Purpose: To investigate the neurophysiological features of photic reflex myoclonus (PRM) in
patients with progressive myoclonus epilepsies (PMEs) of different types (Unverricht�…

Myoclonus may be generated by any area in the central nervous system. Finding its
generator is helpful in the diagnostic process. Although clinical features have to be carefully�…

Myoclonus is a sudden brief (20–250 ms) contraction (positive myoclonus), or a brief and
sudden cessation of tonic muscle (negative myoclonus) inducing a simple jerky movement�…

Three patients with flash‐evoked myoclonus were studied electrophysiologically. Myoclonic
jerks were elicited at a fixed latency after the application of photic stimuli and were always�…

The high temporal resolution of neurophysiological recordings makes them particularly
suited to faithfully describing the time course of rapid events such as myoclonus and to�…

Objective: To study electroencephalography–electromyography (EEG–EMG) relationships in
patients with different forms of progressive myoclonic epilepsies (PME). Methods: EEG–EMG�…

Cortical or cortical reflex myoclonus is characterized by abnormally enlarged cortical
somatosensory evoked potentials (giant SEPs), which most likely reflect pathologically�…

Neurophysiological analysis of spontaneous and reflex-triggered myoclonus in a case of
epilepsia partialis continua is reported. A central positive wave (P1), part of the high voltage�…

Negative myoclonus (NM) is a motor disorder characterized by a sudden and abrupt
interruption of muscular activity. The EMG correlate of NM is a brief (< 500 ms) silent period�…

Historical note The term myoclonus covers a group of neurophysiologically diverse
phenomena, of heterogeneous etiology, whose common semiological element is�…