Abstract：
:Humans use visual optic flow to regulate average walking speed. Among many possible strategies available, healthy humans walking on motorized treadmills allow fluctuations in stride length (Ln) and stride time (Tn) to persist across multiple consecutive strides, but rapidly correct deviations in stride speed (Sn=Ln/Tn) at each successive stride, n. Several experiments verified this stepping strategy when participants walked with no optic flow. This study determined how removing or systematically altering optic flow influenced peoples' stride-to-stride stepping control strategies. Participants walked on a treadmill with a virtual reality (VR) scene projected onto a 3m tall, 180° semi-cylindrical screen in front of the treadmill. Five conditions were tested: blank screen ("BLANK"), static scene ("STATIC"), or moving scene with optic flow speed slower than ("SLOW"), matched to ("MATCH"), or faster than ("FAST") walking speed. Participants took shorter and faster strides and demonstrated increased stepping variability during the BLANK condition compared to the other conditions. Thus, when visual information was removed, individuals appeared to walk more cautiously. Optic flow influenced both how quickly humans corrected stride speed deviations and how successful they were at enacting this strategy to try to maintain approximately constant speed at each stride. These results were consistent with Weber's law: healthy adults more-rapidly corrected stride speed deviations in a no optic flow condition (the lower intensity stimuli) compared to contexts with non-zero optic flow. These results demonstrate how the temporal characteristics of optic flow influence ability to correct speed fluctuations during walking.
journal_name
Gait Posturejournal_title
Gait & postureauthors
Salinas MM,Wilken JM,Dingwell JBdoi
10.1016/j.gaitpost.2017.05.002subject
Has Abstractpub_date
2017-09-01 00:00:00pages
15-20eissn
0966-6362issn
1879-2219pii
S0966-6362(17)30184-4journal_volume
57pub_type
杂志文章相关文献
GAIT & POSTURE文献大全abstract：:Gait summary measures have been developed as a convenient method to communicate overall gait pathology. These measures are primarily used in the context of paediatric cerebral palsy and their use remains largely untested in other disability groups. This study assessed the suitability of gait summary measures for use w...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2011.09.013
更新日期：2012-02-01 00:00:00
abstract：:This study aimed to investigate the manner in which healthy individuals execute robust whole body movements despite unstable body structure from the perspective of perception-action coupling. Twelve healthy adults performed sit-to-stand (STS) movements under conditions of constrained visual and somatic senses. During ...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2012.01.011
更新日期：2012-05-01 00:00:00
abstract：BACKGROUND:Existing analytical approaches used to measure free-living stepping cadence (steps per minute; spm) characterize stepping two-ways: 1) 60 s epochs without considering time spent stepping during the epoch (step accumulation; SA), or 2) a bout-based analysis that considers both number of steps and time spent s...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2020.04.014
更新日期：2020-06-01 00:00:00
abstract：:Confidence in 3D multi-segment foot models has been limited by a lack of repeatability data, particularly in older populations that may display unique functional foot characteristics. This study aimed to determine the intra and inter-observer repeatability of stance phase kinematic data from a multi-segment foot model...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2012.11.010
更新日期：2013-06-01 00:00:00
abstract：:Bone sarcomas are the fourth most common cancer in individuals under 25 years. Limb salvage procedures have become increasingly popular for the treatment of osteosarcomas as they have functional and psychological benefits over traditional amputative procedures. The purpose of this paper was to evaluate kinematic and k...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2009.08.234
更新日期：2009-11-01 00:00:00
abstract：BACKGROUND:Pain in the lower extremities is common among blue-collar workers, with prolonged static standing as a potential risk factor. However, little is known about the association between diurnal accelerometer measures of static standing and pain in the lower extremities, and the potential importance of temporal pa...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2018.10.006
更新日期：2019-01-01 00:00:00
abstract：:Motor output in activities such as walking and hopping is suggested to be mediated neurally by purported stretch reflex augmentation of muscle output. Reflex EMG activity during these tasks has been frequently investigated in the soleus muscle; with alterations in reflex amplitude being associated with changes in hip ...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2013.05.007
更新日期：2013-09-01 00:00:00
