Recognize activity at rest
Spontaneous activity
Describe regularity, morphology and firing pattern before assigning pathological meaning.
3 learning sections✓ Read
WAVEFORM CLASSROOM
Make sense of the waveform
Observe shape and timing, then connect the discharge source with its limitations. Every trace is synthetic.
Synthetic teaching signalNegative upward ↑
Time and amplitude define this synthetic plot's scale, not normal limits or disease thresholds. Gain changes display scaling only.
Connect morphology to the principles
Compare neurogenic and myopathic patterns
MUAP morphology & recruitment
Relate motor-unit morphology and number to the force being produced.
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Myotonia and peripheral nerve hyperexcitability
Myotonic vs neuromyotonic discharges
Similar names can describe activity from different physiological sources.
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References and further reading
- Electrodiagnostic evaluation of myopathies (2013) ↗Paganoni & Amato · PM&R Clinics · Peer-reviewed review · Link accessed 2026-09-08
- Upper and Lower Extremity Nerve Conduction Studies (2023) ↗AANEM · Technical course · Link accessed 2026-09-08
- Radiation Induced Plexopathy ↗AAPM&R KnowledgeNow · Society educational review · Link accessed 2026-09-08
Educational synthesis; independent neuromuscular specialist review is pending. Publication dates and compilation dates are distinct. This is an original teaching synthesis; consult the source for complete methods and criteria.