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https://www.readbyqxmd.com/read/29765175/the-impact-of-walking-speed-on-interlimb-coordination-in-individuals-with-parkinson-s-disease
#1
Cheng-Chieh Lin, Robert C Wagenaar
[Purpose] Interlimb coordination can be affected by the symptoms associated with Parkinson's disease and may result in an increased risk of falls. The purpose of the current study was to compare changes in interlimb coordination in individuals with Parkinson's disease to healthy older adults while systematically manipulating walking speed. [Subjects and Methods] Participants walked on a treadmill while systematically increasing and decreasing the walking speed between 0.22 and 1.30 m/s. Kinematic data were collected by means of a three dimensional motion capture system...
May 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29761555/computational-optimization-of-graft-tension-in-simulated-superior-capsule-reconstructions
#2
Michael W Hast, Elaine Schmidt, John D Kelly, Josh R Baxter
Superior capsular reconstruction has received increased attention as a surgical technique to address massive 'irreparable' rotator cuff tears; however, the functional limitations and surgical techniques associated with this repair have yet to be sufficiently explored. The goal of this study was to utilize a multidisciplinary approach to characterize the biomechanics of this repair by: 1) identifying activities of daily living that may overburden graft, and 2) optimizing surgical techniques used during implantation...
May 14, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29761537/scapular-upward-rotator-morphologic-characteristics-in-individuals-with-and-without-forward-head-posture-a-case-control-study
#3
Fariba Khosravi, Anneli Peolsson, Noureddin Karimi, Leila Rahnama
OBJECTIVES: There are several reports suggesting that forward head posture contributes to alterations in scapular kinematics and muscle activity, leading to the development of shoulder problems. Currently, it is unknown whether forward head posture alters the thickness of the scapular muscles. The aim of this study was to compare the thickness of the serratus anterior and upper and lower trapezius muscles at rest and during loaded isometric contractions in individuals with and without forward head posture...
May 15, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29752051/effect-of-shoulder-model-complexity-in-upper-body-kinematics-analysis-of-the-golf-swing
#4
M Bourgain, S Hybois, P Thoreux, O Rouillon, P Rouch, C Sauret
The golf swing is a complex full body movement during which the spine and shoulders are highly involved. In order to determine shoulder kinematics during this movement, multibody kinematics optimization (MKO) can be recommended to limit the effect of the soft tissue artifact and to avoid joint dislocations or bone penetration in reconstructed kinematics. Classically, in golf biomechanics research, the shoulder is represented by a 3 degrees-of-freedom model representing the glenohumeral joint. More complex and physiological models are already provided in the scientific literature...
April 25, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29741468/kinematic-parameters-contributing-to-the-production-of-spin-in-elite-finger-spin-bowling
#5
L Sanders, P J Felton, M A King
The aim of this study was to identify the key kinematic parameters which contribute to higher spin rates in elite finger spin bowling. Kinematic data were collected for twenty-three elite male finger spin bowlers with thirty kinematic parameters calculated for each delivery. Stepwise linear regression and Pearson product moment correlations were used to identify kinematic parameters linked to spin rate. Pelvis orientation at front foot contact (r = 0.674, p < 0.001) and ball release (r = 0.676, p < 0...
May 9, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29738991/digital-tracking-algorithm-reveals-the-influence-of-structural-irregularities-on-joint-movements-in-the-human-cervical-spine
#6
Christian Balkovec, Jim Veldhuis, John W Baird, G Wayne Brodland, Stuart M McGill
BACKGROUND: Disc height loss and osteophytes change the local mechanical environment in the spine; while previous research has examined kinematic dysfunction under degenerative change, none has looked at the influence of disc height loss and osteophytes throughout movement. METHODS: Twenty patients with pain related to the head, neck or shoulders were imaged via videofluoroscopy as they underwent sagittal-plane flexion and extension. A clinician graded disc height loss and osteophytes as "severe/moderate", "mild", or "none"...
April 26, 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29732047/rehabilitation-of-upper-limb-in-children-with-acquired-brain-injury-a-preliminary-comparative-study
#7
Elena Beretta, Ambra Cesareo, Emilia Biffi, Carolyn Schafer, Sara Galbiati, Sandra Strazzer
Acquired brain injuries (ABIs) can lead to a wide range of impairments, including weakness or paralysis on one side of the body known as hemiplegia. In hemiplegic patients, the rehabilitation of the upper limb skills is crucial, because the recovery has an immediate impact on patient quality of life. For this reason, several treatments were developed to flank physical therapy (PT) and improve functional recovery of the upper limbs. Among them, Constraint-Induced Movement Therapy (CIMT) and robot-aided therapy have shown interesting potentialities in the rehabilitation of the hemiplegic upper limb...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29695317/influence-of-joint-kinematics-on-polyethylene-wear-in-anatomic-shoulder-joint-arthroplasty
#8
Steffen Braun, Stefan Schroeder, Ulrike Mueller, Robert Sonntag, Matthias Buelhoff, Jan Philippe Kretzer
BACKGROUND: Despite the positive results in total shoulder arthroplasties (TSAs), a higher revision rate is documented compared with total hip and knee replacements. Wear is the possible main cause of TSA failure in the long-term. This study investigated the effect of joint kinematics and the influence of the rotator cuff on the polyethylene wear performance in an anatomic TSA. METHODS: Lifting a load of 2 kg with an abduction/adduction of 0° to 90° was simulated for 2 × 106 cycles as a primary motion using a fully kinematic joint simulator...
