Somatosensory Evoked Potentials and Jerk-Locked EEG Back-Averaging in Myoclonic Epilepsy
| Autor: | P. Van den Bergh, Jean-Michel Guerit, Y. Gobiet, Emile-Christian Laterre |
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| Rok vydání: | 1994 |
| Předmět: |
Male
Epilepsies Myoclonic Electroencephalography Somatosensory system Functional Laterality Epilepsy Evoked Potentials Somatosensory Humans Medicine Sensory cortex Dominance Cerebral Aged Afferent Pathways Brain Mapping Fourier Analysis medicine.diagnostic_test business.industry Motor Cortex Signal Processing Computer-Assisted Somatosensory Cortex Middle Aged medicine.disease Median Nerve medicine.anatomical_structure Neurology Somatosensory evoked potential Myoclonic epilepsy Neurology (clinical) medicine.symptom business Myoclonus Neuroscience Motor cortex |
| Zdroj: | European Neurology. 34:49-54 |
| ISSN: | 1421-9913 0014-3022 |
| DOI: | 10.1159/000119509 |
| Popis: | Median nerve somatosensory evoked potentials (SEPs) and jerk-locked EEG back-averaging (JLA) were performed in 2 patients with left-hand myoclonus. Both SEPs were characterized by a normal parietal N20 and an enhanced N27-P27 fronto-parietal complex, but the giant central N40 described by most authors was only observed in case 1. Similarily, the aspect of JLA clearly differed in both patients. We hypothetize that both patients exhibited signs of an increased drive of the motor cortex by inputs coming from the sensory cortex. This increased drive could be mediated by the cortico-cortical connexions from areas 1-3 to area 4. In contrast, we suggest that signs of primary hyperexcitability of the motor cortex were only present in case 1, as suggested by the presence of an enhanced N40 in SEPs and the results of JLA studies. |
| Databáze: | OpenAIRE |
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