Biomechanical Phenomena: The properties, processes, and behavior of biological systems under the action of mechanical forces.Knee Joint: A synovial hinge connection formed between the bones of the FEMUR; TIBIA; and PATELLA.Knee: A region of the lower extremity immediately surrounding and including the KNEE JOINT.Osteoarthritis, Knee: Noninflammatory degenerative disease of the knee joint consisting of three large categories: conditions that block normal synchronous movement, conditions that produce abnormal pathways of motion, and conditions that cause stress concentration resulting in changes to articular cartilage. (Crenshaw, Campbell's Operative Orthopaedics, 8th ed, p2019)Arthroplasty, Replacement, Knee: Replacement of the knee joint.Knee Prosthesis: Replacement for a knee joint.Knee Injuries: Injuries to the knee or the knee joint.Range of Motion, Articular: The distance and direction to which a bone joint can be extended. Range of motion is a function of the condition of the joints, muscles, and connective tissues involved. Joint flexibility can be improved through appropriate MUSCLE STRETCHING EXERCISES.Knee Dislocation: Slippage of the FEMUR off the TIBIA.Tibia: The second longest bone of the skeleton. It is located on the medial side of the lower leg, articulating with the FIBULA laterally, the TALUS distally, and the FEMUR proximally.Patella: The flat, triangular bone situated at the anterior part of the KNEE.Anterior Cruciate Ligament: A strong ligament of the knee that originates from the posteromedial portion of the lateral condyle of the femur, passes anteriorly and inferiorly between the condyles, and attaches to the depression in front of the intercondylar eminence of the tibia.Menisci, Tibial: The interarticular fibrocartilages of the superior surface of the tibia.Medial Collateral Ligament, Knee: The ligament that travels from the medial epicondyle of the FEMUR to the medial margin and medial surface of the TIBIA. The medial meniscus is attached to its deep surface.Arthralgia: Pain in the joint.Cartilage, Articular: A protective layer of firm, flexible cartilage over the articulating ends of bones. It provides a smooth surface for joint movement, protecting the ends of long bones from wear at points of contact.Weight-Bearing: The physical state of supporting an applied load. This often refers to the weight-bearing bones or joints that support the body's weight, especially those in the spine, hip, knee, and foot.Reproducibility of Results: The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.Joint Instability: Lack of stability of a joint or joint prosthesis. Factors involved are intra-articular disease and integrity of extra-articular structures such as joint capsule, ligaments, and muscles.Gait: Manner or style of walking.Arthroscopy: Endoscopic examination, therapy and surgery of the joint.Osteoarthritis: A progressive, degenerative joint disease, the most common form of arthritis, especially in older persons. The disease is thought to result not from the aging process but from biochemical changes and biomechanical stresses affecting articular cartilage. In the foreign literature it is often called osteoarthrosis deformans.Bone Malalignment: Displacement of bones out of line in relation to joints. It may be congenital or traumatic in origin.Observer Variation: The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).Pain Measurement: Scales, questionnaires, tests, and other methods used to assess pain severity and duration in patients or experimental animals to aid in diagnosis, therapy, and physiological studies.Posterior Cruciate Ligament: A strong ligament of the knee that originates from the anterolateral surface of the medial condyle of the femur, passes posteriorly and inferiorly between the condyles, and attaches to the posterior intercondylar area of the tibia.Pain: An unpleasant sensation induced by noxious stimuli which are detected by NERVE ENDINGS of NOCICEPTIVE NEURONS.Quadriceps Muscle: The quadriceps femoris. A collective name of the four-headed skeletal muscle of the thigh, comprised of the rectus femoris, vastus intermedius, vastus lateralis, and vastus medialis.Ligaments, Articular: Fibrous cords of CONNECTIVE TISSUE that attach bones to each other and hold together the many types of joints in the body. Articular ligaments are strong, elastic, and allow movement in only specific directions, depending on the individual joint.Genetic Variation: Genotypic differences observed among individuals in a population.Treatment Outcome: Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.Heart Rate: The number of times the HEART VENTRICLES contract per unit of time, usually per minute.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Orthopedics: A surgical specialty which utilizes medical, surgical, and physical methods to treat and correct deformities, diseases, and injuries to the skeletal system, its articulations, and associated structures.Orthopedic Procedures: Procedures used to treat and correct deformities, diseases, and injuries to the MUSCULOSKELETAL SYSTEM, its articulations, and associated structures.Image Processing, Computer-Assisted: A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.Tomography, X-Ray Computed: Tomography using x-ray transmission and a computer algorithm to reconstruct the image.Traumatology: The medical specialty which deals with WOUNDS and INJURIES as well as resulting disability and disorders from physical traumas.Diagnostic Imaging: Any visual display of structural or functional patterns of organs or tissues for diagnostic evaluation. It includes measuring physiologic and metabolic responses to physical and chemical stimuli, as well as ultramicroscopy.Image Interpretation, Computer-Assisted: Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.Peer Group: Group composed of associates of same species, approximately the same age, and usually of similar rank or social status.Video Games: A form of interactive entertainment in which the player controls electronically generated images that appear on a video display screen. This includes video games played in the home on