Jitter analysis with concentric needle electrode in the masseter muscle for the diagnosis of generalised myasthenia gravis

Highlights • This is the first study where jitter analysis using a concentric needle electrode during voluntary contraction of the masseter muscle in patients with generalised myasthenia gravis (MG) was performed. • Jitter analysis of the masseter muscle during voluntary contraction was found to be as informative as other muscles (periocular and EDC) in generalised MG. • Jitter analysis with concentric needle electrode in the masseter muscle is easy to perform.