Research Topics
| A SchniderSummaryAffiliation: University Hospital Country: Switzerland Publications
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Detail Information
Publications
What does recovery from anomia tell us about the underlying impairment: the case of similar anomic patterns and different recoveryMarina Laganaro
Service de Rééducation, Neuropsychologie, Hopitaux Universitaires de Geneve, Av Beau Séjour 26, CH 1211 Geneva 14, Switzerland
Neuropsychologia 44:534-45. 2006....- Reality confusion in spontaneous confabulationArmin Schnider
Division of Rehabilitation, Department of Clinical Neurosciences, University Hospital, Geneva, Switzerland
Neurology 65:1117-9. 2005..The findings support the theory that the defect causing spontaneous confabulation precedes conscious memory processing... - Selection of currently relevant words: an auditory verbal memory study using positron emission tomographyValerie Treyer
PET Center, Division of Nuclear Medicine, University Hospital, Zurich, Switzerland
Neuroreport 17:323-7. 2006..In this H2O positron emission tomography study, we demonstrate that this same organizing principle also applies to auditory verbal information, that is, to the processing of auditorily presented words... - Cortical and subcortical anatomy of chronic spatial neglect following vascular damageLaetitia Golay
Division of Neurorehabilitation, Geneva University Hospitals and University of Geneva, 1211 Geneva 14, Switzerland
Behav Brain Funct 4:43. 2008..abstract:.. - Spontaneous confabulation and the adaptation of thought to ongoing realityArmin Schnider
, , , CH-1211 Geneva 14, Switzerland
Nat Rev Neurosci 4:662-71. 2003 - Early cortical response to behaviorally relevant absence of anticipated outcomes: a human event-related potential studyArmin Schnider
Laboratory of Cognitive Neurorehabilitation, Division of Neurorehabilitation, University Hospital Geneva, Av de Beau Séjour 26, CH 1211 Geneva 14, Switzerland
Neuroimage 35:1348-55. 2007..The study indicates early, specific cortical processing of behaviorally relevant absence of predicted outcomes... - Absence of visual feedback abolishes expression of hemispatial neglect in self-guided spatial completionArmin Schnider
Division of Neurorehabilitation, University Hospitals of Geneva, 26, Av de Beau Séjour, CH 1211 Geneva 14, Switzerland
J Neurol Neurosurg Psychiatry 82:1279-82. 2011..Patients with left neglect direct their attention too strongly to the right. Hypotheses hold that this is due to a failure to disengage attention from right-sided stimuli or to a directional bias of attention into right space... - Early cortical distinction between memories that pertain to ongoing reality and memories that don'tArmin Schnider
Rehabilitation Clinic, Neurology Clinic, University Hospital, Geneva, Switzerland
Cereb Cortex 12:54-61. 2002..This sequence may also explain the ability to distinguish between the memory of a true event and the memory of a thought... - Spontaneous confabulation, reality monitoring, and the limbic system--a reviewA Schnider
Department of Rehabilitation, University Hospital, Av de Beau Séjour 26, CH 1211 14, Geneva, Switzerland
Brain Res Brain Res Rev 36:150-60. 2001..Comparison with animal studies suggests that human reality monitoring is a property of the brain's reward system... - The human orbitofrontal cortex monitors outcomes even when no reward is at stakeArmin Schnider
Department of Rehabilitation, University Hospital, CH 1211 Geneva 14, Switzerland
Neuropsychologia 43:316-23. 2005..The data indicate a generic role of the human OFC, with some topical specificity, in the generation of hypotheses and processing of outcomes, independent of the presence of explicit reward... - Dopaminergic modulation of rapid reality adaptation in thinkingA Schnider
Division of Neurorehabilitation, Department of Clinical Neurosciences, University Hospitals and University of Geneva, Geneva, Switzerland
Neuroscience 167:583-7. 2010..We conclude that dopaminergic transmission influences the ability to rapidly adapt thinking to ongoing reality... - Selection of currently relevant memories by the human posterior medial orbitofrontal cortexA Schnider
