abstract：:In this paper, we apply the micropipette to reduce the surface area of the rabbit aorta, and the relationship between the fractional area change of the aortic surface and the negative pressure in the pipette is studied. The experimental results for seven rabbit thoracic aortas show that the relationship can be express...

journal_title：Journal of biomechanics

authors： Yu Q,Wang X,Li G

更新日期：1996-08-01 00:00:00

abstract：:The problem of blood flow through stenoses is solved using the incompressible generalized Newtonian model. The Herschel-Bulkley, Bingham and power-law fluids are incorporated. The geometry corresponds to a rigid circular tube with a partial occlusion. Calculations are performed by a Galerkin finite-element method. For...

journal_title：Journal of biomechanics

authors： Tu C,Deville M

更新日期：1996-07-01 00:00:00

abstract：:How small do pressure transducers need to be in order to faithfully measure the plantar pressure profiles (PPPs) under normal and diabetic feet? In this study, pressures were collected from five diabetic and six non-diabetic subjects using a commercial measurement system with 25 mm2 transducers. Discrete Fourier Trans...

journal_title：Journal of biomechanics

authors： Davis BL,Cothren RM,Quesada P,Hanson SB,Perry JE

更新日期：1996-07-01 00:00:00

abstract：:The ability to limit the trunk flexion associated with an anteriorly directed trip is a determinant of successful recovery of recovering postural stability and is subservient to rapidly detecting and correcting the imposed trunk flexion in the available time. This experiment tested the hypothesis that subjects demonst...

journal_title：Journal of biomechanics

authors： Grabiner MD,Feuerbach JW,Jahnigen DW

更新日期：1996-06-01 00:00:00

abstract：:The purpose of this study was to determine the accuracy of a video system which our laboratory has been using to measure soft tissue strain. Both static and dynamic error analyses were performed to assess the accuracy of our video system. Static error was defined as the amount of movement reported by the video system ...

journal_title：Journal of biomechanics

authors： Smutz WP,Drexler M,Berglund LJ,Growney E,An KN

更新日期：1996-06-01 00:00:00

abstract：:The dynamics of arterial wall remodeling was studied on the basis of a phenomenological mathematical model. Sustained hypertension was simulated by a step increase in blood pressure. Remodeling rate equations were postulated for the evolution of the geometrical dimensions that characterize the zero stress state of the...

journal_title：Journal of biomechanics

authors： Rachev A,Stergiopulos N,Meister JJ

更新日期：1996-05-01 00:00:00

abstract：:The estimation of segment inertial parameters (SIPs) is an important source of error in inverse dynamic analysis. In most individual cases SIPs are derived from extrapolation of known SIPs of a certain population through regression equations (proportional models). Another well-known method is the use of mathematical a...

journal_title：Journal of biomechanics

authors： Kingma I,Toussaint HM,De Looze MP,Van Dieen JH

更新日期：1996-05-01 00:00:00

abstract：:The mechanical energy expenditures (MEEs) of two human lower extremity models with different sources of mechanical energy - (1) muscles and (2) joint moments - were compared theoretically. Sources of mechanical energy producing movement of Model 1 were eight muscle, three of which were two-joint muscles. Sources of me...

journal_title：Journal of biomechanics

authors： Prilutsky BI,Petrova LN,Raitsin LM

更新日期：1996-04-01 00:00:00

abstract：:Vortex-ring production was studied in axisymmetric elastomeric ventricles designed to stimulate flow in a cardiovascular assist device. A flow visualization technique was used to investigate the effects of reducing the inlet diameter and predilating the ventricle on vortex travel in two ventricles of different shape a...

journal_title：Journal of biomechanics

authors： Shortland AP,Black RA,Jarvis JC,Henry FS,Iudicello F,Collins MW,Salmons S

更新日期：1996-04-01 00:00:00

abstract：:Previous studies of compensatory stepping, in response to postural perturbation, have focussed on forward or backward stepping; however, the ability to step in other directions is of equal functional importance, since the perturbations encountered in daily life may often include a lateral component. The primary object...

