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Human Movement Science

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https://www.readbyqxmd.com/read/28222902/hybrid-is-not-a-dirty-word-commentary-on-wade-and-kazeck-2017
#1
Peter H Wilson, Karen Caeyenberghs, Deborah Dewey, Bouwien Smits-Engelsman, Bert Steenbergen
No abstract text is available yet for this article.
February 17, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28222343/motor-skills-in-kindergarten-internal-structure-cognitive-correlates-and-relationships-to-background-variables
#2
Nicole Oberer, Venera Gashaj, Claudia M Roebers
The present study aimed to contribute to the discussion about the relation between motor coordination and executive functions in preschool children. Specifically, the relation between gross and fine motor skills and executive functions as well as the relation to possible background variables (SES, physical activity) were investigated. Based on the data of N=156 kindergarten children the internal structure of motor skills was investigated and confirmed the theoretically assumed subdivision of gross and fine motor skills...
February 17, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28222342/concussion-is-associated-with-altered-preparatory-postural-adjustments-during-gait-initiation
#3
Cailbhe Doherty, Liang Zhao, John Ryan, Yusuke Komaba, Akihiro Inomata, Brian Caulfield
Gait initiation is a useful surrogate measure of supraspinal motor control mechanisms but has never been evaluated in a cohort following concussion. The aim of this study was to quantify the preparatory postural adjustments (PPAs) of gait initiation (GI) in fifteen concussion patients (4 females, 11 males) in comparison to a group of fifteen age- and sex-matched controls. All participants completed variants of the GI task where their dominant and non-dominant limbs as the 'stepping' and 'support' limbs. Task performance was quantified using the centre of pressure (COP) trajectory of each foot (computed from a force plate) and a surrogate of the centre of mass (COM) trajectory (estimated from an inertial measurement unit placed on the sacrum)...
February 17, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28219842/differences-in-the-activation-and-co-activation-ratios-of-the-four-subdivisions-of-trapezius-between-genders-following-a-computer-typing-task
#4
Kimberly A Szucs, Megan Molnar
The aim of this study was to provide a description of gender differences of the activation patterns of the four subdivisions of the trapezius (clavicular, upper, middle, lower) following a 60min computer work task. Surface EMG was collected from these subdivisions from 21 healthy subjects during bilateral arm elevation pre-/post- task. Subjects completed a standardized 60min computer work task at a standard, ergonomic workstation. Normalized activation and activation ratios of each trapezius subdivision were compared between genders and condition with repeated measures ANOVAs...
February 17, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28213152/central-neuronal-motor-behaviour-in-skilled-and-less-skilled-novices-approaching-sports-specific-movement-techniques
#5
Tobias Vogt, Kouki Kato, Stefan Schneider, Stefan Türk, Kazuyuki Kanosue
Research on motor behavioural processes preceding voluntary movements often refers to analysing the readiness potential (RP). For this, decades of studies used laboratory setups with controlled sports-related actions. Further, recent applied approaches focus on athlete-non-athlete comparisons, omitting possible effects of training history on RP. However, RP preceding real sport-specific movements in accordance to skill acquisition remains to be elucidated. Therefore, after familiarization 16 right-handed males with no experience in archery volunteered to perform repeated sports-specific movements, i...
February 14, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28199903/the-effect-of-variable-rest-intervals-and-chronic-ankle-instability-on-triplanar-ankle-motion-during-performance-of-the-star-excursion-balance-test
#6
Yong Ung Kwon, D S Blaise Williams
Inadequate rest intervals may contribute to impaired performance during functional tests. However, the effect of different rest intervals on performance of the SEBT in individuals with and without CAI is not known. Our purposes were to determine whether different rest intervals impact ankle kinematics during the SEBT and whether there differences between those two populations. 24 controls and 24 CAI completed 3 trials in 3 reach directions (anteromedial; AM, medial; M, posteromedial; PM). The order of rest intervals and reach distance were randomized and counterbalanced...
February 12, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28189892/older-adults-exhibit-altered-motor-coordination-during-an-upper-limb-object-transport-task-requiring-a-lateral-change-in-support
#7
Andrew H Huntley, John L Zettel, Lori Ann Vallis
Investigating an ecologically relevant upper limb task, such as manually transporting an object with a concurrent lateral change in support (sidestepping alongside a kitchen counter), may provide greater insight into potential deficits in postural stability, variability and motor coordination in older adults. Nine healthy young and eleven older, community dwelling adults executed an upper limb object transport task requiring a lateral change in support in two directions at two self-selected speeds, self-paced and fast-paced...
