Joint center longitudinal positions computed from a selected subset of Chandler's data

Leva, Paolo de

doi:10.1016/0021-9290(96)00021-8

Cited by 112 publications

References 5 publications

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“…Nineteen markers were attached to the landmarks 2,3) : 1) midpoint between right and left iliac crests, 2) right and 3) left acromia, 4) right and 5) left heads of radius, 6) right and 7) left styloid processes of radius, 8) right and 9) left 3rd knuckles, 10) right and 11) left greater trochanters of femur, 12) right and 13) left condyles of tibia, 14) right and 15) left lateral malleoli, 16) right and 17) left 2nd toes, 18) right top corner of luggage and 19) bottom center of luggage.…”

Section: Methodsmentioning

confidence: 99%

“…The human model was assumed to have 15 rigid segments: 1) head/trunk including head, neck, thorax and abdomen, 2) pelvis, 3) right and 4) left upper arms, 5) right and 6) left forearms, 7) right and 8) left hands, 9) right and 10) left thighs, 11) right and 12) left shanks, 13) right and 14) left feet and 15) luggage. Thus, it had 14 joints whose centers were estimated from marker positions 2,[6][7][8] A global reference system, X, Y, and Z, and a local reference systems, x, y, and z, for each segment were employed by a Cartesian coordinate system. The positive directions of the X, Y, and Z axes were anterior, cranial and right lateral, respectively.…”

Section: Inverse Dynamic Biomechanical Modelmentioning

confidence: 99%

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Biomechanical and Physiological Analyses of a Luggage-Pulling Task

et al. 2007

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Section: Methodsmentioning

confidence: 99%

Section: Inverse Dynamic Biomechanical Modelmentioning

confidence: 99%

Biomechanical and Physiological Analyses of a Luggage-Pulling Task

et al. 2007

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“…∆y, can then be calculated as ∆y = r ( 1 -sin(τ)) where τ = 270 o -α -β. α and β are the rotations in the SC-joint and AC-joint, respectively (Moeslund, 2003). r is approximately equal to 10.4% of the length of the upper arm (Leva, 1996). That is,…”

Section: Relating φ and ∆Vmentioning

confidence: 99%

Pose Estimating the Human Arm Using Kinematics and the Sequential Monte Carlo Framework

Moeslund¹

2005

Cutting Edge Robotics

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“…The gravitational force of his (her) arm and the jig were compensated by a balance weight. The weight of the subject's arm and hand was calculated from his (her) weight, and the length of his (her) arms and hands (8) (9) . The subject could flex and extend his (her) elbow joint in the vertical plane.…”

Section: Measurementmentioning

confidence: 99%

Modeling the Step-like Response in the Upper Limbs of Hemiplegic Subjects for Evaluation of Spasticity

Uchiyama

Uchida²

2005

IEEJ Trans.EIS

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The purpose of this study is to develop a new modeling technique for quantitative evaluation of spasticity in the upper limbs of hemiplegic patients. Each subject lay on a bed, and his forearm was supported with a jig to measure the elbow joint angle. The subject was instructed to relax and not to resist the step-like load which was applied to extend the elbow joint. The elbow joint angle and electromyogram (EMG) of the biceps muscle, triceps muscle and brachioradialis muscle were measured. First, the step-like response was approximated with a proposed mathematical model based on musculoskeletal and physiological characteristics by the least square method. The proposed model involved an elastic component depending on both muscle activities and elbow joint angle. The responses were approximated well with the proposed model. Next, the torque generated by the elastic component was estimated. The normalized elastic torque was approximated with a dumped sinusoid by the least square method. The reciprocal of the time constant and the natural frequency of the normalized elastic torque were calculated and they varied depending on the grades of the modified Ashworth scale of the subjects. It was suggested that the proposed modeling technique would provide a good quantitative index of spasticity as shown in the relationship between the reciprocal of the time constant and the natural frequency.

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Joint center longitudinal positions computed from a selected subset of Chandler's data

Cited by 112 publications

References 5 publications

Biomechanical and Physiological Analyses of a Luggage-Pulling Task

Biomechanical and Physiological Analyses of a Luggage-Pulling Task

Pose Estimating the Human Arm Using Kinematics and the Sequential Monte Carlo Framework

Modeling the Step-like Response in the Upper Limbs of Hemiplegic Subjects for Evaluation of Spasticity

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