Concentric needle, isometric contraction. Stashuk DW, Univ Waterloo, CA.

Single-channel EMG signals recorded by concentric needle electrode during moderate isometric contractions. The annotations are the result of the Decomposition-based Quantitative EMG (DQEMG) program. (Doherty TJ, Stashuk DW. Decomposition-based quantitative electromyography: methods and initial normative data in five muscles. Muscle Nerve, 28: 204-211, 2003.)