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postural analysis

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https://www.readbyqxmd.com/read/28325010/step-length-and-width-variability-while-walking-on-a-motion-simulator-mounted-treadmill
#1
Timothy Boerger, Jacob Van Dehy, Tanya Onushko, Brian Schmit, Allison Hyngstrom
While devices which allow scientists to perturb normal walking are becoming increasingly common, postural adaptations to these perturbations have not been fully quantified. One way to quantify postural responses to perturbations are through the assessment of variability of step length and width. In the present study we determined variability of both step length and width while subjects walked under perturbations of varying amplitude in roll, pitch, yaw, anteroposterior, lateral, and combined roll, pitch, yaw directions...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324939/visual-transparent-visual-occlusion-an-eeg-and-cop-study
#2
Kwang Leng Goh, Susan Morris, Wee Lih Lee, Alexander Ring, Tele Tan
Electroencephalography (EEG) and centre of pressure (COP) data were recorded in young adults for 60 seconds during standing in visual transparent (VT) and visual occlusion (VO) conditions. In both of these conditions, participants wore VO liquid crystal spectacles which allowed the experimenter to accurately control visual information being presented or occluded to the participant. Alpha band (8-13 Hz) revealed significant differences in channel-averaged power spectrum in these two conditions, but not theta band (4-8 Hz) and beta band (13-30 Hz)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28319490/position-between-trunk-and-pelvis-during-gait-depending-on-the-gross-motor-function-classification-system
#3
Jose Manuel Sanz-Mengibar, Natalie Altschuck, Paloma Sanchez-de-Muniain, Christian Bauer, Fernando Santonja-Medina
PURPOSE: To understand whether there is a trunk postural control threshold in the sagittal plane for the transition between the Gross Motor Function Classification System (GMFCS) levels measured with 3-dimensional gait analysis. METHOD: Kinematics from 97 children with spastic bilateral cerebral palsy from spine angles according to Plug-In Gait model (Vicon) were plotted relative to their GMFCS level. RESULTS: Only average and minimum values of the lumbar spine segment correlated with GMFCS levels...
March 17, 2017: Pediatric Physical Therapy
https://www.readbyqxmd.com/read/28319489/autogenic-drainage-in-children-with-cystic-fibrosis
#4
Lieselotte Corten, Brenda M Morrow
PURPOSE: Airway clearance is an essential part of the management of cystic fibrosis (CF) as it facilitates clearance of viscous pulmonary secretions. This review aimed to determine the effect of autogenic drainage (AD) and assisted autogenic drainage (AAD) compared with no, sham, or other types of airway clearance in children with CF. SUMMARY OF KEY POINTS: Two pediatric randomized cross-over trials were identified on the use of AD in children with CF; no studies were available on the use of AAD...
March 17, 2017: Pediatric Physical Therapy
https://www.readbyqxmd.com/read/28319133/effects-of-sudden-walking-perturbations-on-neuromuscular-reflex-activity-and-three-dimensional-motion-of-the-trunk-in-healthy-controls-and-back-pain-symptomatic-subjects
#5
Juliane Mueller, Tilman Engel, Steffen Mueller, Josefine Stoll, Heiner Baur, Frank Mayer
BACKGROUND: Back pain patients (BPP) show delayed muscle onset, increased co-contractions, and variability as response to quasi-static sudden trunk loading in comparison to healthy controls (H). However, it is unclear whether these results can validly be transferred to suddenly applied walking perturbations, an automated but more functional and complex movement pattern. There is an evident need to develop research-based strategies for the rehabilitation of back pain. Therefore, the investigation of differences in trunk stability between H and BPP in functional movements is of primary interest in order to define suitable intervention regimes...
