Joint Axes Research Articles

Preoperative foot and ankle radiographic evaluation for total knee arthroplasty

PurposeTo radiographically evaluate the ankle and foot complications in preoperative patients for total knee arthroplasty (TKA) in Japan. MethodsThis study included 500 legs of 500 patients who planned to undergo primary TKA in affiliated hospitals of our university from August 2020 to November 2021. Hip to calcaneus view, anterior view of the ankle joint, and anterior and lateral views of the foot were taken within 1 month preoperatively. We measured hip-knee-ankle angle (HKA), mechanical ankle joint axis point (MAJAP), lateral distal tibial angle (LDTA), tibio-plafound inclination (TPI), talar inclination (TI), ankle joint line convergence angle (A-JLCA), talo-first metatarsal angle (TMA), calcaneal pitch angle (CPA), hallux valgus angle (HVA), first-second intermetatarsal angle (M1M2A), first fifth intermetatarsal angle (M1M5A), talonavicular coverage angle (TNCA), and percentage of Takakura Tanaka classification. ResultsMean measured values were as follows: HKA: 11.0°; MAJAP, 39.6%; LDTA: 92.2°; TPI: 6.9°; TI: 7.2°; A-JLCA: 0.3°; TMA:−4.3° (<−4° in 247 feet, 49.4%); CPA: 15.9°(<20° in 366 feet, 73.2%); HVA: 16.8° (mild in 70 feet, 14.0%; moderate in 42 feet, 8.4%; severe in 23 feet, 4.6%); M1M2A: 11.1°(>9° in 373 feet, 74.6%); M1M5A: 31.1°(≥30° in 321 feet, 64.2%); TNCA: 10.6° (≥7° in 375 feet, 75.0%); Takakura Tanaka classification Stage ​≥ ​IIIa in 108 feet, 21.6%. ConclusionsMild-to-severe hallux valgus was noted in 26.5% of patients and Stage IIIa or higher ankle osteoarthritis in 21.6%, and abnormal alignment—including flat feet—was indicated in some patients. Patient's knee, foot, and ankle symptoms should be considered before TKA.

Coronal and sagittal alignment of ankle joint is significantly affected by high tibial osteotomy.

Changes in coronal and sagittal alignment of the knee joint after HTO have been reported in several previous studies. However, only few of them investigated the changes only on coronal alignment of the ankle joint. The purpose of this study was to investigate changes in both coronal and sagittal alignment of the ankle joint after HTO. 46 patients (49 cases) who underwent HTO were retrospectively analyzed. Preoperative and postoperative lower extremity scanogram and EOS imaging system were investigated. The hip-knee-ankle (HKA) angle, medial proximal tibial angle (MPTA), and knee tibia plafond angle (KTPA) were measured by scanogram to evaluate coronal alignment of the knee. Tibial anterior surface angle (TAS), talar tilt (TT), tibial plafond inclination (TPI), and ankle joint axis point on the weight-bearing-line (AAWBL) ratio were measured by scanogram to investigate coronal alignment of the ankle. Knee lateral ankle surface angle (KLAS) and tibial lateral surface angle (TLS) were measured by EOS to evaluate sagittal alignment of the ankle. Varus alignment of the knee was corrected by significant change of the HKA angle (5.8 ± 3.1° vs. -2.1 ± 2.8°, p < 0.001), MPTA (85.7 ± 2.9° vs. 91.7 ± 3.3°, p < 0.001), and KTPA (5.0 ± 3.5° vs. -2.1 ± 4.2°, p < 0.001) after HTO. Regarding the ankle coronal alignment, there was significant change in TPI (3.9 ± 3.4° vs. -0.9 ± 3.8°, p < 0.001) and AAWBL ratio (45.5 ± 14.7% vs. 61.6 ± 13.3%, p < 0.001). In sagittal alignment of the ankle, KLAS (4.5 ± 3.1° vs. 7.7 ± 3.7°, p < 0.001) significantly increased. Among the variables, the amount of correction in AAWBL ratio (R = 0.608, p < 0.01) showed strongest relationship with tibial correction angle. Based on the present study, coronal and sagittal alignment of ankle joint was significantly affected by HTO. After HTO, AAWBL ratio increased due to lateralization of the ankle joint axis, and KLAS increased due to increased posterior tibial slope. III.

