Poster 355 Acute Calcific Tendonitis of the Longus Colli Muscle in a Patient with Neck Pain and Stiffness: A Case Report

Abstract

with initial RCSPA . Mean RCSPA was found to improve in all subgroups of subjects following insole fitting. Moreover, in children younger than 7 years, RCSPA improved greatly from the insole fitting compared to the children aged 7 years old and older. This indicates that the younger the children are, the more prominent the effectiveness of the insole is. Moreover, it was found that the initial RCSPA increased with increasing age of children. Conclusion: The insole has proven to be effective in all population aged younger than 13. However, there may be a hidden effect of normal structural pedal alignment during growth accompanied with bony maturation and developmental process. Controversy still exists whether the treatment of flexible flatfoot is necessary in the vast majority of cases or simple observation and advice to parents is sufficient. Further study might be performed to compare subjects with insole fitting and without and to see what is going to happen between two groups. Objective: To test hypothesis that lumbar multifidus muscles are more vulnerable to physiological muscle fatigue than thoracic erector spinae muscles in the continuous stooped posture at work place. Design: Quasi-experiment Setting: Biomechanics laboratory with wireless surface electromyography (EMG) monitoring system. Participants: Eighteen male subjects, 18-32 years of age. Interventions: We performed static tests to subjects keeping continuous stooped posture for 10 minutes. Each subject was asked to bend forward while maintaining straight legs. Their flexion angle of T12-S1 vertebra was controlled at 40 degree. Wireless surface EMG data were recorded from bilateral lumbar multifidus and thoracic erector spinae muscles from each subject during the whole task. Main Outcome Measures: Mean frequency (MNF) of surface EMG data was calculated by the sum of product of the EMG power spectrum and the frequency divided by the total sum of the power spectrum. The decline of MNF was analyzed by linear regression. Visual analog scale (VAS) on back pain was recorded at task discontinuation. Results or Clinical Course: Sixteen of 18 subjects discontinued stooping task before 10 minutes due to excessive back pain and fatigue. Mean VAS score was 7.3(range, 6-9) points. Mean and minimum task duration was 385 and 224 seconds respectively. We analyzed EMG data during initial 224 seconds from 16 subjects who has fulfilled quality criteria. Consistent decline of MNF values was demonstrated only in lumbar multifidus muscles. The coefficients of determination from linear regression model were above 0.5 in 7 subjects. In thoracic erector spinae muscles, there is no tendency of MNF decline. Conclusion: In the stooped posture both lumbar multifidus and thoracic erector spinae muscles were activated, but there is a tendency of earlier fatigability in lumbar multifidus. Endurance of lumbar multifidus may be a limiting factor for maintenance of stooped posture.Case Description: An otherwise healthy 37-year-old male patient presented with a 3-day history of acute-o...