Brief high-frequency bursts of action potentials shape neural coding. In spinal motoneurons, they appear as doublets, closely spaced spike pairs observed for a century that amplify muscle force nonlin...

Objective: Identifying the activity of motor neurons (MNs) non-invasively is possible by decomposing signals from muscles, e.g., surface electromyography (EMG) or ultrasound. The theoretical backgroun...