The Influence of Psychosocial Stress, Gender, and Personality on Mechanical Loading of the Lumbar Spine
| Autor: | Kermit G. Davis, A.B. Maronitis, William S. Marras, Catherine A. Heaney, W. G. Allread |
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| Rok vydání: | 2000 |
| Předmět: |
Adult
Male medicine.medical_specialty Lifting media_common.quotation_subject Electromyography Weight-Bearing Muscle coactivation Sex Factors Physical medicine and rehabilitation Risk Factors medicine Humans Personality Orthopedics and Sports Medicine Big Five personality traits Muscle Skeletal media_common Hip Lumbar Vertebrae medicine.diagnostic_test business.industry Low back pain Biomechanical Phenomena medicine.anatomical_structure Physical therapy Anxiety Female Neurology (clinical) medicine.symptom Personality Assessment Inventory business Low Back Pain Psychosocial Stress Psychological Muscle Contraction |
| Zdroj: | Spine. 25:3045-3054 |
| ISSN: | 0362-2436 |
| DOI: | 10.1097/00007632-200012010-00012 |
| Popis: | Study design The effects of psychosocial stress on muscle activity and spinal loading were evaluated in a laboratory setting. Objective To evaluate the influence of psychosocial stress, gender, and personality traits on the functioning of the biomechanical system and subsequent spine loading. Summary of background data Physical, psychosocial, and individual factors all have been identified as potential causal factors of low back disorders. How these factors interact to alter the loading of the spine has not been investigated. Methods Twenty-five subjects performed sagittally symmetric lifts under stressful and nonstressful conditions. Trunk muscle activity, kinematics, and kinetics were used to evaluate three-dimensional spine loading using an electromyographic-assisted biomechanical model. A personality inventory characterized the subject's personality traits. Anxiety inventories and blood pressure confirmed reactions to stress. Results Psychosocial stress increased spine compression and lateral shear, but not in all subjects. Differences in muscle coactivation accounted for these stress reactions. Gender also influenced spine loading; Women's anterior-posterior shear forces increased in response to stress, whereas men's decreased. Certain personality traits were associated with increased spine loading compared with those with an opposing personality trait and explained loading differences between subjects. Conclusions A potential pathway between psychosocial stress and spine loading has been identified that may explain how psychosocial stress increases risk of low back disorders. Psychosocially stressful environments solicited more of a coactivity response in people with certain personality traits, making them more susceptible to spine loading increases and suspected low back disorder risk. |
| Databáze: | OpenAIRE |
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