into a chronic disease. ‘Chronicity’ is essentially different from ‘chronic’, which refers only to the duration of the disease. We consider maintaining factors and (inadequate) coping factors, which consist of emotional/psychological, physical and socioeconomic aspects, as indicators for chronicity.

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“…일반적으로 신호의 안정성이 보장되어 야 주파수 분석결과에 대한 신뢰성을 확보할 수 있다. (Gomer, et al, 1987;Schoenmarklin and Marras, 1989).…”

Section: 정적 상황에서 근전도 분석unclassified

Biomechanical Measuring Techniques for Evaluation of Workload

Kim¹,

Park²,

Cho³

2010

Journal of the Ergonomics Society of Korea

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It is necessary to quantitatively evaluate the workload of workers in order to improve the level of safety and efficiency as well as to prevent workers from musculoskeletal disorders. The purpose of this study is to introduce biomechanical methods that are largely used to quantitatively evaluate workload. The biomechanical methods use kinematics and kinetics to analyze the movement and force of biomechanical body. Motion analysis, joint angle measurement, ground reaction force, mathematical model, and electromyography (EMG) were introduced as a tool or device for biomechanical evaluation. In this study, the special feature of each method was emphasized and important tips for field measurement were summarized. The information and technique disclosed in this summary can be used to evaluate and design the workplace better by effectively control the workload of field workers.

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Changes in Electromyographic Activity Associated with Occupational Stress and Poor Performance in the Workplace

Cited by 25 publications

References 15 publications

Muscular Tension and Body Posture in Relation to Voice Handicap and Voice Quality in Teachers with Persistent Voice Complaints

Muscular Tension and Body Posture in Relation to Voice Handicap and Voice Quality in Teachers with Persistent Voice Complaints

A Psychological Cascade Model for Persisting Voice Problems in Teachers

Biomechanical Measuring Techniques for Evaluation of Workload

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