scholarly journals Identification of Reliable Sulcal Patterns of the Human Rolandic Region

2016 ◽  
Vol 10 ◽  
Author(s):  
Charles Mellerio ◽  
Marie-Noël Lapointe ◽  
Pauline Roca ◽  
Sylvain Charron ◽  
Laurence Legrand ◽  
...  
Keyword(s):  
Rolandic Region

Diffusion tensor tractography detection of functional pathway for the spread of epileptiform activity between temporal lobe and Rolandic region

2009 ◽  
Vol 26 (2) ◽  
pp. 185-190 ◽  
Author(s):  
Ratan D. Bhardwaj ◽  
Sina Zarei Mahmoodabadi ◽  
Hiroshi Otsubo ◽  
O. Carter Snead ◽  
James T. Rutka ◽  
...  
Keyword(s):  
Temporal Lobe ◽  
Diffusion Tensor ◽  
Epileptiform Activity ◽  
Diffusion Tensor Tractography ◽  
Functional Pathway ◽  
Rolandic Region

scholarly journals Electrical Status Epilepticus in Sleep: Is this a Focal or Generalized Pattern?

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Raphael R. Almeida ◽  
Ana Carolina Coan ◽  
Marilisa M Guerreiro
Keyword(s):  
Status Epilepticus ◽  
Clinical Data ◽  
Epileptiform Activity ◽  
Rolandic Epilepsy ◽  
Epileptiform Discharges ◽  
Epileptic Syndromes ◽  
Epileptic Discharges ◽  
Genetic Epilepsies ◽  
Rolandic Region ◽  
Correlate Data

Objectives: To evaluate the spatial distribution of the epileptiform activity in electrical status epilepticus in sleep (ESES) and to correlate data from electroencephalograms (EEGs) with clinical and neuroimaging variables. Methods: From 2008 to 2015, 162 reports (1.01%) out of 16,000 EEGs, from 23 patients, showed ESES. We selected one representative EEG per patient. Clinical data was collected retrospectively. Neuroimaging examinations were reviewed. The EEGs were classified as generalized ESES (ESESg) and focal ESES (ESESf) according to the distribution of epileptiform discharges. Results: From the 23 patients, 5 were classified as ESESg and 18 as ESESf. In ESESf, there was a prevalence of focal epileptic discharges in the centrotemporal regions. Abnormal neuroimaging occurred in 100% of the patients with ESESg and in 38.9% of the patients with ESESf (p=0.037). Other clinical data did not show significant differences between the groups. All patients with ESESg had structural etiology, while only 39% of patients with ESESf had structural etiology and the remaining 61% potentially genetic epilepsies of the rolandic spectrum. Conclusion: ESESg occurred predominantly in patients with structural lesions, while most patients with ESESf had normal neuroimaging scans and electrical dysfunction mainly in the rolandic region. Significance: ESESg seems to occur mostly in structural epilepsies. Distinctly, ESESf occurs in epileptic syndromes within the functional spectrum of rolandic epilepsy.

Patterns of functional magnetic resonance imaging activation in association with structural lesions in the rolandic region: a classification system

2001 ◽  
Vol 94 (6) ◽  
pp. 946-954 ◽  
Author(s):  
Alexandre C. Carpentier ◽  
R. Todd Constable ◽  
Michael J. Schlosser ◽  
Alain de Lotbinière ◽  
Joseph M. Piepmeier ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Motor Cortex ◽  
Motor Skills ◽  
Classification Scheme ◽  
Surgical Intervention ◽  
Functional Magnetic Resonance ◽  
Content Type ◽  
Rolandic Region ◽  
Fine Print

Object. Functional magnetic resonance (fMR) imaging of the motor cortex is a potentially powerful tool in the preoperative planning of surgical procedures in and around the rolandic region. Little is known about the patterns of fMR imaging activation associated with various pathological lesions in that region or their relation to motor skills before surgical intervention. Methods. Twenty-two control volunteers and 44 patients whose pathologies included arteriovenous malformations (AVMs; 16 patients), congenital cortical abnormalities (11 patients), and tumors (17 patients) were studied using fMR imaging and a hand motor task paradigm. Activation maps were constructed for each participant, and changes in position or amplitude of the motor activation on the lesion side were compared with the activation pattern obtained in the contralateral hemisphere. A classification scheme of plasticity (Grades 1–6) based on interhemispheric pixel asymmetry and displacement of activation was used to compare maps between patients, and relative to hand motor dexterity and/or weakness. There was 89.4% interobserver agreement on classification of patterns of fMR imaging activation. Displacement of activation by mass effect was more likely with tumors. Cortical malformations offer a much higher functional reorganization than AVMs or tumors. High-grade plasticity is recruited to compensate for severe motor impairment. Conclusions. Pattern modification of fMR imaging activation can be systematized in a classification of motor cortex plasticity. This classification has shown good correlation among grading, brain lesions, and motor skills. This proposal of a classification scheme, in addition to facilitating data collection and processing from different institutions, is well suited for comparing risks associated with surgical intervention and patterns of functional recovery in relation to preoperative fMR imaging categorization. Such studies are underway at the authors' institution.

