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https://www.readbyqxmd.com/read/28892715/upper-body-accelerations-during-walking-are-altered-in-adults-with-acl-reconstruction
#1
C N Armitano, S Morrison, D M Russell
This study was designed to assess and compare the pattern of acceleration from the lower trunk, neck and head regions for individuals with reconstructed ACL compared to healthy controls during walking. Participants with unilateral ACL reconstruction and matched control persons participated in the study. Accelerations were collected using three triaxial accelerometers attached to the head, neck, and lower trunk. Measures of amplitude and signal regularity of the acceleration data were performed. Similarities were seen between both groups with regards to the general acceleration patterns in all three axes...
September 5, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28859201/characterization-of-head-trunk-coordination-deficits-after-unilateral-vestibular-hypofunction-using-wearable-sensors
#2
Serene S Paul, Leland E Dibble, Raymond G Walther, Clough Shelton, Richard Klaus Gurgel, Mark E Lester
Importance: Individuals with vestibular hypofunction acutely restrict head motion to reduce symptoms of dizziness and nausea. This restriction results in abnormal decoupling of head motion from trunk motion, but the character, magnitude, and persistence of these deficits are unclear. Objective: To use wearable inertial sensors to quantify the extent of head and trunk kinematic abnormalities in the subacute stage after resection of vestibular schwannoma (VS) and the particular areas of deficit in head-trunk motion...
August 31, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28855323/rib-kinematics-during-lung-ventilation-in-the-american-alligator-alligator-mississippiensis-an-xromm-analysis
#3
Robert J Brocklehurst, Sabine Moritz, Jonathan Codd, William I Sellers, Elizabeth L Brainerd
The current hypothesis regarding the mechanics of breathing in crocodylians is that the double-headed ribs, with both a capitulum and tuberculum, rotate about a constrained axis passing through the two articulations; moreover, this axis shifts in the caudal thoracic ribs, as the vertebral parapophysis moves from the centrum to the transverse process. Additionally, the ventral ribcage in crocodylians is thought to possess additional degrees of freedom through mobile intermediate ribs. In this study, X-ray reconstruction of moving morphology (XROMM) was used to quantify rib rotation during breathing in American alligators...
September 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28821443/the-effect-of-pelvic-motion-on-spino-pelvic-parameters
#4
Andrew M Hayden, Ann M Hayes, Jennifer L Brechbuhler, Heidi Israel, Howard M Place
BACKGROUND CONTEXT: To date, many studies have examined how pelvic position affects the spinal curvature and spino-pelvic parameters. However, these studies focus on a static relationship, comparing pelvis and spine in a relaxed or baseline position only. Indeed, the spino-pelvic connection is dynamic, as a subject can easily be taught to rotate their pelvis anteriorly or posteriorly on the femoral head, all while maintaining an erect posture. Therefore, for a true understanding of pelvic influence on the spinal column, it is necessary to examine spino-pelvic parameters in multiple pelvic positions within the same subject...
August 15, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28777287/comparison-of-clinical-findings-of-congenital-muscular-torticollis-between-patients-with-and-without-sternocleidomastoid-lesions-as-determined-by-ultrasonography
#5
Mi-Hyang Han, Jin Young Kang, Hyun Jung Do, Hyun Suk Park, Hyun Jin Noh, Yun-Hwa Cho, Dae-Hyun Jang
AIM: To compare clinical findings for patients with congenital muscular torticollis (CMT) between those with and without a sternocleidomastoid (SCM) lesion. METHODS: Medical records of 182 patients with CMT were retrospectively reviewed and the patients were divided into SCM lesion and nonlesion groups by ultrasonographic results. Intrauterine position, age, duration of therapy, rotation/tilting side, and the passive range of motion and angle of the neck were compared...
August 2, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28771373/biomechanical-evaluation-of-glenoid-reconstruction-with-an-implant-free-j-bone-graft-for-anterior-glenoid-bone-loss
#6
Leo Pauzenberger, Felix Dyrna, Elifho Obopilwe, Philipp R Heuberer, Robert A Arciero, Werner Anderl, Augustus D Mazzocca
BACKGROUND: The anatomic restoration of glenoid morphology with an implant-free J-shaped iliac crest bone graft offers an alternative to currently widely used glenoid reconstruction techniques. No biomechanical data on the J-bone grafting technique are currently available. PURPOSE: To evaluate (1) glenohumeral contact patterns, (2) graft fixation under cyclic loading, and (3) the initial stabilizing effect of anatomic glenoid reconstruction with the implant-free J-bone grafting technique...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28765802/clinical-gait-analysis-on-a-patient-undergoing-surgical-correction-of-kyphosis-from-severe-ankylosing-spondylitis
#7
Ram Haddas, Theodore Belanger
BACKGROUND: Ankylosing spondylitis (AS) is a chronic inflammatory disease primarily affecting the axial skeleton, including the sacroiliac joints, costovertebral joints, and the spine. Patients with AS found to have an alter gait pattern. The purpose of this study was to investigate biomechanical alterations in gait after surgical correction in a patient with severe kyphosis from AS. METHODS: A case report in controlled laboratory study, a pretest-posttest design...
