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https://www.readbyqxmd.com/read/28535432/water-depth-effects-on-impact-loading-kinematic-and-physiological-variables-during-water-treadmill-running
#1
Paul W Macdermid, Josh Wharton, Carina Schill, Philip W Fink
PURPOSE: The purpose of this study was to compare impact loading, kinematic and physiological responses to three different immersion depths (mid-shin, mid-thigh, and xiphoid process) while running at the same speed on a water based treadmill. METHODS: Participants (N=8) ran on a water treadmill at three depths for 3min. Tri-axial accelerometers were used to identify running dynamics plus measures associated with impact loading rates, while heart rate data were logged to indicate physiological demand...
May 17, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28533981/effects-of-knee-sleeves-on-coordination-of-lower-limb-segments-in-healthy-adults-during-level-walking-and-one-leg-hopping
#2
Chang-Yong Ko, Yunhee Chang, Bora Jeong, Sungjae Kang, Jeicheong Ryu, Gyoosuk Kim
The evaluation of multisegment coordination is important in gaining a better understanding of the gait and physical activities in humans. Therefore, this study aims to verify whether the use of knee sleeves affects the coordination of lower-limb segments during level walking and one-leg hopping. Eleven healthy male adults participated in this study. They were asked to walk 10 m on a level ground and perform one-leg hops with and without a knee sleeve. The segment angles and the response velocities of the thigh, shank, and foot were measured and calculated by using a motion analysis system...
2017: PeerJ
https://www.readbyqxmd.com/read/28530503/comparison-of-self-selected-walking-speeds-and-walking-speed-variability-when-data-are-collected-during-repeated-discrete-trials-and-during-continuous-walking
#3
Marcus J Brown, Laura A Hutchinson, Michael J Rainbow, Kevin J Deluzio, Alan R De Asha
A typical gait analysis data collection consists of a series of discrete trials, where a participant initiates gait, walks through a motion capture volume, and then terminates gait. This is not a normal 'everyday' gait pattern, yet measurements are considered representative of normal walking. However, walking speed, a global descriptor of gait quality that can affect joint kinematics and kinetics, may be different during discrete trials, compared to continuous walking. Therefore, the purpose of this study was to investigate the effect of continuous walking versus discrete trials on walking speed and walking speed variability...
May 22, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/28526584/a-simple-algorithm-to-predict-falls-in-primary-care-patients-aged-65-to-74%C3%A2-years-the-international-mobility-in-aging-study
#4
Fernando Gomez, Yan Yan Wu, Mohammad Auais, Afshin Vafaei, Maria-Victoria Zunzunegui
OBJECTIVE: Primary care practitioners need simple algorithms to identify older adults at higher risks of falling. Classification and regression tree (CaRT) analyses are useful tools for identification of clinical predictors of falls. DESIGN: Prospective cohort. SETTING: Community-dwelling older adults at 5 diverse sites: Tirana (Albania), Natal (Brazil), Manizales (Colombia), Kingston (Ontario, Canada), and Saint-Hyacinthe (Quebec, Canada)...
May 16, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28511263/diagnosis-and-treatment-of-functional-psychogenic-parkinsonism
#5
Kathrin LaFaver, Alberto J Espay
Functional (psychogenic) parkinsonism (FP) is recognized by the mandatory combination of marked slowness without progressive decrement on repetitive manual tasks and variable resistance against passive movements in the absence of cogwheel rigidity. Other functional phenotypes, such as functional tremor and functional gait impairment, may coexist. Although neither necessary nor sufficient for the diagnosis of FP, supportive historical clues include the sudden onset of symptoms and absent or nonphysiologic response to levodopa...
April 2017: Seminars in Neurology
https://www.readbyqxmd.com/read/28509934/the-role-of-the-prefrontal-cortex-in-freezing-of-gait-in-parkinson-s-disease-insights-from-a-deep-repetitive-transcranial-magnetic-stimulation-exploratory-study
#6
Moria Dagan, Talia Herman, Anat Mirelman, Nir Giladi, Jeffrey M Hausdorff
Freezing of Gait (FOG) is one of the most debilitating gait impairments in Parkinson's disease (PD), leading to increased fall risk and reduced health-related quality of life. The utility of parkinsonian medications is often limited in the case of FOG and it frequently becomes dopamine resistant. Recent studies have suggested that pre-frontal cortex (PFC) dysfunction contributes to FOG; however, most previous findings provide only indirect evidence. To better understand the role of the PFC, we aimed to investigate the impact of high frequency, deep, repetitive transcranial magnetic stimulation (drTMS) of the medial PFC on FOG and its mediators...
May 16, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28505982/factors-contributing-to-perceived-walking-difficulties-in-people-with-parkinson-s-disease
#7
Manzur Kader, Susann Ullén, Susanne Iwarsson, Per Odin, Maria H Nilsson
BACKGROUND: While walking difficulties are common in people with Parkinson's disease (PD), little is known about factors that independently contribute to their perceived walking difficulties. OBJECTIVE: To identify factors that independently contribute to perceived walking difficulties in people with PD. METHODS: This study involved 243 (62% men) participants; their mean (min-max) age and PD duration were 70 (45-93) and 8 (1-43) years, respectively...
