جستجوی مقالات مرتبط با کلیدواژه « حس وضعیت مفصل زانو » در نشریات گروه « پزشکی »

The rate of anterior cruciate ligament (ACL) tearing is more common in female athletes and one of thereasons is the effect of sex hormones. It was illustrated that knee joint position sense (JPS) isaltered across the menstrual cycle and its lowest level is at menses. Therefore، it’s important to find a method to reduce injury risk at menses. Thus، the purpose of this study was to evaluate the effect of taping as a stimulator of skin، on the knee JPS in healthy female athletes across the menstrual cycle with different levels of estrogen and progesterone. In this semi-experimental study، 16 healthy female athletes with regular menstrual cycle voluntarily participated. Knee JPS was measured at 3 menstrual cycle phases، before and after patellataping. JPS was evaluated by reproduction of the target angle (30° flexion) in standing position، from full extension. Serum estrogen and progesterone levels were collected in these 3 phases. Knee angles were measured by using a system comprised of skin markers، digital photography، and autoCAD software. Absolute error was considered as a dependent variable. There was a significant difference between the knee JPS in 3 phases of measurement before taping (P=0. 025)، while no significant difference was found between knee JPS in 3 phases after taping (P=0. 965). Findings of this study suggest that healthy female athletes have different levels of knee JPS across a menstrual cycle and its accuracy decreasesat menses. This differencecan be reduced by skin stimulatingmethods، such as taping. Therefore، kinesio taping would improve the knee JPSdeficiency at menses.

Tearing of anterior cruciate ligament (ACL) is the most common lower extremity injuries in female athlete. In past studies, the relationship between ACL injuries and levels of sex hormones, as well as the relationship of ACL injuries with neuromuscular system has been proved, but the relationship between neuromuscular control and levels of sex hormones has been less considered. Thus, the aim of this study was to find out any possible such relationship by measuring joint position sense (JPS) of the knee in healthy female athletes across the menstrual cycle. In this quasi-experimental study, 16 healthy female athletes participated voluntarily. Knee JPS was evaluated by reproduction of the target angle, in weight-bearing position at 3 menstrual phases. In each phase, levels of estrogen and progesterone also measured. Knee angles were determined using a system consisting of skin marking, digital photography and software AutoCAD. The absolute angular error was considered as dependent variable. There was a significant differences between JPS of the knee in 3 phases of menstrual phases (P=0.025), and this difference was more prominent between 1st and 3rd phases (P=0.003). Findings of this study suggests that accuracy of joint position sense of the knee differs in healthy women athletes across menstrual cycle and the lowest accuracy was found in menstrual phase, when sex hormones are at a minimum concentration.

Weight bearing position is considered as a functional condition. However, available data about it and also knee position sense is little. This study aimed to compare knee joint position sense in weight bearing and non weight bearing positions in men and women, and to determine the effect of target angle on knee joint position sense. This interventional study was performed in Zahedan University of medical sciences, Zahedan, Iran in 2006. Forty-four healthy subjects (22 women, 22 men) participated in this study through simple non-probability sampling. Subjects were asked to flex their knees in prone or in standing position, while their eyes closed. Three target angles (45, 60, 90 degrees of knee flexion) were reproduced by each subject. Angle matching errors were measured using an electrogoniometer. Outcomes were collected in form of relative, absolute and variable errors. Data were analyzed using MANOVA test. There was significant difference between weight bearing and non weight bearing positions in terms of angle matching error (P<0.05), while no significant difference was seen between women and men, and also in three target positions. This study showed that subjects are more capable of recognition and identification of the angles during weight bearing position. A larger amount of proprioceptive afferent data may result from sources other than examined knee and lower extremity.