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https://www.readbyqxmd.com/read/29122194/multi-directional-one-handed-strength-assessments-using-anybody-modeling-systems
#1
Divyaksh Subhash Chander, Maria Pia Cavatorta
Digital human modeling tools support proactive ergonomics in optimizing work tasks and workplace layouts. Empirical-statistical model based tools are often used to estimate the force exertion capability of the operators. This work is intended to serve as an initial probing into the usability of a musculoskeletal model based software, AnyBody Modeling Systems (AMS), in evaluating the force exertion capability at different points in the workspace and for various exertion directions. As a first step, it focuses on the modeling approach and the accuracy of one-handed isometric strength estimates of AMS...
February 2018: Applied Ergonomics
https://www.readbyqxmd.com/read/29114765/operator-bias-errors-are-reduced-using-standing-marker-alignment-device-for-repeated-visit-studies
#2
Laura Hutchinson, Joel B Schwartz, Amy M Morton, Irene S Davis, Kevin Deluzio, Michael J Rainbow
When optical motion capture is used for motion analysis, reflective markers or a digitizer are typically used to record the location of anatomical landmarks identified through palpation. The landmarks are then used to construct anatomical coordinate systems. Failure to consistently identify landmarks through palpation over repeat tests creates artifacts in the kinematic waveforms. The purpose of this work was to improve intra- and inter-rater reliability in determining anatomical landmarks and the associated anatomical coordinate systems using a Marker Alignment Device...
November 6, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29110218/cervical-sagittal-balance-a-biomechanical-perspective-can-help-clinical-practice
#3
REVIEW
Avinash G Patwardhan, Saeed Khayatzadeh, Robert M Havey, Leonard I Voronov, Zachary A Smith, Olivia Kalmanson, Alexander J Ghanayem, William Sears
PURPOSE: In this article, we summarize our work on understanding the influence of cervical sagittal malalignment on the mechanics of the cervical spine. METHODS: Biomechanical studies were performed using an ex vivo laboratory model to study the kinematic and kinetic response of human cervical spine specimens in the setting of cervical sagittal imbalance. The model allowed controlled variations of C2-C7 Sagittal Vertical Alignment (C2-C7 SVA) and T1-Slope so that clinically relevant sagittally malaligned profiles could be prescribed, while maintaining horizontal gaze, and their biomechanical consequences studied...
November 6, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29103927/three-dimensional-gait-analysis-reveals-dynamic-alignment-change-in-a-patient-with-dropped-head-syndrome-a-case-report
#4
Kousei Miura, Hideki Kadone, Masao Koda, Hiroshi Kumagai, Katsuya Nagashima, Kengo Fujii, Hiroshi Noguchi, Toru Funayama, Tetsuya Abe, Takeo Furuya, Masashi Yamazaki
Dropped head syndrome (DHS) is a cervical kyphotic deformity caused by apparent weakness of the neck extensor muscles. We often encounter patients whose symptoms, including impaired forward vision and neck pain, deteriorate while walking. This is the first report of a case of dynamic spinal alignment change in a patient with DHS during walking using three-dimensional gait analysis. A 78-year-old Japanese woman complained of impaired forward vision and neck pain while walking. Her radiograph showed severe cervical kyphosis...
