EMG Biofeedback

Biofeedback is a technique used to provide information to the user about ____ or ____ processes

physiological or biomechanical

What is the clinical use of Biofeedback?

Improve self-awareness & control of specific, targeted process

What biofeedback classification provides accurate external info reflective of internal biological process?

Direct

What biofeedback classification provides external processed info representative of internal biological processes?

Transformed

EMG is a measure of

electrical activity in muscles

True or False: EMG measures muscle contractions and muscle strength

False

What are some determinants of motor unit recruitment?

Force required for activity
Speed of contraction
Mode of muscle contraction

What type of feedback does the EMG provide?

Visual feedback
Auditory feedback

Whats the average resting muscle EMG amplitude

2 uV

Whats the average healthy muscle contraction EMG?

20-30 mV

What does EMG High signal gain mean?

Sensitive enough to detect the smallest amounts of electrical activity

What does EMG Low signal gain mean?

Muscle-reeducation during which an athlete may produce several hundred uV of EMG activity

What are some indications for Uptraining (Facilitory) Biofeedback?

Increase muscle activity post-op
Increase volitional motor control
Increase muscle performance

What are some indications for Downtraining (Inhibitory) Biofeedback?

Decrease muscle activity related to spasticity
Decrease muscle activity related to postural stress
Decrease muscle activity related to chronic pain

What are the main contraindications/precautions for EMG Biofeedback?

Acute inflammatory conditions where muscular contraction could potentially exacerbate

Intracavital sensors (pregnancy, bladder/vaginal infections)

What are some potential adverse effects of EMG Biofeedback?

Dyspnea
Fatigue
Pain