journal_title：Journal of biomechanics

authors： Maki BE,McIlroy WE,Perry SD

更新日期：1996-03-01 00:00:00

abstract：:With the aim of proposing modelling equations for the length, force and shortening velocity of the triceps brachii, an X-ray and biomechanical study was carried out on the elbow joint. Two series of three upper right limbs removed from cadavers were used. It allowed us to situate the articular rotational axis of the e...

journal_title：Journal of biomechanics

authors： Gerbeaux M,Turpin E,Lensel-Corbeil G

更新日期：1996-02-01 00:00:00

abstract：:The purpose of the study was to evaluate the rates of change in the estimated masses and principal moments of inertia of the body segments during the second and third trimesters of pregnancy. Fifteen subjects, on average 15.1 weeks pregnant, were tested monthly until term. The body was modelled as 16 segments consisti...

journal_title：Journal of biomechanics

authors： Jensen RK,Doucet S,Treitz T

更新日期：1996-02-01 00:00:00

abstract：:Seated ergometer pedaling is a motor task ideal for studying basic mechanisms of human bipedal coordination because, in contrast to standing and walking, fewer degrees of freedom are being controlled and upright balance is not a factor. As a step toward understanding how individual muscles coordinate pedaling, we inve...

journal_title：Journal of biomechanics

authors： Fregly BJ,Zajac FE

更新日期：1996-01-01 00:00:00

abstract：:Resident cells in the surface epitenon and internal compartment of flexor tendons are subjected to cyclic mechanical load as muscle contracts to move limbs or digits. Tendons are largely tensile load bearing tissues and are highly matrix intensive with nondividing cells providing maintenance functions. However, when a...

journal_title：Journal of biomechanics

authors： Banes AJ,Tsuzaki M,Hu P,Brigman B,Brown T,Almekinders L,Lawrence WT,Fischer T

更新日期：1995-12-01 00:00:00

abstract：:Refractures and secondary fractures occur after removal of internal fixation devices even when the X-rays show well-mineralized bony unions. This indicates the unreliability of bone density as the only parameter to estimate the strength of healing bone. The aim of this study was to show that the strength of healing bo...

journal_title：Journal of biomechanics

authors： Claes LE,Wilke HJ,Kiefer H

更新日期：1995-11-01 00:00:00

abstract：:This study investigated the accuracy of the direct linear transformation (DLT) and non-linear transformation (NLT) methods of 3-D cinematography/videography. A comparison of standard DLT, extrapolated DLT, and NLT calibrations showed the standard (non-extrapolated) DLT to be the most accurate, especially when a large ...

journal_title：Journal of biomechanics

authors： Hinrichs RN,McLean SP

更新日期：1995-10-01 00:00:00

abstract：:The understanding of impact mechanics during locomotion is important for research within the fields of injury prevention and footwear design. Instrumented missiles offer a worthy solution to the lack of control inherent in in vivo activities and to the isolated nature of tissue studies. However, missiles cannot mimic ...

journal_title：Journal of biomechanics

authors： Lafortune MA,Lake MJ

更新日期：1995-09-01 00:00:00

abstract：:Energy conservation in swimming is formulated in terms of four functions of the swim speed v: the consumed power K, the mechanical power P used for horizontal propulsion, the remaining expended mechanical power N, and the thermal power loss H. K is well-known (from VO2) and P = FDv, where the drag force FD is not know...

journal_title：Journal of biomechanics

authors： Brandt RA,Pichowsky MA

更新日期：1995-08-01 00:00:00

abstract：:The forces and moments acting at the hip joint influence the long-term stability of the fixation of endoprostheses and the course of coxarthrosis. These loads may depend on the kind of footwear and the walking or running style. These factors were investigated in a patient with instrumented hip implants. He wore differ...

journal_title：Journal of biomechanics

authors： Bergmann G,Kniggendorf H,Graichen F,Rohlmann A

更新日期：1995-07-01 00:00:00

abstract：:Earlier experimental and finite element studies notwithstanding, the load transfer and stress distribution in the pelvic bone and the acetabulum in normal conditions are not well understood. This hampers the development of orthopaedic reconstruction methods. The present study deals with more precise finite element ana...

journal_title：Journal of biomechanics

authors： Dalstra M,Huiskes R

更新日期：1995-06-01 00:00:00

abstract：:Considerable forces and moments act at hip prostheses during most kinds of physical activities. High torque around the stem axis may contribute to implant loosening. With instrumented hip prostheses the joint force and its direction, the bending moment in the frontal plane and the torque were measured in two patients ...

journal_title：Journal of biomechanics

authors： Bergmann G,Graichen F,Rohlmann A

更新日期：1995-05-01 00:00:00

abstract：:The in situ longitudinal strain of canine and porcine aortas was investigated. Marks of black water-resistant ink were placed on the aortas and the axial lengths between the marks were measured in situ and in vitro. When the aortas were cut, the retraction was measured and described by the stretch ratio, which is defi...

journal_title：Journal of biomechanics

authors： Han HC,Fung YC

更新日期：1995-05-01 00:00:00

abstract：:The nonlinear stress-strain characteristics of the human menisci were determined by uniaxial elongation tests performed on circumferential and radial specimens prepared from different regions, layers, and locations. The properties of the collagen fibers and the matrix were calculated using the test results along with ...

journal_title：Journal of biomechanics

authors： Tissakht M,Ahmed AM

更新日期：1995-04-01 00:00:00

abstract：:The purpose of this study was to determine whether the same estimates of individual muscle and L4/L5 lumbar joint compressive forces result from an optimization (OPT) compared to an electromyography (EMG) assisted approach for solving the inderminate moment equilibrium equations in the same anatomical model. Four male...

journal_title：Journal of biomechanics

authors： Cholewicki J,McGill SM,Norman RW

更新日期：1995-03-01 00:00:00

abstract：:The transmission of load through the lumbar spine was analyzed in a model of the five lumbar vertebrae, the sacrum/pelvis and the thorax, and 66 symmetric pairs of multijoint muscles. The model was used to test the hypotheses that (1) the need to maintain equilibrium simultaneously at all vertebral levels precludes si...

journal_title：Journal of biomechanics

authors： Stokes IA,Gardner-Morse M

更新日期：1995-02-01 00:00:00

abstract：:Rubin et al. [J. Biomechanics 23, 43-54 (1990)] proposed that high frequency bone strains in the 15-30 Hz range might have significant influence on the morphological adaptation of bone tissue. We sought to further their findings by determining the magnitude of high frequency strains during various activities. We measu...

journal_title：Journal of biomechanics

authors： Turner CH,Yoshikawa T,Forwood MR,Sun TC,Burr DB

更新日期：1995-01-01 00:00:00

abstract：:To date, the diagnosis of whiplash injuries has been very difficult and largely based on subjective, clinical assessment. The work by Winters and Peles Multiple Muscle Systems--Biomechanics and Movement Organization. Springer, New York (1990) suggests that the use of finite helical axes (FHAs) in the neck may provide ...

journal_title：Journal of biomechanics

authors： Woltring HJ,Long K,Osterbauer PJ,Fuhr AW

更新日期：1994-12-01 00:00:00

abstract：:In this study, two different strategies of rising from a chair were compared, using integrated biomechanical and electromyographic analyses. Nine healthy subjects were instructed to rise using two different strategies: natural sit-to-stand transfer (NSTS) and a sit-to-stand transfer with full flexion of the trunk (FST...

journal_title：Journal of biomechanics

authors： Doorenbosch CA,Harlaar J,Roebroeck ME,Lankhorst GJ

更新日期：1994-11-01 00:00:00

abstract：:Although the capacity of bone to adapt to functional mechanical requirements has been known for more than a century, it is still unclear how the bone adaptation processes are regulated. We hypothesize that osteocytes are sensitive to mechanical loading and control the regulation of bone mass in their environment. Rece...

journal_title：Journal of biomechanics

authors： Mullender MG,Huiskes R,Weinans H

更新日期：1994-11-01 00:00:00

abstract：:Studying force sharing between synergistic muscles can be useful for understanding the functional significance of musculoskeletal redundancy and the mechanisms underlying the control of synergistic muscles. The purpose of this study was to quantify and explain force sharing between cat soleus (SO) and gastrocnemius (G...

