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Gait analysis

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https://www.readbyqxmd.com/read/28329377/time-to-refocus-assessment-of-vision-in-older-adults-contrast-sensitivity-but-not-visual-acuity-is-associated-with-gait-in-older-adults
#1
Eoin Duggan, Orna Donoghue, Rose Anne Kenny, Hilary Cronin, James Loughman, Ciarán Finucane
Background: The relationship between measures of visual function and gait related risk factors for falls is unclear. In this study, we examine the relationship between visual function (visual acuity [VA] and contrast sensitivity [CS] at multiple spatial frequencies) and quantitative spatiotemporal gait, using a large, nationally representative sample of community dwelling older adults. Methods: Participants aged 50 and over were recruited as part of The Irish Longitudinal Study on Ageing (TILDA)...
February 28, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28329339/interrelations-between-mitochondrial-dna-copy-number-and-inflammation-in-older-adults
#2
I-Chien Wu, Cheng-Chieh Lin, Chin-San Liu, Chih-Cheng Hsu, Ching-Yu Chen, Chao A Hsiung
Background: Interplays between inflammation and mitochondrial biology are reported. Here, we examined the cross-sectional interrelationships of mitochondrial DNA copy number (mtDNACN) and inflammation and their interaction with physical functioning. Methods: A total of 1990 community-dwelling adults aged 65 years and older who were participating in the Healthy Aging Longitudinal Study in Taiwan underwent measurements of peripheral-blood leukocytes MtDNACN, multiple inflammatory markers, grip strength, and gait speed...
March 11, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28329158/kidney-function-estimated-from-cystatin-c-but-not-creatinine-is-related-to-objective-tests-of-physical-performance-in-community-dwelling-older-adults
#3
Mark Canney, Donal J Sexton, Matthew Dl O'Connell, Rose Anne Kenny, Mark A Little, Conall M O'Seaghdha
Background: The burden of chronic kidney disease is highest among older adults but the significance of a diminished level of kidney function in this heterogeneous population is poorly understood. We sought to examine the relationship between estimated glomerular filtration rate (eGFR) and objective physical performance in older adults. Methods: Cross-sectional analysis of 4,562 participants from The Irish Longitudinal Study on Ageing, a national cohort of community-dwelling adults aged ≥50 years...
March 10, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28328565/control-of-walking-speed-in-children-with-cerebral-palsy
#4
Jon R Davids, Nina Q Cung, Suzy Chen, Mitell Sison-Williamson, Anita M Bagley
BACKGROUND: Children's ability to control the speed of gait is important for a wide range of activities. It is thought that the ability to increase the speed of gait for children with cerebral palsy (CP) is common. This study considered 3 hypotheses: (1) most ambulatory children with CP can increase gait speed, (2) the characteristics of free (self-selected) and fast walking are related to motor impairment level, and (3) the strategies used to increase gait speed are distinct among these levels...
March 21, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28327472/spatiotemporal-treadmill-gait-measurements-using-a-laser-range-scanner-feasibility-study-of-the-healthy-young-adults
#5
S Tanabe, T Ii, S Koyama, E Saitoh, N Itoh, K Ohtsuka, Y Katoh, A Shimizu, Y Tomita
OBJECTIVE: Spatio-temporal parameters are typically used for gait analysis. Although these parameters are measured by sophisticated systems such as 3D motion capture system or optoelectronic bars, these systems cannot be deployed easily because of their high costs, large space requirements and elaborate set-up. The purpose of this study is to develope a system for measuring spatiotemporal gait parameters using a laser range scanner during treadmill gait. APPROACH: To calculate accurate spatiotemporal parameters, the differences between the laser range scanner measured values and the reference values obtained from a 3D motion capture system were investigated in thirty subjects...
March 22, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28327133/improved-knee-biomechanics-among-patients-reporting-a-good-outcome-in-knee-related-quality-of-life-one-year-after-total-knee-arthroplasty
#6
Josefine E Naili, Per Wretenberg, Viktor Lindgren, Maura D Iversen, Margareta Hedström, Eva W Broström
BACKGROUND: It is not well understood why one in five patients report poor outcomes following knee arthroplasty. This study evaluated changes in knee biomechanics, and perceived pain among patients reporting either a good or a poor outcome in knee-related quality of life after total knee arthroplasty. METHODS: Twenty-eight patients (mean age 66 (SD 7) years) were included in this prospective study. Within one month of knee arthroplasty and one year after surgery, patients underwent three-dimensional (3D) gait analysis, completed the Knee Injury and Osteoarthritis Outcome Score (KOOS), and rated perceived pain using a visual analogue scale...