special machines or home computers, and those played in arcades.Videotape Recording: Recording of visual and sometimes sound signals on magnetic tape.Periodicals as Topic: A publication issued at stated, more or less regular, intervals.Journal Impact Factor: A quantitative measure of the frequency on average with which articles in a journal have been cited in a given period of time.Peer Review, Research: The evaluation by experts of the quality and pertinence of research or research proposals of other experts in the same field. Peer review is used by editors in deciding which submissions warrant publication, by granting agencies to determine which proposals should be funded, and by academic institutions in tenure decisions.Peer Review: An organized procedure carried out by a select committee of professionals in evaluating the performance of other professionals in meeting the standards of their specialty. Review by peers is used by editors in the evaluation of articles and other papers submitted for publication. Peer review is used also in the evaluation of grant applications. It is applied also in evaluating the quality of health care provided to patients.Golf: A game whose object is to sink a ball into each of 9 or 18 successive holes on a golf course using as few strokes as possible.GreeceCongresses as Topic: Conferences, conventions or formal meetings usually attended by delegates representing a special field of interest.Pharmacopoeias as Topic: Authoritative treatises on drugs and preparations, their description, formulation, analytic composition, physical constants, main chemical properties used in identification, standards for strength, purity, and dosage, chemical tests for determining identity and purity, etc. They are usually published under governmental jurisdiction (e.g., USP, the United States Pharmacopoeia; BP, British Pharmacopoeia; P. Helv., the Swiss Pharmacopoeia). They differ from FORMULARIES in that they are far more complete: formularies tend to be mere listings of formulas and prescriptions.International Cooperation: The interaction of persons or groups of persons representing various nations in the pursuit of a common goal or interest.United States Food and Drug Administration: An agency of the PUBLIC HEALTH SERVICE concerned with the overall planning, promoting, and administering of programs pertaining to maintaining standards of quality of foods, drugs, therapeutic devices, etc.Drug Approval: Process that is gone through in order for a drug to receive approval by a government regulatory agency. This includes any required pre-clinical or clinical testing, review, submission, and evaluation of the applications and test results, and post-marketing surveillance of the drug.
Dingwell, JB; Marin, LC (2006). "Kinematic variability and local dynamic stability of upper body motions when walking at ... knock-knee, pigeon toe, and club foot. Misaligned sockets can simulate excessive hip and knee flexion and extension. As ... Step variability is also related to balance and lateral stability. The variability in length and width of steps can be ... The variability can manifest as a combination of differences in the length and width of the strides in comparison to the intact ...
The hip, knee, and ankle joints move through cyclical kinematic patterns that are controlled by muscles which cross these ... Kinematic and kinetic patterns in human gait: Variability and compensating effects. Human Movement Science. 1984;3(1-2):51-76. ... At this point the knee flexor muscles concentrically flex the knee again for swing phase. The maximum knee flexion that occurs ... The knee has a more complex movement pattern compared to the hip. At heel contact the knee extensor and flexor muscles co- ...
... as well the potential for reduced knee variability and risk of injury. "Hey Pal - What's Your Q Factor?". 1992 Bridgestone ... Disley, B.X. & Li, F-X. "Metabolic and kinematic effects of self-selected q factor during bike fit". Research in Sports ...
November 2009), "A systematic study of variability among OB-stars based on HIPPARCOS photometry", Astronomy and Astrophysics, ... "right knee of the giant". Saiph has a stellar classification of B0.5 Ia. The luminosity class 'Ia' represents a bright ... "Probing the evolving massive star population in Orion with kinematic and radioactive tracers". Astronomy and Astrophysics. 520 ...
This excess of kinematic degrees of freedom means that there are multiple arm configurations that correspond to any particular ... The components of a motor synergy are expected to change their action to compensate for the errors and variability in other ... but they tend to do it a little slower and with a deeper knee bend. Although having a high percentage of Type II fibers gives a ... kinematic, spatial, etc.). Because the components of a synergy are functionally coupled for a specific task, execution of motor ...
... as well the potential for reduced knee variability and risk of injury.[6][7] ... Disley, B.X. & Li, F-X. "Metabolic and kinematic effects of self-selected q factor during bike fit". Research in Sports ...
24] describe the effects of landmark placement variability on kinematic descriptions of the knee. The positions of these ... Nine UKAs were implanted on identical dry bone knee models (Imperial knee, Medical Models Company, Bristol, UK) by three ... "Effect of tibial component varus on wear in total knee arthroplasty," The Knee, vol. 19, no. 5, pp. 560-563, 2011. View at ... Oxford partial knee-manual of the surgical technique, 2012. *A. Srivastava, G. Y. Lee, N. Steklov, C. W. Colwell Jr., K. A. ...
MAIN OUTCOME MEASURES Maximum joint angles and velocities of the knee and hip during stance, knee flexion, knee adduction, and ... suggesting that patients with unilateral disease maintain kinematic symmetry for longer in the knee osteoarthritis process. ... Future research is needed to determine the efficacy of such strategies with respect to kinematic asymmetry, pain, and disease ... RESULTS There was a significant limb effect for knee flexion at initial contact (P=.01). The bilateral osteoarthritis group ...