April 23, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29687013/effects-of-game-pitch-count-and-body-mass-index-on-pitching-biomechanics-in-9-to-10-year-old-baseball-athletes
#9
Jim D Darke, Eshan M Dandekar, Arnel L Aguinaldo, Scott J Hazelwood, Stephen M Klisch
Background: Pitching while fatigued and body composition may increase the injury risk in youth and adult pitchers. However, the relationships between game pitch count, biomechanics, and body composition have not been reported for a study group restricted to 9- to 10-year-old athletes. Hypothesis: During a simulated game with 9- to 10-year-old athletes, (1) participants will experience biomechanical signs of fatigue, and (2) shoulder and elbow kinetics will correlate with body mass index (BMI)...
April 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29673397/sex-differences-in-kinematic-adaptations-to-muscle-fatigue-induced-by-repetitive-upper-limb-movements
#10
Jason Bouffard, Chen Yang, Mickael Begon, Julie Côté
BACKGROUND: Muscle fatigue induced by repetitive movements contributes to the development of musculoskeletal disorders. Men and women respond differently to muscle fatigue during isometric single-joint efforts, but sex differences during dynamic multi-joint tasks have not been clearly identified. Moreover, most studies comparing men and women during fatigue development assessed endurance time. However, none evaluated sex differences in kinematic adaptations to fatigue during multi-joint dynamic tasks...
April 19, 2018: Biology of Sex Differences
https://www.readbyqxmd.com/read/29658937/kinematic-analysis-using-3d-motion-capture-of-drinking-task-in-people-with-and-without-upper-extremity-impairments
#11
Margit Alt Murphy, Steve Murphy, Hanna C Persson, Ulla-Britt Bergström, Katharina Stibrant Sunnerhagen
Kinematic analysis is a powerful method for objective assessment of upper extremity movements in a three-dimensional (3D) space. Three-dimensional motion capture with an optoelectronic camera system is considered as golden standard for kinematic movement analysis and is increasingly used as outcome measure to evaluate the movement performance and quality after an injury or disease involving upper extremity movements. This article describes a standardized protocol for kinematic analysis of drinking task applied in individuals with upper extremity impairments after stroke...
March 28, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29658813/kinematic-upper-extremity-performance-in-people-with-near-or-fully-recovered-sensorimotor-function-after-stroke
#12
Gyrd Thrane, Katharina S Sunnerhagen, Hanna C Persson, Arve Opheim, Margit Alt Murphy
BACKGROUND: Clinical scales for upper extremity motor function may not capture improvement among higher functioning people with stroke. OBJECTIVE: To describe upper extremity kinematics in people with stroke who score within the upper 10% of the Fugl-Meyer Assessment (FMA-UE) and explore the ceiling effects of the FMA-UE. DESIGN: A cross-sectional study design was used. PARTICIPANTS: People with stroke were included from the Stroke Arm Longitudinal Study at University of Gothenburg together with 30 healthy controls...
April 16, 2018: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29651902/shoulder-and-lower-back-joint-reaction-forces-in-seated-double-poling
#13
Marie Lund Ohlsson, Jonas Danvind, L Joakim Holmberg
Overuse injuries in the shoulders and lower back are hypothesized to be common in cross-country sit-skiing. Athletes with reduced trunk muscle control mainly sits with their knees higher than hips (KH). To reduce spinal flexion, a position with the knees below the hips (KL) was enabled for these athletes using a frontal trunk support. The aim of the study was to compare the shoulder joint (glenohumeral joint) and L4-L5 joint reactions between the sitting positions KL and KH. Five able-bodied female athletes performed submaximal and maximal exercise tests in the sitting positions KL and KH on a ski-ergometer...
April 13, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29651893/differences-among-overhand-three-quarter-and-sidearm-pitching-biomechanics-in-professional-baseball-players
#14
Rafael F Escamilla, Jonathan S Slowik, Alek Z Diffendaffer, Glenn S Fleisig
The purpose of this study was to assess biomechanical differences among overhand, three-quarter, and sidearm arm-slot professional baseball pitchers. It was hypothesized that kinematic-and-kinetic differences would be found among the three groups, with sidearm pitchers demonstrating greater movement along the transverse plane, and overhead pitchers demonstrating greater movement along the sagittal plane. Based upon arm-slot-angle at ball-release, 30-overhand, 156-three-quarter, and 21-sidearm pitchers were tested using a 240-Hz-motion-analysis-system, and 37 kinematic-and-kinetic parameters were calculated...