Actuated Thumb Exoskeleton with Variable Axes of Rotation For Stroke Rehabilitation

Chronic hand impairment is very common amongst stroke survivors. More specifically, movement of the thumb is highly restricted causing a major decrease in the functionality of the entire hand. The non-orthogonal, non-intersecting joint axes of the thumb and the many actuating muscles involved make it very difficult to understand the thumb, let alone provide techniques for rehabilitation. Thus, an exoskeleton that incorporatesthe 5 anatomical Degrees of Freedom (DOF) of the thumb, both for actuation and measuring, was created in order to better understand motor control of the thumb, both in neurologically intact individuals and in stroke survivors. A mounting bracket was developed to affix the exoskeleton to a forearm brace. The exoskeleton was then tested to determine if it restricted movement. The movement space of the thumb was tracked both withthe thumb connected to the exoskeleton and for the free thumb using a Digital Motion Analysis System (DMAS). Neurologically intact subjects were able to cover an average of 72% of their normal thumb working space while wearing the exoskeleton. Most of the restriction occurred in the upper region of the workspace. Thus, the device seems to allow considerable freedom of movement of the thumb, particularly in the region of the workspace used for everyday tasks. Subjects remarked that thumb movement felt quite natural. Further research using this exoskeleton can be done to better understand the impairments that occur in the thumb and thus provide better insight into rehabilitation methods. For example, the use of a system including motors and flexible shafts to drive the joints of the exoskeleton which in turn drives the joints of the thumb might provide a successful mode of rehabilitation.

Human–Robot Attachment System for Exoskeletons: Design and Performance Analysis

Exoskeleton robots found application in neurorehabilitation, telemanipulation, and power augmentation. The human–robot attachment system of an exoskeleton should transmit all the interaction forces while keeping the anatomical and robotic joint axes aligned. Existing attachment concepts were bounding the performance of modern exoskeletons due to insufficient stiffness for high-performance force control, time-consuming adaption processes, and/or bulkiness. Therefore, we developed an augmented attachment system for a recent fully actuated nine-degree-of-freedom upper limb exoskeleton. The proposed system was compared to a conventional solution in a case study with four participants. The proposed attachment system lowered the relative motion between the human and the robot under static loads for all defined landmarks by 45% on average. The occurrence of undesired contacts in the trials was mitigated by 74%, thus improving conditions for closed-loop force control. Furthermore, the proposed system adapted better to the user's anatomy facilitating more accurate alignment and less obstruction. On average, self-attachment took <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\mathbf {43(8.3)}$</tex-math></inline-formula> <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\mathrm{s}$</tex-math></inline-formula> to don(doff). Thereby, the alignment of anatomic landmarks had typically less than 15 mm offset to a thorough expert alignment, making self-attachment eligible. The augmented attachment system and the insights gained by the case study are expected to enable improvement of the physical human–robot interaction of exoskeletons.

Kinematic and Kinetic Assessment of a Novel Polycentric Knee Joint for Powered Walking Assist Exoskeletons

Loss of mobility and independence directly affects the quality of life of many vulnerable individuals. In order to address this, researchers have been developing wearable walking assist exoskeletons to aid users with their daily activities. While this technology has advanced tremendously in the past decade, current exoskeletons are yet to be ergonomic, causing discomfort and injuries to the user, leading to early device rejection. This research intends to assess the kinematic and kinetic compatibility of a novel knee joint suitable for exoskeletons. The proposed knee design can be adapted to accommodate a kinematic offset and optimize force delivery. This is achieved by ensuring that the mechanical and biological joint rotation axes are aligned and that the moment arm can be varied to mimic the mechanical characteristics of a biological knee. Model simulations and mechanical testing of fabricated prototypes were achieved to analyze and validate the design. Results confirmed the compatibility of the design, which demonstrated kinematic absolute error values of 1.68 and 0.32 mm for the offset and aligned joints, respectively. It was shown that the moment arm can be varied throughout flexion, allowing future iterations to achieve optimal and effective moment transfer.

