Exploratory Movement Parameters Vary with Stimulus Stiffness

2008 ◽  
pp. 313-318 ◽  
Author(s):  
Lukas Kaim ◽  
Knut Drewing
Keyword(s):  
Exploratory Movement ◽  
Movement Parameters

Analysis of movement of persons with disabilities during evacuation by lift

2020 ◽  
Vol 15 (1) ◽  
pp. 209-220
Author(s):  
Martin Szénay ◽  
Martin Lopušniak
Keyword(s):  
Computational Models ◽  
Persons With Disabilities ◽  
Entire Process ◽  
Injured Person ◽  
Impaired People ◽  
Movement Parameters ◽  
The Times ◽  
Mobility Impaired

Abstract Lifts are indispensable for the evacuation of mobility-impaired people from buildings in case of emergency. It is necessary to quantify the movement parameters of these people and describe the entire process using a suitable algorithm. The aim of the research was to quantify the times and speeds of movement for a person using a wheelchair and for an injured person. An experiment in situ was used. During the experiment, arrivals at the lift, cabin entries, and exits were monitored. The results include the times and speeds of a mobility-impaired person's movement. The experiments showed that a person using a wheelchair was slower than an injured person. The results can be used to expand computational models to account for the possibility of using lifts for evacuation.

Evaluation of electroacupuncture for symptom modification in a rodent model of spontaneous osteoarthritis

2021 ◽  
pp. 096452842110207
Author(s):  
Alexa P Spittler ◽  
Maryam F Afzali ◽  
Richard B Martinez ◽  
Lauren A Culver ◽  
Sarah E Leavell ◽  
...  
Keyword(s):  
Rodent Model ◽  
Knee Joints ◽  
Control Group ◽  
Disease Modification ◽  
Inflammatory Biomarker ◽  
Knee Oa ◽  
Significant Difference ◽  
Gene Transcripts ◽  
Restricted Mobility ◽  
Movement Parameters

Objective: Faced with the frustration of chronic discomfort and restricted mobility due to osteoarthritis (OA), many individuals have turned to acupuncture for relief. However, the efficacy of acupuncture for OA is uncertain, as much of the evidence is inconclusive. The purpose of this study was to evaluate electroacupuncture (EA) in a rodent model of OA such that conclusions regarding its effectiveness for symptom or disease modification could be drawn. Methods: Ten 12-month-old male Hartley guinea pigs—which characteristically have moderate to advanced OA at this age—were randomly assigned to receive EA for knee OA (n = 5) or anesthesia only (control group, n = 5). Treatments were performed three times weekly for 3 weeks, followed by euthanasia 2 weeks later. Gait analysis and enclosure monitoring were performed weekly to evaluate changes in movement. Serum was collected for inflammatory biomarker testing. Knee joints were collected for histology and gene expression. Results: Animals receiving EA had significantly greater changes in movement parameters compared to those receiving anesthesia only. There was a tendency toward decreased serum protein concentrations of complement component 3 (C3) in the EA group compared to the control group. Structural and antioxidant gene transcripts in articular cartilage were increased by EA. There was no significant difference in total joint histology scores between groups. Conclusion: This study provides evidence that EA has a positive effect on symptom, but not disease, modification in a rodent model of OA. Further investigations into mechanistic pathways that may explain the efficacy of EA in this animal model are needed.

Weather effects on intrahabitat movements of the western green lizard, Lacerta bilineata (Daudin, 1802), at its northern distribution range border: a radio-tracking study

2000 ◽  
Vol 78 (10) ◽  
pp. 1831-1839 ◽  
Author(s):  
P Sound ◽  
M Veith
Keyword(s):  
Activity Patterns ◽  
Strong Dependence ◽  
Weather Conditions ◽  
Distribution Range ◽  
Maximum Temperature ◽  
Second Phase ◽  
Northern Distribution ◽  
Radio Transmitters ◽  
Movement Parameters ◽  
Bad Weather

Daily activity patterns of male western green lizards, Lacerta bilineata (Daudin, 1802), at the edge of their northern distribution range in western Germany after the breeding season from June to October were recorded using implanted radio transmitters. Different activity indices discriminating between stimulation, duration, and length of movement were correlated with actual weather conditions (d0) and with weather conditions on the 2 previous days (d-1 and d-2). The lizards' dependence on weather showed two different phases throughout the study period. During the first period and in the period preceding a drastic change of weather in midsummer, weather had no significant influence on movement parameters. After that event, temperatures dropped and a strong dependence on weather of all movement parameters except those indicating displacements became apparent. Thresholds for 50% activity during this second phase were a maximum temperature of 17°C and a minimum humidity of 35%. Two days after periods of bad weather, the influence of weather conditions increased again. This can be explained by physiological deficits that require compensation during the period of marginal weather conditions prior to hibernation. Displacement movements were significantly longer than home-range movements and were neither triggered nor modulated by the weather. They must therefore represent activities such as patrolling territory boundaries.