November 3, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29076333/the-influence-of-natural-head-position-on-the-cervical-sagittal-alignment
#5
Kuan Wang, Zhen Deng,, Zhengyan Li, Huihao Wang, Hongsheng Zhan
Introduction: This study investigated the relationship between the parameters related to the natural head position and cervical segmental angles and alignment of patients with neck pain. Material and Methods: The lateral radiographs of the cervical spine were collected from 103 patients and were used to retrospectively analyze the correlation between the natural head position, cervical local sagittal angles, and alignment. Sagittal measurements were as follows: cervical curvature classification, slope of McGregor's line (McGS), local sagittal angles (C0–C2 angle, C2–C5 angle, C5–C7 angle, and C2–C7 angle), T1 slope, center of gravity of the head to sagittal vertical axis (CG–C7 SVA), and local sagittal alignment (C0–C2 SVA and C2–C7 SVA)...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29065584/the-influence-of-natural-head-position-on-the-cervical-sagittal-alignment
#6
Kuan Wang, Zhen Deng, Zhengyan Li, Huihao Wang, Hongsheng Zhan
INTRODUCTION: This study investigated the relationship between the parameters related to the natural head position and cervical segmental angles and alignment of patients with neck pain. MATERIAL AND METHODS: The lateral radiographs of the cervical spine were collected from 103 patients and were used to retrospectively analyze the correlation between the natural head position, cervical local sagittal angles, and alignment. Sagittal measurements were as follows: cervical curvature classification, slope of McGregor's line (McGS), local sagittal angles (C0-C2 angle, C2-C5 angle, C5-C7 angle, and C2-C7 angle), T1 slope, center of gravity of the head to sagittal vertical axis (CG-C7 SVA), and local sagittal alignment (C0-C2 SVA and C2-C7 SVA)...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29055741/radiologically-defining-horizontal-gaze-using-eos%C3%A2-imaging-a-prospective-study-of-healthy-subjects-and-a-retrospective-audit
#7
Hwee Weng Dennis Hey, Kimberly-Anne Tan, Vivienne Chien-Lin Ho, Syifa Bte Azhar, Joel-Louis Lim, Gabriel Ka-Po Liu, Hee-Kit Wong
Background Context As sagittal alignment of the cervical spine is important for maintaining horizontal gaze, it is important to determine the former for surgical correction. However, horizontal gaze remains poorly-defined from a radiological point-of-view. Purpose To establish radiographic criteria to define horizontal gaze. Study design/Setting This study was conducted at a tertiary healthcare institution over a 1-month period. Patient Sample A prospective cohort of healthy patients was used to determine the best radiological criteria for defining horizontal gaze...
October 18, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29037657/procedures-of-assessment-on-the-quantification-of-thoracic-kyphosis-and-lumbar-lordosis-by-radiography-and-photogrammetry-a-literature-review
#8
Alessandra Beggiato Porto, Victor Hugo Alves Okazaki
The quantification of thoracic kyphosis and lumbar lordosis can be assessed in different ways; among them radiography and photogrammetry. However, the assessment procedures are not consistent in the literature for either method. The objective of this study was to conduct a literature review about postural assessment through radiography and photogrammetry, for delineating the procedures for both methods. In total 38 studies were selected by an online search in the MEDLINE and LILACS databases with the keywords: radiograph and posture, postural alignment, photogrammetry or photometry or biophotogrammetry...
October 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28985696/a-new-prosthetic-alignment-device-to-read-and-record-prosthesis-alignment-data
#9
Gholamhossein Pirouzi, Noor Azuan Abu Osman, Sadeeq Ali, Majid Davoodi Makinejad
Prosthetic alignment is an essential process to rehabilitate patients with amputations. This study presents, for the first time, an invented device to read and record prosthesis alignment data. The digital device consists of seven main parts: the trigger, internal shaft, shell, sensor adjustment button, digital display, sliding shell, and tip. The alignment data were read and recorded by the user or a computer to replicate prosthesis adjustment for future use or examine the sequence of changes in alignment and its effect on the posture of the patient...
October 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28978769/case-studies-in-neuroscience-a-dissociation-of-balance-and-posture-demonstrated-by-camptocormia
#10
Rebecca J St George, Victor S Gurfinkel, Jeff Kraakevik, John G Nutt, Fay B Horak
Upright stance in humans requires an intricate exchange between the neural mechanisms that control balance and those that control posture; however, the distinction between these control systems is hard to discern in healthy subjects. By studying balance and postural control of a participant with camptocormia - an involuntary flexion of the trunk during standing that resolves when supine - a divergence between balance and postural control was revealed. A kinematic and kinetic investigation of standing and walking showed a stereotyped flexion of the upper body by almost 80 degrees over a few minutes, and yet the participant's ability to control their center of mass within their base of support and to compensate for external perturbations remained intact...