abstract：:The first aim of this study was to analyse the effect of elite training, linked to expertise, in gymnastics on postural performance and control. For this purpose, body sway of expert gymnasts was compared to other sportsmen, non-experts and non-gymnasts, in two different postures: bipedal (easy and unspecific to gymna...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2007.01.004
更新日期：2008-01-01 00:00:00
abstract：:In this observational case-control study we aimed to determine whether altered arm postures in children with unilateral CP (uniCP) are related to gait instability in a specific direction. Antero-posterior and medio-lateral Foot Placement Estimator instability measures and arm posture measures (vertical and antero-post...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2016.06.033
更新日期：2016-09-01 00:00:00
abstract：:Selecting a specific foot placement strategy to perform walking maneuvers requires the management of several competing factors, including: maintaining stability, positioning oneself to actively generate impulses, and minimizing mechanical energy requirements. These requirements are unlikely to be independent. Our purp...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2016.11.034
更新日期：2017-02-01 00:00:00
abstract：:Regional plantar pressures during stair walking may be injurious in at risk populations. However, limited data are available examining the reliability of plantar pressure data collected during stair walking. The aims of this study were three fold; to assess the reliability of the plantar pressure data recorded during ...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2012.03.006
更新日期：2012-06-01 00:00:00
abstract：:Differences in the kinematics and kinetics of overground running have been reported between boys with and without developmental coordination disorder (DCD). This study compared the kinematics of overground and treadmill running in children with and without DCD to determine whether any differences in technique are main...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2014.05.054
更新日期：2014-07-01 00:00:00
abstract：BACKGROUND:Wearable inertial sensors have been shown to provide valid mean gait characteristics assessments, however, assessment of variability is less convincingly established. RESEARCH QUESTION:What level of concurrent validity, and session-to-session reliability does an ankle-worn inertial measurement unit (IMU)-ba...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2019.08.006
更新日期：2019-10-01 00:00:00
abstract：:Falls during stair descent are a serious problem and can lead to accidental death. Inappropriate foot placement on, and clearance over, steps have been identified as causes for falls on stairs. This study investigated a new method for measuring placement and clearance during stair descent in 10 healthy young subjects....
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2010.12.004
更新日期：2011-03-01 00:00:00
abstract：INTRODUCTION:In this paper, the Gait Deviation Index (GDI) was used as a convenient method to evaluate pre-to-postoperative gait pattern changes after total hip arthroplasty and identify factors which might be predictive of outcome. DESIGN:Three-dimensional gait data from a randomized clinical trial was used to determ...
journal_title：Gait & posture
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.gaitpost.2015.02.009
更新日期：2015-06-01 00:00:00
abstract：BACKGROUND:Running with body weight support (BWS) has been used for physical fitness enhancement. Nevertheless, gait mechanics of running with BWS is not fully understood. RESEARCH QUESTION:We investigated influence of stride frequency manipulation on muscle activity during running at various BWS conditions. METHODS:...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2018.02.010
更新日期：2018-03-01 00:00:00
abstract：:The objective was to analyze the compensatory effect of the pelvis and lower extremities on sagittal spinal malalignment in patients with pelvic incidence (PI) and lumbar lordosis (LL) mismatch. A series of parameters including PI, LL, PI-LL, thoracic kyphosis (TK), pelvic tilt (PT), sacral slope (SS), knee flexion an...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2017.04.041
更新日期：2017-07-01 00:00:00
abstract：:Multiscale entropy (MSE) has been applied in biomechanics to evaluate gait stability during human gait and was found to be a promising method for evaluating fall risk in elderly and/or pathologic subjects. The hypothesis of this work is that gait complexity is a relevant parameter of gait development during life, decr...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2016.04.001
更新日期：2016-06-01 00:00:00
abstract：BACKGROUND:The high energy cost of paraplegic walking using a reciprocating gait orthosis (RGO) is attributed to limited hip motion and excessive upper limb loading for support. To address the limitation, we designed the hip energy storage walking orthosis (HESWO) which uses a spring assembly on the pelvic shell to sto...
