منابع مشابه
Evoked EMG Makes Measurement of Muscle Tone Possible by Analysis of the H/M Ratio
When a peripheral nerve is subjected to percutaneous electrical stimulation, action potentials are induced in the innervated skeletal muscle. The induced action potential is recorded by evoked EMG, which includes the H-wave, the M-wave, and the F-wave (Fig. 1). The H-wave is a good indicator of the strength and distribution of the stimulus input from muscle spindle to the motor neuron pool, whi...
متن کاملSmooth Muscle Tone
The objective of this study was to elucidate the mechanisms associated with the reciprocal relation between magnesium and calcium on vascular smooth muscle tone in bovine pulmonary artery and vein. Rapid removal of magnesium from Krebs-bicarbonate medium used to bathe isolated rings of precontracted artery or vein caused transient endotheliumand calciumdependent relaxation and cyclic GMP accumu...
متن کاملValidation of Portable Muscle Tone Measurement Device Based on a Motor-driven System
As a component of upper motor neuron syndrome, assessment of abnormality in muscle tone, including spasticity and rigidity, is a routine clinical examination. The aim of this study is to extend a sophisticated motor-driven measurement system, developed in our previous research, as a validation platform for developing a portable muscle tone measurement system. The main features of hand-held musc...
متن کاملValidation of portable muscle tone measurement device for quantifying velocity-dependent properties in elbow spasticity.
The objective of this study is to develop a portable device for quantifying the velocity-dependent properties of spastic elbow muscles. Based on a motor-driven system, validation tests of the portable system such as accuracy and response of sensors were first examined. Furthermore, simulated modules (inertia, damper and spring) as well as elbow joints (15 control and 15 hemiplegic subjects) wer...
متن کاملReflex regulation of airway smooth muscle tone.
Autonomic nerves in most mammalian species mediate both contractions and relaxations of airway smooth muscle. Cholinergic-parasympathetic nerves mediate contractions, whereas adrenergic-sympathetic and/or noncholinergic parasympathetic nerves mediate relaxations. Sympathetic-adrenergic innervation of human airway smooth muscle is sparse or nonexistent based on histological analyses and plays li...
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ژورنال
عنوان ژورنال: Spinal Cord
سال: 1992
ISSN: 1362-4393,1476-5624
DOI: 10.1038/sc.1992.106