Search published articles
Showing 3 results for Shoulder
Marzieh Mokarram, Majid Hojati,
Volume 4, Issue 2 (6-2016)
Abstract
The aim of the study is the classification of landform based on elevation, slope, relief and curvature inputs (old method) and topographic position index (TPI) (new method) in the south of Bojnoord. The input data for the two methods is a digital elevation model (DEM). The results of topographic position index (TPI) model showed that most area of landform were covered by class 5 (plains small) and the lowest area of landform was covered with open slope (class 6) (< 0.1%). The results of landform classification using elevation, slope, relief and curvature showed that the upper terraces (shoulder) were located in the many parts of the study area (green color). Plateau (back slope) landform was located in center, some parts of the west and south of the study area. In general, with increasing slope and elevation different types of landforms occur. Thus slope, elevation, relief and curvature are effective in preparing the landform classification map. The comparison of the two methods showed that the TPI method was more accurate because the method revealed more details.
Volume 9, Issue 3 (7-2024)
Abstract
Aims: To compare Ultra Sonography (USG) with Magnetic Resonance Image (MRI) in evaluation of lesions causing impairment of mobility of the shoulder joint.
Method and Materials: This study was a cross-sectional observational study. Sonographic examination of shoulder was done using a linear high-frequency probe (7.5-15 MHz) on Siemens machine and MRI evaluation was performed on 3T Siemens Skyra machine. Data was analyzed using standard statistical methods and results were compared with Arthroscopy where possible. According inclusion criteria the patients of all age groups presenting with symptoms of shoulder pain or restricted movement referred from department of orthopaedics were studied.
Findings: Fifty patients were included in the study. Sensitivity and specificity of USG in comparison with MRI for diagnosing supraspinatus, subscapularis, infraspinatus and long head of biceps tendon pathologies in our study were 95.4% and 100%, 66.6% and 100%, 60% and 100%, 80% and 100% respectively. Sensitivity and specificity of USG for detecting AC joint arthropathy were 88.2% and 100% respectively in our study. The Sensitivity and specificity of USG were 82.7% and 100% respectively in detecting Subacromial Subdeltoid bursitis (SASD) bursitis, which were similar to as in other studies in literature.
Conclusion: This study revealed that USG has a good sensitivity, specificity and diagnostic accuracy in diagnosing rotator cuff tendon tears and tendinosis as well as for diagnosis of Acromioclavicular (AC) joint arthroplasty. Moreover, it is a non-invasive technique, readily available and cost effective. MRI is best modality for diagnosing labro-ligamentous pathologies at the shoulder.
Volume 13, Issue 1 (1-2010)
Abstract
Objective: Due to the frequent use of surface electromyography as a tool for the study of muscle function, to accurately compare electromyographic data from different muscles and different subjects, it is necessary to normalize the integrated data obtained from each muscle. The most common normalization technique is the use of maximum voluntary isometric contraction (MVIC) of a predetermined isometric movement as the reference electromyographic signal.
The purpose of this study was to determine the Reproducibility of maximum voluntary isometric contraction of shoulder muscles in Empty Can position test and the correlation between force and MVIC of shoulder muscles.
Materials and Methods: The electromyographic activity of these four muscles (anterior and middle deltoid, upper and lower trapezius) was examined in 20 healthy subjects (10 men and 10 women with 31.25±8.92 age). Muscle force was determined by dynamometer. Each test repeated 3 times.
Results: Results showed that same day test retest reliability coefficients were significant (ICC>95%), but separate day test retest reliability coefficients were not significant.
Maximum muscle force did not relate to any of muscles MVIC amplitude.
Conclusion: Reproducibility results may be due to electrode placement, emotional and physical condition of subjects and the large range of motion of shoulder and compensatory movements of shoulder and trunk.
