Ipsilateral median somatosensory evoked potentials recorded from human somatosensory cortex

Electroencephalography and Clinical Neurophysiology
S NoachtarG Klem

Abstract

Somatosensory evoked potentials (SEP) to ipsilateral and contralateral median nerve stimulations were recorded from subdural electrode grids over the perirolandic areas in 41 patients with medically refractory focal epilepsies who underwent evaluation for epilepsy surgery. All patients showed clearly defined, high-amplitude contralateral median SEPs. In addition, four patients showed ipsilateral SEPs. Compared with the contralateral SEPs, ipsilateral SEPs were very localized, had a different spatial distribution, were of considerably lower amplitude, had a longer latency (1.2-17.8 ms), did not show an initial negativity, and were markedly attenuated during sleep. Stimulation of the subdural electrodes overlying the sensory hand area was associated with contralateral hand paresthesias, but no ipsilateral hand paresthesias, occurred. It was concluded that subdurally recorded cortical SEPs to ipsilateral stimulation of the median nerve (M) reflect unconscious sensory input from the hand possibly serving fast bimanual hand control. The anatomical pathway of these ipsilateral short-latency MSEPs is not yet known. Transcallosal transmission seems unlikely because of the short delay between the ipsilateral and contralateral responses ...Continue Reading

References

Jan 1, 1991·Electroencephalography and Clinical Neurophysiology·C BaumgartnerW W Sutherling
Sep 1, 1986·Electroencephalography and Clinical Neurophysiology·M P DeiberF Mauguiere
Mar 1, 1989·Electroencephalography and Clinical Neurophysiology·R O AddyE Wyllie
Oct 1, 1973·Electroencephalography and Clinical Neurophysiology·R Q Cracco
Dec 13, 1974·Nature·D PapakostopoulosH J Crow
Jan 1, 1972·Folia Psychiatrica Et Neurologica Japonica·K Tamura
Mar 1, 1984·Electroencephalography and Clinical Neurophysiology·R HariD Teszner
Jul 1, 1984·Neurology·D E WilkinsN Alvarez
Jul 1, 1993·Electroencephalography and Clinical Neurophysiology·C BaumgartnerL Deecke
Jan 6, 1978·Science·D BrennerS J Williamson

❮ Previous
Next ❯

Citations

Oct 12, 2000·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·R ZappoliV Zerauschek
May 24, 2003·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Roberto Zappoli
Jan 17, 2002·Human Movement Science·V K LimJ L Bradshaw
May 29, 1999·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·M FrotF Mauguière
Sep 19, 1998·Electroencephalography and Clinical Neurophysiology·D NakaH Suzuki
Jun 14, 2002·Brain Research. Cognitive Brain Research·David I ShoreCharles Spence
Sep 30, 1998·Current Opinion in Neurobiology·Y Iwamura
Nov 6, 2002·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Carmen BarbaF Mauguière
Mar 16, 2007·BMC Neuroscience·Zhao ZhuSrikantan S Nagarajan
Dec 5, 2008·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Felix BlankenburgJon Driver
Mar 11, 2011·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Jamie L ReedJon H Kaas
Dec 7, 2013·Experimental Brain Research·Sarah D'Amour, Laurence R Harris
Dec 18, 2014·Human Brain Mapping·Luigi TamèChristoph Braun
Nov 3, 2004·Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia·A KannoT Tominaga
Jan 24, 2006·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·E HoudayerPh Derambure
Feb 2, 2006·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Orlando SwayneKarin Rosenkranz
Jun 30, 2010·The European Journal of Neuroscience·Elina PihkoRiitta Hari
Dec 9, 2008·Current Biology : CB·Jared Medina, Brenda Rapp
Jun 18, 2016·Cognitive Neuropsychology·Luigi TamèFrancesco Pavani
Jul 9, 2016·Cognitive Neuropsychology·Jared Medina, H Branch Coslett
May 23, 2002·Brain : a Journal of Neurology·Konrad J WerhahnLeonardo G Cohen
Apr 24, 2021·Attention, Perception & Psychophysics·Farzaneh Darki, James Rankin
Sep 7, 2021·Frontiers in Systems Neuroscience·Daisuke IshiiYutaka Kohno

❮ Previous
Next ❯

Related Concepts

Related Feeds

Barrel cortex

Here is the latest research on barrel cortex, a region of somatosensory and motor corticies in the brain, which are used by animals that rely on whiskers for world exploration.