EMG Lab
Three tools in one. Needle EMG — watch and hear real concentric-needle motor-unit potentials (normal vs myopathy vs neuropathy). Myotome — pick a level or a muscle and trace it from spinal root through plexus and named nerve, with its action, bedside test, reflex and the exercises that train it. Dermatomes — the sensory map. Real open data — see credits below.
needle EMG · 4 kHz
Recording
Sound
Scope
All real recordings, openly licensed. Concentric-needle EMG of the tibialis anterior during gentle dorsiflexion,
from “Examples of Electromyograms” (emgdb) on PhysioNet,
ODC-BY 1.0 — a normal subject, a polymyositis (myopathy) case, and an L5-radiculopathy (neuropathy) case.
Short active-contraction windows were extracted for the web; the 🔊 Listen button plays the real EMG waveform as audio,
and relative loudness reflects the real signal amplitude. Motor-unit morphology and recruitment described per standard
electrodiagnostic references (AANEM; Preston & Shapiro, Electromyography and Neuromuscular Disorders). Not for diagnosis.
