Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
principles of stim
ortho foundations exam 1 material
| Question | Answer |
|---|---|
| fiber that is ____ is going to be easier to stimulate | larger and myelinated |
| shape of strength duration curve relates to the | INTENSITY and DURATION of stimulus needed to cause action potential |
| nerves will have ____thresholds for stimulation | different |
| easiest fiber to stimulate , fuzzy and comfy sensation | a - beta |
| *minimum intensity of current necessary to cause tissue excitation when the current is applied for a maximum duration | rheobase |
| duration required to excite the nerve at a current twice the intensity of rheobase | chronaxie |
| uses for electrical stimulation | muscle contraction, pain relief, tissue healing, drive ions into tissue |
| waveforms | symmetrical biphasic, Russian, interferential, high volt |
| AP reaches the NM junction, NM are released to motor endplate. if enough NT released, depolarization occurs. This describes ____ contraction | twitch |
| twitch contractions summate to produce a maximum shortening contraction of the fiber. this describes _____ | tetanic contraction |
| *once you reach tetantic contraction, increasing _____ isn't going to be helpful in increasing muscle force | frequency |
| frequency for tetanic contraction | 50 Hz |
| pulse duration for titanic contraction | 500 microseconds |
| intensity for tetanic contraction | 40-60% of maximal voluntary contraction |
| ______ allows muscle fibers to recover | on off time |
| use _____ pads for muscle strengthening | large |
| a ___ second ramp time is usually used for muscle strengthening | 2 second |
| polarity for muscle strengthening | alternating current |
| electrode size for muscle strengthening | balance current density with comfort |
| placement for muscle strengthening | motor point |
| muscles that are not being supplied by a nerve require ___ | stimulus of HIGH intensity and LONG duration in order to get a contraction |
| russian protocl | burst frequency, polyphasic, medium frequency of 2000-1000 Hz |
| advantage of burst frequncy | higher carrier frequency is more comfortable, can turn it up higher, making it more likely to recruit more motor fibers to get a stronger contraction |
| level 1 pain control | ascending, high frequency, sensory level |
| level 2 pain control | descending, brief intense, noxious |
| level 3 pain control | opiate, low frequency, motor level |
| ascending pain control pulse duration | 125 microseconds |
| ascending pain control frequency | 125 pps |
| ascending pain control intensity | comfortable sensation with no muscle contraction |
| ascending pain control on/off ratio | continuous with some modulation |
| ascending pain control treatment time | as long as patient finds it beneficial |
| ascending pain control pad placement | directly over painful areas or in areas of referred pain (2 finger separation between pads) |
| descending pain control pulse duration | 10 msec(as long as possible) |
| descending pain control frequency | 80 pps |
| descending pain control intensity | as high as patient can tolerate- should be noxious but tolerable |
| descending pain control on/off ratio | 30 seconds-min |
| descending pain control treatment time | 15-30 min |
| descending pain control pad placement | small pads over painful areas, trigger points, or acupuncture points |
| opiate pain control pulse duration | 200 microseconds to 10 msec (as long as possible) |
| opiate pain control frequency | 1-5 pps |
| opiate pain control intensity | very high approaching noxious with muscular contraction |
| opiate pain control on / off ratio | 30-45 seconds with a brief off time of a few seconds |
| opiate pain control treatment time | 15-30 min |
| opiate pain control pad placement | over painful areas, trigger points, acupuncture points |
Created by:
thomask9
Popular Physical Therapy sets