Dingwell, JB; Marin, LC (2006). "Kinematic variability and local dynamic stability of upper body motions when walking at ... knock-knee, pigeon toe, and club foot. Misaligned sockets can simulate excessive hip and knee flexion and extension. As ... Step variability is also related to balance and lateral stability. The variability in length and width of steps can be ... The variability can manifest as a combination of differences in the length and width of the strides in comparison to the intact ...
It is concluded that the SS may not be appropriate for measuring knee kinematic variability in the entire gait cycle during ... Spanning Set May Not Be Appropriate for Measuring Knee Kinematic Variability for the Entire Gait Cycle during Over-Ground ... Knee angle variabilities before and after accommodation were assessed using the SS and two conventional methods: mean ... This study aimed to 1) determine the suitability of using spanning set (SS) to measure knee angle variability in the entire ...
Morton NA, Maletsky LP, Pal S, Laz PJ (2007) Effect of variability in anatomical landmark location on knee kinematic ... How precise can bony landmarks be determined on a CT scan of the knee? Knee 16(5):358-365CrossRefGoogle Scholar ... Lombardi AV, Berend KR, Adams JB (2008) Patient-specific approach in total knee arthroplasty. Orthopedics 31(9):927-930CrossRef ... Nizard R (2002) Computer assisted surgery for total knee arthroplasty. Acta Orthop Belg 68(3):215-230Google Scholar ...
Knee joint kinematics were recorded using electromagnetic motion capture devices. Inter-clinician variability was quantified ... However, the dynamic and unconstrained nature of the manoeuvre introduces important kinematic variability. Our main objective ... Accounting for velocity of the pivot shift test manoeuvre decreases kinematic variability. ... Normalization of kinematic parameters using the angular velocity of knee joint flexion produced by the clinicians reduced the ...
The kinematics at the ankle and knee were largely similar across subjects. However, a major kinematic difference occurred at ... There was substantial subject-to-subject variability in the metabolic results. A possible explanation for this variability was ... knee, and hip. Visual 3D calculated joint moments and powers at the ankle, knee, and hip with inverse dynamic models using both ... The first column corresponds to the ankle, the second to the knee, and the third to the hip. The joint angles are in the first ...
The hip, knee, and ankle joints move through cyclical kinematic patterns that are controlled by muscles which cross these ... Kinematic and kinetic patterns in human gait: Variability and compensating effects. Human Movement Science. 1984;3(1-2):51-76. ... At this point the knee flexor muscles concentrically flex the knee again for swing phase. The maximum knee flexion that occurs ... The knee has a more complex movement pattern compared to the hip. At heel contact the knee extensor and flexor muscles co- ...
Background Aging leads to increases in gait variability which may explain the large incidence of falls in the elderly. Body ... The magnitude of hip and knee kinematic variability is increased due to age as revealed with the SD and CV analysis. In the ... In the present study, we found that different levels of BWS and aging affected angular kinematic variability of the hip, knee ... In the present study joint kinematic variability was examined, because it has been shown that variability of stride ...
New insights into anterior cruciate ligament deficiency and reconstruction through the assessment of knee kinematic variability ... Kinematic motion of the anterior cruciate ligament deficient knee during functionally high and low demanding tasks. J Biomech ... Aside from time, the most frequently reported criteria for RTR were: full knee range of motion or ,95% of the non-injured knee ... Association of knee injuries with accelerated knee osteoarthritis progression: data from the Osteoarthritis Initiative. ...
New insights into anterior cruciate ligament deficiency and reconstruction through the assessment of knee kinematic variability ... Variability in leg muscle power and hop performance after anterior cruciate ligament reconstruction. Knee Surg Sports Traumatol ... Level 3: immediate weight bearing does not affect knee laxity and results in decreased incidence of anterior knee pain.91 ... Effects of closed versus open kinetic chain knee extensor resistance training on knee laxity and leg function in patients ...
... knee -29%, p,0.05) and an increased gait variability (p,0.05). Chair-rising was slowed (+28%, p,0.05) with reduced peak power ... and knee joint (45%, p,0.05). A reduced locomotor speed (-22%, p,0.05) was found concomitant with pathological gait rhythmicity ... We assessed sway path and muscle activity in monopedal stance, spatiotemporal, kinematic and variability characteristics in ... We assessed sway path and muscle activity in monopedal stance, spatiotemporal, kinematic and variability characteristics in ...
Kinematic analysis revealed pronounced restrictions in knee and ankle joint excursion, increased gait variability and asymmetry ... Kinematic analysis revealed pronounced restrictions in knee and ankle joint excursion, increased gait variability and asymmetry ... Our findings suggest that impaired knee/ankle control is common in patients with MS. Personalised gait profiles and clustering ... Our findings suggest that impaired knee/ankle control is common in patients with MS. Personalised gait profiles and clustering ...
