The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Jurriaan H De Groot - One of the best experts on this subject based on the ideXlab platform.
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The variability of shoulder motions recorded by means of Palpation.
Clinical Biomechanics, 1997Co-Authors: Jurriaan H De GrootAbstract:Objective. The objective of this methodological study is the quantification of the sources of variability in the recorded three-dimensional motions of the shoulder mechanism for comparative purposes. Background. The Palpation and subsequent digitization of skeletal landmarks of the shoulder mechanism is a non-invasive and relatively easy method to quantify shoulder orientations. Comparison of individual motions is subject to the accuracy of the Palpation method, the magnitude of kinematic redundancy of the shoulder mechanism and inter-subject differences in morphology and physiology. Quantification of these sources of variance i.e. the Palpation error, motoric noise and inter-subject differences, demonstrated the accuracy of the method and the potential validity of the descriptive motion parameters, e.g. Cardan angles, in intra- and inter-individual studies for clinical, ergonomical and biomechanical studies. Methods. The orientations of the shoulder bones were recorded five times for each of five subjects by Palpation and digitization of 12 skeletal landmarks for 10 equidistant arm elevation postures in the scapular plane. The orientations were described by means of Cardan angles. The Palpation error was determined at a standardized initial rest position and expressed by Cardan angles for each recorded posture. Adding motoric noise and inter-subject differences gave the inter-individual variance. Results. The Palpation error was approximately 2 °. The major recorded variance originated from motoric noise (±33%) and inter-subject difference (±55%). Conclusions. The Palpation method is an accurate means of recording the three-dimensional orientations of the shoulder mechanism and for intra-individual studies. However, inter-subject variability is large.
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The variability of shoulder motions recorded by means of Palpation.
Clinical biomechanics (Bristol Avon), 1997Co-Authors: Jurriaan H De GrootAbstract:OBJECTIVE: The objective of this methodological study is the quantification of the sources of variability in the recorded three-dimensional motions of the shoulder mechanism for comparative purposes. BACKGROUND: The Palpation and subsequent digitization of skeletal landmarks of the shoulder mechanism is a non-invasive and relatively easy method to quantify shoulder orientations. Comparison of individual motions is subject to the accuracy of the Palpation method, the magnitude of kinematic redundancy of the shoulder mechanism and inter-subject differences in morphology and physiology. Quantification of these sources of variance, i.e. the Palpation error, motoric noise and inter-subject differences, demonstrated the accuracy of the method and the potential validity of the descriptive motion parameters, e.g. Cardan angles, in intra- and inter-individual studies for clinical, ergonomical and biomechanical studies. METHODS: The orientations of the shoulder bones were recorded five times for each of five subjects by Palpation and digitization of 12 skeletal landmarks for 10 equidistant arm elevation postures in the scapular plane. The orientations were described by means of Cardan angles. The Palpation error was determined at a standardized initial rest position and expressed by Cardan angles for each recorded posture. Adding motoric noise and inter-subject differences gave the inter-individual variance. RESULTS: The Palpation error was approximately 2 degrees. The major recorded variance originated from motoric noise (+/-33%) and inter-subject difference (+/-55%). CONCLUSIONS: The Palpation method is an accurate means of recording the three-dimensional orientations of the shoulder mechanism and for intra-individual studies. However, inter-subject variability is large.
Lyn R Griffiths - One of the best experts on this subject based on the ideXlab platform.
