Observation on the Effect of Shoulder Pain Caused by Volleyball Training Injury Based on MRI Image Scanning.

In order to observe the effect of MRI image scanning on shoulder pain caused by volleyball training injury, this paper proposes to analyze the value of MR arthrography and conventional MRI image scanning in the diagnosis of shoulder injury. Taking the female volleyball players in a no. 1 middle school for nearly ten years as the research object, the injury investigation and statistics were carried out. The shoulder joint injury was investigated using arthroscopy and no injury was found. All patients underwent MR arthrography and routine MRI image scanning after admission. All patients underwent MR arthrography and routine MRI image scanning after admission. The patient took the flat lying position and put their arms flat on both sides of the body, and the Philips Achieva 3.0T MRI image scanning and Sense Flex M soft coil for MRI image scanning detection were used. The plain scan included oblique sagittal, axial, and oblique coronal proton density weighted image sequences; echo chain ETL = 6, TR/TE 2300/25 ms; and oblique sagittal and oblique coronal SET1W1; TRTE is 400/10 ms. Comparison was made with regard to the sensitivity, specificity, Jordan index, and accuracy of MR arthrography versus conventional MRI imaging in the diagnosis of shoulder injuries. The results were 38 true positives, 19 true negatives, 1 false positive, and 2 false negatives; a normal MRI scan showed 33 true positives, 13 true negatives, 7 false positives, and 7 false negatives. MR arthrography is more accurate than MRI image scanners in the diagnosis of shoulder injuries.

Modeling and Analysis of the Relationship between Aerobic Exercise and Obesity Reduction in Adolescents.

In order to solve the relationship between youth aerobic exercise and obesity reduction, an improved ant colony algorithm-oriented aerobic exercise method was proposed. Firstly, the changes in body shape, weight, BMI, body fat, body circumference, and other indicators of obese adolescents before and after aerobic exercise were used as the initial pheromone distribution matrix, and the random evolution factor and evolutionary drift threshold were introduced to establish the target function of reducing obesity caused by aerobic exercise in adolescents. The constraint conditions of the relationship between aerobic exercise and adolescent obesity reduction were explained, and the particle algorithm was introduced to establish the optimal model of aerobic exercise for adolescent obesity reduction. The experimental results show that with the increasing number of experiments, the advantages of this method are more obvious. From the overall level, the average modeling error of this method is about 0.053%, while the average error of the traditional method is about 0.186%, which shows that this method can control the error within a reasonable range, and it is proved that the improved ant colony algorithm can have a good correlation with the method of aerobic exercise.

Effects of focal mild hypothermia on thrombin-induced brain edema formation and the expression of protease activated receptor-1, matrix metalloproteinase-9 and aquaporin 4 in rats.

Hypothermia is an effective neuroprotective treatment for brain injury caused by intracerebral hemorrhage (ICH). It is reported to reduce brain edema and neuronal cell death. Thrombin, a coagulation protease released from blood clots, is critical in brain edema formation following ICH. Protease activated receptor­1 (PAR­1), matrix metalloproteinase­9 (MMP­9) and aquaporin 4 (AQP4) are edema­associated mediators that have been implicated in ICH pathology. In the present study, thrombin was used to induce brain edema in adult male Sprague­Dawley rats. Differences between a focal mild hypothermic group (33±0.5˚C) and a normothermic group (37˚C) were investigated. Following hypothermia, brain water content and blood­brain barrier (BBB) disruption was assessed at 6, 24 and 48 h and subsequently at 3, 5 and 7 days. At the same time, the mRNA and protein expression of PAR­1, MMP­9 and AQP4 were also determined. It was identified that brain water content and BBB disruption increased at 6 h and reached a maximal level at 24 h in the normothermic group. The mRNA and protein expression levels of PAR­1, MMP­9 and AQP4 started to increase at 24 h and reached a maximal level at 48 h. Focal mild hypothermia tended to significantly reduce brain water content, BBB disruption and PAR­1, MMP­9 and AQP expression at 24 and 48 h. The present data suggest that focal mild hypothermia is an effective treatment for edema formation through moderation of the mRNA and protein expression of PAR­1, MMP­9 and AQP4.

[Inhibit affection of resveratrol on the growth of Hep-2 cell line].

OBJECTIVE: To study the inhibitory effect of resveratrol on growth of human laryngeal cancer cell line, Hep-2. METHOD: Count cell number under microscope, MTT assay was used to determine the cell growth inhibitory rate. Soft agar colony forming experiment was performed to observe the proliferation ability, before or after resveratrol treatment. RESULT: Resveratrol was able to depress cell growth and inhibit cell proliferation. CONCLUSION: Resveratrol strongly inhibit Hep-2 cell proliferation in a time- and dose-dependent manner.