Clinique de Rééducation, University Hospital, Geneva, Switzerland
J Neurosci 20:5880-4. 2000..We suggest that this area is essential for sorting out mental associations that pertain to ongoing reality... - Recovery from spontaneous confabulations parallels recovery of temporal confusion in memoryA Schnider
Rehabilitation Clinic, University Hospital, Geneva, Switzerland
Neurology 55:74-83. 2000.... - Spontaneous confabulations, disorientation, and the processing of 'now'A Schnider
University Department of Neurology, Bern, Switzerland
Neuropsychologia 38:175-85. 2000..Although these results do not prove a causal relationship, they indicate that spontaneously confabulating and disorientated patients typically do fail to process information within the 'now'... - Spontaneous confabulators fail to suppress currently irrelevant memory tracesA Schnider
Department of Neurology, University Hospital, Bern, Switzerland
Nat Neurosci 2:677-81. 1999..We suggest that the anterior limbic system represents 'now' in human thinking by suppressing currently irrelevant mental associations... - Probabilistic contingency learning with limbic or prefrontal damageR Ptak
Clinique de Rééducation, Hĵpital Universitaire Genève, Switzerland
Behav Neurosci 115:993-1001. 2001..These results indicate that probabilistic learning does not depend on the brain structures supporting declarative memory... - Instinctive modulation of cognitive behavior: a human evoked potential studyLouis Nahum
Department of Clinical Neurosciences, Division of Neurorehabilitation, University Hospitals and University of Geneva, Switzerland
Hum Brain Mapp 30:2120-31. 2009..The study indicates rapid serial processing of innate emotional quality, then cognitive-behavioral relevance of stimuli, mediated by limbic and paralimbic structures... - Effects of baseline task position on apparent activation in functional imaging of memoryValerie Treyer
PET Center, Division of Nuclear Medicine, University Hospital, , Switzerland
Neuropsychologia 44:462-8. 2006..We suggest that the automatic filtration of memories according to their relevance for ongoing reality, a capacity mediated by the orbitofrontal cortex, is one such influence on apparent activation... - Rapid discrimination of visual and multisensory memories revealed by electrical neuroimagingMicah M Murray
The Functional Brain Mapping Laboratory, Neurology Clinic, University Hospital of Geneva, 1211, Geneva, Switzerland
Neuroimage 21:125-35. 2004.... - Disorientation, confabulation, and extinction capacity: clues on how the brain creates realityLouis Nahum
Division of Neurorehabilitation, Department of Clinical Neurosciences, University Hospital and University of Geneva, CH 1211 Geneva 14, Switzerland
Biol Psychiatry 65:966-72. 2009..In this study, we explored whether disorientation and behaviorally spontaneous confabulation are associated with extinction failure... - Electrophysiological correlates of different anomic patterns in comparison with normal word productionMarina Laganaro
Division of Neurorehabilitation, Geneva Hospital and University of Geneva, Geneva, Switzerland
Cortex 45:697-707. 2009..These results indicate that abnormal electro-cortical correlates of anomic profiles can be observed in different time-windows, which seem to correspond to the time course of the impaired encoding processes... - Neural transition from short- to long-term memory and the medial temporal lobe: a human evoked-potential studyClara James
Division of Neurorehabilitation, Department of Clinical Neurosciences, University Hospital and University of Geneva, Geneva, Switzerland
Hippocampus 19:371-8. 2009..Processing of novel information seems to immediately initiate a consolidation process, which remains vulnerable during active maintenance and increases its effectiveness during off-line processing... - Electrophysiological correlates of deficient encoding in a case of post-anoxic amnesiaSandra Lehmann
Division of Neurorehabilitation, Department of Clinical Neurosciences, University Hospital, CH 1211 Geneva 14, Switzerland