2017: PloS One
https://www.readbyqxmd.com/read/28318060/integrating-postural-and-vestibular-dimensions-to-depict-impairment-in-moderate-to-severe-obstructive-sleep-apnea-syndrome-patients
#6
Alessandro Micarelli, Claudio Liguori, Andrea Viziano, Francesca Izzi, Fabio Placidi, Marco Alessandrini
Vestibular dysfunction was linked to moderate-to-severe obstructive sleep apnea syndrome (OSAS) patients in literature. However, due to a lack of knowledge among valid and recent implementations conceived to study postural control on static posturography (SP) and vestibulo-ocular reflex (VOR) gain under physiological conditions (video Head Impulse Test; vHIT), the aim of this work was to integrate (i) VOR changes via vHIT implementation, (ii) postural arrangement by studying both classical parameters and frequency spectra (PS) and (iii) correlation between these findings, polygraphic (PG) and subjective scores along Dizziness Handicap Inventory (DHI) and Epworth Sleepiness Scale (ESS)...
March 20, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28306640/cervical-alignment-variations-in-different-postures-and-predictors-of-normal-cervical-kyphosis-a-new-understanding
#7
Hwee Weng Dennis Hey, Eugene Tze-Chun Lau, Chengyuan Gordon Wong, Kimberly-Anne Tan, Gabriel Ka-Po Liu, Hee-Kit Wong
STUDY DESIGN: Prospective comparative study OBJECTIVE.: To predict physiological alignment of the cervical spine and study its morphology in different postures. SUMMARY OF BACKGROUND DATA: There is increasing evidence that normal cervical spinal alignment may vary from lordosis to neutral to kyphosis, or form S-shaped or reverse S-shaped curves. METHODS: Standing, erect sitting and natural sitting whole spine radiographs were obtained from 26 consecutive patients without cervical spine pathology...
March 16, 2017: Spine
https://www.readbyqxmd.com/read/28301984/comparisons-of-ergonomic-evaluation-tools-alla-rula-reba-and-owas-for-farm-work
#8
Yong-Ku Kong, Sung-Yong Lee, Kyung-Suk Lee, Dae-Min Kim
INTRODUCTION: The purpose of this study was to validate the agricultural lower limb assessment (ALLA) ergonomics checklist, which was developed for various agricultural tasks in Korea. METHODS: 196 working postures were selected from the real agricultural tasks to verify ALLA, a lower limb body posture assessment tool, and then evaluated by 16 ergonomic experts. Hit rate, quadratic weighted κ, one-way analysis of variance, and t test analyses were applied to compare ALLA with other assessment tools...
March 17, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/28299643/retention-of-the-first-trial-effect-in-gait-slip-among-community-living-older-adults
#9
Xuan Liu, Tanvi Bhatt, Shuaijie Wang, Feng Yang, Yi-Chung Clive Pai
"First-trial effect" characterizes the rapid adaptive behavior that changes the performance outcome (from fall to non-fall) after merely a single exposure to postural disturbance. The purpose of this study was to investigate how long the first-trial effect could last. Seventy-five (≥ 65 years) community-dwelling older adults, who were protected by an overhead full body harness system, were retested for a single slip 6-12 months after their initial exposure to a single gait-slip. Subjects' body kinematics that was used to compute their proactive (feedforward) and reactive (feedback) control of stability was recorded by an eight-camera motion analysis system...
February 2017: Geroscience
https://www.readbyqxmd.com/read/28295943/wrong-postural-hygiene-and-ergonomics-in-dental-students-of-the-university-of-valencia-spain-part-i
#10
J Cervera-Espert, A Pascual-Moscardó, I Camps-Alemany
INTRODUCTION: Failure to adopt a correct working posture can lead to occupational diseases. OBJECTIVES: Evaluate knowledge in relation to ergonomics about BHOP concept and its application to routine clinical practice amongst undergraduate and postgraduate dental students in the University of Valencia (Valencia, Spain). MATERIAL AND METHODS: A study based on interviews of undergraduate and postgraduate dental students in the University of Valencia (Valencia, Spain) was carried out...
