# quiz #1 – therapeutic electrical stimulation

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1. what is therapeutic electrical stimulation
passing current into tissue to promote healing, reduce pain, increase/maintain strength, reduce edema, decreased spasticity, improve motor control, past drugs
2. define anode
positive charged electrode, attracts anions
3. define cathode
negatively charged electrodes, attracts anions
4. defined voltage
potential difference of energy between electrodes, provided by battery or line voltage
5. name the four items in this picture
6. true or false – an example of direct current is a wall outlet
false – battery
7. true or false – an example of alternating current is a wall outlet
true
8. Coulomb number
6.24 X 10^18 of charged particlesAvogadro's number
9. Ampere
1 Coulomb of charge per second
10. Volt
energy needed to move 1 coulomb through 1 ohm of resistance (V=IR)
11. What is direct current?
• continues uninterrupted, in a unidirectional flow for atleast 1 sec
• use for iontophoresis or stimulation of denervated muscles
12. What is alternating current?
• the current flow changes direction
• 60 Hz/sec
13. what can we conclude from this picture
The longer the pulse width the higher the average voltage
14. what are the characteristics of this waveform
• rectangular
• symmetrical
• biphasic
• pulsed current
• AC current
15. what are the characteristics of this waveform
• unbalanced
• asymmetrical
• biphasic
• pulsed current
• AC Current
16. what is the name of this wave
• sinusoidal wave
• AC current
17. what is the name of this wave form
• high-voltage galvanic
• DC
• "one of the most comfortable wave forms"
18. what are the units of measurement for frequency
pulses per second – Hz
19. What does the patient feel when the pulse duration is increased?
It feels more intense to the patient even though it is the same voltage because there is more charge absorbed when there is a longer time period for the pulse
20. When frequency increases what occurs?
the same number of fibers are recruited, but a higher frequency makes them fire more rapidly
 Author: BPT ID: 66733 Card Set: quiz #1 – therapeutic electrical stimulation Updated: 2011-02-27 03:13:00 Tags: modalities Folders: Description: therapeutic electrical stimulation Show Answers: