当前位置： SCI文献检索 > JOURNAL OF BIOMECHANICS期刊下所有文献 > Learning new gait patterns: Exploratory muscle activity during motor learning is not predicted by motor modules.

Learning new gait patterns: Exploratory muscle activity during motor learning is not predicted by motor modules.

Abstract：

:The motor module hypothesis in motor control proposes that the nervous system can simplify the problem of controlling a large number of muscles in human movement by grouping muscles into a smaller number of modules. Here, we tested one prediction of the modular organization hypothesis by examining whether there is preferential exploration along these motor modules during the learning of a new gait pattern. Healthy college-aged participants learned a new gait pattern which required increased hip and knee flexion during the swing phase while walking in a lower-extremity robot (Lokomat). The new gait pattern was displayed as a foot trajectory in the sagittal plane and participants attempted to match their foot trajectory to this template. We recorded EMG from 8 lower-extremity muscles and we extracted motor modules during both baseline walking and target-tracking using non-negative matrix factorization (NMF). Results showed increased trajectory variability in the first block of learning, indicating that participants were engaged in exploratory behavior. Critically, when we examined the muscle activity during this exploratory phase, we found that the composition of motor modules changed significantly within the first few strides of attempting the new gait pattern. The lack of persistence of the motor modules under even short time scales suggests that motor modules extracted during locomotion may be more indicative of correlated muscle activity induced by the task constraints of walking, rather than reflecting a modular control strategy.

journal_name

J Biomech

journal_title

Journal of biomechanics

authors

Ranganathan R,Krishnan C,Dhaher YY,Rymer WZ

doi

10.1016/j.jbiomech.2016.02.006

subject

Has Abstract

pub_date

2016-03-21 00:00:00

pages

718-725

issue

5

eissn

0021-9290

issn

1873-2380

pii

S0021-9290(16)30104-X

journal_volume

49

pub_type

杂志文章

相关文献

JOURNAL OF BIOMECHANICS文献大全
  • Non-interacting modes for stress, strain and energy in anisotropic hard tissue.

    abstract：:The six non-interacting modes for stress, strain and energy in an orthotropic elastic model of human femoral cortical bone tissue are discussed and illustrated. The stress and strain modes are illustrated using the representation of the stress and strain fields around a circular hole in a flat plate of cortical bone s...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/0021-9290(91)90311-a

    authors： Cowin SC,Sadegh AM

    更新日期：1991-01-01 00:00:00

  • Effects of broad frequency vibration on cultured osteoblasts.

    abstract：:Bone is subjected in vivo to both high amplitude, low frequency strain, incurred by locomotion, and to low amplitude, broad frequency strain. The biological effects of low amplitude, broad frequency strain are poorly understood. To evaluate the effects of low amplitude strains ranging in frequency from 0 to 50 Hz on o...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/s0021-9290(02)00245-2

    authors： Tanaka SM,Li J,Duncan RL,Yokota H,Burr DB,Turner CH

    更新日期：2003-01-01 00:00:00

  • Precision measurements of the RSA method using a phantom model of hip prosthesis.

    abstract：:Radiostereometric analysis (RSA) has become one of the recommended techniques for pre-market evaluation of new joint implant designs. In this study we evaluated the effect of repositioning of X-ray tubes and phantom model on the precision of the RSA method. In precision measurements, we utilized mean error of rigid bo...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2003.09.004

    authors： Mäkinen TJ,Koort JK,Mattila KT,Aro HT

    更新日期：2004-04-01 00:00:00

  • Conservation of energy in competitive swimming.

