06-19: Electromyography, Biofeedback

Question 1

Electromyography

Answer 1

• Evaluates motor unit activity
• Uses needles or electrodes
• Normal, relaxed muscle exhibits electrical silence
• Activity at rest = abnormal

Question 2

Biofeedback

Answer 2

• Use of visual or auditory feedback about motor performance, kinesthetic performance or physiological performance
• Motor activity: electrical activity of muscle is measured, provides visual or auditory feedback; pt tries to exceed (contract) or relax (reduce) the original level of activity