PTA145-Unit4-EMG-Biofeedback Flashcards
what is EMG Biofeedback?
process of detecting physiologicial activity
- electrical activity is amplified and converted into signals
- audio, visual or both
how many electrodes?
three
- 2 active
- 1 reference
4 reasons to use EMG Biofeedback?
- re-educate muscle - elicit contraction
- facilitate muscular relaxation
- control blood pressure & heart rate
- decrease physical signs of emotional stress
spell out EMG
electromyographic
EMG biofeedback different than electrical stimulation
does not affect the injury response
- assists with voluntary functions
3 contraindications to EMG Biofeedback
- if muscle tension or joint motions would cause further injury
- if patient is prohibited from moving joint or doing isometric
- if there are unstable fractures or injuries to joint structure
why one reference electrode?
to help the validity of the response
where to place active electrode
over muscle belly
who does the work?
patient does the work
name 4 types of biofeedback
- electromyographic
- photoplethysmography
- peripheral temperature
- galvanic skin response
why photoplethysmography
for reduce blood pressure and heart rate
why peripheral temperature
detect relaxed state
- (increased temp)
detect stress, fear, anxiety
- (decreased temp)
why galvanic
to decrease stress
name 3 things that happen when emg biofeedback is used for muscle stimulation
- re-establishes sensory-motor loops
- visual/auditory cues stimulate cerebral areas that normally receive proprioceptive information
- combined with visual cue of actually watching the muscle contract, assists in reopening a neural loop that sends efferent signals to the appropriate muscles
name 2 things about using emg biofeedback for muscle relaxation
- same as for stimulation, but with inhibited pathways
- used in cases of subconscious muscle guarding
