Neurophysiological Atlas Created by Mapping of Clinical Responses Elicited on Electrical Stimulation of the Human Thalamus

1992 ◽  
Vol 58 (1-4) ◽  
pp. 39-44 ◽  
Author(s):  
Masafumi Yoshida
Keyword(s):  
Electrical Stimulation ◽  
Human Thalamus ◽  
Clinical Responses ◽  
Stimulation Of

Somatosensory, motor, and reaching/grasping responses to direct electrical stimulation of the human cingulate motor areas

2008 ◽  
Vol 109 (4) ◽  
pp. 593-604 ◽  
Author(s):  
Serge Chassagnon ◽  
Lorella Minotti ◽  
Stéphane Kremer ◽  
Dominique Hoffmann ◽  
Philippe Kahane
Keyword(s):  
Electrical Stimulation ◽  
Epilepsy Surgery ◽  
Supplementary Motor Area ◽  
Premotor Cortex ◽  
Epileptogenic Zone ◽  
Imaging Studies ◽  
X Ray ◽  
Clinical Responses ◽  
Stimulation Of ◽  
Motor Areas

Object Surgery for frontal lobe drug-resistant epilepsies is often limited by the apparent widespread distribution of the epileptogenic zone. Recent advances in the parcellation of the medial premotor cortex give the opportunity to reconsider “seizures of the supplementary motor area” (SMA), and to assess the contribution of cingulate motor areas (CMAs), SMA proper (SMAp), and pre-SMA to the symptomatology of premotor seizures. Methods The authors reviewed the results of extraoperative electrical stimulation (ES) applied in 52 candidates for epilepsy surgery who underwent stereotactic intracerebral electroencephalographic recordings, focusing on ES of the different medial premotor fields; that is, the anterior and posterior CMA, the SMAp, and the pre-SMA. The ES sites were localized by superposition of the postoperative lateral skull x-ray and the preoperative sagittal MR imaging studies. Results Among 94 electrodes reaching the medial premotor wall, 57 responses were obtained from the anterior CMA (13 cases), the posterior CMA (11), the pre-SMA (18), and the SMAp (15). The ES of the pre-SMA and SMAp gave rise most often to a combination of motor (31 cases), speech-related (22), or somatosensory (3) elementary symptoms. The ES of the CMA yielded simple (17 of 24) more often than complex responses (7 of 24), among which sensory symptoms (7) were overrepresented. Irrepressible exploratory reaching/grasping movements were elicited at the vicinity of the cingulate sulcus, from the anterior CMA (3 cases) or the pre-SMA (1). Clinical responses to ES were not predictive of the postoperative neurological outcome. Conclusions These findings might be helpful in epilepsy surgery candidates, to better target investigation of the CMA, pre-SMA, and SMAp, and therefore to provide a better understanding of premotor seizures.

scholarly journals Mapping short-latency cortical responses to electrical stimulation of thalamic motor nuclei by increasing sampling rate - a technical report

2019 ◽  
Author(s):  
Emilia Toth ◽  
Ganne Chaitanya ◽  
Sandipan Pati
Keyword(s):  
Electrical Stimulation ◽  
Sampling Rate ◽  
Short Latency ◽  
Mapping Technique ◽  
Anterior Nucleus ◽  
Human Thalamus ◽  
Technical Report ◽  
Cortical Responses ◽  
Eloquent Cortex ◽  
Stimulation Of

AbstractDirect electrical stimulation (DES) of the cortex is a clinically indispensable brain mapping technique that provides reliable information about the distribution of eloquent cortex and its connectivity to the white matter bundles. Here we present a technical report on mapping the short latency cortical responses to stimulation of the ventral anterior nucleus of human thalamus. Reliable downstream responses were noted in the regions connected to the ventral anterior nucleus i.e. superior and inferior frontal gyri, supplementary motor area and limbic substructures (cingulate gyrus and hippocampus).

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