Abstract:
:Human short-latency cortical responses to median nerve stimulation were investigated with a new high resolution electroencephalography technology that markedly enhanced spatial details of somatosensory-evoked potentials (SEPs). Maximum amplitude potentials were estimated over contralateral and/or frontal-mesial scalp regions about 20, 22, 24, 26, 30, 32 and 45 ms following the stimulation. Frontal-lateral P20-N24-N30-P45 and parietal-lateral N20-P24-P30-N45 showed dipolar patterns, whereas frontal-mesial N24-N30-P45 and central-lateral P22-N26-N32-P45 presented no clearcut dipole counterpart. Plausibly, the spatially enhanced frontal-parietal SEP components were generated (tangential dipoles) within the lateral central sulcus cortex, and anticipated the central-lateral and frontal-mesial components generated (radial dipoles) from the crown of the pre- and/or post-central gyri and the supplementary motor area, respectively.
journal_name
Neuroreportjournal_title
Neuroreportauthors
Urbano A,Babiloni F,Babiloni C,Ambrosini A,Onorati P,Rossini PMdoi
10.1097/00001756-199710200-00011subject
Has Abstractpub_date
1997-10-20 00:00:00pages
3239-43issue
15eissn
0959-4965issn
1473-558Xjournal_volume
8pub_type
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