Design, Dimensional Synthesis and Evaluation of a Novel Two-Degrees-of-Freedom Spherical Remote Center of Motion Mechanism for Minimally Invasive Surgery

Abstract With the development of minimally invasive surgery (MIS) technology, higher requirements are put forward for the performance of remote center of motion (RCM) manipulator. This paper presents the conceptual design of a novel two-degrees-of-freedom (2-DOF) spherical RCM mechanism, whose axes of all revote joints share the same RCM. Compared with the existing design, the proposed mechanism indicates a compact design and high structure stability, and the same scissor-like linkage makes it easy to realize modular design. It also has the advantages of singularity-free and motion decoupling in its workspace, which simplifies the implementation and control of the manipulator. In addition, compared with the traditional spherical scissor linkage mechanism, the proposed mechanism adds a rotation constraint on the output shaft to provide better operating performance. In this paper, the kinematics and singularities of different cases are deduced and compared, and the kinematic model of the best case is established. According to the workspace and constraints in MIS, the optimal structural parameters of the mechanism are determined by dimensional synthesis with the goal of optimal global operation performance. Furthermore, a prototype is assembled to verify the performance of the proposed mechanism. The experimental results show that the two-degrees-of-freedom prototype can provide a reliable RCM point. The compact design makes the manipulator have potential application prospects in MIS.

Use of the Ball-Cratering Method to Assess the Wear Resistance of a Welded Joint of XAR400 Steel.

Wear-resistant steels are designed to allow for operation under extreme loading conditions. They combine large strength with resilience and resistance to abrasive wear. In stock, the steel is subjected to preliminary heat treatment. However, any further processing at temperatures higher than 200 °C results in tempering that influences the mechanical properties of the material. The presented paper aims to study changes in abrasive wear properties across the welded joint made out of this steel, and its prime novelty lies in using the ball-cratering method to test the wear resistance of the joints. To distinguish between different crystalline structures in the weld, metallographic and XRD analyses were performed that resulted in the determination of five primary zones for which wear tests were carried out. Abrasive wear rates, studied across the welded joint, indicate that the material in the HAZ has the lowest resistance to abrasive wear. Similarly, the obtained values of the wear index show decreasing resistance of the material approaching the joint axis.

Human Joint Axis Estimation Algorithm Using a Single Sensor to Recognize the Intention of the Wearer of a Wearable Robot

Wearable robots have been developed to aid or substitute human gait locomotion. To assist gait locomotion based on the intention of the wearer, gait pattern analysis is required with a wearable sensor that measures body information, such as the joint angular velocity. However, it is difficult to measure the joint angular velocity precisely because of the attachment position of a sensor that has a curvature and an anatomical human joint axis that is invisible. Therefore, a sensor calibration algorithm that aligns the sensor axis with an anatomical human joint axis is required to provide appropriate assistance to the wearer. Hence, in this study, a new and simple sensor calibration algorithm that uses a single sensor to simplify the robot system and reduce its weight is proposed. The attachment position of the sensor may change because the wearer shakes the body or collides with the ground when walking. Thus, a continuous sensor-compensation algorithm is proposed to correct for the changes in the location of the sensor. The effectiveness of the proposed algorithm is demonstrated through gait locomotion experiments on various paths. In addition to the gait locomotion experiments, the proposed algorithm is applied to a real wearable robot system. An ankle-assist wearable robot experiment reveals that the proposed algorithm can enhance the sensing and recognition performance of the robot system.

A frame orientation optimisation method for consistent interpretation of kinematic signals

In clinical movement biomechanics, kinematic data are often depicted as waveforms (i.e. signals), characterising the motion of articulating joints. Clinically meaningful interpretations of the underlying joint kinematics, however, require an objective understanding of whether two different kinematic signals actually represent two different underlying physical movement patterns of the joint or not. Previously, the accuracy of IMU-based knee joint angles was assessed using a six-degrees-of-freedom joint simulator guided by fluoroscopy-based signals. Despite implementation of sensor-to-segment corrections, observed errors were clearly indicative of cross-talk, and thus inconsistent reference frame orientations. Here, we address these limitations by exploring how minimisation of dedicated cost functions can harmonise differences in frame orientations, ultimately facilitating consistent interpretation of articulating joint kinematic signals. In this study, we present and investigate a frame orientation optimisation method (FOOM) that aligns reference frames and corrects for cross-talk errors, hence yielding a consistent interpretation of the underlying movement patterns. By executing optimised rotational sequences, thus producing angular corrections around each axis, we enable a reproducible frame definition and hence an approach for reliable comparison of kinematic data. Using this approach, root-mean-square errors between the previously collected (1) IMU-based data using functional joint axes, and (2) simulated fluoroscopy-based data relying on geometrical axes were almost entirely eliminated from an initial range of 0.7°–5.1° to a mere 0.1°–0.8°. Our results confirm that different local segment frames can yield different kinematic patterns, despite following the same rotation convention, and that appropriate alignment of reference frame orientation can successfully enable consistent kinematic interpretation.

