Science Quiz / Muscle Relaxants/Spasmolytics

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Can you name the Muscle Relaxants/Spasmolytics?

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Congener of Clonidine (alpha 2 agonist). Spasmolytic effect due to reinforcement of both presynaptic and postsynaptic inhibition of the motor neuron in the cord. Toxicity: drowsine
Name technique used clinically to measure the affects of skeletal muscle relaxants
______: a GABA-b agonist produces a hyperpolarizing signal on the IA afferent fibers.
Nondepolarizing drugs have less affect on autonomic ganglia and _______ receptors as compared to succinylcholine
_______: a GABA-a modulator produces hyperpolarization on both efferent and afferent neurons.
Duration correlates with _______ mechanism.
Binds to the “ryanodine” calcium channel in the sarcoplasmic reticulum. Inhibits the release of (activator) calcium from the sarcoplasmic reticulum - prevents contraction . Adv
Fastest onset (1-2min) among Non-depolarizing relaxants. Reversed with cholinesterase inhibitors.
Phase I block: ______: flaccid paralysis
Name a toxicity of Baclofen.
Prevents release of acetylcholine from vesicles. Used for generalized spastic disorders due to neurologic injury. Single injection works for weeks to months.
low dose nondepolarizing NM blockers antagonize succinyl-choline-induced fasciculation's and post-operative _____
Phase 2 block occurs after long term exposure to succinylcholine. In phase 2 the block resembles non-depolarizing blockade. Succinylcholine may be blocking the ____ of the channel
CNS acting spasmolytic that may be useful in spasm of patients multiple sclerosis
Increase in tonic stretch reflexes and flexor muscle spasms together with muscle weakness (Painful spasms). Abnormal bowel, bladder and skeletal muscle function.
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Related to TCAs. Interferes with polysynaptic reflexes in the brain stem that maintain skeletal muscle tone . Toxicity: sedation, antimuscarinic effects (dry mouth), fatigue, nause
Baclofen increases Potassium conductance resulting into ______.
In phase 1 block succinylcholine locks the channel in the ____ state producing fasciculation fatigue.
Phase II block: _____: after continued exposure
There is a small number of patients (1 in 3500 people of ______ decent) who have a genetic mutation in a butyrylcholinesterase--a plasma cholinesterase. There is limited breakdown
_______: inhibits skeletal muscle contraction directly by preventing release of calcium from the sarcoplasm.
Name one of the two two general chemical classification of nondepolarizing skeletal muscle relaxants
Fastest onset and shortest duration of action (5-10min) depolarizing drug. It is optimal for short procedures such as intubation that sometimes requires pharmacologic airway relaxa
Name a side effect of depolarizing blockade.
______ Relaxants: agonist of nicotinic receptor which are relatively resistant to degradation producing excessive channel opening and subsequent muscle fatigue
Non-depolarizing drugs are _____ antagonist. Therefore, increased agonist, ACh, concentration can compete for the binding to the nicotinic receptor. Drugs like cholinesterase inhib
Used to treat ALS-induced spasm by inhibition of glutaminergic transmission in CNS
NM block is enhanced by ______.
______ Relaxants: antagonist of acetylcholine (low doses), high doses blocks poor

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