PTA 208 Exam Highlights

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Author:
amills1
ID:
261718
Filename:
PTA 208 Exam Highlights
Updated:
2014-02-12 20:56:34
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PTA 208 Exam Highlights Stim Traction
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Notes/answers to points Rebecca told us at end of class Wednesday
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  1. Ohm's Law formula
    • V=IR
    • voltage=(amps)(resistance)
  2. What is the relationship between current and resistance?
    • inverse
    • (V/R)=I
  3. % weight for lumbar traction
    • 50
    • 30-60 disc protrusion
  4. % weight for cervical traction
    7%
  5. outside vs inside resting potential polaritz
    • inside -
    • outside +
  6. range of normal resting polarity
    -40-(-90)
  7. T/F action potential is all or none
    true
  8. cathode is __ polarity
    -
  9. anode is ___ polarity
    +
  10. depolarization
    • this occurs during action potential
    • the sodium channels open and sodium rushes in
    • muscle contraction
  11. DC current
    all one phase, positive only or negative only
  12. AC
    alternates between positive and negative
  13. what current is used for iontophoresis and denervated muscle
    direct
  14. when electrodes are closer together current is more ____
    superficial
  15. smaller pads are more ____ to a location
    specific
  16. head position to target atlantoaxial
    neutral
  17. head position to target below C2
    20-30 degree flexion
  18. ES contras
    • pacemaker
    • unstable arrthymia
    • over metal
    • over carotids
    • over thrombosis
    • pregnancy
  19. ES precautions
    • cardiac disease
    • impaired sensation or mentation
    • malignancy
    • skin irritation/open wound
  20. E-stim targets which fibers 1st?
    • fast twitch type II (anaerobic/PTC)
    • fatigue quickly
  21. normal voluntary contraction activates these fibers first
    • slow twitch type I (aerobic)
    • more fatigue and atrophy resistant
  22. this is the neurotransmitter released at NMJ for motor
    ACL acetylcholine
  23. AP forces sacs to release this which forms cross bridge allowing muscle to contract
    calcium
  24. voltage definition
    • strength of current
    • measured in volts
    • V=IR
  25. current definition
    • flow rate of charged particles 
    • measured in amps
    • V=IR
  26. resistance definition
    • opposition of a material to electrical current
    • Ohms
    • V=IR
  27. nerve with largest diameter, fastest conduction, and thickest myelination
    alpha motor neuron
  28. most superficial nerve
    Abeta, sensory
  29. T/F due to its thicker diameter and more myelination the A-Alpha nerve is first to react to e-stim
    • False
    • It may be quicker due to myelination than A-Beta but A-Beta is more superficial making it react first.
  30. Traction contras
    • where motion is contraindicated
    • acute injury/inflam
    • joint hypermob or instability
    • peripheralization
    • uncontrolled HTN
  31. traction precautions
    • structural disease/condition affecting spine
    • if belt pressure can be hazardous (pregnancy)
    • displaced annular fragment
    • medial disc protrusion
    • when severe pain fully resolves with traction
    • claustrophobia
    • disorientation
    • inability to tolerate supine or prone

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