PMID: 2106012Jan 1, 1990Paper

Pain-related somatosensory evoked potentials in cortical reflex myoclonus

Journal of Neurology, Neurosurgery, and Psychiatry
R KakigiY Kuroda

Abstract

To elucidate the sensitivity to pain stimuli in patients with cortical reflex myoclonus, pain-related somatosensory evoked potentials (pain SEPs) following CO2 laser stimulation and conventional electrically-stimulated SEPs (electric SEPs) were compared in four patients with cortical reflex myoclonus. The P25 peak of electric SEPs was considerably enhanced but the P320 potential of pain SEPs was of normal amplitude in all patients. After medication, myoclonus was reduced and the amplitude of P25 was decreased, but P320 showed no change. In our previous study of the scalp distribution in normal subjects, a subcortical site, probably the thalamus, was considered to be the generator source of P320. Because most pain stimuli do not reach the cortex, patients with cortical reflex myoclonus are not sensitive to pain stimuli and P320 in pain SEPs is not enhanced.

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Citations

Dec 1, 1991·Muscle & Nerve·R KakigiH Shibasaki
Feb 1, 1992·Journal of the Neurological Sciences·R KakigiH Shibasaki
Jan 1, 1996·Journal of the Neurological Sciences·S WatanabeM Shimojo
Jan 1, 1991·Electroencephalography and Clinical Neurophysiology·R Kakigi, H Shibasaki
Jul 1, 1991·Electroencephalography and Clinical Neurophysiology·B BrommJ Lankers
Mar 1, 1992·Electroencephalography and Clinical Neurophysiology·R KakigiH Shibasaki
Jul 1, 1996·Electroencephalography and Clinical Neurophysiology·M ValerianiF Mauguière
Dec 18, 2003·Neurophysiologie clinique = Clinical neurophysiology·Rolf-Detlef TreedeUlf Baumgärtner
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Mar 29, 2005·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Ryusuke KakigiYohei Tamura
Aug 6, 2000·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·R KakigiH Yamasaki
Apr 1, 1992·Journal of Neurology, Neurosurgery, and Psychiatry·R Kakigi, H Shibasaki
Feb 19, 2000·Muscle & Nerve·H Shibasaki
Nov 18, 2004·Muscle & Nerve·Hiroshi Shibasaki, Mark Hallett

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