journal_title：Gait & posture
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.gaitpost.2017.05.022
更新日期：2017-09-01 00:00:00
abstract：:The effects of type (cognitive vs. motor) and difficulty level (easy vs. hard) of a concurrent task on walking were examined in 10 boys and 4 girls (age 4-6 years) with developmental coordination disorder (DCD) and 28 age- and gender-matched unaffected children. Each child performed free walking (single task), walking...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2008.08.003
更新日期：2009-02-01 00:00:00
abstract：:This work investigates the kinematic and electromyography (EMG) strategy used by the central nervous system (CNS) to keep equilibrium during anterior-posterior balance on seesaws with different degrees of instability. The movement of hip, knee, and ankle were reconstructed using a 3D motion-analysis system and the EMG...
journal_title：Gait & posture
pub_type： 临床试验,杂志文章
doi：10.1016/j.gaitpost.2004.11.020
更新日期：2006-01-01 00:00:00
abstract：:Tripping over obstacles and imbalance during gait were reported as two of the most common causes of falls in the elderly. Imbalance of the whole body during obstacle crossing may cause inappropriate movement of the lower extremities and result in foot-obstacle contact. Thus, this study was performed to investigate the...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/s0966-6362(00)00087-4
更新日期：2001-02-01 00:00:00
abstract：:Informed clinical decision making for femoral and/or tibial de-rotation osteotomies requires accurate measurement of patient function through gait analysis and anatomy through physical examination of bony torsions. Validity of gait analysis has been extensively studied; however, controversy remains regarding the accur...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2013.05.020
更新日期：2014-01-01 00:00:00
abstract：:Functional near-infrared spectroscopy (fNIRS) is a portable, non-invasive, brain imaging technology that uses low levels of non-ionizing light to record changes in cerebral blood flow in the brain through optical sensors placed on the surface of the scalp. These signals are recorded via flexible fiber optic cables, wh...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2011.10.007
更新日期：2012-03-01 00:00:00
abstract：:The study examined the effect of aging adults (young: 18-26 years vs. old: 66-73 years) on the recovery of postural stability from taking a single volitional step that varied in direction (forward, backward, sideways) onto force platforms. The recovery of postural stability (as indexed by an exponential decay function...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2014.08.002
更新日期：2014-09-01 00:00:00
abstract：:Most individuals can use different movement and muscle recruitment patterns to perform a stated task but often only one pattern is selected which optimizes an unknown global objective given the individual's neuromusculoskeletal characteristics. Patients with fibromyalgia syndrome (FS), characterized by their chronic p...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2004.09.007
更新日期：2005-11-01 00:00:00
abstract：BACKGROUND:Altered gait mechanics are frequently reported in individuals with chronic ankle instability (CAI), and increasing information suggests proximal muscle adaptations occur in this population. Ultrasound imaging (USI) offers a visual means to evaluate muscle activity during movement, and overcomes limitations o...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2019.04.007
更新日期：2019-06-01 00:00:00
abstract：:Kinematic multi-segment foot models have seen increased use in clinical and research settings, but the addition of kinetics has been limited and hampered by measurement limitations and modeling assumptions. In this second of two companion papers, we complete the presentation and analysis of a three segment kinetic foo...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2011.11.012
更新日期：2012-04-01 00:00:00
abstract：:This study proposed a child-friendly measurement procedure for the three-dimensional analysis of upper limb movements, based on a comprehensive movement protocol. Within and between session reliability was tested in a group of 10 typically developing children (TDC) (mean age 10.3±3.2 years). The movement protocol was ...
journal_title：Gait & posture
pub_type： 杂志文章
doi：10.1016/j.gaitpost.2010.11.021
更新日期：2011-02-01 00:00:00
abstract：:The purpose of this study was to describe the changes in muscle activation patterns using surface electromyography (sEMG) during walking in patients with cerebral palsy (CP), before and after hamstring lengthening. In the current clinical use of sEMG during walking in CP for pre-operative planning, various authors hav...
journal_title：Gait & posture
pub_type： 杂志文章,多中心研究
doi：10.1016/S0966-6362(03)00092-4
更新日期：2004-08-01 00:00:00
