EMG Flashcards
therapeutic use of instrumentation to detect and feedback electric signals from motor unit action potentials (MUAP) that are generated by active muscle
emg biofeedback
MUAP signals are converted into blank signals to reinforce voluntary muscle control
audiovisual
emg feedback does not measure direct blank events
physiologic
the biofeedback unit records some aspect that is highly blank with an actual physiologic event
correlated
blank activity is an example of biofeedback unit measurement
electromyographic
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
depolarization, alpha motor
depolarization results in increased blank of muscle membrane to potassium and sodium
permeability
the changes in the electrochemical gradient created by the MUAP can be detected by a blank
electrode
faster contractions tend to excite blank motor units and depress blank ones
larger, smaller
EMG has near linear relationship with force produced during controlled blank contractions
isometric
linear relationship does not hold true for blank contractions
eccentric, concentric
electrical activity of muscle is measure in blank
microvolts
active electrodes detect electrical activity from the blank firing in the muscle
motor units
differential blank decreases extraneous noise
amplification
ability of the differential amplifier to eliminate common noise between the two active electrodes is called the blank
common mode rejection ratio
once amplified, any remaining noise in the resultant signal is blank
filtered
the resulting amplified and filtered signal is known as blank activity
raw
since emg-b units measure the overall increase and decrease in elecctrical activity, the raw activity must be blank
rectified
rectified means that all blank defelected signals must be flipped blank toward the blank pole
upward, positive
emg biofeedback is advantageous because it provides immediate reward for blank changes that may be too small to see
performance
when the goal is to increase the EMG signal from the target muscle
motor recruitment
when the goal is to decrease the emg signal from the target muscle
motor inhibition
goal is to decrease undesirable muscle tension to achieve muscle relaxation and stress reduction
total body relaxation
prepare skin for emg biofeedback by blank
cleaning with alcohol