... the clinical importance of gait variability, and underlying mechanisms that drive gait variability in individuals with MS. ... It is well established that persons with MS have greater gait variability compared to age and gender matched controls without ... The reasons for the increase in gait variability are not completely understood. Evidence indicates that disability level, ... In this paper, current research concerning gait variability in persons with multiple sclerosis (MS) is discussed. ...
The Kinematic Sequence. Inter- and Intra-Individual Movement Variability in the Golf Swing. Skill Learning and Technology in ... The Analysis of Knee Joint Movement During Golf Swing in Professional and Amateur Golfers. M.Somjarod, V. Tanawat, l. Weerawat ...
Kinematic variability was assessed for each participant by calculating the standard deviation (SD) of peak knee flexion, ... Results: There was an increase in variability for peak knee adduction angle, peak knee adduction velocity, hip flexion/knee ... Kinematic variables measured were tibial inclination, knee varus, and knee valgus. Pearson product moment correlation ... Kinematic and Coordination Variability in Runners with and Without. Patellofemoral Pain*. Authors: Jessica A. Mutchler, Klarie ...
... knee and ankle kinematic waveforms furthermore, we evaluated the …step width. Results: We observed a positive correlation ... results suggest that PFC activity is linked to gait compensatory mechanisms more than to the variability of the joint kinematic ... To investigate the intra-subject variability of gait, we calculated the coefficient of multiple correlation (CMC) of the hip, ... functioning during ataxic gait is linked to compensatory mechanisms or to the typical intra-subject variability of the ataxic ...
Kinematic variability and local dynamic stability of gait in individuals with hip pain and a history of developmental dysplasia ... Correction: Six degree-of-freedom knee joint kinematics in obese individuals with knee pain during gait. PLoS One. 2019; 14(2): ... Females and males use different hip and knee mechanics in response to symmetric military-relevant loads. J Biomech. 2019 Oct 11 ... Weight loss changed gait kinematics in individuals with obesity and knee pain. Gait Posture. 2019 02; 68:461-465. PMID: ...
6. Gorton III G.E., Hebert D.A., Gannotti M.E., Assessment of the kinematic variability among 12 motion analysis laboratories. ... abduction/adduction of the knee joint and for all foot kinematic parameters. Conclusions. Conducting gait analysis by one ... Van der Linden M.L., Kerr A.M., Hazlewood M.E., Hillman S.J.M., Robb J.E., Kinematic and kinetic gait characteristics of normal ... Benoit D.L., Ramsey D.K., Lamontagne M., Xu L., Wretenberg P., Renström P., In vivo knee kinematics during gait reveals new ...
The highest reliability indices occurred in the hip and knee in the sagittal plane, with lowest errors in pelvic rotation and ... Variability between studies, however, suggests that they are not always achieved. authors * McGinley, Jennifer L ... The reliability of three-dimensional kinematic gait measurements: A systematic review Academic Article * View record in Web of ... BACKGROUND/AIM: Three-dimensional kinematic measures of gait are routinely used in clinical gait analysis and provide a key ...
Monte Carlo simulations (N = 100,000) using randomly perturbed initial kinematic conditions, based on the subjects variability ... You are here: Home / Exposures / McLean, Su, van den Bogert, 2003 / Development and Validation of a 3-D Model to Predict Knee ... Development and validation of a 3-D model to predict knee joint loading during dynamic movement, S.G. McLean, A. Su and A.J. ... Resultant knee joint loading variables extracted from the optimized model were comparable to those reported in the literature. ...
... neck internal/external rotation variability (β = 0.29), trunk adduction/abduction variability (β = 0.46) and right knee ... A kinematic model (Plug-In-Gait, Vicon, Oxford) was used to generate three-dimensional joint angles for the knees, hips, trunk ... these were variability and amplitude of movements of the neck and trunk, and speed of movements of the right knee. In summary, ... the relevant components being speed of right knee flexion/extension (bending) and speed of right knee internal/external ...
... knees were used for the kinematic component of the study and a further 26 subjects furnished n? knees with Segond # ... Likely, they will also determine whether variability exists between genders, sides, ethnic groups, with age and so on. It is ... if my knee surgeon did not know something the size of this ALL was in my knee, I simply would not want him touching my knee. ... These knees, in addition to three nondissected knees, were studied with magnetic resonance (MR) imaging by using standard and ...
Three-dimensional kinematic and kinetic gait patterns of 42 patients with severe knee osteoarthritis were collected 1 week ... Principal component analysis extracted major patterns of variability in the gait waveforms. Overall and midstance knee ... Overall knee flexion angle magnitude increased due to an increase during swing. Increases in the early stance knee flexion ... The Effect of Total Knee Arthroplasty on Knee Joint Kinematics and Kinetics During Gait. ...
... and anatomical plane were identified for summated joint kinematic variability. However, variability in the sagittal plane was ... We observed that CAI group displayed a significantly increased knee flexion angle, knee flexion displacement, peak knee ... The combination of joint kinematic variability and time spent in coordination patterns throughout a closed chain task may ... Joint and segment angles were processed and analyzed for eight repetitions to determine kinematic variability and segment ...
