Pierre Wertheimer Neurological Hospital
Pierre Wertheimer Neurological Hospital
Baraduc P.,French National Center for Scientific Research |
Baraduc P.,University Claude Bernard Lyon 1 |
Thobois S.,French National Center for Scientific Research |
Thobois S.,University Claude Bernard Lyon 1 |
And 11 more authors.
Journal of Neuroscience | Year: 2013
Recent research on Parkinson's disease (PD) has emphasized that parkinsonian movement, although bradykinetic, shares many attributes with healthy behavior. This observation led to the suggestion that bradykinesia in PD could be due to a reduction in motor motivation. This hypothesis can be tested in the framework of optimal control theory, which accounts for many characteristics of healthy human movement while providing a link between the motor behavior and a cost/benefit trade-off. This approach offers the opportunity to interpret movement deficits of PD patients in the light of a computational theory of normal motor control. We studied 14 PD patients with bilateral subthalamic nucleus (STN) stimulation and 16 age-matched healthy controls, and tested whether reaching movements were governed by similar rules in these two groups. A single optimal control model accounted for the reaching movements of healthy subjects and PD patients, whatever the condition of STN stimulation (on or off). The choice of movement speed was explained in all subjects by the existence of a preset dynamic range for the motor signals. This range was idiosyncratic and applied to all movements regardless of their amplitude. In PD patients this dynamic range was abnormally narrow and correlated with bradykinesia. STN stimulation reduced bradykinesia and widened this range in all patients, but did not restore it to a normal value. These results, consistent with the motor motivation hypothesis, suggest that constrained optimization of motor effort is the main determinant of movement planning (choice of speed) and movement production, in both healthy and PD subjects. © 2013 the authors.
Guyotat J.,Pierre Wertheimer Neurological Hospital |
Chinot O.,Neuro oncological Unit |
Durand A.,Timone Hospital |
Barrie M.,Neuro oncological Unit |
And 2 more authors.
Neuro-Oncology | Year: 2010
Ependymomas account for 2% of all intracranial tumors in adults. Considerable controversy continues to exist with regard to their prognostic factors and therapeutic management due to the rarity and the heterogeneity of series reported so far. The authors report a retrospective study of a homogenous population of 114 adult patients harboring WHO grade II intracranial ependymomas from 32 French Neurosurgical Centers between 1990 and 2004. All clinico-radiological and follow-up data were analyzed, and a central pathologic review was performed by two confirmed neuropathologists. The 5- and 10-year overall survival (OS) rates were 86.1% and 81.0%, respectively; the 5- and 10-year progressionfree survival (PFS) rates were 74.6% and 58.9%, respectively. On multivariate analysis, the OS rates were associated with preoperative KPS score (P 5 = 027), extent of surgery (P 5 = 008), and tumor location (supratentorial vs infratentorial, P 5 = 012). The multivariate analysis also revealed that the risk of recurrence was associated with incomplete resection (P 5 = 001) and supratentotrial location (P 5 = 038). Moreover, adjuvant radiotherapy (RT) for patients with incompletely resected tumors is responsible for a significant improvement of both overall (P 5 = 005) and progression-free (P 5 = 002) survival. This study clearly supports the major prognostic impact of the extent of surgery in WHO grade II. Interestingly, tumor location also seems to have an actual impact on both OS and PFS. Finally, the prognostic impact of RT was found to be beneficial for incompletely resected tumors. © The Author(s) 2010.
Pallud J.,Sainte Anne Hospital |
Pallud J.,University of Paris Descartes |
Mandonnet E.,Reseau dEtude des Gliomes REG |
Mandonnet E.,Lariboisiere Hospital |
And 20 more authors.
Annals of Neurology | Year: 2010
Twelve pregnancies in 11 adult women harboring World Health Organization (WHO) grade II gliomas (GIIGs) prior to pregnancy were reviewed to address whether pregnancy affects tumor growth using a quantitative approach of the radiological velocity of diametric expansion (VDE) on successive magnetic resonance images. VDE was significantly increased during pregnancy as compared to prepregnancy (p < 0.001) and to postdelivery (p = 0.012) periods. Pregnancy increases the radiological growth rates of GIIGs. An increase in seizure frequency was observed concomitantly in 40% of cases and further oncological treatment was started after delivery in 25% of cases.
Du Montcel S.T.,Pitie Salpetriere Hospital |
Du Montcel S.T.,Modelling in Clinical Research |
Charles P.,Pitie Salpetriere Hospital |
Goizet C.,Pitie Salpetriere Hospital |
And 32 more authors.
Archives of Neurology | Year: 2012
Objectives: To evaluate disease progression and determine validity of clinical tools for therapeutic trials. Design : Prospective cohort study (36 months). Setting: Referral center. Patients: One hundred sixty-two patients with autosomal dominant cerebellar ataxia and 64 with hereditary spastic paraplegia. Main Outcome Measures: The quantitative Composite Cerebellar Functional Severity Score with the writing test (CCFSw) and Scale for the Assessment and Rating of Ataxia (SARA) score. Results: Disease worsened in patients with SCA1, SCA2, and SCA3 mutations (mean [SE] increase in CCFSw, +0.014 [0.005] to +0.025 [0.004] per year), improved in patients with SPG4 mutations (mean [SE] increase in CCFSw, -0.012 [0.003] per year; P =.02), and remained stable in patients with SCA6, SCA7, or other SCA mutations (mean [SE] increase in CCFSw, -0.015 [0.011] to +0.009 [0.013] per year) or hereditary spastic paraplegia with other SPG mutations (mean [SE] increase in CCFSw, -0.005 [0.005] per year). Progression was faster in patients with SCA2 mutations and normal alleles with 22 or fewer repeats (P =.02) and in patients with SCA3 mutations with parkinsonism and/or dystonia at baseline (P =.003). Whereas CCFSw distinguished between patients with ataxia and spasticity, SARA scores increased in both groups. A 2-arm trial with SARA score as the outcome measure would require 57 patients with SCA2 mutations, 70 with SCA1 mutations, and 75 with SCA3 mutations per group to detect a 50% reduction in disease progression (power, 80%; α =.05). Conclusions: Disease progressed faster in SCAs with polyglutamine expansions in SCA1, 2, and 3 than the other groups. Both outcome measures are suitable for therapeutic trials; SARA requires fewer patients to attain the same power, but CCFSw needs less stratification.Wedemonstrate that the choice of clinical outcome measure is critical for reliable evaluation of progression in neurodegenerative diseases. Trial Registration : clinicaltrials.gov Identifier: NCT00136630. ©2012 American Medical Association. All rights reserved.
Lefaucheur J.-P.,Henri Mondor Hospital |
Lefaucheur J.-P.,University Paris Est Creteil |
Andre-Obadia N.,Pierre Wertheimer Neurological Hospital |
Andre-Obadia N.,University of Lyon |
And 38 more authors.
Clinical Neurophysiology | Year: 2014
A group of European experts was commissioned to establish guidelines on the therapeutic use of repetitive transcranial magnetic stimulation (rTMS) from evidence published up until March 2014, regarding pain, movement disorders, stroke, amyotrophic lateral sclerosis, multiple sclerosis, epilepsy, consciousness disorders, tinnitus, depression, anxiety disorders, obsessive-compulsive disorder, schizophrenia, craving/addiction, and conversion. Despite unavoidable inhomogeneities, there is a sufficient body of evidence to accept with level A (definite efficacy) the analgesic effect of high-frequency (HF) rTMS of the primary motor cortex (M1) contralateral to the pain and the antidepressant effect of HF-rTMS of the left dorsolateral prefrontal cortex (DLPFC). A Level B recommendation (probable efficacy) is proposed for the antidepressant effect of low-frequency (LF) rTMS of the right DLPFC, HF-rTMS of the left DLPFC for the negative symptoms of schizophrenia, and LF-rTMS of contralesional M1 in chronic motor stroke. The effects of rTMS in a number of indications reach level C (possible efficacy), including LF-rTMS of the left temporoparietal cortex in tinnitus and auditory hallucinations. It remains to determine how to optimize rTMS protocols and techniques to give them relevance in routine clinical practice. In addition, professionals carrying out rTMS protocols should undergo rigorous training to ensure the quality of the technical realization, guarantee the proper care of patients, and maximize the chances of success. Under these conditions, the therapeutic use of rTMS should be able to develop in the coming years. © 2014 International Federation of Clinical Neurophysiology.
Mokhtari K.,University Pierre and Marie Curie |
Mokhtari K.,Pitie Salpetriere Group Hospital |
Ducray F.,Pierre Wertheimer Neurological Hospital |
Kros J.M.,Erasmus University Rotterdam |
And 13 more authors.