May 9, 2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28505546/quantifying-sources-of-variability-in-gait-analysis
#8
Kohleth Chia, Morgan Sangeux
Measurements from gait analysis are affected by many sources of variability. Schwartz et al. [1] illustrated an experimental design and methods to estimate these variance components. However, the derivation contains errors which could severely bias the estimation of some components. Therefore, in this paper, we presented correction to this method using ANOVA and Likelihood methods. Furthermore, we demonstrated how commonly used reliability indices like CMC and ICC may be derived from the variance components...
May 3, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28505243/association-of-dual-task-gait-with-incident-dementia-in-mild-cognitive-impairment-results-from-the-gait-and-brain-study
#9
Manuel M Montero-Odasso, Yanina Sarquis-Adamson, Mark Speechley, Michael J Borrie, Vladimir C Hachinski, Jennie Wells, Patricia M Riccio, Marcelo Schapira, Ervin Sejdic, Richard M Camicioli, Robert Bartha, William E McIlroy, Susan Muir-Hunter
Importance: Gait performance is affected by neurodegeneration in aging and has the potential to be used as a clinical marker for progression from mild cognitive impairment (MCI) to dementia. A dual-task gait test evaluating the cognitive-motor interface may predict dementia progression in older adults with MCI. Objective: To determine whether a dual-task gait test is associated with incident dementia in MCI. Design, Setting, and Participants: The Gait and Brain Study is an ongoing prospective cohort study of community-dwelling older adults that enrolled 112 older adults with MCI...
May 15, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28504943/towards-multimodal-human-robot-interaction-to-enhance-active-participation-of-users-in-gait-rehabilitation
#10
Kai Gui, Honghai Liu, Dingguo Zhang
Robotic exoskeletons for physical rehabilitation have been utilized for retraining patients suffering from paraplegia and enhancing motor recovery in recent years. However, users are not voluntarily involved in most systems. This work aims to develop a locomotion trainer with multiple gait patterns, which can be controlled by the active motion intention of users. A multimodal human-robot interaction (HRI) system is established to enhance subject's active participation during gait rehabilitation, which includes cognitive human-robot interaction (cHRI) and physical human-robot interaction (pHRI)...
May 11, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28503379/a-public-dataset-of-running-biomechanics-and-the-effects-of-running-speed-on-lower-extremity-kinematics-and-kinetics
#11
Reginaldo K Fukuchi, Claudiane A Fukuchi, Marcos Duarte
BACKGROUND: The goals of this study were (1) to present the set of data evaluating running biomechanics (kinematics and kinetics), including data on running habits, demographics, and levels of muscle strength and flexibility made available at Figshare (DOI: 10.6084/m9.figshare.4543435); and (2) to examine the effect of running speed on selected gait-biomechanics variables related to both running injuries and running economy. METHODS: The lower-extremity kinematics and kinetics data of 28 regular runners were collected using a three-dimensional (3D) motion-capture system and an instrumented treadmill while the subjects ran at 2...
2017: PeerJ
https://www.readbyqxmd.com/read/28503144/rigid-ankle-foot-orthosis-deteriorates-mediolateral-balance-control-and-vertical-braking-during-gait-initiation
#12
Arnaud Delafontaine, Olivier Gagey, Silvia Colnaghi, Manh-Cuong Do, Jean-Louis Honeine
Rigid ankle-foot orthoses (AFO) are commonly used for impeding foot drop during the swing phase of gait. They also reduce pain and improve gait kinematics in patients with weakness or loss of integrity of ankle-foot complex structures due to various pathological conditions. However, this comes at the price of constraining ankle joint mobility, which might affect propulsive force generation and balance control. The present study examined the effects of wearing an AFO on biomechanical variables and electromyographic activity of tibialis anterior (TA) and soleus muscles during gait initiation (GI)...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28499954/systematic-review-and-meta-analysis-of-gait-mechanics-in-young-and-older-adults
#13
Katherine A Boyer, Russell T Johnson, Jacob J Banks, Carl Jewell, Jocelyn F Hafer
BACKGROUND: Age-related gait changes may play a critical role in functional limitations of older adults. Despite sizable interest in determining how age alters walking mechanics, small sample sizes and varied outcome measures have precluded a comprehensive understanding of the impact of age on lower extremity joint kinematics and kinetics. OBJECTIVE: The aim of this study was to perform a systematic review and meta-analysis of the aging gait mechanics literature...