October 4, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28971359/baropodometry-on-patients-after-total-knee-arthroplasty
#11
A Notarnicola, G Maccagnano, A Fiore, A Spinarelli, L Montenegro, M Paoloni, F Pastore, S Tafuri, B Moretti
PURPOSE: It is well known that total knee replacement surgery decreases pain and improves function, but the effect on postural assessment needs to be studied better with the use of new technological devices. Total knee arthroplasty (TKA) improves motor coordination and stability of the knee. On the other hand, changing joint functionality can modify the balance. The aim of this trial is to record and analyze the static and dynamic baropodometric data of patients in the first few months following joint replacement...
October 3, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28962913/analysis-of-cervical-spine-alignment-in-currently-asymptomatic-individuals-prevalence-of-kyphotic-posture-and-its-relationship-with-other-spinopelvic-parameters
#12
Seok Woo Kim, Tae-Hwan Kim, Do Hee Bok, Chulyoung Jang, Myung Ho Yang, Seonjong Lee, Je Hyun Yoo, Yoon Hae Kwak, Jae Keun Oh
BACKGROUND CONTEXT: Many studies tend to characterize cervical kyphosis as a significant clinical condition that needs to be treated. Moreover, opinions vary on whether cervical kyphosis should be considered a pathologic status or a natural occurrence in asymptomatic people. PURPOSE: This study aimed to determine the frequency of kyphotic posture of the cervical spine in currently asymptomatic individuals and to ascertain its relation with other spinopelvic parameters...
September 27, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28957404/megachiropteran-bats-profoundly-unique-from-microchiropterans-in-climbing-and-walking-locomotion-evolutionary-implications
#13
Rick A Adams, Richard T Carter
Understandably, most locomotor analyses of bats have focused on flight mechanics and behaviors. However, we investigated nonflight locomotion in an effort to glean deeper insights into the evolutionary history of bats. We used high-speed video (300 Hz) to film and compare walking and climbing mechanics and kinematics between several species of the suborders Megachiroptera (Pteropodidae) versus Microchiroptera (Vespertilionidae and Phyllostomatidae). We found fundamentally distinctive behaviors, functional abilities, and performance outcomes between groups, but nearly homogeneous outcomes within groups...
2017: PloS One
https://www.readbyqxmd.com/read/28946524/are-the-alterations-in-body-posture-related-to-decreased-trunk-muscle-endurance-in-healthy-young-adults
#14
Seher Özyürek, Deniz Bayraktar, Arzu Genç
BACKGROUND: Trunk muscle endurance exercises are commonly used for correcting the postural alterations. However, there is no study investigating the relationship between postural alignment and trunk muscle endurance in healthy young adults. OBJECTIVE: The aim of this study was to examine whether the three-dimensional (3D) body posture is related to trunk muscle endurance in healthy young adults. METHODS: Forty-two healthy young adults enrolled in this study...
September 8, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/28929312/the-effect-of-hand-position-on-perceived-finger-orientation-in-left-and-right-handers
#15
Lindsey E Fraser, Laurence R Harris
In the absence of visual feedback, the perceived orientation of the fingers is systematically biased. In right-handers these biases are asymmetrical between the left and right hands in the horizontal plane and may reflect common functional postures for the two hands. Here we compared finger orientation perception in right- and left-handed participants for both hands, across various hand positions in the horizontal plane. Participants rotated a white line on a screen optically superimposed over their hand to indicate the perceived position of the finger that was rotated to one of seven orientations with the hand either aligned with the body midline, aligned with the shoulder, or displaced by twice the shoulder-to-midline distance from the midline...
