Association of quadriceps angle with plantar pressure distribution, navicular height and calcaneo-tibial angle

Abstract

Objective The aim of study was to analyze the association between Quadriceps Angle (QA) and plantar pressure, navicular height (NH), and calcaneo-tibial angle (CTA). Methods A total of 64 volunteers (mean age: 22.25 ± 2.54 (range:19–33)) participated in this cross sectional study. EMED-m (Novel GmbH, Germany) electronic pedobarograph was employed for dynamic plantar pressure measurement using two step protocol. The angle between the vertical axis of calcaneus and the long axis of Achilles tendon for CTA. The height of navicular tubercle from the ground was measured while the subject was standing on both feet for NH. QA was measured while the subject was standing in a relaxed posture where both feet bearing equal weight. Results There were significant negative correlations between QA and maximum force (MxF) under the 4th. metatarsal head (MH4). The QA was also significantly correlated with MxF and force-time integral (FTI) under the bigtoe (BT). FTI under the 3rd. metatarsal head (MH3), MH4 and 5th. metatarsal head (MH5) were significantly negatively correlated with QA. Pressure-time integral (PTI) under the MH4 and MH5 were found to be significantly negatively correlated with QA. A significant correlation was also found between QA and NH (p < 0.0001), whilst there was no correlation between QA and CTA. Regression analysis showed that NH was appeared as the major contributor for the QA (β = −0.49, p < 0.001) in the dynamic condition, followed by BT-FTI (β = 0.37, p < 0.001) and MH5-MxF (β = −0.21, p < 0.037). Conclusion These findings may imply that the NH which can at least be controlled by appropriate shoe inserts may affect QA. This way, loading pattern of both plantar region and whole lower extremity may be altered. Level of evidence Level III, Diagnostic Study.

Multivariate Analysis of Associations between Patellofemoral Instability and Gluteal Muscle Contracture: A Radiological Analysis

“…Q-angle is the most common and simple assessment indicator for the clinical assessment of patellofemoral instability and patellar subluxation [10,24]. In previous studies, we found that arthroscopic GMC release could significantly reduce the Q-angle of GMC patients, thereby improving patellofemoral instability [7].…”

“…Q-angle represents the supplementary angle of the angle between the line connecting the anterior superior iliac spine and the midpoint of the patella and the line connecting the tibial tubercle and the midpoint of the patella [10] (Figure 1(D2)). GMC patients are usually unable to squat down while closing their knees together, and a certain distance between the feet was required for the patient to squat down completely.…”

Prevalence, frontal plane knee alignment, and lower limb joint pain and injury in generalized joint hypermobility in Thai physical therapy students

“…Multiple factors have been found to influence the magnitude of the QA measurement. Mainly, the state of the quadriceps muscle contraction [ 33 ] and anatomical characteristics [ 21 , 34 , 35 ] can influence the magnitude of the QA. As all lower limb alignments were measured in a standing position, the participants were encouraged to stand with their weight equally distributed between legs.…”

2-8 Yaş Arası Çocuklarda Kuadriseps Açısının Değerlendirilmesi

“…Another factor influencing the Q angle is deformities observed in the ankle ( 15 ). Elvan et al ( 35 ) reported that the foot tended to pronate and the amount of load carried in the medial side increased with an increase in the Q angle, whereas a decrease in the Q angle caused supination in the foot and greater load in the lateral side. In addition, they reported that the most important marker influencing the Q angle was navicular height.…”