March 14, 2017: European Journal of Dental Education: Official Journal of the Association for Dental Education in Europe
https://www.readbyqxmd.com/read/28293869/an-intelligent-body-posture-analysis-model-using-multi-sensors-for-long-term-physical-rehabilitation
#11
Chin-Feng Lai, Ren-Hung Hwang, Ying-Hsun Lai
Sensors can be installed on various body parts to provide information for computer diagnosis to identify the current body state. However, as human posture is subject to gravity, the direction of the force on each limb differs. For example, the directions of gravitational force on legs and trunk differ. In addition, each person's height and structure of limbs differs, hence, the acceleration and rotation resulted from such differences on force and length of the limbs of a person in motion would be different, and be presented by cases of different postures...
April 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28292716/effect-of-whole-body-vibration-on-center-of-mass-movement-during-standing-in-children-and-young-adults
#12
Huaqing Liang, Matthew Beerse, Xiang Ke, Jianhua Wu
Whole body vibration (WBV) can affect postural control and muscular activation. The purpose of this study was to investigate the center-of-mass (COM) movement of children and young adults before, during, immediately after, and 5min after 40-s WBV in quiet standing. Fourteen young adults (mean age 24.5 years) and fourteen children (mean age 8.1 years) participated in the study. A full-body 35-marker set was placed on the participants and used to calculate COM. Forty-second standing trials were collected before, during, immediately after, and 5min after WBV with an frequency of 28Hz and an amplitude of <1mm...
March 8, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28290764/twelve-week-exercise-influences-memory-complaint-but-not-memory-performance-in-older-adults-a-randomized-controlled-study
#13
Enzo Iuliano, Giovanni Fiorilli, Giovanna Aquino, Alfonso Di Costanzo, Giuseppe Calcagno, Alessandra di Cagno
This study aimed to evaluate the effects of different types of exercise on memory performance and memory complaint after 12-week intervention. Eighty community-dwelling volunteers, aged 66.96 ± 11.73 years, were randomly divided into four groups: resistance, cardiovascular, postural and control groups (20 participants for each group). All participants were tested for their cognitive functions before and after their respective 12-weeks intervention using Rey memory words test, Prose memory test, and Memory Complaint Questionnaire (MAC-Q)...
March 14, 2017: Journal of Aging and Physical Activity
https://www.readbyqxmd.com/read/28286774/orthostatic-intolerance-and-postural-orthostatic-tachycardia-syndrome-in-joint-hypermobility-syndrome-ehlers-danlos-syndrome-hypermobility-type-neurovegetative-dysregulation-or-autonomic-failure
#14
Claudia Celletti, Filippo Camerota, Marco Castori, Federica Censi, Laura Gioffrè, Giovanni Calcagnini, Stefano Strano
Background. Joint hypermobility syndrome/Ehlers-Danlos syndrome, hypermobility type (JHS/EDS-HT), is a hereditary connective tissue disorder mainly characterized by generalized joint hypermobility, skin texture abnormalities, and visceral and vascular dysfunctions, also comprising symptoms of autonomic dysfunction. This study aims to further evaluate cardiovascular autonomic involvement in JHS/EDS-HT by a battery of functional tests. Methods. The response to cardiovascular reflex tests comprising deep breathing, Valsalva maneuver, 30/15 ratio, handgrip test, and head-up tilt test was studied in 35 JHS/EDS-HT adults...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28284667/center-of-pressure-and-center-of-mass-behavior-during-gait-initiation-on-inclined-surfaces-a-statistical-parametric-mapping-analysis
#15
Marcus Fraga Vieira, Ademir Alves de Brito, Georgia Cristina Lehnen, Fábio Barbosa Rodrigues
This study analyzed gait initiation (GI) on inclined surfaces with 68 young adult subjects of both sexes. Ground reaction forces and moments were collected using two AMTI force platforms, of which one was in a horizontal position and the other was inclined by 8% in relation to the horizontal plane. Departing from a standing position, each participant executed three trials in the following conditions: horizontal position (HOR), inclined position at ankle dorsi-flexion (UP), and inclined position at ankle plantar-flexion (DOWN)...