March 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28325033/user-intent-prediction-with-a-scaled-conjugate-gradient-trained-artificial-neural-network-for-lower-limb-amputees-using-a-powered-prosthesis
#7
Richard B Woodward, John A Spanias, Levi J Hargrove
Powered lower limb prostheses have the ability to provide greater mobility for amputee patients. Such prostheses often have pre-programmed modes which can allow activities such as climbing stairs and descending ramps, something which many amputees struggle with when using non-powered limbs. Previous literature has shown how pattern classification can allow seamless transitions between modes with a high accuracy and without any user interaction. Although accurate, training and testing each subject with their own dependent data is time consuming...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324994/co-activation-periods-of-gastrocnemius-and-vastus-lateralis-during-walking-evaluated-by-surface-electromyography
#8
Alessandro Mengarelli, Annachiara Strazza, Agnese Sbrollini, Angela Agostinelli, Laura Burattini, Sandro Fioretti, Francesco Di Nardo
"In vivo" studies reported that the co-activation of gastrocnemius and quadriceps femoris (QF) muscles produces ACL strain values greater than those caused by an isolated activation of either muscle. Aim of this study was to assess the co-activation of gastrocnemius (lateral head, GL) and vastus lateralis (VL) in healthy and young adults during walking. To this purpose the Statistical Gait Analysis was performed, that allows a characterization of gait considering hundreds of strides belonging to the same walking trial...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324993/dynamic-knee-muscle-co-contraction-quantified-during-walking
#9
Annachiara Strazza, Alessandro Mengarelli, Valentina Agostini, Marco Knaflitz, Laura Burattini, Sandro Fioretti, Francesco Di Nardo
The purpose of the present study was the quantification of the co-activation patterns of the knee extensor and flexor muscles during walking at self-selected speed and cadence. To this aim, the Statistical Gait Analysis, a recent methodology providing a statistical characterization of gait, was performed on surface EMG signals from Vastus Lateralis (VL) and Medial Hamstrings (MH) in 14 healthy young adult subjects. Muscular co-contraction was assessed as the overlapping period between activation intervals of agonist and antagonist muscles...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324949/muscle-synergy-analysis-in-transtibial-amputee-during-ramp-ascending-activity
#10
P Mehryar, M S Shourijeh, H F Maqbool, M Torabi, A A Dehghani-Sanij
In developed countries, the highest number of amputees are elderly with transtibial amputation. Walking on inclined surfaces is difficult for amputees due to loss of muscle volume and strength thereby transtibial amputees (TA) rely on the intact limb to maintain stability. The aim of this study was to use the concatenated non-negative matrix factorization (CNMF) technique to calculate muscle synergy components and compare the difference in muscle synergies and their associated activation profiles in the healthy and amputee groups during ramp ascending (RA) activity...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28323871/power-considerations-for-the-application-of-detrended-fluctuation-analysis-in-gait-variability-studies
#11
Nikita A Kuznetsov, Christopher K Rhea
The assessment of gait variability using stochastic signal processing techniques such as detrended fluctuation analysis (DFA) has been shown to be a sensitive tool for evaluation of gait alterations due to aging and neuromuscular disease. However, previous studies have suggested that the application of DFA requires relatively long recordings (600 strides), which is difficult when working with clinical populations or older adults. In this paper we propose a model for predicting DFA variance in experimental data and conduct a Monte Carlo simulation to estimate the sample size and number of trials required to detect a change in DFA scaling exponent...
2017: PloS One
https://www.readbyqxmd.com/read/28323342/inflammatory-markers-and-frailty-in-long-term-care-residents
#12
Gabrielle A Langmann, Subashan Perera, Mary A Ferchak, David A Nace, Neil M Resnick, Susan L Greenspan
OBJECTIVES: To determine whether proinflammatory biomarkers are associated with frailty assessed according to functional status, mobility, mental health, and falls over 24 months. DESIGN: Secondary analysis of a 2-year double-blind clinical trial for osteoporosis. SETTING: Nursing homes and assisted living facilities. PARTICIPANTS: Women aged 65 and older with osteoporosis in long-term care (LTC) (N = 178). MEASUREMENTS: Baseline serum concentrations of proinflammatory cytokines and soluble receptors (high sensitivity C-reactive protein (hs-CRP), tumor necrosis factor alpha (TNFα) and its two receptors (TNFα-R1 and TNFα-R2), interleukin-6 (IL-6), soluble IL-6 receptor (sIL-6R), IL-10), functional status assessed according to activities of daily living, the Nursing Home Physical Performance Test, gait speed, cognitive status, mental health, and falls...
March 21, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28321713/low-titre-gad-antibody-associated-late-onset-cerebellar-ataxia-with-a-significant-clinical-response-to-intravenous-immunoglobulin-treatment
#13
Timotej Petrijan, Marija Menih
Antiglutamic acid decarboxylase antibody-associated cerebellar ataxia (GAD-Abs CA) is a rare, but increasingly detected, autoimmune neurological disorder characterized by the clinical presence of a cerebellar syndrome concomitant with positive GAD-Abs levels in serum and cerebrospinal fluid (CSF). It represents 3% of all immune-mediated sporadic CAs. Low-titre GAD-Abs CA is an even rarer subtype of GAD-Abs CA. We report on a 68-year-old woman with a 3-year history of progressive gait ataxia. In addition to the modified Rankin Scale (mRS), we used two other objective scales to evaluate CA severity, i...
