Modalities Exam #3 quiz questions Flashcards Preview

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Flashcards in Modalities Exam #3 quiz questions Deck (26)
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1

the continuous, uridirectional flow of electrons

direct current

2

continuous flow of electrons rhythmically changing direction

indirect/alternating

3

flow of electricity (measured in _____) is driven by _____

coulombs
voltage

4

how is a nerve's excitability influenced by its size and depth

the larger and more superficial the nerve, the more easily it is stimulated

5

two ways to increase the strength of a current

pulse amplitude and duration

6

what is determined by motor unit recruitment?

tension

7

does the reference electrode have a charge

yes

8

what does a high-signal gain mean for biofeedback

biofeedback unit has a low sensitivity for muscle activity

9

biofeedback electrode placement

parallel to muscle fibers

10

average biofeedback period

5-10 min.

11

what factors must be addressed when using biofeedback to relax muscle guarding

pain
mental imagery
apprehension

12

what is the principle that allows the biofeedback unit to eliminate common noise between active electrodes

filtering

13

does biofeedback measure muscle contractions directly?

no

14

how is raw EMG converted to a visual or audio format

rectified
smoothed
integrated

15

what do biofeedback instruments measure?

peripheral skin temperature
finger phototransmission
skin conductance activity
electromyographic activity

16

goal of using biofeedback

muscle contraction

17

LASER acronym

light amplification by stimulated emission of radiation

18

steps in the generation of a laser beam

external energy is applied to a lasing medium to excite atoms to a higher-energy orbit
electrons of excited atoms return to their normal state and absorbed energy is released as particles of light
some particles of light begin to reflect back and forth through the lasing medium between two mirrors at the end of the amplifying chamber
an intense resonance of light particles develops in the amplifying chamber and some particles are released as a laser beam

19

clinically-relevant difference between lasers and light-emitting diodes (LEDs)

lasers require less time to deliver the same amount of energy to target tissue

20

are lasers and light therapy equally effective

no

21

light therapy is a form of

electromagnetic energy

22

high-energy lasers produce a greater amount of _____ than low level lasers

heat

23

purpose of traction in the treatment of a herniated disc

widening disk spaces
decreasing intervertebral disk pressure

24

how does traction contribute to pain relief

stretches muscles and ligaments and breaks the pain-spasm-pain cycle

25

how should patients be positioned during cervical traction

supine or seated

26

magnitude of force needed to separate vertebrae depends primarily on what two factors

frictional resistance to traction
resistance to stretch by the muscles and soft tissues