  • This is especially useful in operations such as unicompartmental knee arthroplasty (UKA) where previous studies have shown the substantial effect of implant position inaccuracy [ 3 - 5 ]. (hindawi.com)
  • This study reports on the less documented knee kinematics and kinetics of uni-compartmental knee arthroplasty (UKA) patients during walking as a secondary outcome measure of a RCT between a fixed bearing UKA robotic procedure versus a mobile bearing UKA manual procedure. (easychair.org)
  • No association between preoperative physical activity level and time to return to work in patients after total hip or knee arthroplasty: A prospective cohort study. (bioportfolio.com)
  • It is important for patients of working age to resume work after total hip or knee arthroplasty (THA/TKA). (bioportfolio.com)
  • This poses a problem when knee flexion is required, especially during the transition from the stance phase to the swing phase. (wikipedia.org)
  • It described a total lower-limb pattern occurring at the hip, knee, and ankle during stance. (wikipedia.org)
  • Following through to mid-and terminal stance, the knee gradually extends with concentric activity of the knee extensor muscles and approaches near full extension as heel off occurs (30-40% of gait cycle). (wikipedia.org)
  • We assessed sway path and muscle activity in monopedal stance, spatiotemporal, kinematic, and variability characteristics in gait, functional mobility with repeated chair-rises and Timed Up and Go (TUG). (frontiersin.org)
  • Increases in the early stance knee flexion moment and late stance knee extension moment were found, indicating improved impact attenuation and function. (dal.ca)
  • A decrease in the early stance knee external rotation moment indicated alteration in the typical rotation mechanism. (dal.ca)
  • The researchers first performed 3D motion analysis on 56 athletes and identified three variables that predicted mean PFJ impulse during the stance phase of running: knee angle at midstance, step length, and vertical excursion of the center of mass. (lermagazine.com)
  • Both knee and ankle muscle co-activation indexes were positively correlated with disease severity, while ankle muscle co-activation was also positively correlated with stance and swing duration variability. (elsevier.com)
  • average knee and hip range of motion (ROM) during stance and swing were significantly different than baseline after inducing DOMS. (brocku.ca)
  • The root mean square (RMS) values were used to evaluate the in-phase or out-of-phase states, while the standard deviation (SD) values were utilized to evaluate the variability in the stance and swing phases during level walking and in the preflight, flight, and landing phases during one-leg hopping. (peerj.com)
  • Increased rearfoot eversion, rearfoot internal rotation and forefoot inversion are associated with reduced knee adduction moments during the stance phase of gait, suggesting that medial knee joint loading is reduced in people with OA who walk with greater foot pronation. (biomedcentral.com)
  • At the admission test walking velocity, peak knee extension in mid stance and peak dorsiflexion in swing were the three factors that best characterized the groups. (sportdocbox.com)
  • At 6 months the explanatory variables were velocity, knee extension in terminal stance, and knee flexion in pre swing. (sportdocbox.com)
  • Experimental knee pain resulted in up to (i) 0.05 N/kg less vertical GRF and 0.02 N/kg more vertical GRF during various stance phases, (ii) 0.01 N/kg less breaking GRF during loading response, and (iii) 0.007 N/kg less lateral GRF and 0.007 N/kg more lateral GRF during various stance phases in the involved limb. (forceandmotion.org)
  • Conclusions: Relative to the pre-infusion condition, subjects during the knee pain condition tended to walk with less vertical, posterior and lateral GRF in the involved limb (painful limb) across various portions of stance, which simultaneously increased loads in the uninvolved limb (non-painful limb). (forceandmotion.org)
  • We found significant correlations between RE and biomechanical variables (vertical oscillation of the center of mass, stride frequency, stride length, balance time, relative stride length, range of elbow motion, internal knee, ankle angles at foot strike, and electromyographic activity of the semitendinosus and rectus femoris muscles). (podiatryarena.com)
  • Prosthetic limbs provide support to the user and more advanced models attempt to mimic the function of the missing anatomy, including biomechanically controlled ankle and knee joints. (wikipedia.org)
  • An amputation between the knee and ankle joints transecting the tibia, or shinbone, is referred to as a transtibial amputation. (wikipedia.org)
  • Unlike transtibial amputations, transfemoral amputations occur between the hip and the knee joints, along the length the femur. (wikipedia.org)
  • Implementing a prosthetic leg requires the user to mechanically control the behaviors of the prosthetic knee and ankle joints through gross adjustments of the hip, rather than the finer and more precise movements of the missing joints. (wikipedia.org)
  • and to prevent this collapse, vertical support of the body requires net extensor activity at the hip, knee, and ankle joints. (wikipedia.org)
  • Moreover, higher levels of BWS presented increased variability at all joints as found in both the linear and nonlinear measures utilized. (springer.com)
  • Angular displacements and dynamic torques produced at each of the three lower limb joints (hip, knee and ankle) were calculated from segmental position data recorded during each trial. (biomedcentral.com)