The effect of functional calibration methods on gait kinematics in adolescents with idiopathic rotational deformity of the femur

BackgroundDue to anatomical deviations, assumptions of the conventional calibration method for gait analysis may be violated in individuals with rotational deformities of the femur. Functional calibration methods were compared with conventional methods in this group for 1) localization of the hip joint center and orientation of the knee axis, and 2) gait kinematics. MethodsTwenty-four adolescents with idiopathic rotational deformity of the femur underwent gait analysis and a CT scan. During standing, distance between hip joint centers and knee axis orientation were compared between calibration methods, with CT serving as reference for hip joint center estimation. Gait kinematics were compared using statistical parametric mapping. FindingsThe conventional calibration method estimated the hip joint center closer to the CT reference (4±12 mm more lateral) than the functional calibration method (26 ± 20 mm more lateral). Orientation of the knee joint axis was 2.6° less internal in the functional calibration method. During gait, statistical parametric mapping revealed significantly more hip flexion, less external hip rotation during the swing phase, less knee varus-valgus motion, and larger knee flexion angles when applying the functional method. InterpretationFunctional calibration methods were less accurate in determining the hip joint center location than the conventional calibration method and resulted in a knee joint axis that was less internally rotated. Importantly, there was less knee joint angle crosstalk during gait when using the functional method. Although differences between methods on gait kinematics were within clinically acceptable limits for the sagittal plane, relatively larger differences on transversal hip kinematics may hold clinical importance.

Quaternionic phase and axis/colour retrieval

We demonstrate a quaternion-based phase and axis retrieval algorithm and a quaternionic realization of the Gerchberg–Saxton method, particularly suitable for RGB images. The RGB image is represented here as quaternion-valued image in polar form with the components quaternionic magnitude, axis and phase. We discuss their importance and relations in spatial and Fourier domain. We illustrate three versions of retrieval: the quaternionic phase only, the axis only and the joint phase and axis retrieval algorithm derived from the classical Gerchberg–Saxton algorithm. We discuss how the retrieval results are influenced by the choice of the Fourier axis of the quaternionic Fourier transform. Finally, we show that by including more constraints and prior knowledge, respectively, the retrieval can be improved.

Inverse solution of six-degrees-of-freedom serial robot with adjacent three joint axes parallel based on screw theory

Inverse kinematics occupies a vital role in robotics and is the fundation of robot trajectory planning as well as rigid body motion, which directly affects the rapidity and accuracy of control. Compared with the traditional Denavit-Hatenberg parameter modeling, the screw method has its unique advantages. The paper establishes the kinematic model of a six-degree-of-freedom serial robot using screw theory. The Paden-Kahan sub-problem, orientation separation reduction technique and matrix transformation are used to resolve the inverse kinematics. The effectiveness and validity of the above algorithm are verified by data calculation. A new inverse solution algorithm is designed in this paper to propose an idea for the inverse kinematic solution with the second, third, and fourth joints being parallel to each other in the robot.

Can a Musculoskeletal Model Adapted to Knee Implant Geometry Improve Prediction of 3D Contact Forces and Moments?

Tibiofemoral contact loads are crucial parameters in the onset and progression of osteoarthrosis. While contact loads are frequently estimated from musculoskeletal models, their customization is often limited to scaling musculoskeletal geometry or adapting muscle lines. Moreover, studies have usually focused on superior-inferior contact force without investigating three-dimensional contact loads. Using experimental data from six patients with instrumented total knee arthroplasty (TKA), this study customized a lower limb musculoskeletal model to consider the positioning and the geometry of the implant at knee level. Static optimization was performed to estimate tibiofemoral contact forces and contact moments as well as musculotendinous forces. Predictions from both a generic and a customized model were compared to the instrumented implant measurements. Both models accurately predict superior-inferior (SI) force and abduction-adduction (AA) moment. Notably, the customization improves prediction of medial-lateral (ML) force and flexion-extension (FE) moments. However, there is subject-dependent variability in the prediction of anterior-posterior (AP) force. The customized models presented here predict loads on all joint axes and in most cases improve prediction. Unexpectedly, this improvement was more limited for patients with more rotated implants, suggesting a need for further model adaptations such as muscle wrapping or redefinition of hip and ankle joint centers and axes.