February 27, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28283174/real-time-rula-assessment-using-kinect-v2-sensor
#16
Vito Modesto Manghisi, Antonio Emmanuele Uva, Michele Fiorentino, Vitoantonio Bevilacqua, Gianpaolo Francesco Trotta, Giuseppe Monno
The evaluation of the exposure to risk factors in workplaces and their subsequent redesign represent one of the practices to lessen the frequency of work-related musculoskeletal disorders. In this paper we present K2RULA, a semi-automatic RULA evaluation software based on the Microsoft Kinect v2 depth camera, aimed at detecting awkward postures in real time, but also in off-line analysis. We validated our tool with two experiments. In the first one, we compared the K2RULA grand-scores with those obtained with a reference optical motion capture system and we found a statistical perfect match according to the Landis and Koch scale (proportion agreement index = 0...
March 7, 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28281476/objective-ergonomic-risk-assessment-of-wrist-and-spine-with-motion-analysis-technique-during-simulated-laparoscopic-cholecystectomy-in-experienced-and-novice-surgeons
#17
Twinkle Yogesh Dabholkar, Sujata Sudhir Yardi, Sanjay Narahari Oak, Sneha Ramchandani
INTRODUCTION: There is a rise in prevalence of work-related musculoskeletal disorders in surgeons performing laparoscopic surgeries due to lack of ergonomic considerations to the minimal access surgical environment. The objective of this study was to assess the physical ergonomics in experienced and novice surgeons during a simulated laparoscopic cholecystectomy. METHODOLOGY: Thirty-two surgeons participated in this study and were distributed in two groups (experienced and novices) based on the inclusion criteria...
April 2017: Journal of Minimal Access Surgery
https://www.readbyqxmd.com/read/28280936/thermoregulation-of-the-bovine-scrotum-1-measurements-of-free-range-animals-in-a-paddock-and-pen
#18
Andrea L Wallage, S D Johnston, A T Lisle, L Beard, A M Lees, C W Collins, J B Gaughan
The bull's scrotum and scrotal cord vasculature has traditionally been regarded as a thermoregulatory device for maintaining optimal testicular temperature for normal spermatogenesis. This assumption has mostly been derived from discrete measurements using thermocouples with limited data correlating continuous scrotal temperature (ST) to body temperature (BT). From mid-summer to early autumn, four Wagyu bulls (9-18 months) were surgically implanted with two data loggers (DL) logging at 30 min intervals: one on the right hand side flank and the other was attached to the visceral vaginal tunic of the mid-testis...
March 9, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28280382/retention-of-finger-blood-flow-against-postural-change-as-an-indicator-of-successful-sympathetic-block-in-the-upper-limb
#19
Toshihiko Nakatani, Tatsuya Hashimoto, Ichiro Sutou, Yoji Saito
BACKGROUND: Sympathetic block in the upper limb has diagnostic, therapeutic and prognostic utility for disorders in the upper extremity that are associated with sympathetic disturbances. Increased skin temperature and decreased sweating are used to identify the adequacy of sympathetic block in the upper limb after stellate ganglion block (SGB). Baroreflexes elicited by postural change induce a reduction in peripheral blood flow by causing sympathetic vasoconstriction. We hypothesized that sympathetic block in the upper limb reduces the decrease in finger blood flow caused by baroreflexes stimulated by postural change from the supine to long sitting position...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28279850/accuracy-and-repeatability-of-single-pose-calibration-of-inertial-measurement-units-for-whole-body-motion-analysis
#20
Xavier Robert-Lachaine, Hakim Mecheri, Christian Larue, André Plamondon
Portable inertial measurement units (IMUs) are suitable for motion analysis outside the laboratory. However, IMUs depend on the calibration of each body segment to measure human movement. Different calibration approaches have been developed for simplicity of use or similarity to laboratory motion analysis, but they have not been extensively examined. The main objective of the study was to determine the accuracy and repeatability of two common single-pose calibrations (N-pose and T-pose) under different conditions of placement (self-placement and passive placement), as well as their similarity to laboratory analysis based on anatomical landmarks...
March 1, 2017: Gait & Posture
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