6533b828fe1ef96bd128843b
RESEARCH PRODUCT
Scalp, basal epidural and intravascular far-field recordings after median nerve stimulation: evidence for a separate N18a potential
R. BesserJürgen KoehlerPeter StoeterPeter P. UrbanH. C. Hopfsubject
Epidural SpacePhysiologyArteriovenous MalformationsBasal (phylogenetics)Evoked Potentials Somatosensorymedicine.arteryHealthy volunteersReaction TimemedicineBasilar arteryHumansCaudal arteryEpilepsyScalpbusiness.industryMedian nerve stimulationAnatomyElectric StimulationSensory SystemsElectrodes ImplantedMedian Nervemedicine.anatomical_structureSomatosensory evoked potentialBasilar ArteryScalpBrainstembusinessBrain Stemdescription
Far-field somatosensory evoked potentials (SSEPs) after median nerve stimulation were recorded from scalp- (Fz), epidural- (ED) and intravascular electrodes (basilar artery [Bas]) to study the nature of the controversial N18a component of the widespread N18 potential. In healthy volunteers frequently an N18a potential was recorded at Fz. Simultaneous Fz and ED recordings at the pontomesencephalic junction as well as Bas-recordings at the caudal basilar artery showed N18a components identical in latency and shape. With intravascular recordings the shapes differed between the top of the basilar artery and the caudal artery recordings. These findings support the existence of a separate N18a potential. The generator of the N18a is likely to be localized within the upper brainstem.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-09-20 | Somatosensory & Motor Research |