Neuropsychologia 45:1757-66. 2007..The present study suggests that the rapid activation of distributed cortical networks is critical for efficient encoding... - Receptive amusia: temporal auditory processing deficit in a professional musician following a left temporo-parietal lesionMarie Di Pietro
, , 26, , , Switzerland
Neuropsychologia 42:868-77. 2004..Rather, our findings suggest modality-specific encoding of musical temporal information. Besides, it is proposed that the processing of auditory rhythmic sequences involves a specific left hemispheric temporal buffer... - Abnormal cortical network activation in human amnesia: A high-resolution evoked potential studySandra Barcellona-Lehmann
Department of Clinical Neurosciences, University Hospitals and University of Geneva, Switzerland
Brain Topogr 23:72-81. 2010..The study indicates that cortical mechanisms underlying memory formation and re-activation in amnesia fundamentally differ from normal memory processing... - Hypothalamic amnesia with spontaneous confabulations: a clinicopathologic studyR Ptak
Department of Rehabilitation, University Hospital, Geneva, Switzerland
Neurology 56:1597-600. 2001..Isolated hypothalamic damage may produce the same type of memory disorder as orbitofrontal damage... - [Expansion of the sphere of crisis: the question of the intrusiveness of the disease]O Dufour
Departement de Psychiatrie, HUG, 1211 Geneve 14
Rev Med Suisse 6:347-52. 2010..This article addresses the high complexity of clinical situations handled in an environment of rehabilitation care with the support of the consultants, nurses and doctors, of the liaison psychiatry... - [Ischemic, an uncommon complication of Biermer disease (pernicious anemia)]B Leemann
Service de Rééducation, HUG, Switzerland
Rev Neurol (Paris) 162:1007-10. 2006..Stroke in a young adult justifies an extensive etiologic workup... - [Functional weakness of movement]B Leemann
Service de neurorééducation, Départment des neurosciences cliniques, HUG, 1211 Geneve 14
Rev Med Suisse 7:408-11. 2011..The long-term prognosis is bad. The treatment includes cognitive-behavioral therapy and rehabilitation to develop a positive attitude... - [Constraint-induced movement therapy in neurological rehabilitation: which modality to choose? Our experience in rehabilitation in Geneva]B Leemann
Service de neurorééducation, Hopitaux Universitaires de Geneve, 26, Avenue Beau Sejour, 1211 Geneve 14, Suisse
Ann Readapt Med Phys 51:31-7. 2008..CIMT consists of restraining the unaffected arm to limit its use, combined with a training program based on the shaping principle. We aimed to explore how this method can be used in practice by studying 4 patients after stroke... - Expectation-based attentional modulation of visual extinction in spatial neglectRadek Ptak
Clinique de Rééducation, Hopital Cantonal Universitaire, 26, Av de Beau Séjour, CH 1211 14, Geneva, Switzerland
Neuropsychologia 40:2199-205. 2002..These results suggest that competition for selection between visual stimuli may not only be influenced by perceptual characteristics of the display, but also by high-level factors such as the response criterion or expectation biases... - Looking left with left neglect: the role of spatial attention when active vision selects local image features for fixationRadek Ptak
Division of Neurorehabilitation, Department of Clinical Neurosciences, Geneva University Hospitals, Geneva, Switzerland Medical School, University of Geneva, Switzerland
Cortex 45:1156-66. 2009..These results suggest that intact spatial attention is necessary for the active sampling of local feature content during scene perception... - [Unusually favorable recovery from locked-in syndrome after basilar artery occlusion]Beatrice Leemann
Service de neurorééducation HUG, 1211 Geneve 14
Rev Med Suisse 6:633-5. 2010..We describe a case with remarkable recovery. After 2 years the patient was independent for daily living activities, walks independently and has comprehensible speech... - Effect of different walking aids on walking capacity of patients with poststroke hemiparesisLara Allet
Department of Clinical Neurosciences, Geneva University Hospitals and University of Geneva, Geneva, Switzerland
