Dipole modelling of median nerve SEPs in normal subjects and patients with small subcortical infarcts
| Autor: | J. Moleman, R.P. Schoobaar, D.F. Stegeman, H. Franssen |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Adult
Male Adolescent Electrodiagnosis Models Neurological Thalamus Equivalent dipole Evoked Potentials Somatosensory Reaction Time medicine Humans Child Aged Physics medicine.diagnostic_test Median nerve stimulation General Neuroscience Brain Electroencephalography Cerebral Infarction Anatomy Middle Aged Median nerve Median Nerve Dipole Somatosensory evoked potential Female Neurology (clinical) |
| Zdroj: | Electroencephalography and Clinical Neurophysiology/Evoked Potentials Section. 84:401-417 |
| ISSN: | 0168-5597 |
| DOI: | 10.1016/0168-5597(92)90027-9 |
| Popis: | Somatosensory evoked potentials (SEPs) to median nerve stimulation were analyzed by means of spatio-temporal dipole modelling in 6 normal subjects and 8 patients with small infarcts in the thalamo-cortical radiation or thalamus. The SEPs could be modelled by a tangentially and a radially oriented equivalent dipole in the region of the contralateral cortical hand area and an equivalent dipole located in the region of the brain-stem. In 3 patients with absence or reduction of amplitudes of cortically generated SEP components, the activity of both cortical dipoles was lost or reduced. In 2 patients the frontally recorded SEP component P20 was lost; in one of them the activity of mainly the tangential dipole was reduced. |
| Databáze: | OpenAIRE |
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