Biofeedback Flashcards
What is biofeedback?
use of instrumentation to bring physiological events to conscious awareness
Converts what is being measured into feedback that optimizes the desired effect
3 components that make biofeedback effective
1) Primarily a teaching aid
- -help train deficient athlete
2) Must be timely
- -immediate
3) Must be precise
- -simplistic to fxnal
Instrumentation used
electrical units, mirrors, taping, voice cues
can be objective or subjective
Instantaneous or over time
EMG Biofeedback
surface electrodes transform signal
- -permits awareness of neural recruitment of muscles
- -electrical activity of muscle recorded and transformed into visual and auditory signals
EMG Instrumentation
Fine internal wires
self adhesive
small electrical unit or large machine
Filtering
removal of “noise” from high and low frequency sources–has to be filtered for relevant activity to be determined
Muscle activity is 80-250Hz—anything above or below must be filtered out
Amplification
process of taking a raw signal of muscle in the microvolt range and amplifying to millivolt range
Rectification
All deflections from the isoelectic line are made (+)/(-)
allows for all positive or all negative reading
Integration
integrated signal-fitting curve through sample points
smoothes signal-can be quantified
Indications
muscle re-ed
relaxation—don’t use a lot
ROM
Goal: decreased pain or increased function
Restoring Voluntary Control
decreased ability to contract muscles fully due to neural inhibition
Use biofeedback to:
-mimic mvmt patterns
-help enhance control of voluntary contractions
-train regonition and firing patterns of muscles
Concerns
total inability to contract muscle
inappropriate feedback
lack of adjustment to sensitivity of EMG
lack of increased challenges
Contraindications
patient prohibited from moving joint
isometric contractions are contraindicated
