Abstract
The quadriceps angle (Q angle), formed between the quadriceps muscles and the patella tendon, is considered clinically as a very important parameter which displays the biomechanical effect of the quadriceps muscle on the knee, and it is also regarded a crucial factor for the proper posture and movement of the knee patella. The Q angle is routinely and regularly used as an assessment parameter during the diagnosis of many knee-related problems, including the anterior knee pain, osteoarthritis, and degenerative knee disorders. This study had been conducted so as to measure the normal Q angle values range in the Arab nationalities and determine the correlation between Q angle values and several body parameters, including gender, height, weight, dominant side, and the condylar distance of the femur. The study includes 500 healthy young Arab students from the Yarmouk University and Jordan University of Science and Technology. The Q angle of those volunteers was measured using a universal manual Goniometer with the subjects in the upright weight-bearing position. It was found that Q angle was greater in young women than young men. Also, the analysis of the data revealed an insignificant increase in the dominant side of the Q angle. In addition, the Q angle was significantly higher in the taller people of both sexes. However, the Q angle did not present any considerable correlation with weight in the study population; conversely, it was clearly observed that there was a link with the condylar distance of the femur in both sexes. It was also noticed that the Q angle increased remarkably when there was an increase in the condylar distance. Consequently, it turned out that the gender, height, and the condylar distance were momentous factors that had impact on the Q angle in our study samples. However, weight and dominancy factors did not show to have any influence on the values in our study.
Highlights
The Q angle, which is known as quadriceps angle, is defined as the angle formed between the quadriceps muscles and the patella tendon
It was found that a considerable (P
The Q angle (The quadriceps femoris angle) is one of the most clinically used parameter in evaluating the quadriceps forces and factors acting on the patellofemoral joint which is considered to be as an indicator for sports performance as well as in the diagnosis of several patellofemoral painful disorders and diseases
Summary
The Q angle, which is known as quadriceps angle, is defined as the angle formed between the quadriceps muscles and the patella tendon. Q angle has become accepted as an important factor in assessing knee joint function and determining knee health in individuals suffering from an anterior knee pain [2,3,4]. When it is assessed correctly, it will supply very useful information concerning the alignment of the pelvis, leg, and foot [5,6,7]. It is essential to measure the angle of female patients who walk for health purposes, climb stairs frequently, or participate in a regular form of sports [5,9]
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