Quiz 1 Flashcards
What is the goal of most therapeutic electrical stimulation?
to produce action potentials in intact sensory or motor neurons
How can you deliver current?
externally
internally
percutaneously
What is resting potential?
difference between outside and inside of the nerve cell
What does a negative electrode do?
it is a better depolarizer of axons in the body: draws positive charge away from membrane
Where are action potentials in motor neurons created?
proximally in spinal cord and travel distally to muscles they innervate
What is amplitude?
strength
What is duration?
time
What is DC current used for?
iontophoresis
stimulating denervated muscle
What direction does DC current flow?
in one direction and continously
What is AC current used for?
- pain control (interferential): beat modulated
- muscle contraction (Russian): burst modulated AC
What are the 3 frequencies of AC?
low (10,000 Hz)
What frequency of AC is used?
medium; transformed into interferential or Russian
What is pulsed current used for?
pain control
muscles contraction
tissue healing
What is monophasic?
only above the line, current is delivered only in one direction; one electrode is always negative and one is positive and it does not change
What is monophasic used for?
promote tissue healing
manage acute edema
What is biphasic?
currents that switch direction in the middle of the pulse (2 directions)