February 9, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28187353/towards-an-ecologically-grounded-functional-practice-in-rehabilitation
#8
Daniela Virgínia Vaz, Paula Lanna Silva, Marisa Cotta Mancini, Claudia Carello, Jeffrey Kinsella-Shaw
According to the International Classification of Functioning, Disability and Health, effective rehabilitation requires interventions that go beyond minimizing pathological conditions and associated symptoms. The scope of practice must include promoting an individual's activity within relevant contexts. We argue that best practice requires decisions that are not only evidence-based but also theory-based. Perception and action theories are essential for interpreting evidence and clinical phenomena as well as for developing new interventions...
February 7, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28182970/reconstruction-of-human-swing-leg-motion-with-passive-biarticular-muscle-models
#9
Maziar Ahmad Sharbafi, Aida Mohammadi Nejad Rashty, Christian Rode, Andre Seyfarth
Template models, which are utilized to demonstrate general aspects in human locomotion, mostly investigate stance leg operation. The goal of this paper is presenting a new conceptual walking model benefiting from swing leg dynamics. Considering a double pendulum equipped with combinations of biarticular springs for the swing leg beside spring-mass (SLIP) model for the stance leg, a novel SLIP-based model, is proposed to explain human-like leg behavior in walking. The action of biarticular muscles in swing leg motion helps represent human walking features, like leg retraction, ground reaction force and generating symmetric walking patterns, in simulations...
February 6, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28182969/experience-level-influences-the-effect-of-attentional-focus-on-sprint-performance
#10
Nicklaas C Winkelman, Kenneth P Clark, Larry J Ryan
Two experiments evaluated the influence of attentional focus on 10-meter sprint time and start kinetics in a group of collegiate soccer players and highly experienced sprinters. In Experiment 1, the collegiate soccer players were asked to perform 10-meter sprints under an external focus condition, an internal focus condition and a control condition. For the 10-meter sprint time, the results showed that both the external focus and control conditions resulted in significantly faster sprint times than the internal focus condition...
February 6, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28182968/measuring-postural-control-during-mini-squat-posture-in-men-with-early-knee-osteoarthritis
#11
M Petrella, K Gramani-Say, P R M S Serrão, G C Lessi, J A Barela, R P Carvalho, S M Mattiello
Studies have suggested a compromised postural control in individuals with knee osteoarthritis (OA) evidenced by larger and faster displacement of center of pressure (COP). However, quantification of postural control in the mini-squat posture performed by patients with early knee OA and its relation to muscle strength and self-reported symptoms have not been investigated. The main aim of this cross-sectional, observational, controlled study was to determine whether postural control in the mini-squat posture differs between individuals with early knee OA and a control group (CG) and verify the relation among knee extensor torque (KET) and self-reported physical function, stiffness and pain...
February 6, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28153568/the-relationship-between-motor-performance-and-parent-rated-executive-functioning-in-3-to-5-year-old-children-what-is-the-role-of-confounding-variables
#12
Suzanne Houwen, Gerda van der Veer, Jan Visser, Marja Cantell
It is generally agreed that motor performance and executive functioning (EF) are intertwined. As the literature on this issue concerning preschool children is scarce, we examined the relationship between motor performance and parent-rated EF in a sample of 3- to 5-year-old children with different levels of motor skill proficiency, while controlling for age, gender, socio-economic status (SES), and attention-deficit-hyperactivity disorder (ADHD) symptomatology. EF was reported by parents of 153 children (mean age 4years 1months, SD 8months; 75 male) by means of the Behaviour Rating Inventory of Executive Function-Preschool version (BRIEF-P)...
January 30, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28135584/athletic-background-is-related-to-superior-trunk-proprioceptive-ability-postural-control-and-neuromuscular-responses-to-sudden-perturbations
#13
Grace O Glofcheskie, Stephen H M Brown
Trunk motor control is essential for athletic performance, and inadequate trunk motor control has been linked to an increased risk of developing low back and lower limb injury in athletes. Research is limited in comparing relationships between trunk neuromuscular control, postural control, and trunk proprioception in athletes from different sporting backgrounds. To test for these relationships, collegiate level long distance runners and golfers, along with non-athletic controls were recruited. Trunk postural control was investigated using a seated balance task...
January 28, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28142073/attentional-focusing-instructions-influence-quadriceps-activity-characteristics-but-not-force-production-during-isokinetic-knee-extensions
#14
David C Marchant, Matt Greig
The attentional focus emphasised in verbal instruction influences movement and muscle recruitment characteristics, with an external focus (onto movement effects) typically benefiting performance. However, contrasting findings suggest either a selective isolation or spreading activation effect on associated muscles as a result of internally focused instruction (movement characteristics). In the present experiment, participants completed maximal isokinetic concentric leg extension exercise using internally (muscle specific: vastus medialis oblique) or externally (outcome specific) focused instructions...