  • The first question is: Are there rules that describe the relationships among multiple joints such as the ankle, knee and hip during locomotion since successful locomotion requires the coordination of all three joints and their associated muscle groups? (biomedcentral.com)
  • Many authors have suggested that for movements that involve multiple body segments, kinematic descriptions of the moving segments or joints may be reduced to a small number of variables. (biomedcentral.com)
  • The aim of this study was to investigate the co-activation pattern of the antagonist muscles of the ankle and knee joints during walking in patients with cerebellar ataxia, a neurological disease that strongly affects stability. (elsevier.com)
  • These results are compatible with regard to the neutral position of the knee and hip joints, and anatomically and kinesiologically justified in normal subjects. (scirp.org)
  • From the collected data we were able to identify kinematic variables describing the temporal and phasic structure of locomotion, as well as the angular changes in the major joints of the lower limbs (ankle, knee and hip) in the sagittal plane. (micrornainhibitor.com)
  • It crosses both the knee and the ankle joints and acts as a major plantarflexor of the ankle and a minor flexor of the knee. (medscape.com)
  • The peak/body weight of impact force of GRF upon landing was attenuated by the cushioning effects of the lower extremity functions, i.e. bending of the knee and ankle joints, more effectively on two legs than on one. (bisp-surf.de)
  • The objective of the present study was to perform an initial kinematic verification of a dynamic finite element model of the Kansas knee simulator by comparing predicted tibio- and patellofemoral kinematics with experimental measurements during force-controlled gait simulation. (asme.org)
  • 2018. Distinguishing between knee rehabilitation exercises using inertial measurement units . (cardiff.ac.uk)
  • 2018. Improving access to care and treatment for patients with hip and knee pain at the interface between primary and secondary care . (cardiff.ac.uk)
  • 2018. An evaluation of TRAK physiotherapy self management intervention development and delivery for knee conditions . (cardiff.ac.uk)
  • Altered control strategy between leading and trailing leg increases knee adduction moment in the elderly while descending stairs. (semanticscholar.org)
  • Overall and midstance knee adduction moment magnitude decreased. (dal.ca)
  • This study aimed to investigate the mechanisms underpinning the reduction in external knee adduction moment (EKAM) in older adult women who wore this type of footwear through a randomized controlled trial. (bvsalud.org)
  • This study aimed to 1) determine the suitability of using spanning set (SS) to measure knee angle variability in the entire gait cycle and 2) assess the sensitivity of SS magnitude to the order of polynomial fitted to the standard deviation ( SD ) curves of the mean ensemble curves. (humankinetics.com)
  • Knee angle variabilities before and after accommodation were assessed using the SS and two conventional methods: mean coefficient of variation and mean SD . (humankinetics.com)
  • Overall knee flexion angle magnitude increased due to an increase during swing. (dal.ca)
  • The patellar tendon angle, knee flexion angle and implant position was calculated for each video frame.The patellar tendon angle was 5° lower in the deficient group, indicating greater anterior tibial translation compared to the intact group between 30 and 40° of flexion. (ox.ac.uk)
  • The JOURNEY II knee is designed with an anterior dwell point and 3° varus jointline which restores the natural patellar tendon angle and improves patella track. (smith-nephew.com)
  • At the time of this writing, the most recent recommendations from a comprehensive review of the scientific literature recommends assessing appropriate saddle height by measuring knee angle at bottom dead center (BDC) and achieving a target range of 25-30 degrees flexion (Bini et al 2011). (veloclinic.com)
  • More recent studies improve upon performance maximization using a target knee angle of 25 degrees BDC as compared to the traditional method (Peveler et al 2007, and Peveler 2008, Peveler and Green 2011). (veloclinic.com)
  • The use of a target knee angle at BDC to assess appropriate seat height is supported by studies describing strong kinematic relationships between knee angle at BDC and large 4 - 10% changes in seat heights (Nordeen-Snyder 1977, Price and Donne 1997, Sanderson and Amoroso 2009). (veloclinic.com)
  • The major commercial fit methods of SICI and BIKEFIT also primarily use the 25 -35 degree knee angle at BDC to assess saddle height as part of a whole body optimization (SICI 2007, Swift and Schoenfeldt). (veloclinic.com)
  • Optical methods were used to investigate the cushioning effects of lower extremity functions, since these facilitated the quantitation of kinematic variables such as angle, change in angle, position, displacement and velocity during the landing. (bisp-surf.de)
  • Other nonlinear metrics, such as detrended fluctuation analysis and approximate entropy, have been used to examine the temporal sequential structure of gait variability (i.e., the time-evolving structure of variability) [ 19 ]. (hindawi.com)
  • Transfemoral amputees, on average, have more variability in stride length and walking speed, more asymmetry in temporal measures between limbs, and have an overall slower walking speed than transtibial amputees. (wikipedia.org)
  • The highest reliability indices occurred in the hip and knee in the sagittal plane, with lowest errors in pelvic rotation and obliquity and hip abduction. (edu.au)
  • Sagittal plane knee fluoroscopy was taken while patients performed step-up and forward lunge exercises. (ox.ac.uk)
