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E-Stim and Muscle Contractions (Lecture 4)
Terms in this set (50)
over the motor point
Where is the cathode placed when using a monopolar set up?
monophasic and biphasic
Which types of waveforms can be used with NMES?
individual preference of patient
What would be the reason to choose a mono or biphasic setup when using NMES?
strengthening muscle contractions
Both NMES and Russian stim are used for what main purpose?
burst modulated alternating
What type of current is used in Russian stim?
bursts per second
The frequency in Russian stim is measured in what?
rate at which the current is cycling within a burst
Most russian stim units set their carrier frequency within what range of Hz?
When using e-stim for muscle contraction, rate is dependent on what?
as high as patient can tolerate to achieve good contraction
How high should amplitude be turned up when using e-stim for muscle contraction
What is the optimal phase duration when using e-stim for muscle contraction?
What is the optimal ramp time when using e-stim for muscle contraction?
When using e-stim for muscle contraction with spastic muscles, would would be a good ramp time?
What is the optimal on/off ratio to avoid fatigue when using e-stim for muscle contraction?
When using e-stim for muscle contraction with larger muscles, how many channels should be used?
What is the optimal treatment time (in contractions) when using e-stim for muscle contraction at the maximum tolerable intensity?
What is the most important factor to acheving strengthening through e-stim?
What is the biggest obstacle to achieveing the proper dosage when strengthening with e-stim?
By placing the electrodes further apart, you are causing the current to go __________.
Patient discomfort is usually the biggest issue when trying to generate a contraction more than what % of MVC?
According to Delitto and Synder-Mackler, what is the difference in training effect when using e-stim vs. exercise in healthy patients when training intensity is the same?
According to Delitto and Snyder-Mackler, is there an added benefit of using e-stim and exercise together in healthy patients?
Studies have shown better results with e-stim early in the rehab process in patient population due to the selective recruitment of what type of fibers?
In patient populations such as post-ACL repair and children with CP, what might happen to Type II muscle fibers?
With aging, Type II muscle fibers may show a decrease in what?
A muscle in which every motor unit as lost its motor axon is known as what?
state of the whole muscle and not the individual muscle fibers, when some fibers remain innervated.
anterior horn cell axon and all the muscle fibers it innervates.
true or false: a patient with a denervated muscle experiences a loss of voluntary and control AND reflexes?
What happens to the size of the muscle that is denervated?
What may happen to the neuromusclar junction of a denervated muscle?
fibrous and adipose tissue
What may muscle fibers of a denervated muscle be replaced with over time?
integrity of nerve matrix and muscle fiber
One primary influencing factor of reinnervation of denervated muscle. I.e. clean cut vs. crush injury
If the local environment of a denervated muscle is impacted by edema or venous statis, reinnervation will be more __________.
1mm per day/1 inch per month
What is the rate of regrowth of a nerve in a denervated muscle?
True or false: Russian stim can be used in patients with SCI, TBI and CVA?
True or false: sensory loss in a patient is no a contraindication for using e-stim, but is a precaution.
What result of e-stim may cause a decrease in edema and venous stasis?
Can using e-stim prevent changes from occuring in denervated muscle?
When using e-stim with a denervated muscle, what are you stimulating?
In order to stimulate a muscle fiber of a denervated muscle, it requires a larger what?
What should the pulse duration be when using e-stim with a denervated muscle?
DC, interrupted DC, AC low frequency
What 3 types of wave forms can be used when using e-stim with a denervated muscle?
When using AC with e-stim for a denervated muscle, frequency should be kept between how many cycles per second?
How many times per day should e-stim be used for a denervated muscle?
10-20, 1-2 seconds
How many isometric contractions should each e-stim treatment be for a denervated muscle? How long should the contractions last?
How much larger should off time be than on time when using e-stim with a denervated muscle?
is there a motor point in a denervated muscle?
E-stim treatment on denervated muscle was more successful if started when?
What size dnervated muscle generally responds better to e-stim? located where?
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