The relationship between multiscale dynamics in tremulous motion of upper limb when aiming and aiming performance in different physical load conditions

2019 ◽  
Vol 37 (22) ◽  
pp. 2625-2630
Author(s):  
Dapeng Bao ◽  
Yan Chen ◽  
Hao Yue ◽  
Jue Zhang ◽  
Yang Hu ◽  
...  
Keyword(s):  
Upper Limb ◽  
Physical Load ◽  
Multiscale Dynamics ◽  
The Relationship ◽  
Aiming Performance ◽  
Load Conditions

The Relationship between Consistency of Propulsive Cycles and Maximum Angular Velocity during Wheelchair Racing

2008 ◽  
Vol 24 (3) ◽  
pp. 280-287 ◽  
Author(s):  
Yong “Tai” Wang ◽  
Konstantinos Dino Vrongistinos ◽  
Dali Xu
Keyword(s):  
Angular Velocity ◽  
Upper Limb ◽  
Wheelchair Propulsion ◽  
Upper Arm ◽  
Wheelchair Athletes ◽  
Angular Velocities ◽  
Limb Kinematics ◽  
Analysis System ◽  
The Right ◽  
The Relationship

The purposes of this study were to examine the consistency of wheelchair athletes’ upper-limb kinematics in consecutive propulsive cycles and to investigate the relationship between the maximum angular velocities of the upper arm and forearm and the consistency of the upper-limb kinematical pattern. Eleven elite international wheelchair racers propelled their own chairs on a roller while performing maximum speeds during wheelchair propulsion. A Qualisys motion analysis system was used to film the wheelchair propulsive cycles. Six reflective markers placed on the right shoulder, elbow, wrist joints, metacarpal, wheel axis, and wheel were automatically digitized. The deviations in cycle time, upper-arm and forearm angles, and angular velocities among these propulsive cycles were analyzed. The results demonstrated that in the consecutive cycles of wheelchair propulsion the increased maximum angular velocity may lead to increased variability in the upper-limb angular kinematics. It is speculated that this increased variability may be important for the distribution of load on different upper-extremity muscles to avoid the fatigue during wheelchair racing.

scholarly journals Development of Upper-Limb Assist Suit for Reduction Physical Load in Leaf Photosynthesis Measurement

2020 ◽  
pp. 185-190
Author(s):  
Toshitake Araie ◽  
◽  
Ikeda Tomozumi ◽  
Akira Kakimoto ◽  
Shunsuke Adachi ◽  
...  
Keyword(s):  
High Risk ◽  
Upper Limb ◽  
Photosynthetic Capacity ◽  
Evaluation Methods ◽  
The Body ◽  
Physical Load ◽  
Leaf Photosynthesis ◽  
Measuring Device ◽  
Risk Of Injury ◽  
Work Posture

Agricultural tasks result in significant strain on the arms, thereby necessitating posture support. One such task is measuring the photosynthetic capacity of individual leaves. This task requires the operator to hold a measuring device for long periods, which is physically demanding. This study aims to develop an assist suit to reduce the physical load involved in photosynthesis measurement work. We used work posture evaluation methods to quantify the workload of this task and identified the parts of the body at high-risk of injury. Then, we designed an assist suit based on the required specifications and verified its effectiveness.

scholarly journals Unobtrusive Estimation of Cardiovascular Parameters with Limb Ballistocardiography

Sensors ◽  
2019 ◽  
Vol 19 (13) ◽  
pp. 2922 ◽  
Author(s):  
Yang Yao ◽  
Sungtae Shin ◽  
Azin Mousavi ◽  
Chang-Sei Kim ◽  
Lisheng Xu ◽  
...  
Keyword(s):  
Upper Limb ◽  
Lower Limb ◽  
Linear Regression Analysis ◽  
Peripheral Resistance ◽  
Physiological Mechanism ◽  
Multivariate Linear Regression Analysis ◽  
Time Intervals ◽  
Processing Procedure ◽  
Characteristic Features ◽  
The Relationship

This study investigates the potential of the limb ballistocardiogram (BCG) for unobtrusive estimation of cardiovascular (CV) parameters. In conjunction with the reference CV parameters (including diastolic, pulse, and systolic pressures, stroke volume, cardiac output, and total peripheral resistance), an upper-limb BCG based on an accelerometer embedded in a wearable armband and a lower-limb BCG based on a strain gauge embedded in a weighing scale were instrumented simultaneously with a finger photoplethysmogram (PPG). To standardize the analysis, the more convenient yet unconventional armband BCG was transformed into the more conventional weighing scale BCG (called the synthetic weighing scale BCG) using a signal processing procedure. The characteristic features were extracted from these BCG and PPG waveforms in the form of wave-to-wave time intervals, wave amplitudes, and wave-to-wave amplitudes. Then, the relationship between the characteristic features associated with (i) the weighing scale BCG-PPG pair and (ii) the synthetic weighing scale BCG-PPG pair versus the CV parameters, was analyzed using the multivariate linear regression analysis. The results indicated that each of the CV parameters of interest may be accurately estimated by a combination of as few as two characteristic features in the upper-limb or lower-limb BCG, and also that the characteristic features recruited for the CV parameters were to a large extent relevant according to the physiological mechanism underlying the BCG.

