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56 Cards in this Set

  • Front
  • Back
Function of Low Frequency Currents
Strengthen/Rehab muscle, dec pain and dec spasm
2 types of low freq modalities
DC (Low Volt, HV) and AC(Sine, Faradic
Two or more elements
Compound
Smallest particle of an element that can take place in a chemical reaction
Atom
Electrons displaced or added to or from an atom
Ionization
Which ions help move edema?
Sodium
1 volt
1 ampere when applied to a conductor of 1 ohm
Capacity of an object is charged to 1 volt by 1 coulomb of electricity, unit of capacitance
Farad
Quantity of electricity transferred by a current of 1 ampere in 1 second
Coulomb
Pathway that electrons move, flow produced by a difference along a pathway
Circuit
Body tissues that are in series resistance
Skin and fat
Body tissues that are in parallel resistance
Muscle, blood, tendon, and bone
Ohm's Law
E=IR (Electromotive Force=(Intensity x Resistance)
Electrons always move in same direction between poles
DC
Continuous change in polarity beetween the two ends of a circuit
AC
cycles of AC are used for what?
To tetanize a muscle
When using electrotherapy, we use ______ to push the ______ through the body.
Voltage; current
Current can cause what injury?
Burns
T/F: Voltage can cause burns
False
Increased current = _____ depth
Increased
Amt of current needed to produce muscular contraction
Rheobase (intensity)
2 x Rheobase =
Chronaxie
Stimulation of a medium frequency current of constant amplitude inducing a maximum number of action potentials leading to anesthesia
Wedensky inhibition
aka sine wave
Muscle stim
Side benefits of EMS
1) dec spasticity, 2) lymph drainage, 3) phlebothrombosis removal, 4) dec atrophy
T/F: Electricity can break up adhesions.
False. Force of contraction does this.
Indications for EMS
1) Muscle hypertonicity
2) Atrophy
3) Pain
4) Edema
5) Passive exercise
Contraindications for EMS
1) Diminished sensation
Surge setting on EMS does what?
Tones muscles
Continuous muscle stim does what?
Edema reduction
T/F: Pain relief of EMS is exceptional.
False
Function of Tetanizing setting on EMS
Dec spasm
Function of automatic setting on EMS
1 minute each of surge, tetanizing and continuous
aka Pulsed EMS
Continuous EMS
Minimum of ___ pps to achieve contraction of one muscle fiber using EMS.
30
Minimum of ___ pps to achieve tetany using EMS.
50
A sensation of severe discomfort, suffering, or distress because of sensory receptor provocation that is difficult to ignore.
Pain
Two components of pain
Physical and mental
Speed of A alpha pain fibers
6-40 m/s
Type A alpha fibers convey what?
Pressure and touch
T/F: A alpha fibers are myelinated.
True
Unmyelinated postganglionic pain fibers
Type C
Speed of C fibers
0.5-2.0 m/s
Pain fibers that convey a vague sense of location, burning, sclerodermic pain
C fibers
Pain fibers that have muscle afferent and efferents
A alpha
Stimulating of which fibers act as a pain gate?
A fibers
Melzack and Wall revision to gate theory
Non-nociceptive and nociceptive neurons responsible for pain gate.
Chemicals associated with pain
Bradykinin and histamine
4 causes of pain
1) Chemical
2) Tissue ischemia
3) Muscle spasm
4) Postexertional
2 types of postexertional causes of pain
1) immediate- hours
2) delayed- 24-48 hrs later
Syndrome that begins with spasm leading to joint stiffness, weakness and eventual pain
Deconditioning syndrome
M/C/C of pain
Mechanical
Central objective of pain
Thrombosis, paralysis, loss of joint position sense
Peripheral objective of pain
intrinsic(sprain) or extrinsic (pinprick)
Subjective pain
Derived from mental processes
How can you tell the difference between mechanical and visceral pain?
You can reproduce mechanical pain