what are faradic and sinusoidal currents
are low nerve muscle rent group with tolerance frequencies of 40 to 80 Hz
what type of current is faradic
asymmetric bipolar alternating current
surged current
gradual increase and decrease of peak intensity
asymmetric bipolar alternating current
- induced asymmetrical alternating current
- biphasic, asymmetrical unbalanced spiked
- positive portion-short duration high intensity and spike [second phase]
- negative portion= long duration, less intensity and curved [1st phase]
physiological effects on sensory neurons
slightly prickling sensation
mild erythema
physiological effects on motor neurons
contraction
metabolism increases
vasodilation
other effects of faradic
has n heating effect
no chemicals
increases circulation
denervated muscle insufficient transit time
what are sinusoidal currents
low frequency currents that alternate equally
f=50-100Hz
duration=10ms
different of sinusoidal from faradic
1.has more marked stimulation=improve circulation both locally and general
2.more painful, because the time of stimulation is longer
factors causing degeneration reaction
1.nerve or nerve root complete cut
2. any pressure on the nerve
3. excessive stretching of the nerves
4. toxic neuropathies
5. conditions arise from anterior horn destruction of medulla spinalis
nerve lesions causing paralysis
Neuropraxia
Axonotmesis
Neurotmesis
neuropraxia
temporary damage that does not break axonal integrity
mildest peripheral nerve damage
axonotmesis
a damage but not in C.T but causes disruption of the axons in the nerve cells
Wallerian degeneration on distal side
3 to 4 days after injury
Wallerian degeneration
active process of retrograde degeneration of distal end of axon that is a result of nerve lesion
between 7 to 21 days
neurotmesis
completely disrupts neural integrity by damaging both axons and connective tissue.
wlallerin degeneration ocuurs on proximal side
clinical uses of faradic
- treatments of weak and atrophied muscles
- muscle reeducation
- train new muscle fnx
- treat paralyzed muscle
- increase circulation
- solving + preventing adhesion
7.reducing pain - electrodiagnosis
- constipation
preferable application technique
motor point stimulation
application techniques
- motor point stimulation
- group stimulation
- in water application
4.faradism under pressure to relieve edema
contraindications of faradic
unreliable patients
loss of sensation
cancer
tb
acute inflammation
skin lesion
thrombosis