  • There is a greater risk of tibial component loosening when mobile unicompartmental knee replacement is performed in anterior cruciate ligament deficient knees. (ox.ac.uk)
  • The JOURNEY II knee is designed with an anterior tibial sulcus to restore the native knee's normal starting AP position, preventing paradoxical motion. (smith-nephew.com)
  • Because the axis of rotation and had surgery between and degrees are considered separately for tibial - on - femoral knee extension. (goodsamatlanta.org)
  • This paper reports the development of an in-vitro technique allowing quantification of relative (not absolute) deformations measured at the level of the cancellous bone of the tibial proximal epiphysis (CB TPE ) during knee flexion-extension. (biomedcentral.com)
  • The methods utilised do not allow tracking of in-vivo femoro-tibial articular deformations during continuous knee flexion-extension motion despite the usefulness of these studies. (biomedcentral.com)
  • Modifying the metal-polyethylene coefficient of friction from 0.1 to 0.01 varied the patellar flexion-extension and tibiofemoral anterior-posterior predictions by 7 deg and 2 mm, respectively, while other kinematic outputs were largely insensitive. (asme.org)
  • Background: Several researchers consider the clinical epicondylar axis (CEA) as the functional flexion-extension axis of the knee. (scirp.org)
  • Knee motion data were collected by three-dimensional (3D) electrogoniometry during several cycles of knee flexion-extension. (biomedcentral.com)
  • This small amount of knee flexion is controlled eccentrically by the knee extensor muscles which serve the purpose of cushioning the rate of loading on the lower limb and preventing excessive knee flexion. (wikipedia.org)
  • Previous studies have developed mechanical models or presented theoretical analyses of running across water, but no detailed kinematic descriptions of limb motion are currently available. (biologists.org)
  • Knee sleeve associated with changes in lower limb segment kinematics and coordination during hopping. (peerj.com)
  • Therefore, this study aims to verify whether the use of knee sleeves affects the coordination of lower-limb segments during level walking and one-leg hopping. (peerj.com)
  • The aim of this study was to examine the influence of skill of expert triple jumpers on the coordination variability of lower extremity intra-limb couplings. (biomedsearch.com)
  • Skin movement during the kinematic analysis of the canine pelvic limb. (orthovetsupersite.org)
  • To determine whether the canine pelvic limb can be considered a linkage of rigid bodies during kinematic analysis. (orthovetsupersite.org)
  • Dmitry Domkin, disputation 2005-04-12 Perception and control of upper limb movement: Insights gained by analysis of sensory and motor variability. (hig.se)
  • This unloading pattern in the involved limb may be due to perception of knee pain, which can make subjects feel fear for damaging or provoking pain more during walking. (forceandmotion.org)
  • Moreover, voluntary and/or involuntary quadriceps inhibition (e.g., neuromuscular activation and strength) due to experimentally induced knee pain may play a role in reducing the loads in the involved limb because the quadriceps support the center of body mass eccentrically from initial loading response to midstance to prevent collapse of the lower limbs. (forceandmotion.org)
  • A software and hardware platform for gait simulation and system evaluation for lower limb intelligent prosthesis is proposed and designed, in order that the wearable symmetry effect of the intelligent knee prosthesis can be quantitatively analyzed by machine test instead of human wear test. (bioportfolio.com)
  • Given the marked variability in proximal humeral anatomy,7 there is no single position or orientation of the prosthesis that will replicate the normal anatomy in all patients.8 In view of these challenges using traditional surgical techniques, a more accurate reduction may be obtained using computer-assisted hemiarthroplasty techniques. (redorbit.com)
  • Surface markers are: Ankle - 10 mm proximal to the tip of the lateral malleolus Knee - lateral femoral epicondyle hip - superior aspect of the greater trochanter Of course parallax error is a problem if the camera is not positioned correctly, related to movement of the subject. (clinicalgaitanalysis.com)
  • A consequence of the proximal and distal attachments of the tract may be that external snapping is associated with increased hip adduction and increased knee rotation as it has been documented in runners with iliotibial band syndrome [ 15 ]. (biomedcentral.com)
  • Fifty-six participants with medial compartment knee OA were equally allocated to either an intervention group (IG) that wore minimalist footwear (Moleca®) or to a control group (CG) that continued regular clinical treatment for OA for six months. (bvsalud.org)
  • Therefore, this study aimed to investigate the relationship between tibia, rearfoot and forefoot motion in the frontal and transverse planes and the KAM in people with medial compartment knee OA. (biomedcentral.com)
  • Although several factors have been associated with the incidence and progression of OA, particularly medial compartment knee OA, the aetiology of knee OA is not fully understood. (biomedcentral.com)
  • patellofemoral pain syndrome , alternatively known as runner's knee, anterior knee pain, and (sometimes erroneously) chondromalacia or chondromalacia patellae. (runningwritings.com)
  • Patellofemoral pain syndrome" or PFPS is the broadest and most common term, but is often criticized for being a "wastebasket term"-an umbrella definition for any unexplained anterior (frontal) knee pain. (runningwritings.com)
