Abstract:
:Somatosensory evoked potentials to median nerve (MN) stimulation were recorded by stereotactically implanted electrodes in the frontal lobe of two epileptic patients in order to evaluate whether short-latency cortical responses could be generated in the supplementary motor area (SMA)-proper. In both patients two potentials, called P20 and N30 responses, showed a decreasing amplitude from the most superficial to the deepest contacts and were recorded in the white as well in the grey matter of the frontal lobe. Furthermore, no phase reversal of both P20 and N30 potentials was identifiable along electrode trajectories. Our results suggest that short-latency somatosensory evoked responses recorded in the SMA-proper contralateral to MN stimulation are volume conducted from remote cortical generators.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Barba C,Valeriani M,Restuccia D,Colicchio G,Faraca G,Tonali P,Mauguière Fdoi
10.1016/s0304-3940(03)00378-1keywords:
subject
Has Abstractpub_date
2003-07-03 00:00:00pages
161-4issue
3eissn
0304-3940issn
1872-7972pii
S0304394003003781journal_volume
344pub_type
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