journal_title：Journal of biomechanics

authors： Prilutsky BI,Herzog W,Allinger TL

更新日期：1994-10-01 00:00:00

abstract：:The orientation of the line of pull and geometrical characteristics of rat semimembranosus lateralis muscle (SM1) were measured in a plane during isometric contractions at different muscle lengths. The orientation of the line of pull was always similar in our plane of analysis. It was always aligned with the external ...

journal_title：Journal of biomechanics

authors： Willems ME,Huijing PA

更新日期：1994-09-01 00:00:00

abstract：:A reflection ultrasonic technique, which offers several advantages over transmission ultrasonic techniques, has been described for elastic property measurement of bone. Ultrasonic velocities from specimens of cancellous bone were compared using a reflection ultrasound technique and the more traditional transmission ul...

journal_title：Journal of biomechanics

authors： Ashman RB,Antich PP,Gonzales J,Anderson JA,Rho JY

更新日期：1994-09-01 00:00:00

abstract：:The relationship between patella alta and patellar subluxation may, in part, reflect the relationship between the height of the patella above the tibiofemoral joint line and the patellofemoral contact force. This study reports on the direct in vitro measurement of the patellofemoral contact force, and its point of app...

journal_title：Journal of biomechanics

authors： Singerman R,Davy DT,Goldberg VM

更新日期：1994-08-01 00:00:00

abstract：:Mathematical modelling of tendon thermodynamics predicted that the temperature of the central core of the equine superficial digital flexor tendon would plateau at 11 degrees C above the tendon surface temperature during a sustained gallop. A mean temperature differential (between tendon core and surface) of 5.4 (S.E....

journal_title：Journal of biomechanics

authors： Wilson AM,Goodship AE

更新日期：1994-07-01 00:00:00

abstract：:The finite element method described in this study provides an easy method to simulate the kinetics of multibody mechanisms. It is used in order to develop a musculoskeletal model of the shoulder mechanism. Each relevant morphological structure has been represented by an appropriate element. For the shoulder mechanism ...

journal_title：Journal of biomechanics

authors： van der Helm FC

更新日期：1994-05-01 00:00:00

abstract：:Heart valves induce flow disturbances which play a role in blood cell activation and damage, but questions of the magnitude and spatial distribution of fluid stresses (wall shear stress and turbulent stress) cannot be readily addressed with current experimental techniques. Therefore, a numerical simulation procedure f...

journal_title：Journal of biomechanics

authors： Huang ZJ,Merkle CL,Abdallah S,Tarbell JM

更新日期：1994-04-01 00:00:00

abstract：:The gait cycle is usually analyzed using one of two conventions: heel contact initiates the cycle and stance is followed by swing phases or toe-off initiates the cycle and swing then stance phases are analyzed. The purpose of the study is to demonstrate that based on a consideration of relevant biomechanical measures,...

journal_title：Journal of biomechanics

authors： DeVita P

更新日期：1994-04-01 00:00:00

abstract：:There are almost no published data that describe the creep behavior of trabecular bone (at the specimen level), even though the creep behavior of cortical bone has been well documented. In an effort to characterize the creep behavior of trabecular bone and to compare it with that of cortical bone, we performed uniaxia...

journal_title：Journal of biomechanics

authors： Bowman SM,Keaveny TM,Gibson LJ,Hayes WC,McMahon TA

更新日期：1994-03-01 00:00:00

abstract：:Left ventricular (LV) chamber flow is undoubtedly influenced by the time-dependent regional motion of the LV wall. In an attempt to obtain diagnostic parameters based on LV chamber flow, we computed the LV chamber, two-dimensional systolic velocity and pressure distribution for two right anterior oblique (RAO) ventric...

journal_title：Journal of biomechanics

authors： Schoephoerster RT,Silva CL,Ray G

更新日期：1994-02-01 00:00:00

abstract：:The paper defines the term coordination interval (CI), suggesting that it should replace the term electromechanical delay (EMD), if this parameter is determined in vivo for a muscle functioning in a biomechanical system with considerable mobility, but not in a kinematic pair with one degree of rotational freedom (DOF)...

journal_title：Journal of biomechanics

authors： Kornecki S,Zschorlich V

更新日期：1994-02-01 00:00:00