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