April 13, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29613881/in-vivo-evaluation-of-subacromial-and-internal-impingement-risk-in-asymptomatic-individuals
#15
Margaret S Coats-Thomas, Daniel F Massimini, Jon J P Warner, Amee L Seitz
OBJECTIVE: The study aim was to evaluate subacromial and internal impingement risk between shoulders (dominant/non-dominant) during dynamic motion using subject-specific anatomy and precise in vivo kinematics. DESIGN: In a prospective cross-sectional study, 9 subjects underwent bilateral MR (N=18 shoulders) and fluoroscopic imaging during external rotation at 90° abduction (ER) and elevation. Subject-specific bone models were created and distances from footprint to (a) acromion and (b) glenoid were measured to evaluate risk...
April 2, 2018: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/29602634/scapular-kinematic-alterations-during-arm-elevation-with-decrease-in-pectoralis-minor-stiffness-after-stretching-in-healthy-individuals
#16
Jun Umehara, Masatoshi Nakamura, Satoru Nishishita, Hiroki Tanaka, Ken Kusano, Noriaki Ichihashi
BACKGROUND: Pectoralis minor tightness may be seen in individuals with scapular dyskinesis, and stretching is used for the treatment of altered scapular motion in sports and clinical fields. However, few researchers have reported on the effects of pectoralis minor stiffness on scapular motion during arm elevation. This study investigated whether an acute decrease of pectoralis minor stiffness after stretching changes the scapular motion during arm elevation. METHODS: The study allocated 15 dominant and 15 nondominant upper limbs in healthy men as control and interventional limbs, respectively...
March 27, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29600424/comparison-of-ice-hockey-goaltender-helmets-for-concussion-type-impacts
#17
J Michio Clark, Karen Taylor, Andrew Post, T Blaine Hoshizaki, Michael D Gilchrist
Concussions are among the most common injuries sustained by ice hockey goaltenders and can result from collisions, falls and puck impacts. However, ice hockey goaltender helmet certification standards solely involve drop tests to a rigid surface. This study examined how the design characteristics of different ice hockey goaltender helmets affect head kinematics and brain strain for the three most common impact events associated with concussion for goaltenders. A NOCSAE headform was impacted under conditions representing falls, puck impacts and shoulder collisions while wearing three different types of ice hockey goaltender helmet models...
March 29, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29584480/kinematics-and-shoulder-belt-engagement-of-children-on-belt-positioning-boosters-during-evasive-steering-maneuvers
#18
Gretchen Baker, Isabelle Stockman, Katarina Bohman, Lotta Jakobsson, Anna-Lisa Osvalder, Mats Svensson, Maria Wimmerstedt
OBJECTIVE: To increase the protection of child passengers in crashes preceded by evasive steering, understanding of how children interact with the seat belt in such situations is essential. This study aims to quantify child kinematics and describe child-to-restraint interaction during evasive steering maneuvers. METHODS: Eighteen child volunteers (aged 5-10) were seated on the rear seat of a passenger vehicle. A professional driver made repeatable sharp turns at 50 km/h...
February 28, 2018: Traffic Injury Prevention
https://www.readbyqxmd.com/read/29584475/occupant-kinematics-of-the-hybrid-iii-thor-m-and-postmortem-human-surrogates-under-various-restraint-conditions-in-full-scale-frontal-sled-tests
#19
Devon L Albert, Stephanie M Beeman, Andrew R Kemper
OBJECTIVE: The objective of this research was to compare the occupant kinematics of the Hybrid III (HIII), THOR-M, and postmortem human surrogates (PMHS) during full-scale frontal sled tests under 3 safety restraint conditions: knee bolster (KB), knee bolster and steering wheel airbag (KB/SWAB), and knee bolster airbag and steering wheel airbag (KBAB/SWAB). METHODS: A total of 20 frontal sled tests were performed with at least 2 tests performed per restraint condition per surrogate...
February 28, 2018: Traffic Injury Prevention
https://www.readbyqxmd.com/read/29581995/role-of-rotational-kinematics-in-minimizing-elbow-varus-torques-for-professional-versus-high-school-pitchers
#20
Micheal J Luera, Brittany Dowling, Mitchel A Magrini, Tyler W D Muddle, Ryan J Colquhoun, Nathaniel D M Jenkins
Background: Elbow injury rates among baseball pitchers are rapidly rising. However, this increase has been most dramatic among high school (HS) pitchers. Purpose: To examine pitch velocity and the kinetic and kinematic characteristics of HS versus professional (PRO) pitchers to identify potential differences that may play a role in the increased risk of ulnar collateral ligament injury in youth pitchers. Study Design: Controlled laboratory study...
March 2018: Orthopaedic Journal of Sports Medicine
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