Are we overestimating internal rotation gait by conventional modelling?

BackgroundThe determination of the knee joint axis (KJA) via specific calibration movements has become a promising alternative to the conventional approach to determine this axis based on regression equations or directly via marker placement on bony landmarks of the knee. Since the orientation of the KJA may differ between methods, it has direct influence on hip rotation and may therefore influence clinical decision making in context of transverse plane gait deviations.Research question: Does a functional KJA calibration lead to clinically relevant differences in hip rotation estimates during gait compared to the conventional method? Methods95 subjects (age: 19.9 years; BMI: 21.1 kg/m2), including 71 patients with potential rotation malalignment, were prospectively examined and underwent 3D gait analysis. For the conventional approach the KJA was determined by applying a knee alignment device, for the functional approach subjects were asked to perform two different calibration movements. Each procedure was performed twice. Mean hip rotation in stance (mHipRotSt) was determined following the conventional and the functional KJA calibration. ResultsDeming regression analysis for the comparison of conventional and functionally measured hip rotation revealed a systematic and substantial difference between methods (slope: 0.63; intercept: 0.31°). Measurement repetition with the knee alignment device revealed typical errors around 5°, whereas the functional methods lead to profoundly smaller errors around 1-2° with slightly inferior results for SQUAT compared to FLEX. However, when compared to conventional frontal plane video-taping, the conventional method seemed to reflect the more consistent results. SignificanceThe systematic linear discrepancy in mHipRotSt obtained by a functional approach as compared to the conventional approach appears critical since patients with severe internal or external rotation gait may be misjudged in function when receiving corrective procedures such as femoral derotation osteotomy.

보행 보조 로봇의 보행 시점 판별 성능 향상을 위한 자이로 센서 신호 처리 기법

Wearable robots have been developed to aid or substitute the gait locomotion of humans. To assist gait locomotion based on the intention of a wearer, a gait pattern analysis is required with a wearable sensor by measuring body information, i.e., a joint angular velocity. However, measuring a precise joint angular velocity is difficult because the attachment position of a sensor has a curvature and an anatomical joint axis which is invisible. Therefore, a sensor calibration algorithm, which aligns a sensor axis into an anatomical joint axis, is required to provide an apposite assist for a wearer. Hence, in this paper, a new and simple sensor calibration algorithm is proposed with a one sensor which contributes to simplifying and lightening the robot system. Since a wearer shakes the body or collides with the ground when walking, the attachment position of a sensor may be changed. Thus, a continuous sensor compensation algorithm is also proposed. The effectiveness of this new algorithm is demonstrated by gait locomotion experiments on various paths.

거골하 관절 축 균형운동 재활프로그램이 아킬레스건염 엘리트 운동선수의 발목 동적 안정성과 근 기능에 미치는 효과

The purpose of this study was to evaluate the visual analog scale (VAS), dynamic stability of the ankle joint, and isokinetic by applying SJABE to elite player with Achilles tendinitis. The purpose was to investigate the effect on muscle s trength. The s ubj ects o f this s tudy were 22 a thletes diagnosed with Achilles tendinitis and performed SJABE (n=11) and general balance exercise (GBE) (n=11) 3 times a week, 60 minutes each for 6 weeks. For the data of this study, the mean and standard deviation were calculated using the IBM SPSS 22.0 statistical program, and the effect of the subtalar joint axis balance exercise was performed by two-way repeated measures ANOVA. Paired t-test and verification of differences between groups were performed by independent t-test. In addition, the significance level for all statistical processing was set below α=0.05. Results of the study, SJABE Achilles tendinitis VAS (G: p＜.005, T: p＜.000, G×T: p＜.000), ankle dynamic stability (T: p＜.000, G×T: p＜.008), plantar flexion strength 60°/sec (T: p＜.000, G×T: p＜.000), and dorsi flexion strength 60°/sec (T: p＜.000) were improved. As a result of comparing SJABE and GBE in athletes with Achilles tendinitis, pain scale, ankle joint dynamic stability, and isokinetic muscle strength reduced Achilles tendon pain and improved ankle stability and muscle strength in both groups. Through this study, SJABE was found to be effective in preventing and rehabilitating damage to the Achilles tendon and ankle joint, and it is expected that it will lead to a safe daily life and a quick return to the sports field.

