EMG

Question 1

therapeutic use of instrumentation to detect and feedback electric signals from motor unit action potentials (MUAP) that are generated by active muscle

Answer 1

emg biofeedback

Question 2

MUAP signals are converted into blank signals to reinforce voluntary muscle control

Answer 2

audiovisual

Question 3

emg feedback does not measure direct blank events

Answer 3

physiologic

Question 4

the biofeedback unit records some aspect that is highly blank with an actual physiologic event

Answer 4

correlated

Question 5

blank activity is an example of biofeedback unit measurement

Answer 5

electromyographic

Question 6

muscle contraction results from the blank of muscle fiber due to the binding of neurotransmitter from the blank neuron to receptor sites at the neuromuscular juntion

Answer 6

depolarization, alpha motor

Question 7

depolarization results in increased blank of muscle membrane to potassium and sodium

Answer 7

permeability

Question 8

the changes in the electrochemical gradient created by the MUAP can be detected by a blank

Answer 8

electrode

Question 9

faster contractions tend to excite blank motor units and depress blank ones

Answer 9

larger, smaller

Question 10

EMG has near linear relationship with force produced during controlled blank contractions

Answer 10

isometric

Question 11

linear relationship does not hold true for blank contractions

Answer 11

eccentric, concentric

Question 12

electrical activity of muscle is measure in blank

Answer 12

microvolts

Question 13

active electrodes detect electrical activity from the blank firing in the muscle

Answer 13

motor units

Question 14

differential blank decreases extraneous noise

Answer 14

amplification

Question 15

ability of the differential amplifier to eliminate common noise between the two active electrodes is called the blank

Answer 15

common mode rejection ratio

Question 16

once amplified, any remaining noise in the resultant signal is blank

Answer 16

filtered

Question 17

the resulting amplified and filtered signal is known as blank activity

Answer 17

raw

Question 18

since emg-b units measure the overall increase and decrease in elecctrical activity, the raw activity must be blank

Answer 18

rectified

Question 19

rectified means that all blank defelected signals must be flipped blank toward the blank pole

Answer 19

upward, positive

Question 20

emg biofeedback is advantageous because it provides immediate reward for blank changes that may be too small to see

Answer 20

performance

Question 21

when the goal is to increase the EMG signal from the target muscle

Answer 21

motor recruitment

Question 22

when the goal is to decrease the emg signal from the target muscle

Answer 22

motor inhibition

Question 23

goal is to decrease undesirable muscle tension to achieve muscle relaxation and stress reduction

Answer 23

total body relaxation

Question 24

prepare skin for emg biofeedback by blank

Answer 24

cleaning with alcohol