The relationship between upper limb activity and impairment in post-stroke hemiplegia

2009 ◽  
Vol 31 (2) ◽  
pp. 109-117 ◽  
Author(s):  
Jane H. Burridge ◽  
Ruth Turk ◽  
Scott V. Notley ◽  
Ruth M. Pickering ◽  
David M. Simpson
Keyword(s):  
Upper Limb ◽  
Post Stroke ◽  
The Relationship

scholarly journals Relationship between upper limb motor function and activities of daily living after removing the influence of lower limb motor function in subacute patients with stroke: A cross-sectional study

2020 ◽  
pp. 156918612092660
Author(s):  
Haruka Yamamoto ◽  
Kazuya Takeda ◽  
Soichiro Koyama ◽  
Keisuke Morishima ◽  
Yuichi Hirakawa ◽  
...  
Keyword(s):  
Activities Of Daily Living ◽  
Motor Function ◽  
Upper Limb ◽  
Lower Limb ◽  
Daily Living ◽  
Functional Independence Measure ◽  
Functional Independence ◽  
Motor Score ◽  
Cross Sectional ◽  
The Relationship

Background Previous studies have reported a relationship between upper limb motor function and activities of daily living. However, their relationship after removing the influence of lower limb motor function has not been clarified. Objective This study aimed to investigate the relationship between Fugl-Meyer assessment upper limb and total Functional Independence Measure motor score and between Fugl-Meyer assessment upper limb and each item contained in Functional Independence Measure motor score after eliminating the influence of the motor function of the affected lower limb. Methods This retrospective cross-sectional study included 58 subacute stroke patients. To investigate the relationship between the Fugl-Meyer assessment upper limb and total Functional Independence Measure motor score before and after removing the influence of Fugl-Meyer assessment lower limb, Spearman’s rank correlation coefficient and partial correlation analysis were used. Additionally, the relationship between Fugl-Meyer assessment upper limb and each item of Functional Independence Measure motor score after removing the influence was assessed. Results Before removing the influence of Fugl-Meyer assessment lower limb, Fugl-Meyer assessment upper limb was strongly correlated with total Functional Independence Measure motor score (r = 0.74, p < 0.001). However, it became weak after removing the influence (r = 0.27, p = 0.04). Regarding each item of Functional Independence Measure motor score, Fugl-Meyer assessment upper limb was correlated with grooming (r = 0.27, p = 0.04), bathing (r = 0.28, p = 0.03), dressing upper body (r = 0.33, p = 0.01), dressing lower body (r = 0.31, p = 0.02), and stair-climbing (r = 0.31, p = 0.02) after removing the influence. Conclusion These findings suggest that the relationship between the upper limb motor function and activities of daily living is strongly influenced by lower limb motor function.

scholarly journals Upper limb robotic assessment: Pilot study comparing velocity dependent resistance in individuals with acquired brain injury to healthy controls

2020 ◽  
Vol 7 ◽  
pp. 205566832092953
Author(s):  
Nitin Seth ◽  
Denise Johnson ◽  
Brian Allen ◽  
Hussein A Abdullah
Keyword(s):  
Brain Injury ◽  
Upper Limb ◽  
Sagittal Plane ◽  
Acquired Brain Injury ◽  
Rehabilitation Robotics ◽  
Healthy Controls ◽  
Clinical Scales ◽  
The Relationship ◽  
Further Development ◽  
Flexion And Extension

Introduction Assessment of velocity dependent resistance (VDR) can provide insights into spasticity in individuals with upper motor neuron syndrome. This study investigates the relationship between Modified Ashworth scores and a biomechanical based representation of VDR using a rehabilitation robot. Comparisons in VDR are made for the upper limb (UL) between individuals with acquired brain injury and healthy controls for the para-sagittal plane. Methods The system manipulates the individual’s limb through five flexion and extension motions at increasing speeds to obtain force profiles at different velocities. An approximation of VDR is calculated and analyzed statistically against clinical scales and tested for interactions. Results All individuals (aged 18–65), including healthy controls exhibited VDR greater than 0 (P < 0.05). MAS scores were found to be related to VDR (P < 0.05) with an interaction found between MAS Bicep and Tricep scores (P < 0.01). Considering this interaction, evidence of differences in VDR were found between several neighboring assessment score combinations. Conclusion The robot can detect and quantify VDR that captures information relevant to UL spasticity. Results suggests a better categorization of VDR is possible and supports further development of rehabilitation robotics for assisting spasticity assessment.

