A SEEG study of ERP in motor and premotor cortices and in the basal ganglia

Cortical sources of visual evoked potentials during consciousness of executive processes

“…Furthermore, future investigations should study the thalamocortical and cortico-cortical interactions related to the primary visual consciousness as opposed to executive processes [Lamme et al, 2002;Tononi, 2001Tononi, , 2004. For this purpose, a promising approach might be the use of intracerebral stereo EEG in epilepsy patients during the pre-surgical monitoring of cerebral functions [Babiloni et al, 2004;Kuba et al, 2003;Rektor et al, 2002Rektor et al, , 2003 and paradigms in which the primary visual consciousness can be manipulated by stimulus features [Babiloni et al, 2006b;Brazdil et al, 2001;Moradi et al, 2005]. Finally, repetitive transcranial magnetic stimulation might test the hypothesis of a causal role of dorsolateral prefrontal, premotorand parietooccipital areas in the primary consciousness during visuo-spatial executive processes [Babiloni et al, 2006b].…”

Neurocognitive Aspects of Tourette Syndrome and Related Disorders

“…Also, its early onset may implicate general anticipatory processes rather than the specific cortical preparation preceding movement (Trevena & Miller, 2002). To circumvent this problem, the Lateralized Readiness Potential (LRP), which has its generators in the primary motor cortex (Requin & Riehle, 1995), the SMA (Rektor, 2002) and the basal ganglia (Rektor et al, 2003) represents an excellent candidate measure of motor processing, that could be affected in GTS. Specifically, the LRP has been shown to be a marker of selective motor activation, representing the differential engagement of the left and right motor cortices in the preparation and initiation of motor responses (Coles, 1989;Kutas & Donchin, 1980).…”

Robotic Arm and Imaging in Neurosurgical Stereotactic Interventions: Oblique Insular Electrodes Implanted in Patients with Epilepsy

“…For these authors, this procedure was mandatory in targeting the frontal or parietal mesial regions, the orbito-basal region, the amygdala and the hippocampus. The oblique approach has also been used to record epileptic activity (Rektor et al, 2002(Rektor et al, , 2003 from the basal ganglia. In our institution we believe that a safe implantation of electrodes within the insula can be achieved using an oblique stereotactic approach guided by a robotic arm, coupled with preoperative MRI and stereotactic angiography.…”