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Human Movement Science

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https://www.readbyqxmd.com/read/29448162/cognitive-motor-dual-task-interference-modulates-mediolateral-dynamic-stability-during-gait-in-post-stroke-individuals
#1
R Tisserand, S Armand, G Allali, A Schnider, S Baillieul
Gait asymmetry and dynamic balance impairments observed in post-stroke individuals increase their risk of fall. Moreover, walking while performing a cognitive task (i.e. dual-task) disturbs the control of balance in post-stroke individuals. Here we investigated the mediolateral dynamic stability in twenty-two community-dwelling participants (12 post-strokes and 10 healthy controls) while walking in single-task (normal gait) and four different dual-tasks (cognitive-motor interference). Positions of the extrapolated center of mass and mediolateral widths of both margin of stability and base of support were extracted from 35 marker trajectories...
February 12, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29448161/how-does-lower-limb-dominance-influence-postural-control-movements-during-single-leg-stance
#2
Arunee Promsri, Thomas Haid, Peter Federolf
The main purposes of the current study were to examine bilateral asymmetry in postural control during single-leg standing between the dominant and non-dominant legs using a novel analysis approach based on principal component analysis (PCA). It was hypothesized that the asymmetry might manifest as differences in the coordinative structure (control strategies), or as differences in the frequency or regularity of corrective interventions of the motor control system. The static and dynamic leg dominance of 26 active young adults (14 males and 12 females) was determined from their preferred leg for dynamic and for static tasks...
February 12, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29448160/multi-plane-multi-joint-lower-extremity-support-moments-during-a-rapid-deceleration-task-implications-for-knee-loading
#3
Jeffery T Podraza, Scott C White, Dan K Ramsey
The principle of lower limb support, and the contribution of hip, knee and ankle moments to an overall limb support strategy for an impact-like, rapid deceleration movement may help explain individual moment magnitude changes, thereby providing insight into how injury might occur or be avoided. Twenty subjects performed single limb, impact-like, deceleration landings at three different knee flexion angles in the range of 0-25, 25-50 and 50-75°. Kinematic and kinetic measures identified hip, knee and ankle moment contribution to limb support moments (LSMs) in three planes...
February 12, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29438912/spatial-and-temporal-analysis-center-of-pressure-displacement-during-adolescence-clinical-implications-of-developmental-changes
#4
Catherine Quatman-Yates, Scott Bonnette, Resmi Gupta, Jason A Hugentobler, Shari L Wade, Tracy A Glauser, Richard F Ittenbach, Mark V Paterno, Michael A Riley
This study aimed to provide insight into the development of postural control abilities in youth. A total of 276 typically developing adolescents (155 males, 121 females) with a mean age of 13.23 years (range of 7.11-18.80) were recruited for participation. Subjects performed two-minute quiet standing trials in bipedal stance on a force plate. Center of pressure (COP) trajectories were quantified using Sample Entropy (SampEn) in the anterior-posterior direction (SampEn-AP), SampEn in the medial-lateral direction (SampEn-ML), and Path Length (PL) measures...
February 10, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29438911/biomechanical-assessment-of-dynamic-balance-specificity-of-different-balance-tests
#5
Steffen Ringhof, Thorsten Stein
Dynamic balance is vitally important for most sports and activities of daily living, so the assessment of dynamic stability has become an important issue. In consequence, a large number of balance tests have been developed. However, it is not yet known whether these tests (i) measure the same construct and (ii) can differentiate between athletes with different balance expertise. We therefore studied three common dynamic balance tests: one-leg jump landings, Posturomed perturbations and simulated forward falls...
February 10, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29426038/effect-of-short-term-training-on-fine-motor-control-in-trigeminally-innervated-versus-spinally-innervated-muscles
#6
Hong Zhang, Abhishek Kumar, Xiaoping Luo, Krister Svensson, Mats Trulsson, Peter Svensson
We hypothesized that the trigeminally innervated jaw muscles and spinally innervated hand muscles would differ in the force control and muscle activity when similar fine motor training tasks are performed. Sixteen healthy volunteers performed six series (with ten trials each) of an oral fine motor task (OFMT) and a hand fine motor task (HFMT), in random order. The task was to hold-and-break a test material (5 cm spaghetti pasta) placed on the force transducer between either their anterior teeth (OFMT) or the thumb and the index finger (HFMT)...