January 27, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28119210/comparison-of-the-trunk-pelvis-and-lower-extremities-sagittal-plane-inter-segmental-coordination-and-variability-during-walking-in-persons-with-and-without-chronic-low-back-pain
#15
Samaneh Ebrahimi, Fahimeh Kamali, Mohsen Razeghi, Seyyed Arash Haghpanah
Inter-segmental coordination can be influenced by chronic low back pain (CLBP). The sagittal plane lower extremities inter-segmental coordination pattern and variability, in conjunction with the pelvis and trunk, were assessed in subjects with and without non-specific CLBP during free-speed walking. Kinematic data were collected from 10 non-specific CLBP and 10 non-CLBP control volunteers while the subjects were walking at their preferred speed. Sagittal plane time-normalized segmental angles and velocities were used to calculate continuous relative phase for each data point...
January 21, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28110146/enhanced-arm-swing-alters-interlimb-coordination-during-overground-walking-in-individuals-with-traumatic-brain-injury
#16
Ksenia I Ustinova, Joseph E Langenderfer, Nilanthy Balendra
The current study investigated interlimb coordination in individuals with traumatic brain injury (TBI) during overground walking. The study involved 10 participants with coordination, balance, and gait abnormalities post-TBI, as well as 10 sex- and age-matched healthy control individuals. Participants walked 12m under two experimental conditions: 1) at self-selected comfortable walking speeds; and 2) with instructions to increase the amplitude and out-of-phase coordination of arm swinging. The gait was assessed with a set of spatiotemporal and kinematic parameters including the gait velocity, step length and width, double support time, lateral displacement of the center of mass, the amplitude of horizontal trunk rotation, and angular motions at shoulder and hip joints in sagittal plane...
January 19, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28109545/tactile-localization-performance-in-children-with-developmental-coordination-disorder-dcd-corresponds-to-their-motor-skill-and-not-their-cognitive-ability
#17
Joanne S Johnston, Jannath Begum Ali, Elisabeth L Hill, Andrew J Bremner
When localizing touches to the hands, typically developing children and adults show a "crossed hands effect" whereby identifying which hand received a tactile stimulus is less accurate when the hands are crossed than uncrossed. This demonstrates the use of an external frame of reference for locating touches to one's own body. Given that studies indicate that developmental vision plays a role in the emergence of external representations of touch, and reliance on vision for representing the body during action is atypical in developmental coordination disorder (DCD), we investigated external spatial representations of touch in children with DCD using the "crossed hands effect"...
January 18, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28103470/gender-differences-in-asymmetrical-limb-support-patterns-between-subjects-with-and-without-recurrent-low-back-pain
#18
Paul S Sung, J Tim Zipple, Pamela Danial
New insight regarding limb-dominance effects on temporal-spatial gait parameters is needed to further investigate subjects with recurrent low back pain (LBP). Although an asymmetrical gait pattern was found to reflect natural functional differences, there is a lack of information regarding gender differences on dominant limb support patterns in subjects with LBP. The purpose of this study was to investigate temporal-spatial gait parameters based on limb dominance and gender between subjects with and without LBP...
January 16, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28103469/transitions-of-postural-coordination-as-a-function-of-frequency-of-the-moving-support-platform
#19
Aviroop Dutt-Mazumder, Karl Newell
This study was set-up to investigate the multi-segmental organization of human postural control in a dynamic balance task. The focus was on the coupling between the center of mass (CoM) and center of pressure (CoP) as a candidate collective variable that supports maintaining balance on a sinusoidal oscillating platform in the medial-lateral (ML) plane and was continuously scaled up and then down across a frequency range from 0.2Hz to 1.2Hz. The CoM-CoP coordination changed from in-phase to anti-phase and anti-phase to in-phase at a critical frequency (∼0...
January 16, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28088660/processes-of-anticipatory-postural-adjustment-and-step-movement-of-gait-initiation
#20
Hiroki Mizusawa, Yasutomo Jono, Yasuyuki Iwata, Atsushi Kinoshita, Koichi Hiraoka
The purpose of this study was to elucidate whether the anticipatory postural adjustment (APA) and focal step movement of gait initiation are produced as a single process or different processes and whether the APA receives an inhibitory drive from the ongoing stop process of gait initiation. Healthy humans initiated gait in response to a first visual cue that instructed the initial swing leg. In some trials, a switch or stop cue was also provided after the first cue. When the stop cue was provided, participants withheld gait initiation...
January 13, 2017: Human Movement Science
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