scholarly journals Relationship Between Clinical Measures of Upper Limb Movement Quality and Activity Poststroke

2019 ◽  
Vol 33 (6) ◽  
pp. 432-441 ◽  
Author(s):  
Mindy F. Levin ◽  
Vimonwan Hiengkaew ◽  
Yongchai Nilanont ◽  
Donna Cheung ◽  
David Dai ◽  
...  
Keyword(s):  
Upper Limb ◽  
Controlled Trial ◽  
Motor Impairment ◽  
Limb Movement ◽  
Reach To Grasp ◽  
Cross Sectional ◽  
Movement Quality ◽  
Performance Time ◽  
Multicenter Randomized Controlled Trial ◽  
The Relationship

Background. Understanding the relationship between movement quality (impairment) and performance (activity) in poststroke patients is important for rehabilitation intervention studies. This has led to an interest in kinematic characterization of upper limb motor impairment. Since instrumented motion analysis is not readily clinically available, observational kinematics may be a viable alternative. Objective. To determine if upper limb movement quality during a reach-to-grasp task identified by observation could be used to describe the relationship between motor impairments and the time to perform functional tasks. Methods. Cross-sectional, secondary analysis of baseline data from 141 participants with stroke, age 18 to 85 years, who participated in a multicenter randomized controlled trial. Clinical assessment of movement quality using the Reaching Performance Scale for Stroke (RPSS–Close and Far targets) and of performance (activity) from the Wolf Motor Function Test (WMFT–7 items) was assessed. The degree to which RPSS component scores explained scores on WMFT items was determined by multivariable regression. Results. Clinically significant decreases (>2 seconds) in performance time for some of the more complex WMFT tasks involving prehension were predicted from RPSS–Close and Far target components. Trunk compensatory movements did not predict either increases or decreases in performance time for the WMFT tasks evaluated. Overall, the strength of the regression models was low. Conclusions. In lieu of kinematic analysis, observational clinical movement analysis may be a valid and accessible method to determine relationships between motor impairment, compensations and upper limb function in poststroke patients. Specific relationships are unlikely to generalize to all tasks due to kinematic redundancy and task specificity.

scholarly journals Constructs of health belief and disabling distal upper limb pain

2016 ◽  
Vol 13 (1) ◽  
pp. 91-97 ◽  
Author(s):  
Daniel Whibley ◽  
Ross MacDonald ◽  
Gary J. Macfarlane ◽  
Gareth T. Jones
Keyword(s):  
Health Beliefs ◽  
Upper Limb ◽  
Health Belief ◽  
Cross Sectional Study ◽  
Pain Severity ◽  
Clinical Population ◽  
Sectional Study ◽  
Cross Sectional ◽  
Arm Pain ◽  
The Relationship

AbstractBackgroundMusculoskeletal pain in the distal upper limb is common and is a cause of disability and healthcare consultation. At the time of presentation individuals reporting similar pain severities may report different levels of related disability. The biopsychosocial model proposes that health beliefs may help explain this difference. The aim of this cross-sectional study was to identify underlying constructs of health belief in those referred to physiotherapy with pain in the distal upper limb and investigate whether these constructs moderated the relationship between pain severity and extent of disability.MethodHealth beliefs were assessed using an instrument included in a questionnaire completed before randomisation to the Arm Pain Trial (ISRCTN79085082). Ordinal responses to statements about health beliefs were used to generate a polychoric correlation matrix. The output from this matrix was then used for Exploratory Factor Analysis to determine underlying constructs. The moderating influence of the identified health belief constructs was then tested using interaction terms in linear regression models.Results476 trial participants contributed data, age range 18–85 (mean 48.8, SD 13.7), 54% female. Five health belief constructs were identified: beliefs about hereditary factors, beliefs about movement and pain, beliefs about locus of control, beliefs about the role of lifecourse/lifestyle factors, and beliefs about prognosis. The only health belief construct found to moderate the pain-disability relationship was beliefs about prognosis, with greater pessimism resulting in higher levels of disability at mild-to-moderate levels of pain severity (B –0.17,95% CI –0.30, –0.036).ConclusionThis exploratory cross-sectional study identified five constructs of health belief from responses to a previously used set of statements investigating fear avoidance and illness beliefs in a clinical population with pain in the distal upper limb. Of these constructs, beliefs about prognosis were found to moderate the relationship between pain and disability.ImplicationsAt the time of referral to physiotherapy it may be beneficial to assess patients’ perception of prognosis. For those with higher than expected disability for the presenting level of pain, and pessimism about prognosis, focused reassurance may play an important part in initial consultation. Longitudinal study is required to support the findings from this study and investigate whether a causal relationship exists. Future investigations should confirm the health belief constructs proposed.

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