December 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28914720/effects-of-corrective-exercise-for-thoracic-hyperkyphosis-on-posture-balance-and-well-being-in-older-women-a-double-blind-group-matched-design
#16
Hyun-Jeong Jang, Lynne C Hughes, Duck-Won Oh, Suhn-Yeop Kim
BACKGROUND AND PURPOSE: The purpose of this study was to identify the effects of a corrective exercise for thoracic hyperkyphosis on posture, balance, and well-being in Korean community-dwelling older women. METHODS: Fifty women 65 years of age and older, recruited from 2 senior centers, participated in this study. Participants were assigned to either the experimental group (EG) or the control group (CG) on the basis of convenience of location, and 22 in each were analyzed...
September 13, 2017: Journal of Geriatric Physical Therapy
https://www.readbyqxmd.com/read/28912700/action-direction-of-muscle-synergies-in-voluntary-multi-directional-postural-control
#17
Akari Kubo, Shota Hagio, Benio Kibushi, Toshio Moritani, Motoki Kouzaki
A muscle synergy is a coordinative structure of muscles that has been proposed as a strategy to reduce the number of variables that the central nervous system (CNS) has to address in motor tasks. In this article, the mechanical contribution of muscle synergies and coordinative structures of muscles in voluntary multi-directional postural control were investigated. The task for healthy, young subjects was to shift and align their center of pressure (COP) to targets dispersed in 12 different directions in the horizontal plane by leaning their bodies for 10 s...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28886864/analysis-of-the-cranio-cervical-curvatures-in-subjects-with-migraine-with-and-without-neck-pain
#18
Gabriela Natália Ferracini, Thais Cristina Chaves, Fabíola Dach, Débora Bevilaqua-Grossi, César Fernández-de-Las-Peñas, José Geraldo Speciali
OBJECTIVE: To investigate the differences in head and cervical spine alignment between subjects with migraine and healthy people. DESIGN: A cross-sectional, observational study. PARTICIPANTS: Fifty subjects with migraine and 50 matched healthy controls. MAIN OUTCOMES MEASURES: The presence of neck pain and neck pain-related disability was assessed. Four angles (high cervical angle, low cervical angle, atlas plane angle and cervical lordosis Cobb angle) as well as four distances (anterior translation distance, C0 to C1 distance, C2 to C7 posterior translation and hyoid triangle) were calculated using digitalised radiographs and analysed using K-Pacs(®) software...
March 24, 2017: Physiotherapy
https://www.readbyqxmd.com/read/28880595/lower-leg-and-foot-contributions-to-turnout-in-university-level-female-ballet-dancersa-preliminary-investigation
#19
Sarah L Carter, Alan R Bryant, Luke S Hopper
BACKGROUND: Turnout in ballet is produced through summation of the joint structure characteristics and ranges of motion at the hip, knee, ankle, and foot. Contributions of the hip joint to functional turnout in dancers have received extensive examination, whereas little is known about contributions from the knee, ankle, and foot. The aim of this study was to explore the nonhip components of turnout to dancers' functional turnout in first position by assessing passive external tibiofemoral rotation and active measures of foot pronation, ie, navicular drop and Foot Posture Index...
July 2017: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/28878486/treating-slouchy-hyperkyphosis-posture-with-chiropractic-biophysics-%C3%A2-a-case-report-utilizing-a-multimodal-mirror-image-%C3%A2-rehabilitation-program
#20
Miles O Fortner, Paul A Oakley, Deed E Harrison
[Purpose] To present a case of the non-surgical reduction of 'slouchy' hyperkyphosis posture utilizing the multimodal Chiropractic BioPhysics(®) rehabilitation program emphasizing the mirror image(®) concept. [Subject and Methods] A 27-year-old female presented suffering from neck and back pains, headaches and gait dysfunction. The patient was treated 30 times over a period of 6-months. Treatment consisted of anterior thoracic translation, thoracic extension, and head retraction exercises as well as spinal traction and spinal manipulation...
August 2017: Journal of Physical Therapy Science
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