February 6, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29408164/the-limits-of-aerial-techniques-for-producing-twist-in-forward-1%C3%A2-somersault-dives
#7
M R Yeadon, M J Hiley
An angle-driven computer simulation model of aerial movement was used to determine the maximum amount of twist that can be produced in a forward 1½ somersault dive from a three-metre springboard using various aerial twisting techniques. The segmental inertia parameters of an elite springboard diver were used in the simulations and lower bounds were placed on the durations of arm and hip angle changes based on recorded performances of twisting somersaults. A limiting dive was identified as that producing the largest possible whole number of twists...
February 1, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29408163/effects-of-motor-imagery-and-action-observation-on-hand-grip-strength-electromyographic-activity-and-intramuscular-oxygenation-in-the-hand-gripping-gesture-a-randomized-controlled-trial
#8
Alejandro Losana-Ferrer, Sergio Manzanas-López, Ferran Cuenca-Martínez, Alba Paris-Alemany, Roy La Touche
The aim of this study was to evaluate the effects of motor imagery and action observation combined with a hand grip strength program on the forearm muscles. Sixty subjects were selected and randomized into three groups: motor imagery (n = 20), action observation (n = 20), or a control group (n = 20). Outcome measures included hand grip strength, electromyographical activity and intramuscular oxygenation. The hand grip strength significantly increased in the motor imagery (p < .001) and action observation (p < ...
January 29, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29408162/sensory-and-motor-differences-in-autism-spectrum-conditions-and-developmental-coordination-disorder-in-children-a-cross-syndrome-study
#9
Penny Hannant, Sarah Cassidy, Rosaline Van de Weyer, Sophia Mooncey
Recent research has shown that Developmental coordination disorder (DCD) can present with some similar symptomology as Autism Spectrum Conditions (ASC). This paper therefore explored the similarities and differences in coordination and sensory responsivity between DCD and ASC. 77 children took part: 42 (35 male, 7 female) with ASC (ages 7-21: mean age 12.23 years), 26 (19 male, 7 female) with DCD (ages 7-21; mean age 11.07 years) and 9 (2 male, 7 female) with ASC and DCD (ages 8-15; mean age 12.27). All groups completed a battery of validated parent report measures online that included motor coordination (DCDQ), sensory responsivity (SPC-R) and social communication measures (AQ)...
January 26, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29353095/integration-of-visual-feedback-and-motor-learning-corticospinal-vs-corticobulbar-pathway
#10
Seoung Hoon Park, Agostina Casamento-Moran, Michele L Singer, Alayna E Ernster, Basma Yacoubi, Ianessa A Humbert, Evangelos A Christou
Although movement is controlled by different descending pathways, it remains unknown whether the integration of visual feedback and motor learning differs for movements controlled by different descending pathways. Here, we compare motor control and learning of the ankle joint and tongue because they are primarily controlled by the corticospinal and corticobulbar pathways, respectively. Twelve young adults (19.63 ± 2.11 years, 6 females) practiced a tracking task (combination of 0.02, 0.37, 0.5, and 1 Hz) with ankle dorsiflexion and with tongue elevation for 100 trials...
January 17, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29353094/effects-of-scaling-task-constraints-on-emergent-behaviours-in-children-s-racquet-sports-performance
#11
Anna Fitzpatrick, Keith Davids, Joseph A Stone
Manipulating task constraints by scaling key features like space and equipment is considered an effective method for enhancing performance development and refining movement patterns in sport. Despite this, it is currently unclear whether scaled manipulation of task constraints would impact emergent movement behaviours in young children, affording learners opportunities to develop relevant skills. Here, we sought to investigate how scaling task constraints during 8 weeks of mini tennis training shaped backhand stroke development...
January 17, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29353093/executive-functions-visual-motor-coordination-physical-fitness-and-academic-achievement-longitudinal-relations-in-typically-developing-children
#12
Nicole Oberer, Venera Gashaj, Claudia M Roebers
The present longitudinal study included different school readiness factors measured in kindergarten with the aim to predict later academic achievement in second grade. Based on data of N = 134 children, the predictive power of executive functions, visual-motor coordination and physical fitness on later academic achievement was estimated using a latent variable approach. By entering all three predictors simultaneously into the model to predict later academic achievement, significant effects of executive functions and visual-motor coordination on later academic achievement were found...
January 17, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29353091/adding-vibrotactile-feedback-to-a-myoelectric-controlled-hand-improves-performance-when-online-visual-feedback-is-disturbed
#13
Eitan Raveh, Sigal Portnoy, Jason Friedman
We investigated whether adding vibrotactile feedback to a myoelectric-controlled hand, when visual feedback is disturbed, can improve performance during a functional test. For this purpose, able-bodied subjects, activating a myoelectric-controlled hand attached to their right hand performed the modified Box & Blocks test, grasping and manipulating wooden blocks over a partition. This was performed in 3 conditions, using a repeated-measures design: in full light, in a dark room where visual feedback was disturbed and no auditory feedback - one time with the addition of tactile feedback provided during object grasping and manipulation, and one time without any tactile feedback...
