Faradic And Sinusoidal Flashcards
Faradic currents varry btw
1-1000 hz per second
Most comfortable tolerance for frequency in faradic is
40-80
Physiological effects on the sensory neuron
Slight prickling sensation
Feeling is not painful
Mild erythema
Physiological effect on motor neurons
Causes contractions
Increased metabolism
Vasodilation
Tetanic current
Effects of faradic
Heat
Chemical
Circulation
Denervated muscle
Sinusoidal current
Low frequency currents that alternate equally
Frequency is 50-100hz
Current duration is 10ms
More painful
More marked stimulation of sensory nerve endings in the skin
Faradic effects on the sensory nerves and motor nerves
Sensory nerves
. Sense of needling
Erythema and reflex vasodilation occurs
Motor nerves
. They create tetanic contractions
They contract the muscle innervated
Factors causing degeneration reaction
Nerve or nerve root completely cuts
Pressure on the nerve
Conditions caused by excessive stretching of the nerves
Toxic neuropathies
Conditions from anterior horn destruction of the medulla spinallis
What are the Nerve lesions causing paralysis
Neuropraksia
Axonotmesis
Neurotmesis
Neuropraxia or grade 1
Temporary damage that doesn’t break the anoxal integrity
It’s the mildest peripheral nerve damage
Sensory motor problems occur in the proximal part of the damaged area
Axontomesis grade 2
Causes distruption of the axons in the nerve cell
Wallerian degeneration occurs distally to the injury
Wallerian degeneration
Is an active process of retrograde degeneration Of the distal end of an axon that is a result of a nerve lesion
It occurs between 7-21 days after the lesion occurs
In Wallerian degeneration after 21 days acute nerve degeneration will show where
On the electromyograph
What nerve lesion completely distrups the neural intergity
Neurotmesis
Clinical use of faradic current
Treatment of weak and atrophied muscles
Muscle reeducation
Train new muscle function
Treatment of paralyzed muscles
Increase blood circulation
Increase venous and lymphatic circulation
Solving and preventing adhesion
Reducing pain with opposite irritation effect
Application for Faradic
Prepare and test the patient Place the electrodes Surge the current Set intensity Control the patient
Application technique for faradic
- Motor point stimulation..,
Preferred method
Used in isolated muscles
Time 20-30 min
Technique for application
2.Group stimulation
Put on origio and insertion
- In water application
For faradism under pressure
Placement of electrode for lower limb goes where
Active electrodes are placed over the belly of the calf muscle
Passive electrodes are placed over the sole of the foot
Placement of electrodes for upper limb
Active electrodes are placed over the flexor aspect or forearm at the proximal and distal of the muscle belly
The passive electrode is placed over the palm or cubital fossa
A surge duration and a surge interval respectively
3 sec
9 sec
Treatment time is 15-30 min
When is group stimulation used
If several muscles originate from the same place
One end of the plate electrodes is placed on the nerve and other is placed on the body of the muscle
