Electric Stim - Muscle contract

Question 0

ac will cause blank of motor unit

Answer 0

depolarization

Question 1

muscle contraction steps

Answer 1

1. depolarization of alpha motor neuron
2. synapse with nmj
3. ach released into synaptic cleft
4. muscle contract

Question 2

dc will cause depolarization of blank

Answer 2

muscle cell directly

Question 3

if a nerve has been severed, this current should be used to stim muscle contraction

Answer 3

direct

Question 4

alpha motor neuron and beta sensory neurons are stimulated by blank

Answer 4

russian current

Question 5

russian current stimulates blank motor units

Answer 5

large

Question 6

to excite a tissue, stimulate must be long enough, strong enough and rise quickly enough… what law?

Answer 6

arndt shultz

Question 7

high frequency will cause blank

Answer 7

tetanic contraction

Question 8

to increase strength in healthy subjects, the mvc must be at least blank percent of MVC

Answer 8

50%

Question 9

increase strength in injured muscle requires blank percent of mvc

Answer 9

10%

Question 10

if someone is mmt grade 2 but the current creates a grade 3 then blank occurs

Answer 10

strengthening

Question 11

pulse duration is blank for larger muscles

Answer 11

longer

Question 12

carrier frequncy of russian current

Answer 12

2500 pps

Question 13

one electrode over target with other electrode placed some distance away over nonexcitable tissue

Answer 13

monopolar

Question 14

10:10:50

Answer 14

contractions:on:off

Question 15

both channels activated at same time

Answer 15

synchronous

Question 16

both channels are activated alternately

Answer 16

reciprocal

Question 17

there is more fatigue with blank than blank

Answer 17

e stim, voluntary contraction

Question 18

four things that influence force frequency relation

Answer 18

muscle length, temp, fatigue state, degree of potentiation of muscle

Question 19

low frequencies(1-2pps) cause blank

Answer 19

twitches

Question 20

higher frequencies (15pps) cause blank

Answer 20

summation

Question 21

frequencies > 30 pps causes blank

Answer 21

fused tetanus

Question 22

temporal motor unit recruitment in e stim is blank

Answer 22

synchronous

Question 23

temporal motor unit recruitment in voluntary is blank

Answer 23

asynchronous

Question 24

both electrodes placed over target tissue

Answer 24

bipolar

Question 25

four electrodes over target tissue

Answer 25

quadripolar