January 17, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29353092/individual-and-dyadic-rope-turning-as-a-window-into-social-coordination
#14
Raoul Huys, Agnieszka Kolodziej, Julien Lagarde, Chlöé Farrer, Robert Darmana, Pier-Giorgio Zanone
The spontaneous and intentional movement coordination between peoples is well understood. Less is known about such interactions when the coordination is subordinate to the task and when the task involves, next to vision, mechanically induced haptic and kinesthetic coupling between dyadic partners. We therefore investigated dyadic jump rope turning. Fifteen dyadic pairs conjointly turned a jump rope to which five markers were equidistantly attached, and whose movements were recorded in 3D. In addition, each participant turned one side of the rope while the other side was quasi-fixed in an individual baseline condition...
January 16, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29351875/trunk-and-pelvic-dynamics-during-transient-turns-among-individuals-with-unilateral-traumatic-lower-limb-amputation
#15
Pawel R Golyski, Brad D Hendershot
Prior work has identified alterations in trunk-pelvic dynamics with lower limb amputation (LLA) during in-line walking; however, evaluations of other ambulatory tasks are limited. Turns are ubiquitous in daily life but can be challenging for individuals with LLA, prompting additional or unique proximal compensations when changing direction, which over time may lead to development of low back pain. We hypothesized such proximal kinematic differences between persons with and without LLA would exist in the sagittal and frontal planes...
January 16, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29338878/mostly-old-wine-in-new-bottles-reply-to-commentaries
#16
Michael G Wade
No abstract text is available yet for this article.
January 12, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29334675/effects-of-running-retraining-on-biomechanical-factors-associated-with-lower-limb-injury
#17
Marcus D Dunn, David B Claxton, Graham Fletcher, Jonathan S Wheat, David M Binney
Injury risk is an important concern for runners; however, limited evidence exists regarding changes to injury risk following running style retraining. Biomechanical factors, such as absolute peak free moment, knee abduction impulse, peak foot eversion and foot eversion excursion, have been shown to predict lower limb injury. The aim of this study was to assess the effects of Pose running retraining on biomechanical factors associated with lower limb running injury. Twenty uninjured recreational runners were pair-matched based on their five km run time performance and randomly assigned to control (n = 10) and intervention (three 2-h Pose running retraining sessions) groups (n = 10)...
January 12, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29334674/relationship-between-jumping-abilities-and-skeletal-muscle-architecture-of-lower-limbs-in-humans-systematic-review-and-meta-analysis
#18
J D Ruiz-Cárdenas, J J Rodríguez-Juan, J Ríos-Díaz
The aim of this study was to examine the influence of skeletal muscle architecture (SMA) features measured by 2-D ultrasonography on jumping performance in humans. A systematic review and meta-analysis was conducted, registry number: CRD42016043602. The scientific literature was systematically searched in eight databases, last run on March 14th, 2017. Cross-sectional studies focused on the association between SMA features and vertical jumping performance were selected. A random-effects model was used to analyze the influence of lower-limb SMA and maximal jump height...
January 12, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29331489/modulation-of-lower-extremity-joint-stiffness-work-and-power-at-different-walking-and-running-speeds
#19
Li Jin, Michael E Hahn
Locomotion task and speed changes affect dynamic joint function. Walking and running require different coordination patterns of lower extremity joint mechanics. These coordination differences can result in measurable changes in kinematic and kinetic patterns. When locomotion speed changes, the functional role and movement strategy of each joint is altered. A deeper understanding of joint level mechanics and functional interactions will benefit rehabilitation programs and assistive device development. In this study, joint stiffness, joint mechanical work and power were assessed, as they relate to dynamic function of joints during locomotion...
January 10, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29291544/limit-cycle-dynamics-of-the-gymnastics-longswing
#20
Domenico Vicinanza, Karl M Newell, Gareth Irwin, Lee Smith, Genevieve K R Williams
The purpose of the study was to examine the macroscopic dynamics of the longswing through a limit cycle analysis of the motion of the center of mass (CM) as a function of skill level. One elite international, five gymnasts able to perform release and regrasp skills, five gymnasts unable to perform release and regrasp skills, and five novice gymnasts each performed four consecutive longswings on a high bar. Kinematic data were collected to facilitate the calculation of the center of mass position of the performer during swinging...
December 29, 2017: Human Movement Science
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