    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

    pub_type： 杂志文章

    doi：10.1016/0021-9290(94)00143-r

    authors： Brandt RA,Pichowsky MA

    更新日期：1995-08-01 00:00:00

  • Realistic virtual intracranial stenting and computational fluid dynamics for treatment analysis.

    abstract：:In order to support the decisions of medical experts and to develop better stent designs, the availability of a simulation tool for virtual stenting would be extremely useful. An innovative virtual stenting technique is described in this work, which is directly applicable for complex patient-specific geometries. A bas...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2012.08.047

    authors： Janiga G,Rössl C,Skalej M,Thévenin D

    更新日期：2013-01-04 00:00:00

  • Friction in metal-on-metal total disc arthroplasty: effect of ball radius.

    abstract：:Total disc arthroplasty (TDA) can be used to replace a degenerated intervertebral disc in the spine. There are different designs of prosthetic discs, but one of the most common is a ball-and-socket combination. Contact between the bearing surfaces can result in high frictional torque, which can then result in wear and...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2011.11.045

    authors： Moghadas P,Mahomed A,Hukins DW,Shepherd DE

    更新日期：2012-02-02 00:00:00

  • The effect of centre of mass location on sagittal plane moments around the centre of mass in trotting horses.

    abstract：:The diagonal limb support pattern at trot provides pitch and roll stability, but little is known about the control of moments about the centre of mass (COM) in horses. Correct COM location is critical in the calculation of pitching moments. The objectives were to determine the effect of COM location on pitching moment...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2014.02.024

    authors： Hobbs SJ,Richards J,Clayton HM

    更新日期：2014-04-11 00:00:00

  • Human pendulum approach to simulate and quantify locomotor impact loading.

    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

    pub_type： 杂志文章

    doi：10.1016/0021-9290(95)00002-y

    authors： Lafortune MA,Lake MJ

    更新日期：1995-09-01 00:00:00

  • Velocities and stress levels of axisymmetric, azimuthal flow within the toroidal rotary seal of the IBM 2997 continuous flow cell separator and the implications.

    abstract：:Continuous flow blood fraction separators are used to facilitate the removal of specific blood components for donation or for certain medical procedures. Problems with one such device, the IBM 2997 Blood Processor, have been noted in a number of independent investigations. A key feature of this particular unit is a ce...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/0021-9290(86)90163-6

    authors： Harvey CB,O'Rear EA

    更新日期：1986-01-01 00:00:00

  • A numerical simulation of mechanical heart valve closure fluid dynamics.

    abstract：:A computational fluid dynamics model for the analysis of the bileaflet mechanical heart valve closure process is presented. The objective of the study is to demonstrate the ability of the numerical model to simulate the leaflet motion during the closing phase in order to investigate the closure fluid dynamics and to e...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/s0021-9290(02)00056-8

    authors： Lai YG,Chandran KB,Lemmon J

    更新日期：2002-07-01 00:00:00

  • Geometric and kinematic modelling of a human costal slice.

    abstract：:More and more powerful calculation methods are being used in the modelization of the human thorax, and considering the progress made in the domain of numerical analysis, this modelization is naturally being oriented toward the utilization of finite element methods. However, thoracic models are usually based on extreme...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/0021-9290(91)90179-q

    authors： Minotti P,Lexcellent C

    更新日期：1991-01-01 00:00:00

  • Biomedical microfluidic devices by using low-cost fabrication techniques: A review.

    abstract：:One of the most popular methods to fabricate biomedical microfluidic devices is by using a soft-lithography technique. However, the fabrication of the moulds to produce microfluidic devices, such as SU-8 moulds, usually requires a cleanroom environment that can be quite costly. Therefore, many efforts have been made t...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章,评审

    doi：10.1016/j.jbiomech.2015.11.031

    authors： Faustino V,Catarino SO,Lima R,Minas G

    更新日期：2016-07-26 00:00:00

  • Impact responses of the cervical spine: A computational study of the effects of muscle activity, torso constraint, and pre-flexion.

    abstract：:Cervical spine injuries continue to be a costly societal problem. Future advancements in injury prevention depend on improved physical and computational models, which are predicated on a better understanding of the neck response during dynamic loading. Previous studies have shown that the tolerance of the neck is depe...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2016.01.006

    authors： Nightingale RW,Sganga J,Cutcliffe H,Bass CR

    更新日期：2016-02-29 00:00:00

  • Numerical simulations of the pulsating flow of cerebrospinal fluid flow in the cervical spinal canal of a Chiari patient.