March 20, 2017: Cerebellum
https://www.readbyqxmd.com/read/28320887/hip-region-muscular-dystrophy-and-emergence-of-motor-deficits-in-dysferlin-deficient-bla-j-mice
#14
Nadia Nagy, Randal J Nonneman, Telmo Llanga, Catherine F Dial, Natallia V Riddick, Tom Hampton, Sheryl S Moy, Kimmo K Lehtimäki, Toni Ahtoniemi, Jukka Puoliväli, Hillarie Windish, Douglas Albrecht, Isabelle Richard, Matthew L Hirsch
The identification of a dysferlin-deficient animal model that accurately displays both the physiological and behavior aspects of human dysferlinopathy is critical for the evaluation of potential therapeutics. Disease progression in dysferlin-deficient mice is relatively mild, compared to the debilitating human disease which manifests in impairment of particular motor functions. Since there are no other known models of dysferlinopathy in other species, locomotor proficiency and muscular anatomy through MRI (both lower leg and hip region) were evaluated in dysferlin-deficient B6...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28320506/unexpected-walking-perturbations-reliability-and-validity-of-a-new-treadmill-protocol-to-provoke-muscular-reflex-activities-at-lower-extremities-and-the-trunk
#15
Tilman Engel, Juliane Mueller, Stephan Kopinski, Antje Reschke, Steffen Mueller, Frank Mayer
Instrumented treadmills offer the potential to generate standardized walking perturbations, which are particularly rapid and powerful. However, technical requirements to release adequate perturbations regarding timing, duration and amplitude are demanding. This study investigated the test-retest reliability and validity of a new treadmill perturbation protocol releasing rapid and unexpected belt perturbations to provoke muscular reflex responses at lower extremities and the trunk. Fourteen healthy participants underwent two identical treadmill walking protocols, consisting of 10 superimposed one-sided belt perturbations (100ms duration; 2m/s amplitude), triggered by a plantar pressure insole 200ms after heel contact...
March 4, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28320425/patient-compliance-with-touchdown-weight-bearing-after-microfracture-treatment-of-talar-osteochondral-lesions
#16
Gökhan Polat, Gökhan Karademir, Ekin Akalan, Mehmet Aşık, Mehmet Erdil
BACKGROUND: The aim of this study was to prospectively evaluate the compliance of our patients with a touchdown weight bearing (without supporting any weight on the affected side by only touching the plantar aspect of the foot to the ground to maintain balance to protect the affected side from mechanical loading) postoperative rehabilitation protocol after treatment of talar osteochondral lesion (TOL). METHODS: Fourteen patients, who had been treated with arthroscopic debridement and microfracture, were followed prospectively...
March 20, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28319490/position-between-trunk-and-pelvis-during-gait-depending-on-the-gross-motor-function-classification-system
#17
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/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
#18
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/28318981/idiopathic-intradural-dorsal-thoracic-arachnoid-cysts-a-case-series-and-review-of-the-literature
#19
Heath French, Arjuna Somasundaram, Michael Biggs, Jonathon Parkinson, Rodney Allan, Jonathon Ball, Nicholas Little
BACKGROUND: Spinal intradural arachnoid cysts (SIAC) are cerebrospinal fluid (CSF) filled sacs formed by arachnoid membranes and may be either idiopathic or acquired. Idiopathic cysts represent a separate entity and their aetiology remains uncertain. By far the most difficult differential diagnosis is distinguishing between idiopathic anterior spinal cord herniation (IASCH) and dorsal thoracic intradural arachnoid cysts (TIAC), due to their similarity in radiological appearance. Cine-mode (SSFP) is emerging as a novel technique in the diagnosis and operative planning of SIAC...
March 17, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28318394/effect-of-foot-and-ankle-immobilization-on-able-bodied-gait-as-a-model-to-increase-understanding-about-bilateral-transtibial-amputee-gait
#20
Antonia Nepomuceno, Matthew J Major, Rebecca Stine, Steven Gard
BACKGROUND: The anatomical foot-ankle complex facilitates advancement of the stance limb through foot rockers and late-stance power generation during walking, but this mechanism is altered for persons with bilateral transtibial amputation when using passive prostheses. OBJECTIVES: To study the effects of bilateral foot and ankle immobilization on able-bodied gait to serve as a model for understanding gait of persons with bilateral transtibial amputation and associated compensatory mechanisms...
March 1, 2017: Prosthetics and Orthotics International
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