2017: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/28742107/analyzing-the-locomotory-gaitprint-of-caenorhabditis-elegans-on-the-basis-of-empirical-mode-decomposition
#8
Li-Chun Lin, Han-Sheng Chuang
The locomotory gait analysis of the microswimmer, Caenorhabditis elegans, is a commonly adopted approach for strain recognition and examination of phenotypic defects. Gait is also a visible behavioral expression of worms under external stimuli. This study developed an adaptive data analysis method based on empirical mode decomposition (EMD) to reveal the biological cues behind intricate motion. The method was used to classify the strains of worms according to their gaitprints (i.e., phenotypic traits of locomotion)...
2017: PloS One
https://www.readbyqxmd.com/read/28733769/communication-for-coordination-gesture-kinematics-and-conventionality-affect-synchronization-success-in-piano-duos
#9
Laura Bishop, Werner Goebl
Ensemble musicians often exchange visual cues in the form of body gestures (e.g., rhythmic head nods) to help coordinate piece entrances. These cues must communicate beats clearly, especially if the piece requires interperformer synchronization of the first chord. This study aimed to (1) replicate prior findings suggesting that points of peak acceleration in head gestures communicate beat position and (2) identify the kinematic features of head gestures that encourage successful synchronization. It was expected that increased precision of the alignment between leaders' head gestures and first note onsets, increased gesture smoothness, magnitude, and prototypicality, and increased leader ensemble/conducting experience would improve gesture synchronizability...
July 21, 2017: Psychological Research
https://www.readbyqxmd.com/read/28728948/automated-gesture-tracking-in-head-fixed-mice
#10
A Giovannucci, E A Pnevmatikakis, B Deverett, T Pereira, J Fondriest, M J Brady, S S-H Wang, W Abbas, P Parés, D Masip
BACKGROUND: The preparation consisting of a head-fixed mouse on a spherical or cylindrical treadmill offers unique advantages in a variety of experimental contexts. Head fixation provides the mechanical stability necessary for optical and electrophysiological recordings and stimulation. Additionally, it can be combined with virtual environments such as T-mazes, enabling these types of recording during diverse behaviors. NEW METHOD: In this paper we present a low-cost, easy-to-build acquisition system, along with scalable computational methods to quantitatively measure behavior (locomotion and paws, whiskers, and tail motion patterns) in head-fixed mice locomoting on cylindrical or spherical treadmills...
July 17, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28714759/effects-of-rigid-and-kinesio-taping-on-shoulder-rotation-motions-posterior-shoulder-tightness-and-posture-in-asymptomatic-overhead-athletes-a-randomized-controlled-trial
#11
Damla Gulpinar, Sibel Tekeli Ozer, Sevgi S Yesilyaprak
CONTEXT: Alterations in posture and motion patterns are thought to play a role in developing shoulder injuries in overhead athletes. Taping is widely used in the sporting population, but there are limited empirical data regarding its effectiveness. OBJECTIVES: To determine and compare the effects of rigid and kinesio taping on shoulder rotation motions, posterior shoulder tightness (PST) and posture in overhead athletes. DESIGN: Randomized controlled trial...
July 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28713039/efficacy-of-ankle-foot-orthoses-types-on-walking-in-children-with-cerebral-palsy-a-systematic-review
#12
REVIEW
Atefeh Aboutorabi, Mokhtar Arazpour, Monireh Ahmadi Bani, Hassan Saeedi, John S Head
BACKGROUND: Ankle foot orthoses (AFOs) are orthotic devices that can be used to normalize the walking pattern of children with cerebral palsy (CP). One of the aims of orthotic management is to produce a more normal gait pattern by positioning joints in the proper position to reduce pathological reflex or spasticity. OBJECTIVE: To conduct a systematic review of the literature and establish the effect of treatment with various types of AFOs on gait patterns of children with CP...
July 13, 2017: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28709588/postural-disorders-in-mouth-breathing-children-a-systematic-review
#13
REVIEW
Patricia Dayrell Neiva, Renata Noce Kirkwood, Polyana Leite Mendes, Karl Zabjek, Helena Gonçalves Becker, Sunita Mathur
BACKGROUND: Mouth breathing syndrome can cause sleep disturbances that compromise the performance of children in school. It might also cause postural abnormalities involving the head and cervical spine; however, the association between postural abnormalities and mouth breathing in children is unclear. OBJECTIVE: To assess the methodological quality of studies and determine if there is an association between mouth breathing and postural disorders in children. METHODS: Databases comprised MEDLINE, CINAHL, PEDro, LILACS, EMBASE and Cochrane Central Registrar of Controlled Trials...
