Abstract
Epileptic negative myoclonus (ENM) is an epileptic motor dysfunction characterised by brief lapses of postural tone provoked by paroxysmal cortical discharges. We report the electrophysiological and video-polygraphic findings in a patient presenting with the unusual association of ENM and brief asymmetric tonic-postural seizures of cryptogenetic origin. Focal EMG silent periods in the left deltoid muscle (mean duration 81.2 ± 16.4 ms), time-locked with vertex spikes were present. The time lag between spikes and ENM was 33.1 ± 4.6 ms. We suggest the involvement of mesial frontal areas in the genesis of both negative and positive motor phenomena.
Original language | English |
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Pages (from-to) | 163-167 |
Number of pages | 5 |
Journal | Epileptic Disorders |
Volume | 2 |
Issue number | 3 |
Publication status | Published - 2000 |
Keywords
- Epileptic negative myoclonus
- Frontal lobe epilepsy
- Seizure semiology
- SMA seizures
ASJC Scopus subject areas
- Clinical Neurology