    abstract：:The flow of cerebrospinal fluid (CSF) in a patient-specific model of the subarachnoid space in a Chiari I patient was investigated using numerical simulations. The pulsating CSF flow was modeled using a time-varying velocity pulse based on peak velocity measurements (diastole and systole) derived from a selection of p...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2013.12.023

    authors： Helgeland A,Mardal KA,Haughton V,Reif BA

    更新日期：2014-03-21 00:00:00

  • Uncertainty quantification of wall shear stress in intracranial aneurysms using a data-driven statistical model of systemic blood flow variability.

    abstract：:Adverse wall shear stress (WSS) patterns are known to play a key role in the localisation, formation, and progression of intracranial aneurysms (IAs). Complex region-specific and time-varying aneurysmal WSS patterns depend both on vascular morphology as well as on variable systemic flow conditions. Computational fluid...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2016.10.005

    authors： Sarrami-Foroushani A,Lassila T,Gooya A,Geers AJ,Frangi AF

    更新日期：2016-12-08 00:00:00

  • Identification of key events in baseball hitting using inertial measurement units.

    abstract：:Quantification of baseball hitting mechanics under game conditions help players to become successful batters and prevent injuries. Inertial measurement units (IMUs) can measure motion without any spatial restriction and are thus becoming a popular tool to investigate sports biomechanics. Biomechanical analysis of hitt...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2019.02.001

    authors： Punchihewa NG,Yamako G,Fukao Y,Chosa E

    更新日期：2019-04-18 00:00:00

  • A state-space analysis of mechanical energy generation, absorption, and transfer during pedaling.

    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

    pub_type： 杂志文章

    doi：10.1016/0021-9290(95)00011-9

    authors： Fregly BJ,Zajac FE

    更新日期：1996-01-01 00:00:00

  • An improved method to assess torsional properties of rodent long bones.

    abstract：:Torsion is an important testing modality commonly used to calculate structural properties of long bones. However, the effects of size and geometry must be excluded from the overall structural response in order to compare material properties of bones of different size, age and species. We have developed a new method to...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2009.04.019

    authors： Nazarian A,Entezari V,Vartanians V,Müller R,Snyder BD

    更新日期：2009-08-07 00:00:00

  • Biomechanical analyses of stair-climbing while dual-tasking.

    abstract：:Stair-climbing while doing a concurrent task like talking or holding an object is a common activity of daily living which poses high risk for falls. While biomechanical analyses of overground walking during dual-tasking have been studied extensively, little is known on the biomechanics of stair-climbing while dual-tas...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2015.02.024

    authors： Vallabhajosula S,Tan CW,Mukherjee M,Davidson AJ,Stergiou N

    更新日期：2015-04-13 00:00:00

  • The influence of center-of-mass movements on the variation in the structure of human postural sway.

    abstract：:The present article investigates the influence of center-of-mass movements on the variation of the structure in human postural sway. Twelve healthy younger persons performed 60s quiet standing, 60s relaxed standing, and 10 min relaxed standing on two force plates. Center-of-pressure (CoP) and gravitational line (GL) p...

    journal_title：Journal of biomechanics

    pub_type： 临床试验,杂志文章

    doi：10.1016/j.jbiomech.2012.10.016

    authors： Ihlen EA,Skjæret N,Vereijken B

    更新日期：2013-02-01 00:00:00

  • Comparison of blood particle deposition models for non-parallel flow domains.

    abstract：:Adhesions of monocytes and platelets to a vascular surface, particularly in regions of flow stagnation, recirculation, and reattachment, are a significant initial event in a broad spectrum of particle-wall interactions that significantly influence the formation of stenotic lesions and mural thrombi. A number of approx...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/s0021-9290(02)00434-7

    authors： Worth Longest P,Kleinstreuer C

    更新日期：2003-03-01 00:00:00

  • The effect of walking speed on local dynamic stability is sensitive to calculation methods.

    abstract：:Local dynamic stability has been assessed by the short-term local divergence exponent (λS), which quantifies the average rate of logarithmic divergence of infinitesimally close trajectories in state space. Both increased and decreased local dynamic stability at faster walking speeds have been reported. This might pert...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2014.09.020

    authors： Stenum J,Bruijn SM,Jensen BR

    更新日期：2014-11-28 00:00:00

  • Experimental measurement and quantification of frictional contact between biological surfaces experiencing large deformation and slip.