  • The purpose of this study was to assess the effects of applying five modifications (M1-M5) to the CI algorithm to determine whether the magnitude and variability of the patellofemoral CI is dependent on the surface representation used. (asme.org)
  • The magnitude and variability of the patellofemoral CI was dependent on the surface representation used, suggesting that standardization of the surface representation is important to provide a consistent measure. (asme.org)
  • Sagittal kinematics of mobile unicompartmental knee replacement in anterior cruciate ligament deficient knees. (ox.ac.uk)
  • The purpose of this study was to examine the kinematic behaviour of a subcohort of these patients.The kinematic behaviour of anterior cruciate deficient knees (n=16) after mobile unicompartmental knee replacement was compared to matched intact knees (n=16). (ox.ac.uk)
  • Whether these altered knee kinematics will have a clinical impact is as yet undetermined, but more long-term outcome data is required before mobile unicompartmental knee replacement can be recommended for an anterior cruciate ligament deficient patient. (ox.ac.uk)
  • A statistically compiled test battery for feasible evaluation of knee function after rupture of the Anterior Cruciate Ligament - derived from long-term follow-up data. (umu.se)
  • Using in vivo kinematic analyses, in vitro electrophysiological recordings and specific CNS lesions, we have investigated spino-extraocular motor coupling in the juvenile frog and the underlying neural pathways to understand how gaze control processes are altered in accordance with the animal's change in body plan and locomotor strategy. (jneurosci.org)
  • Similarly, the strength of the knee extensor muscles is compromised in women who develop radiographic and symptomatic signs of knee OA, but the extent to which the decline in muscle function precedes the development of the disease is uncertain. (biomedcentral.com)
  • It is assumed that larger external knee flexion moments would require larger knee extensor muscle forces to prevent collapse of the lower extremity during walking ( Crowninshield and Brand, 1981 ). (pubmedcentralcanada.ca)
  • Due to variability between test occasions, changes would need to exceed 10°-15° for lumbar lordosis, 5°-15° for ROM components, and 8-15 % of lumbar contribution to lumbo-pelvic rhythm, to have 90 % confidence that movements had actually changed. (biomedcentral.com)
  • Lordosis, range of movement and lumbo-pelvic rhythm typically demonstrate variability between same-day and different-day tests. (biomedcentral.com)
  • Since different metrics quantify different aspects of gait variability and operate on different timescales, selection of the appropriate metric(s) for answering a particular research question is critical in investigations of gait variability [ 2 ]. (hindawi.com)
  • 4 However, RTR marks the beginning of the transition from impairment-focused tasks in early rehabilitation (eg, knee range of motion (RoM) exercises, isometric quadriceps strengthening) to the functional, sport-specific tasks that characterise more advanced rehabilitation (eg, sprinting, pivoting, cutting). (bmj.com)
  • In the final stages of developing a skilled performance, a functional variability is accessed that brings flexibility to the system allowing it to cope with perturbations. (biomedsearch.com)
  • 1. Li Y, Zhu Y, Nguchu BA, Wang Y, Wang H, Qiu B, Wang X. Dynamic Functional Connectivity Reveals Abnormal Variability and Hyper-connected Pattern in Autism Spectrum Disorder . (cra-rhone-alpes.org)
  • 2017. Integrating self-management support for knee injuries into routine clinical practice: TRAK intervention design and delivery . (cardiff.ac.uk)
  • Most studies providing estimates of data error reported values (S.D. or S.E.) of less than 5 degrees , with the exception of hip and knee rotation. (edu.au)
  • Background: While several studies describe kinematics of healthy and osteoarthritic knees using the accurate imaging and computer modelling now possible, no systematic review exists to synthesise these data. (edu.au)
  • Three-dimensional kinematic and ground reaction force data were collected during the hop-step transition phase of the triple jump. (biomedsearch.com)
  • Kinematic data were obtained using an electromagnetic tracking device. (redorbit.com)
  • Based solely on visual inspection of the kinematic data, de Quervain et al. (sportdocbox.com)
  • Kinematic data were divided into individual gait cycles for each side of the body. (micrornainhibitor.com)
  • Data from the 10 meter TUG were used to identify pertinent sensors on the trunk, head, hip, knee, and thigh that provided suitable data for detecting and segmenting activities associated with the TUG. (biomedcentral.com)
  • Raw data from sensors were detrended to remove sensor drift, normalized, and band pass filtered with optimal frequencies to reveal kinematic peaks that corresponded to different activities. (biomedcentral.com)
  • The Acrobot Sculptor is an example of such a robot that can assist with unicompartmental knee replacement. (hindawi.com)
  • Significantly higher peak values of the varus knee and internal rotation moments were measured for the robotic assisted group during early and late section of the gait cycle, respectively. (easychair.org)
  • When walking at a controlled speed of 1.0 m/s, subjects with moderate and severe knee OA showed significantly higher co-contraction when compared to a healthy control group. (pubmedcentralcanada.ca)
  • One prominent theory on the mechanisms underlying the development of knee OA attributes a primary role to perturbations of the local mechanical environment [ 1 ], especially the loads experienced by the articular cartilage. (biomedcentral.com)