Cancer | Year: 2011
BACKGROUND: Although it has been demonstrated that the neuronal intermediate filament alpha-internexin (INA) is closely related to 1p19q codeletion in gliomas, its prognostic and predictive value has not yet been confirmed in a prospective trial. The authors of this report assessed the prognostic significance of INA expression and its correlation with relevant clinical and molecular characteristics in the prospective, randomized European Organization for Research and Treatment of Cancer (EORTC) 26951 trial of adjuvant procarbazine, lomustine, and vincristine (PCV) in patients with anaplastic oligodendroglial tumors (AOTs). METHODS: INA immunohistochemistry expression in tumors from 92 patients who were included in the EORTC 26951 trial was analyzed independently by 2 observers and was correlated with relevant clinical characteristics, including progression-free survival (PFS) and overall survival (OS), and with molecular features, including 1p/19q codeletion, isocitrate dehydrogenase 1 and 2 gene (IDH1/IDH2) mutation, and O-6 methylguanine-DNA methyltransferase (MGMT) promoter methylation status. RESULTS: INA expression was observed in 33 tumors and was strongly correlated with 1p/19q codeletion, IDH1 mutations, and MGMT promoter methylation. It was associated with significantly better PFS and OS independent of the treatment received. By using Cox proportional hazard modeling for OS with stepwise selection, INA expression, patient age, and performance status were identified as independent prognostic factors. The results indicated that INA expression may have an impact on the efficacy of combined radiotherapy plus PCV. CONCLUSIONS: In a homogeneously treated group of patients with grade III AOTs, INA expression had strong favorable prognostic significance for OS and may have predictive value for sensitivity to chemotherapy. Copyright © 2011 American Cancer Society.
Sivan-Hoffmann R.,Pierre Wertheimer Neurological Hospital |
Sivan-Hoffmann R.,Rambam Health Care Campus |
Gory B.,Pierre Wertheimer Neurological Hospital |
Gory B.,University Claude Bernard Lyon 1 |
And 10 more authors.
Israel Medical Association Journal | Year: 2016
Mechanical thrombectomy with stent retrievers is now the reference therapy for acute ischemic stroke (AIS) in the anterior circulation in association with thrombolysis. We conducted an extensive systematic review and meta-analysis to evaluate the clinical and angiographic outcomes of stent-retriever thrombectomy in patients with acute anterior circulation stroke. Available literature published to date on observational studies and three randomized trials (MR CLEAN, ESCAPE, and EXTEND-IA) involving the stent-retriever device were reviewed. Successful recanalization and favorable clinical outcome were defined by a TICI ≥ 2b and modified Rankin Scale score of ≤ 2 at 90 days following AIS, respectively. A total of 2067 patients harboring an anterior circulation stroke were treated with a stent retriever: 433 patients from 3 randomized trials involving the device and 1634 patients from observational studies. Mean NIH Stroke Scale score on admission was 16.6, and mean time from onset to recanalization was 300 minutes. Successful recanalization was achieved in 82% (95%CI 77–86, 31 studies). The 90 day favorable outcome was achieved in 47% (95%CI 42–5.2, 34 studies) with an overall mortality rate of 17% (95%CI 13–20, 31 studies). Symptomatic intracerebral hemorrhage was identified in 6% (95%CI 4–8, 32 studies). In patients with AIS caused by a proximal intracranial occlusion of the anterior circulation, stent-retriever thrombectomy is safe and restores brain reperfusion in four of five treated patients, allowing favorable clinical outcome in one of two AIS patients with large vessel occlusion. © 2016, Israel Medical Association. All rights reserved.
Ventre-Dominey J.,French Institute of Health and Medical Research |
Bourret S.,French Institute of Health and Medical Research |
Mollion H.,Pierre Wertheimer Neurological Hospital |
Broussolle E.,Pierre Wertheimer Neurological Hospital |
And 2 more authors.
Human Brain Mapping | Year: 2014
In this study, we investigated the neural substrates involved in visual working memory (WM) and the resulting effects of subthalamic nucleus (STN) stimulation in Parkinson's disease (PD). Cerebral activation revealed by positron emission tomography was compared among Parkinson patients with (PD-ON) or without (PD-OFF) STN stimulation, and a group of control subjects (CT) in two visual WM tasks with spatial (SP) and nonspatial (NSP) components. PD-OFF patients displayed significant reaction time (RT) deficits for both memory tasks. Although there were no significant differences in RT between patients with PD-ON and -OFF stimulation, patients with PD-ON stimulation performed comparably to controls. The memory tasks were executed with normal error rates in PD-ON and -OFF stimulation. In contrast to these behavioral results, whether the corresponding prefrontal activation was differentially affected by deep brain stimulation status in patients depended on whether the WM modality was SP versus NSP. Thus, SP WM was associated with (1) abnormal reduction in dorsolateral prefrontal activity in PD-OFF and -ON stimulation and (2) abnormal overactivation in parieto-temporal cortex in PD-OFF and in limbic circuits in PD-ON stimulation. In NSP WM, normal activation of the ventral prefrontal cortex was restored in PD-ON stimulation. In both visual modalities the posterior cerebral regions including fusiform cortex and cerebellum, displayed abnormally reduced activity in PD. These results indicate that PD induces a prefrontal hypoactivation that STN stimulation can partially restore in a modality selective manner by additional recruitment of limbic structures in SP WM or by recovery of the ventral prefrontal activation in NSP WM. Hum Brain Mapp 35:552-566, 2014. © 2012 Wiley Periodicals, Inc.
