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Variation in the forearm extensor muscle: case report
Reza Soltani, Fakhroddin Aghajanpour , Mohsen Norozian, Gholamreza Hasanzadeh, Hojjatallah Abbaszadeh, Fatemeh Fadaei,
Volume 79, Issue 1 (April 2021)
Abstract
Background: The Extensor Carpi Radialis Longus (ECRL) and the Extensor Carpi Radialis Brevis (ECRB) are muscles of the posterior forearm compartment. variations in this area of the forearm are common and are usually diagnosed during surgery. Sometimes these variations are symptomatic and can be helpful in clinical procedures such as surgery. Diagnosis and identification of abnormalities can be used in academic studies to evaluate limb function. Reporting such variations is important in clinical practice and will help treat limb dysfunction. In this report, we report two cases of ECRL and ECRB muscle tendon variations in the upper third of the forearm.
Case presentation: During routine dissection of the body of a 70-year-old man fixed in 10% formalin in the Department of Biology and Anatomy, Shahid Beheshti University of Medical Sciences, Tehran, two cases of ECRL and ECRB muscle tendon variations were observed in the upper third of the left forearm. The fascia of the ECRL and ECRB muscles were separated, and following the ECRL muscle from the external epicondyle of the humerus to the outer third of the forearm, we observed that the tendon of this muscle was divided into two branches. We also observed that the ECRB muscle tendon split into two branches slightly below its origin. The branch had moved obliquely toward the lower end of the radius. at the lower end of the forearm, this tendon was connected to the ECRL muscle tendon by passing over the sub-branch of the ECRL muscle tendon and the depth of the retinaculum extensor. The submandibular tendon was attached to the base of the second Metacarpal bone along with the ECRL muscle tendon. The main branch of this muscle also had its main path to the lower end of the forearm. The lower end of the forearm was connected to the dorsal base of the second and third metacarpals by passing under the retinaculum extensor.
Conclusion: Knowing these variations can help radiologists and surgeons in diagnosis and treatment.

The effect of 5 weeks of high-intensity interval training on the serum levels of resistin and adiponectin in Wistar rats with nonalcoholic fatty liver
Fazael Fadaei, Zeinab Ardin, Sadegh Amani-Shalamzari , Hossein Shirvani,
Volume 79, Issue 3 (june 2021)
Abstract
Background: The goal of the study was to investigate the effect of 5 weeks of high-intensity interval training (HIIT) on the levels of resistin and adiponectin and liver enzymes in Wistar rats with non-alcoholic fatty liver.
Methods: To do this basic research, 24 Wistar male rats were purchased and transferred to Baqiyatallah University then, they were allocated randomly into three groups: Control group (CG, n=8), induced fatty liver diseases group (FG, n=8), and induced fatty liver diseases+exercise group (FEG, n=10). The present study was conducted in July and August of 2019. To induce fatty liver disease, 140 mg per kg of bodyweight oral tetracycline drug was administered to rats by gavage for seven days. Fatty liver (steatosis) was confirmed by measuring liver enzymes. The training group performed HIIT for five weeks and five days per week. First, the maximum aerobic test (MAT) was performed, and based on data of this test; the HIIT protocol was conducted as 5×2 min-intervals with (50-120% Mat) and with 1 min recovery (30-50% MAT). Blood and tissue sampling were taken 48 hours after the last training session. Blood samples were centrifuged at 4000 rpm for 10 minutes, and serum samples were frozen at -20 degrees. One-way ANOVA and Tukey post hoc test were used to analyze data.
Results: Following performing HIIT, serum levels of adiponectin and resistin in the FEG compared to FG increased and decreased significantly, respectively (P=0.001). In addition, the FEG experienced a significant decrease in serum levels of AST and ALT enzymes. The aerobic capacity of the rats in the HIIT group increased significantly compared to the other two groups.
Conclusion: By modulating body fat levels and the secretion of adipokines such as adiponectin and resistin, HIIT was involved in improving the condition of rats with non-alcoholic fatty liver disease.

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