TY - JOUR
T1 - The human supplementary motor area-proper does not receive direct somatosensory inputs from the periphery: data from stereotactic depth somatosensory evoked potential recordings.
AU - Restuccia, Domenico
AU - Valeriani, Massimiliano
AU - Colicchio, Gabriella
AU - Tonali, Pietro Attilio
AU - 33184,
AU - Barba, Carmen
AU - FACOLTA', DI MEDICINA E CHIRURGIA "A.GEMELLI"
AU - Neuroscienze, ROMA - Dipartimento di
AU - FACOLTA', DI PSICOLOGIA
AU - Faraca, Giovanna
AU - Mauguiere, F.
PY - 2003
Y1 - 2003
N2 - 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.
AB - 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.
KW - Supplementar motor area-proper
KW - epilepsy
KW - evoked potentials
KW - intracranial recordings
KW - somatosensory evoked potential
KW - Supplementar motor area-proper
KW - epilepsy
KW - evoked potentials
KW - intracranial recordings
KW - somatosensory evoked potential
UR - http://hdl.handle.net/10807/34011
M3 - Article
SP - 161
EP - 164
JO - Neuroscience Letters
JF - Neuroscience Letters
SN - 0304-3940
ER -