Autonomous Doppler radar meter of transport movement parameters

2003 ◽  
Author(s):  
Y.I. Budaretskiy ◽  
A.N. Zubkov ◽  
V.P. Kovalyov ◽  
S.N. Neporada ◽  
I.D. Ladnich
Keyword(s):  
Doppler Radar ◽  
Movement Parameters

scholarly journals Fluoroscopy-guided robotic biopsy intervention system

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Yusuf Özbek ◽  
Michael Vogele ◽  
Christian Plattner ◽  
Pedro Costa ◽  
Mario Griesser ◽  
...  
Keyword(s):  
Percutaneous Biopsy ◽  
Practical Experience ◽  
Imaging Systems ◽  
Robotic Platform ◽  
End Effector ◽  
X Ray ◽  
Needle Path ◽  
Custom Made ◽  
Fluoroscopic Imaging ◽  
Movement Parameters

AbstractFluoroscopy-guided percutaneous biopsy interventions are mostly performed with traditional free-hand technique. The practical experience of the surgeon influences the duration of the intervention and the radiation exposure for patients and him-/herself. Especially when the placement of heavy and long instruments in double oblique angles is required, manual techniques reach their technical limitations very fast. The system presented herein automatizes the needle positioning using only two 2D scans while the robotic platform guides the intervention. These two images were used to plan the needle pathway and to estimate the pose of the robot using a custom-made end-effector with embedded registration fiducials. The estimated pose was subsequently used to transfer the planed needle path to the robot’s coordinate system and finally to compute the movement parameters in order to align the robot with this plan. To evaluate the system, two phantoms with 11 different targets on it were developed. The targets were punctured, and the application accuracy was measured quantitatively. The solution achieved sub-millimetric accuracy for needle placement (min. 0.23, max. 1.04 in mm). Our approach combines the advantages of fluoroscopic imaging and ensures automatic needle alignment with highly reduced X-ray radiation. The proposed system shows promising potential to be a guidance platform that is easy to combine with available fluoroscopic imaging systems and provides valuable help to the physician in more difficult interventions.

scholarly journals Compensation for Interaction Torques During Single- and Multijoint Limb Movement

1999 ◽  
Vol 82 (5) ◽  
pp. 2310-2326 ◽  
Author(s):  
Paul L. Gribble ◽  
David J. Ostry
Keyword(s):  
Human Subjects ◽  
Emg Activity ◽  
Interaction Torque ◽  
Control Signals ◽  
Shoulder Muscles ◽  
Multijoint Movements ◽  
Movement Parameters ◽  
Shoulder Kinematics ◽  
Interaction Torques ◽  
Elbow Motion

During multijoint limb movements such as reaching, rotational forces arise at one joint due to the motions of limb segments about other joints. We report the results of three experiments in which we assessed the extent to which control signals to muscles are adjusted to counteract these “interaction torques.” Human subjects performed single- and multijoint pointing movements involving shoulder and elbow motion, and movement parameters related to the magnitude and direction of interaction torques were manipulated systematically. We examined electromyographic (EMG) activity of shoulder and elbow muscles and, specifically, the relationship between EMG activity and joint interaction torque. A first set of experiments examined single-joint movements. During both single-joint elbow ( experiment 1) and shoulder ( experiment 2) movements, phasic EMG activity was observed in muscles spanning the stationary joint (shoulder muscles in experiment 1 and elbow muscles in experiment 2). This muscle activity preceded movement and varied in amplitude with the magnitude of upcoming interaction torque (the load resulting from motion of the nonstationary limb segment). In a third experiment, subjects performed multijoint movements involving simultaneous motion at the shoulder and elbow. Movement amplitude and velocity at one joint were held constant, while the direction of movement about the other joint was varied. When the direction of elbow motion was varied (flexion vs. extension) and shoulder kinematics were held constant, EMG activity in shoulder muscles varied depending on the direction of elbow motion (and hence the sign of the interaction torque arising at the shoulder). Similarly, EMG activity in elbow muscles varied depending on the direction of shoulder motion for movements in which elbow kinematics were held constant. The results from all three experiments support the idea that central control signals to muscles are adjusted, in a predictive manner, to compensate for interaction torques—loads arising at one joint that depend on motion about other joints.

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