Electrotherapy Flashcards
1
Q
What gives up electrons easily?
A
Conductors
2
Q
Where are charges not free to move around?
A
Insulators
3
Q
Flow of electrons known as?
SI unit?
A
Current.
Amp.
4
Q
What is Ohm’s law?
A
Relationship b/w current, voltage, and resistance.
I= V/R
5
Q
Force or pressure of electricity?
A
Voltage
6
Q
Resistance to AC flow?
A
Impedance.
7
Q
3 waveforms of Electric current?
A
DC
AC
Pulsative
8
Q
Continuous flow in 1 direction?
A
DC
9
Q
Continous bidirectional flow??
A
AC
10
Q
Muscle contraction frequency
A
1-10 pps
11
Q
Tetanic frequency?
A
20-50 pps
12
Q
Decrease in nerve AP frequency over time?
A
Accomodation
13
Q
Minimum amplitude to cause depolarization?
A
Rheobase
14
Q
Time required to depolarize when peak current is 2x rheobase?
A
Chronaxie
15
Q
Optimal excitation of nerve occurs between
A
Rheobase and chronaxie