July 5, 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/28704631/driver-movement-patterns-indicate-distraction-and-engagement
#14
Robert G Radwin, John D Lee, Oguz Akkas
Objective This research considers how driver movements in video clips of naturalistic driving are related to observer subjective ratings of distraction and engagement behaviors. Background Naturalistic driving video provides a unique window into driver behavior unmatched by crash data, roadside observations, or driving simulator experiments. However, manually coding many thousands of hours of video is impractical. An objective method is needed to identify driver behaviors suggestive of distracted or disengaged driving for automated computer vision analysis to access this rich source of data...
August 2017: Human Factors
https://www.readbyqxmd.com/read/28687325/velocity-perception-in-a-moving-observer
#15
Hinze Hogendoorn, David Alais, Hamish MacDougall, Frans A J Verstraten
Previous research has shown that when a moving stimulus is presented to a moving observer, the perceived speed of the stimulus is affected by vestibular self-motion signals (Hogendoorn, Verstraten, MacDougall, & Alais, 2017. Vision Research 130, 22-30.). This interaction was interpreted as a weighted sum of visual and vestibular motion signals. This interpretation also predicts effects of vestibular self-motion signals on perceived speed. Here, we test this prediction in two experiments. In Experiment 1, moving observers carried out a visual speed discrimination task in order to establish points of subjective equality (PSE) between stimuli presented in the same or opposite direction of self-motion...
September 2017: Vision Research
https://www.readbyqxmd.com/read/28677940/effect-of-shoulder-position-on-triceps-brachii-heads-activity-in-dumbbell-elbow-extension-exercises
#16
Daniel de Souza Alves, Thiago T da Matta, Liliam F de Oliveira
BACKGROUND: Elbow extension exercises in different shoulder positions are selected to raise distinct effort levels among the triceps brachii heads. Because there are several triceps exercises, its choice is a big challenge on resistance training prescription. The present study aimed to compare the electromyographic signal of triceps brachii long and lateral heads among three different elbow ranges of motion (ROM) during two commonly prescribed elbow extension exercises: overhead dumbbell elbow extension (OD) and lying dumbbell elbow extension (LD)...
July 5, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28632058/assessment-of-model-based-image-matching-for-future-reconstruction-of-unhelmeted-sport-head-impact-kinematics
#17
Gregory J Tierney, Hamed Joodaki, Tron Krosshaug, Jason L Forman, Jeff R Crandall, Ciaran K Simms
Player-to-player contact inherent in many unhelmeted sports means that head impacts are a frequent occurrence. Model-Based Image-Matching (MBIM) provides a technique for the assessment of three-dimensional linear and rotational motion patterns from multiple camera views of a head impact event, but the accuracy is unknown for this application. The goal of this study is to assess the accuracy of the MBIM method relative to reflective marker-based motion analysis data for estimating six degree of freedom head displacements and velocities in a staged pedestrian impact scenario at 40 km/h...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28625875/individual-differences-in-functional-connectivity-during-naturalistic-viewing-conditions
#18
Tamara Vanderwal, Jeffrey Eilbott, Emily S Finn, R Cameron Craddock, Adam Turnbull, F Xavier Castellanos
Naturalistic viewing paradigms such as movies have been shown to reduce participant head motion and improve arousal during fMRI scanning relative to task-free rest, and have been used to study both functional connectivity and stimulus-evoked BOLD-signal changes. These task-based hemodynamic changes are synchronized across subjects and involve large areas of the cortex, and it is unclear whether individual differences in functional connectivity are enhanced or diminished under such naturalistic conditions. This work first aims to characterize variability in BOLD-signal based functional connectivity (FC) across 2 distinct movie conditions and eyes-open rest (n=31 healthy adults, 2 scan sessions each)...
June 16, 2017: NeuroImage
https://www.readbyqxmd.com/read/28624870/translatory-hip-kinematics-measured-with-optoelectronic-surgical-navigation
#19
Sima Zakani, John F Rudan, Randy E Ellis
PURPOSE: An optoelectronic surgical navigation system was used to detect small but measurable translational motion of human hip cadavers in high-range passive motions. Kinematic data were also examined to demonstrate the role of soft tissues in constraining hip translation. METHODS: Twelve cadaver hips were scanned using CT, instrumented for navigation, and passively taken through motion assessment. Center of the femoral head was tracked in the acetabular coordinates...
August 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28623465/tooth-brushing-motion-patterns-with-manual-and-powered-toothbrushes-a-randomised-video-observation-study
#20
C Ganss, R Duran, T Winterfeld, N Schlueter
INTRODUCTION: Systematic reviews have shown that powered toothbrushes (PTs) are more effective than manual toothbrushes (MTs), but with only minor effect sizes. Whether PTs are used adequately, however, has not been investigated so far. The aim of the present study was therefore to analyse motion habits with PT in comparison to MT toothbrushes by video observation. MATERIALS AND METHODS: One hundred subjects were enrolled in this observational trial and brushed their teeth in randomised order with a MT and PT while being video-filmed, resulting in 95 analysable sets of recordings...
June 16, 2017: Clinical Oral Investigations
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