Electrical Activity of Rolandic Region in Unanesthetized Monkey

Neurology ◽  
1957 ◽  
Vol 7 (7) ◽  
pp. 490-490 ◽  
Author(s):  
L. Kruger ◽  
C. Henry
Keyword(s):  
Electrical Activity ◽  
Rolandic Region

Deletions in 16p13 including GRIN2A in patients with intellectual disability, various dysmorphic features, and seizure disorders of the rolandic region

Epilepsia ◽  
2010 ◽  
Vol 51 (9) ◽  
pp. 1870-1873 ◽  
Author(s):  
Constanze Reutlinger ◽  
Ingo Helbig ◽  
Barbara Gawelczyk ◽  
Jose Ignacio Martin Subero ◽  
Holger Tönnies ◽  
...  
Keyword(s):  
Intellectual Disability ◽  
Seizure Disorders ◽  
Dysmorphic Features ◽  
Rolandic Region

Surgical treatment of meningiomas located in the rolandic area: the role of navigated transcranial magnetic stimulation for preoperative planning, surgical strategy, and prediction of arachnoidal cleavage and motor outcome

2020 ◽  
Vol 133 (1) ◽  
pp. 107-118 ◽  
Author(s):  
Giovanni Raffa ◽  
Thomas Picht ◽  
Antonino Scibilia ◽  
Judith Rösler ◽  
Johannes Rein ◽  
...  
Keyword(s):  
Surgical Treatment ◽  
Transcranial Magnetic Stimulation ◽  
Magnetic Stimulation ◽  
Cleavage Plane ◽  
Surgical Strategy ◽  
Motor Deficit ◽  
Navigated Transcranial Magnetic Stimulation ◽  
Motor Outcome ◽  
Rolandic Region

OBJECTIVESurgical treatment of convexity meningiomas is usually considered a low-risk procedure. Nevertheless, the risk of postoperative motor deficits is higher (7.1%–24.7% of all cases) for lesions located in the rolandic region, especially when an arachnoidal cleavage plane with the motor pathway is not identifiable. The authors analyzed the possible role of navigated transcranial magnetic stimulation (nTMS) for planning resection of rolandic meningiomas and predicting the presence or lack of an intraoperative arachnoidal cleavage plane as well as the postoperative motor outcome.METHODSClinical data were retrospectively collected from surgical cases involving patients affected by convexity, parasagittal, or falx meningiomas involving the rolandic region, who received preoperative nTMS mapping of the motor cortex (M1) and nTMS-based diffusion tensor imaging (DTI) fiber tracking of the corticospinal tract before surgery at 2 different neurosurgical centers. Surgeons’ self-reported evaluation of the impact of nTMS-based mapping on surgical strategy was analyzed. Moreover, the nTMS mapping accuracy was evaluated in comparison with intraoperative neurophysiological mapping (IONM). Lastly, we assessed the role of nTMS as well as other pre- and intraoperative parameters for predicting the patients’ motor outcome and the presence or absence of an intraoperative arachnoidal cleavage plane.RESULTSForty-seven patients were included in this study. The nTMS-based planning was considered useful in 89.3% of cases, and a change of the surgical strategy was observed in 42.5% of cases. The agreement of nTMS-based planning and IONM-based strategy in 35 patients was 94.2%. A new permanent motor deficit occurred in 8.5% of cases (4 of 47). A higher resting motor threshold (RMT) and the lack of an intraoperative arachnoidal cleavage plane were the only independent predictors of a poor motor outcome (p = 0.04 and p = 0.02, respectively). Moreover, a higher RMT and perilesional edema also predicted the lack of an arachnoidal cleavage plane (p = 0.01 and p = 0.03, respectively). Preoperative motor status, T2 cleft sign, contrast-enhancement pattern, and tumor volume had no predictive value.CONCLUSIONSnTMS-based motor mapping is a useful tool for presurgical assessment of rolandic meningiomas, especially when a clear cleavage plane with M1 is not present. Moreover, the RMT can indicate the presence or absence of an intraoperative cleavage plane and predict the motor outcome, thereby helping to identify high-risk patients before surgery.

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