    abstract：:Interactions between contacting biological surfaces may play significant roles in physiological and pathological processes. Theoretical models have described some special cases of contact, using one or more simplifying assumptions. Experimental quantification of contact could help to validate theoretical analyses. The...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2008.01.006

    authors： Gratz KR,Sah RL

    更新日期：2008-01-01 00:00:00

  • Comparison between in vivo and theoretical bite performance: using multi-body modelling to predict muscle and bite forces in a reptile skull.

    abstract：:In biomechanical investigations, geometrically accurate computer models of anatomical structures can be created readily using computed-tomography scan images. However, representation of soft tissue structures is more challenging, relying on approximations to predict the muscle loading conditions that are essential in ...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2010.05.037

    authors： Curtis N,Jones ME,Lappin AK,O'Higgins P,Evans SE,Fagan MJ

    更新日期：2010-10-19 00:00:00

  • Simultaneous shear and pressure sensor array for assessing pressure and shear at foot/ground interface.

    abstract：:Foot ulceration is a diabetic complication estimated to result in over $1 billion worth of medical expenses per year in the United States alone. This multifaceted problem involves the response of plantar soft tissue to both external forces applied to the epidermis and internal changes such as vascular supply and neuro...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2005.10.001

    authors： Mackey JR,Davis BL

    更新日期：2006-01-01 00:00:00

  • Dynamic stability of individuals with transtibial amputation walking in destabilizing environments.

    abstract：:Lower limb amputation substantially disrupts motor and proprioceptive function. People with lower limb amputation experience considerable impairments in walking ability, including increased fall risk. Understanding the biomechanical aspects of the gait of these patients is crucial in improving their gait function and ...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2014.02.033

    authors： Beurskens R,Wilken JM,Dingwell JB

    更新日期：2014-05-07 00:00:00

  • Mechanical properties of the tibia from chickens with idiopathic scoliosis.

    abstract：:The tibia from six-week old chickens that develop idiopathic scoliosis were studied with stress relaxation experiments and torsional strength testing. Most parameters observed did not show any significant differences between tibias obtained from chickens with scoliosis and tibias from the control birds; however, the r...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/0021-9290(83)90046-5

    authors： Riggins RS,Lewis DA,Benson DR,McCarrey JR,Franti CE

    更新日期：1983-01-01 00:00:00

  • Theoretical study of intracellular stress fiber orientation under cyclic deformation.

    abstract：:We studied stress fiber orientation under a wide range of uniaxial cyclic deformations. We devised and validated a hypothesis consisting of two parts, as follows: (1) a stress fiber aligns to avoid a mechanical stimulus in the fiber direction under cyclic deformation. This means that, among all allowable directions, a...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/s0021-9290(00)00114-7

    authors： Yamada H,Takemasa T,Yamaguchi T

    更新日期：2000-11-01 00:00:00

  • Hemiarthroplasty of hip joint: An experimental validation using porcine acetabulum.

    abstract：:Biphasic properties of articular cartilage allow it to be an excellent bearing material and have been studied through several simplified experiments as well as finite element modelling. However, three-dimensional biphasic finite element (FE) models of the whole joint are rare. The current study was carried out to expe...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2011.02.140

    authors： Pawaskar SS,Grosland NM,Ingham E,Fisher J,Jin Z

    更新日期：2011-05-17 00:00:00

  • Reconstruction of proximal humeral fractures without screws using a reinforced bone substitute.

    abstract：:Multi-fragment fractures are still a challenge: current clinical practice relies on plates and screws. Treatment of fractures of the proximal humerus has the intra-operative risk of articular damage when inserting multiple screws. Distal-varus collapse of the head is a frequent complication in osteoporotic patients. T...

    journal_title：Journal of biomechanics

    pub_type： 杂志文章

    doi：10.1016/j.jbiomech.2020.110138

    authors： Cristofolini L,Ruspi ML,Marras D,Cavallo M,Guerra E

    更新日期：2021-01-22 00:00:00