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426 results on '"Solomonow M"'

18. A novel method to attain sinusoidal mechanical responses from single motor units

Author

Gobbo, Massimiliano, Celichowski, J., Krutki, P, Drzymała Celichowska H, ., Solomonow, M., and Orizio, Claudio

Subjects
Male, Motor Neurons, Physical Stimulation, Animals, In Vitro Techniques, Rats, Wistar, Spinal Nerve Roots, Evoked Potentials, Biophysical Phenomena, Electric Stimulation, Rats
Abstract

The relationship between output force and motor command depends on the intrinsic dynamic responses of motor units (MUs), which can be characterized by evoking accurate sinusoidal force responses at different frequencies. In this study we sought to determine whether sinusoidal modulation of the stimulation rate of single MUs results in reliable sinusoidal force changes.Single axons of rat ventral roots were stimulated electrically by changing the pulse rate sinusoidally at different frequency modulation (0.4-1.0-2.0-4.0 Hz for slow, 1.0-2.0-4.0-7.0 Hz for fast MUs). The twitching sinusoidal force signal was interpolated. We calculated harmonic distortion (HD) and the correlation coefficient (r) between theoretical sines and interpolated signals.HD was always5%, and r was always0.97.The HD and r-values obtained indicate highly reliable sinusoidal responses, which supports the potential use of this method to further characterize the dynamic behavior of single MUs.

Published
2014

23. Current status of walking orthoses for thoracic paraplegics

Author

D'Ambrosia, R., Solomonow, M., and Baratta, R. V.

Subjects
Paraplegia, Orthotic Devices, Evaluation Studies as Topic, Heart Rate, Humans, Equipment Design, Energy Metabolism, Electric Stimulation, Research Article
Published
1995

26. System integration of pattern recognition, adaptive aided, upper limb prostheses

Author

Lyman, J, Freedy, A, and Solomonow, M

Subjects
Man/System Technology And Life Support
Abstract

The requirements for successful integration of a computer aided control system for multi degree of freedom artificial arms are discussed. Specifications are established for a system which shares control between a human amputee and an automatic control subsystem. The approach integrates the following subsystems: (1) myoelectric pattern recognition, (2) adaptive computer aiding; (3) local reflex control; (4) prosthetic sensory feedback; and (5) externally energized arm with the functions of prehension, wrist rotation, elbow extension and flexion and humeral rotation.

Published
1975

27. Frequency modulated cutaneous orientation feedback from artificial arms

Author

Solomonow, M, Freedy, A, and Lyman, J

Subjects
Environment Pollution
Abstract

A model of the human arm, emphasizing the neuromuscular mechanisms of feedback control, has been constructed. The various parameters and functions of physiological receptors in the feedback section have been classified into an automated category that can be incorporated in the prosthesis servo loop, and into a sensory category that should be communicated to the operator if control and dynamic performance are to be optimized. A scheme for simultaneous display of two such sensory parameters, i.e., fingertip pressure and elbow position, has been developed, implemented and evaluated. The neurophysiological mechanism of such displays, and the feasibility of sensory transformation, is discussed in this paper.

Published
1975

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