Retrospective functional knee joint axis calibration with SARA does not improve the agreement between x-ray and frontal plane knee alignment in children and youth with Achondroplasia or idiopathic axial deformity

Retrospective functional knee joint axis calibration with SARA does not improve the agreement between x-ray and frontal plane knee alignment in children and youth with Achondroplasia or idiopathic axial deformity

A Kirigami-Inspired Metamorphic Double-Loop Linkage With Multiple Single-Degree-of-Freedom Reconfiguration Branches

Abstract Reconfigurable mechanisms attract increasing attention for the characteristic to change structure configurations and motion behaviors in various multifunctional systems. By drawing inspiration from a kirigami fold, this paper presents a metamorphic double-loop linkage with multiple single-degree-of-freedom (DOF) reconfiguration branches, which is generated through combining two reconfigurable 6R plane-symmetric linkages. Mobility analysis of the metamorphic linkage is carried out in terms of the screw-loop theory equation, as well as the induced reconfiguration position identification. Then, this paper presents the specific reconfiguration conditions for the two single-loop components in this linkage, and a physical prototype fabricated by 3D printing verifies the ability of configuration reconstruction. Sixteen types of evolved motion branches are constructed by implementing different reconfiguration constraints, respectively, and corresponding kinematic paths are described by employing the specific angle between axes of joints. Furthermore, these evolved motion branches of this metamorphic linkage provide novel examples of mobile assemblies among several fundamental single-loop linkages.

Serial Subtraction Alters Lateral Step-down Tibiofemoral Kinematics in Healthy Adults.

This study evaluated the effects of two types of cognitive dual-tasking on three-dimensional knee kinematics during the lateral step-down. 19 healthy individuals (22.05±1.61 yrs., 173.92±9.21 cm, 67.99±12.65 kg) participated in this study. Participants completed 5 repetitions of a lateral step-down task for each leg and each testing condition (control, Stroop, and serial subtraction by seven). An electromagnetic motion sensor was attached to the femur via compression clamp placed about the medial and lateral epicondyles. Another sensor was attached 2 cm below the ipsilateral tibial tuberosity. A custom MATLAB algorithm located the knee joint axis of rotation from dynamic knee flexion and extension. Discrete kinematics at peak flexion were used in this study. Paired samples t-tests were used to compare average frontal, transverse, and sagittal plane knee position at maximum flexion between conditions for each leg. No significant differences were found for either limb between control and Stroop conditions. Comparisons revealed significant differences in frontal and transverse plane knee angles at peak flexion between the control and serial subtraction by seven conditions. These findings indicate serial subtraction by seven requires different cognitive processing abilities which may cause greater interference with some aspects of motor control.

HALLUX VALGUS: ЛИЖЕТ ГОЛЕНОСТОПНЫЕ СУСТАВЫ И КУСАЕТ ТАЗОБЕДРЕННЫЕ?

Objective: To present the coverage in the literature of recent years of the problem of the influence of foot pathology (Hallux Valgus, HV) on the condition of the proximal and distal joints of the lower limb (LL) in a comparative aspect Methods: Literature searches were carried out in the Web of Science, PubMed and Scopus databases as of September 1, 2023 using the keywords “hallux valgus”, “bunion”, “hip joint”, “knee joint”, “ankle joint”. The inclusion criterion was the availability of full-text articles in English. Exclusion criteria included reviews, case reports, and abstracts. Results: Along with the previously described changes in the spatiotemporal parameters of gait, kinematics of the ankle joint (AJ) with HV, recently there have been studies regarding its influence on the kinematics of the proximal segment of the knee joint, including those contributing to the development of osteoarthritis (OA) of the knee joint (KJ). At the same time, disturbances in the kinematics of the hip joint (HJ) in HV, leading to the development of pathomorphological changes in it, remain unexplored. Conclusion: HV is a common disease of the musculoskeletal system, significantly worsening the quality of life of patients and often leading to disability. While the effect of HV on foot kinematics and the joint axis has been described in some detail, its effect on the hip joint remains poorly understood. Surgical treatment does not lead to a significant improvement in the kinematics of the lower limb and pelvis, but, on the contrary, can lead to its negative dynamics not only in the operated, but also in the contralateral LL, which dictates the need to conduct research to identify clinically significant kinematic parameters of gait and proximal joints of the LL for HV and optimization of existing treatment approaches. Keywords: Hallux valgus, hip joint, ankle joint, joint biomechanics, motion capture system.