May 9, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28496986/a-case-of-stiff-dog-syndrome-associated-with-anti-glutamic-acid-decarboxylase-antibodies
#14
Theresa E Pancotto, John H Rossmeisl
BACKGROUND: The stiff person syndrome (SPS) is a rare and debilitating autoimmune disorder with an unknown pathogenesis and variable clinical presentation that can present a diagnostic challenge. Although entities that clinically mimic stiff-person spectrum disorders (SPSD) have manifested in horses, they have not been reported in dogs. CASE PRESENTATION: We describe a 2-year-old beagle dog presented for progressive attacks of muscular rigidity and lordosis with superimposed spasms of the appendicular muscles triggered by tactile stimulation which resulted in marked gait impairment...
2017: Journal of Clinical Movement Disorders
https://www.readbyqxmd.com/read/28495045/deterioration-in-gait-and-functional-ambulation-in-children-and-adolescents-with-charcot-marie-tooth-disease-over-12-months
#15
Rachel Kennedy, Kate Carroll, Kade L Paterson, Monique M Ryan, Jennifer L McGinley
Children and adolescents with Charcot-Marie-Tooth disease (CMT) report problems with gait. Little is known about gait changes over time in children with this degenerative disease. This prospective longitudinal study investigated change in spatio-temporal gait parameters and functional ambulation. Two assessments were conducted 12 months apart. Assessments included: barefoot gait on an electronic walkway; functional ambulation with a six minute walk test and the Functional Mobility Scale; and disease severity with the CMT Pediatric Scale...
April 19, 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28494322/constituent-lower-extremity-work-clew-approach-a-novel-tool-to-visualize-joint-and-segment-work
#16
Anahid Ebrahimi, Saryn R Goldberg, Jason M Wilken, Steven J Stanhope
Work can reveal the mechanism by which movements occur. However, work is less physically intuitive than more common clinical variables such as joint angles, and are scalar quantities which do not have a direction. Therefore, there is a need for a clearly reported and comprehensively calculated approach to easily visualize and facilitate the interpretation of work variables in a clinical setting. We propose the Constituent Lower Extremity Work (CLEW) approach, a general methodology to visualize and interpret cyclic tasks performed by the lower limbs...
April 24, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28493868/vertical-ground-reaction-force-marker-for-parkinson-s-disease
#17
Md Nafiul Alam, Amanmeet Garg, Tamanna Tabassum Khan Munia, Reza Fazel-Rezai, Kouhyar Tavakolian
Parkinson's disease (PD) patients regularly exhibit abnormal gait patterns. Automated differentiation of abnormal gait from normal gait can serve as a potential tool for early diagnosis as well as monitoring the effect of PD treatment. The aim of current study is to differentiate PD patients from healthy controls, on the basis of features derived from plantar vertical ground reaction force (VGRF) data during walking at normal pace. The current work presents a comprehensive study highlighting the efficacy of different machine learning classifiers towards devising an accurate prediction system...
2017: PloS One
https://www.readbyqxmd.com/read/28490249/novel-single-marker-approach-to-estimation-of-lower-extremity-movement
#18
Fateme Navvab Motlagh, Ahmad Reza Arshi
Sacrum motion is used extensively in studying the biomechanical characteristics of walking. This study aimed at investigating the potential of sacrum motion to provide an estimation of important gait events in conjunction with predicting the motion of lower extremity segments. Three-dimensional trajectories of 37 reflective markers placed on anatomical landmarks of 14 healthy subjects were recorded while walking at self-selected normal walking speed on treadmill. Elevation angles of lower extremity segments in sagittal plane were estimated using the lower extremity markers...
May 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28489319/low-physical-activity-as-a-key-differentiating-factor-in-the-potential-high-risk-profile-for-depressive-symptoms-in-older-adults
#19
Sofie Holmquist, Sabina Mattsson, Ingrid Schele, Peter Nordström, Anna Nordström
BACKGROUND: The identification of potential high-risk groups for depression is of importance. The purpose of the present study was to identify high-risk profiles for depressive symptoms in older individuals, with a focus on functional performance. METHODS: The population-based Healthy Ageing Initiative included 2,084 community-dwelling individuals (49% women) aged 70. Explorative cluster analysis was used to group participants according to functional performance level, using measures of basic mobility skills, gait variability, and grip strength...
May 10, 2017: Depression and Anxiety
https://www.readbyqxmd.com/read/28487630/analysis-of-interrelationships-among-voluntary-and-prosthetic-leg-joint-parameters-using-cyclograms
#20
Farahiyah Jasni, Nur Azah Hamzaid, Nor Elleeiana Mohd Syah, Tze Y Chung, Noor Azuan Abu Osman
The walking mechanism of a prosthetic leg user is a tightly coordinated movement of several joints and limb segments. The interaction among the voluntary and mechanical joints and segments requires particular biomechanical insight. This study aims to analyze the inter-relationship between amputees' voluntary and mechanical coupled leg joints variables using cyclograms. From this analysis, the critical gait parameters in each gait phase were determined and analyzed if they contribute to a better powered prosthetic knee control design...
2017: Frontiers in Neuroscience
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