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reproducibility and clinical utility of tendon Palpation to detect patellar tendinopathy in young basketball players
British Journal of Sports Medicine, 2001Co-Authors: Jill Cook, Karim M Khan, Z S Kiss, Craig Purdam, Lyn R GriffithsAbstract:Background—Palpation is an important clinical test for jumper’s knee. Objectives—To (a) test the reproducibility of Palpation tenderness, (b) evaluate the sensitivity and specificity of Palpation in subjects with clinical symptoms of jumper’s knee, and (c) determine whether tenderness to Palpation may serve as a useful screening test for patellar tendinopathy. The yardstick for diagnosis of patellar tendinopathy was ultrasonographic abnormality. Methods—In 326 junior symptomatic and asymptomatic athletes’ tendons, Palpation was performed by a single examiner before ultrasonographic examination by a certified ultrasound radiologist. In 58 tendons, Palpation was performed twice to test reliability. Tenderness to Palpation was scored on a scale from 0 to 3 where 0 represented no pain, and 1, 2, and 3 represented mild, moderate, and severe tenderness respectively. Results—Patellar tendon Palpation was a reliable examination for a single examiner (Pearson r = 0.82). In symptomatic tendons, the positive predictive value of Palpation was 68%. As a screening examination in asymptomatic subjects, the positive predictive value of tendon Palpation was 36‐38%. Moderate and severe Palpation tenderness were better predictors of ultrasonographic tendon pathology than absent or mild tenderness (p<0.001). Tender and symptomatic tendons were more likely to have ultrasound abnormality than tenderness alone (p<0.01). Conclusions—In this age group, Palpation is a reliable test but it is not cost eVective in detecting patellar tendinopathy in a preparticipation examination. In symptomatic tendons, Palpation is a moderately sensitive but not specific test.Mild tenderness in the patellar tendons in asymptomatic jumping athletes should be considered normal. (Br J Sports Med 2001;35:65‐69)
Hanne Borg Finckenhagen - One of the best experts on this subject based on the ideXlab platform.
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Vaginal Palpation of pelvic floor muscle strength: inter-test reproducibility and comparison between Palpation and vaginal squeeze pressure
Acta obstetricia et gynecologica Scandinavica, 2001Co-Authors: Hanne Borg FinckenhagenAbstract:Background Vaginal Palpation is commonly used in clinical practice to teach and evaluate pelvic floor muscle strength, and several grading systems have been developed. The aim of the present study was to test inter-rater reproducibility of the modified Oxford grading system and compare results from vaginal Palpation with squeeze pressure measurement. Methods Twenty female physical therapy students, mean age 25.1 years (range 21-38) participated in the study. Two experienced physical therapists conducted the Palpation test in random order. Muscle strength was classified according to a 6-point scale (modified Oxford grading system). Results from the Palpation test were compared with measurement of vaginal squeeze pressure using a vaginal balloon connected to a fiberoptic microtransducer (Camtech AS, Sandvika, Norway). To ensure validity of pressure measurement only contractions with simultaneous observation of inward movement of the perineum were registered. Results The inter-rater reliability for vaginal Palpation was 0.70 measured by Spearman's rho (p Conclusions Vaginal Palpation is mandatory when teaching correct pelvic floor muscle contraction. However, the present results indicate that the method is not reproducible, sensitive and valid to measure PFM strength for scientific purposes.
Marin Kobilarov - One of the best experts on this subject based on the ideXlab platform.
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concurrent nonparametric estimation of organ geometry and tissue stiffness using continuous adaptive Palpation
International Conference on Robotics and Automation, 2016Co-Authors: Preetham Chalasani, Long Wang, Rajarshi Roy, Nabil Simaan, Russell H Taylor, Marin KobilarovAbstract:Surgeons often manually palpate tissue or organs in order to find tumors or other anatomical structures. Information about organ geometry and tissue stiffness gained from Palpation can also be extremely useful in robotic surgery for diagnosis, surgical guidance, and registration to other preoperative information. However, it is not always easy to obtain, even if the robot is equipped with force sensors. This paper reports our approach for concurrent estimation of stiffness and surface geometry, using a continuous motion similar to a sweeping Palpation motion used by surgeons. Our method relies on force data captured by a tactile sensor rigidly attached to an end-effector probe. We use Gaussian processes to simultaneously estimate geometry and stiffness. The method is not tied to any specific robotic platform and is consistent with a variety of Palpation strategies. For simplicity, we discuss the results based on two different Palpation primitives. This is our first step towards developing an adaptive high fidelity model reconstruction and path optimization technique.
Peter A. Huijbregts - One of the best experts on this subject based on the ideXlab platform.
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Spinal Motion Palpation: A Review of Reliability Studies
Journal of Manual & Manipulative Therapy, 2002Co-Authors: Peter A. HuijbregtsAbstract:AbstractSpinal motion Palpation is a diagnostic tool used by a number of professions. Research studies available on the reliability of motion Palpation studies have statistical and methodological flaws affecting their statistical conclusion validity, external validity, and construct validity. Further research is necessary to determine the reliability of motion Palpation techniques bearing in mind these statistical and methodological flaws.