Ramantani G.,University Hospital Freiburg |
Koessler L.,University of Lorraine |
Koessler L.,French National Center for Scientific Research |
Colnat-Coulbois S.,University of Lorraine |
And 11 more authors.
Epilepsia | Year: 2013
Purpose: To define the relationship between the epileptogenic zone and the polymicrogyric area using intracranial electroencephalography (EEG) recordings in patients with structural epilepsy associated with regional infrasylvian polymicrogyria (PMG). Methods: We retrospectively reviewed the medical charts, scalp, and intracranial video-EEG recordings, neuroimaging findings, and neuropsychological evaluations of four patients with refractory temporal lobe epilepsy related to PMG who consequently underwent resective surgery. Key Findings: High-resolution magnetic resonance imaging (MRI) revealed temporal lobe PMG in all cases, accompanied by hippocampal malrotation and closed lip schizencephaly in 3/4 cases, respectively. In intracranial recordings, interictal spike activity was localized within the PMG in only 2/4 and within the amygdala, hippocampus, and entorhinal cortex in all cases. In the first patient, two epileptogenic networks coexisted: the prevailing network initially involved the mesial temporal structures with spread to the anterior PMG; the secondary network successively involved the anterior part of the PMG and later the mesial temporal structures. In the second patient, the epileptogenic network was limited to the mesial temporal structures, fully sparing the PMG. In the third patient, the epileptogenic network first involved the mesial temporal structures and later the PMG. Conversely, in the last case, part of the PMG harbored an epileptogenic network that propagated to the mesial temporal structures. Consistent with these findings a favorable outcome (Engel class I in three of four patients; Engel class II in one of four) at last follow-up was obtained by a resection involving parts of the PMG cortex in three of four and anteromesial temporal lobe structures in another three of four cases. Significance: Infrasylvian PMG displays a heterogeneous epileptogenicity and is occasionally and partially involved in the epileptogenic zone that commonly includes the mesial temporal structures. Our results highlight the intricate interrelations between the MRI-detectable lesion and the epileptogenic zone as delineated by intracranial recordings. Seizure freedom can be accomplished as a result of a meticulous intracranial study guiding a tailored resection that may spare part of the PMG. © Wiley Periodicals, Inc. © 2012 International League Against Epilepsy.
Boyle H.J.,Center Leon Berard |
Jouanneau E.,Pierre Wertheimer Neurological Hospital |
Droz J.P.,Center Leon Berard |
Flechon A.,Center Leon Berard
Oncology (Switzerland) | Year: 2013
Background: Brain metastases from germ cell tumors (GCT) are rare and treatment has not yet been standardized. Methods: The clinical data of men with brain metastases from GCT treated in a single cancer hospital from January 1993 to September 2007 were reviewed. Patients with primary central nervous system GCT were excluded. Results: Thirteen patients had brain metastases at initial diagnosis. All patients received cisplatin-based chemotherapy. Three also received radiotherapy and 1 underwent surgery. Eight of the patients died. Median survival was 19 months (95% CI 0.84-not reached). Twenty-two patients developed brain metastases at recurrence. Median time from initial diagnosis to brain metastases was 8.25 months (3-17.5 months). Five patients received radiotherapy alone, 3 received chemotherapy alone and 3 received supportive care only. Nine patients were operated on: 6 received postoperative chemotherapy and 1 received postoperative radiotherapy. Only 1 patient is still alive. Median survival was 5.1 months (95% CI: 2.2-10.5 months). Conclusions: Patients with GCT who present with brain metastases at diagnosis tend to do better than patients who develop them at relapse. Chemotherapy can be adequate treatment for initial brain metastases. Treatment for patients with brain metastases at relapse is still not optimal. Copyright © 2013 S. Karger AG, Basel.