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tubocurarine/cansancio

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ArtículosEnsayos clínicosPatentes
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Fourier series analysis of the electrophysiological pattern of fatigue in healthy human beings, after curare administration.

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Real time computer analysis of the electrophysiological development of muscular fatigue after small doses of d-tubocurarine (TC), has been examined in anesthetized human beings. As compared to a decrease of frequency in the control measurements, previous studies have shown an increase of the
We investigated whether impaired sarcolemmal excitability causes severe fatigue during repeated tetani in isolated mouse skeletal muscle. Slow-twitch soleus or fast-twitch extensor digitorum longus (EDL) muscles underwent intensive stimulation (standard protocol: 125 Hz for 500 ms, every second,

Effects of rate of stimulation and of fatigue on the response to neuromuscular blocking agents.

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The response to neuromuscular blocking agents, as exemplified by suxamethonium and tubocurarine, may differ between symmetrical muscles. Increased rates of stimulation and fatigue both increase sensitivity to blocking agents. During recovery from suxamethonium block muscles may show a transitory

Fatigue of isolated rat diaphragm: role of impaired neuromuscular transmission.

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We compared the contributions of impaired neuromuscular transmission (transmission fatigue) and impaired muscle contractility (contractile fatigue) to fatigue of the isolated rat diaphragm. To make this comparison, we measured the differences in active tension elicited by direct muscle stimulation
We examined whether electrical field stimulation with varying characteristics could excite isolated mammalian skeletal muscle through different sites. Supramaximal (20-V, 0.1-ms) pulse stimulation with transverse wire or parallel plate electrodes evoked similar forces in nonfatigued slow-twitch

Activity-induced recovery of excitability in K(+)-depressed rat soleus muscle.

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Increased extracellular K(+) concentration ([K(+)](o)) can reduce excitability and force in skeletal muscle. Here we examine the effects of muscle activation on compound muscle action potentials (M waves), resting membrane potential, and contractility in isolated rat soleus muscles. In muscles

Characteristics and mechanism of neuromuscular block in myasthenia gravis.

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The neuromuscular block of myasthenia gravis has the characteristics of an antidepolarizing (competitive block), similar to that produced by d-tubocurarine in normal subjects: progressive decrease in muscle action potentials evoked by two or more nerve stimuli, posttetanic facilitation, posttetanic

Frequency sweep analysis of neuromuscular junction continuity.

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A new technique for measuring neuromuscular junction continuity is described. Junctional transmission is evaluated by integration of the electromyographic (EMG) response induced by intramuscular electrical stimulation. The unique characteristics of this monitoring technique are the use of

Some contractile and electrophysiologic properties of the periurethral striated muscle of the cat.

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Evidence for differences between the periurethral striated muscle and external anal sphincter of the cat is provided by measurement of the contractile properties in situ and in vitro and the electrophysiologic properties in vitro. In the periurethral striated muscle, the contractile pressure

Continence and some properties of the urethral striated muscle of male greyhounds.

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OBJECTIVE To determine the properties of the striated muscle of the greyhound (dog) urethra and to consider its role in maintaining continence. Materials and methods The thickness of the muscle layers and the muscle types were determined by examining sections stained with haematoxylin and eosin or

Heart rate at the onset of static exercise in man with partial neuromuscular blockade.

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In human subjects the length of the first complete cardiac cycle after the onset of static finger or hand muscle contractions was recorded. Graded contractions as well as maximal contractions in which muscle fatigue was provoked by ischaemia were studied. Maximal finger muscle contractions were also
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