Arch Phys Med Rehabil 90:1408-13. 2009..To examine the effects of 3 different walking aids on walking capacity, temporo-spatial gait parameters, and patient satisfaction... - Bilateral impairment of concurrent saccade programming in hemispatial neglectRadek Ptak
Division of Neurorehabilitation, University Hospital Geneva, 1211 Geneva 14, Switzerland
Neuropsychologia 48:880-6. 2010..This pattern is consistent with a severe, bilateral impairment of concurrent saccade programming in left spatial neglect... - Neural response to the behaviorally relevant absence of anticipated outcomes and the presentation of potentially harmful stimuli: A human fMRI studyLouis Nahum
Laboratory of Cognitive Neurorehabilitation, Division of Neurorehabilitation, Department of Clinical Neurosciences, University Hospitals and University of Geneva, Switzerland
Cortex 47:191-201. 2011..By contrast, the absence of anticipated outcomes specifically activated the orbitofrontal cortex (OFC), irrespective of the iES of the outcome stimulus. The findings support a generic role of the OFC in outcome monitoring... - Crossover trial of subacute computerized aphasia therapy for anomia with the addition of either levodopa or placeboBeatrice Leemann
Service de neurorééducation, University Hospital of Geneva, Geneva, Switzerland
Neurorehabil Neural Repair 25:43-7. 2011..The effect of levodopa on recovery from aphasia is controversial... - The dorsal attention network mediates orienting toward behaviorally relevant stimuli in spatial neglectRadek Ptak
Division of Neurorehabilitation, Geneva University Hospitals, and Faculty of Medicine, University of Geneva, 1211 Geneva 14, Switzerland
J Neurosci 30:12557-65. 2010..These findings indicate that the dorsal attention network controls spatial orienting by modulating the saliency of distracter stimuli according to current action goals... - Early event-related cortical activity originating in the frontal eye fields and inferior parietal lobe predicts the occurrence of correct and error saccadesRadek Ptak
Division of Neurorehabilitation, Geneva University Hospitals, Geneva, Switzerland
Hum Brain Mapp 32:358-69. 2011..These findings suggest that selection of the saccade target in a conflicting situation is determined by early top-down biases originating in frontal and parietal cortical regions critical for spatial attention and saccade programming... - Dopamine inhibition and the adaptation of behavior to ongoing realityHans Pihan
Department of Neurology, Division of Neuropsychological Rehabilitation, University Hospital, Bern, Switzerland
Neuroreport 15:709-12. 2004..We present a patient who regained the ability to adapt thought and behavior to ongoing reality when treated with risperidone, a dopamine antagonist... - Disorganised memory after right dorsolateral prefrontal damageRadek Ptak
Service de Rééducation, HUG, Geneve, Switzerland
Neurocase 10:52-9. 2004..This case exemplifies that an isolated lesion of the right area 9/46 may induce severe failure to schedule actions and memory retrieval, a disorder leading to severely disorganised behaviour and disability... - Reflexive orienting in spatial neglect is biased towards behaviourally salient stimuliRadek Ptak
Division of Rehabilitation, University Hospital Geneva, 26 avenue de Beau Séjour, CH 1211 Geneva 14, Switzerland
Cereb Cortex 16:337-45. 2006..These results show that neglect patients only orient attention reflexively towards ipsilesional stimuli with high behavioural salience... - Dynamic modulation of visual detection by auditory cues in spatial neglectLaetitia Golay
Service de Rééducation, HUG, 26 av de Beau Séjour, 1211 Geneve 14, Switzerland
Neuropsychologia 43:1258-65. 2005..These results demonstrate a fast automatic shift of spatial attention in the direction of a moving tone, suggesting strong dynamic links between visual and auditory attention in patients with a severe spatial deficit... - Computerised treatment of anomia in acute aphasia: treatment intensity and training sizeMarina Laganaro
Service de Rééducation, University Hospital, Geneva, Switzerland
Neuropsychol Rehabil 16:630-40. 2006..The integration of these results within the framework of studies on intensity is discussed... - A non-spatial bias favouring fixated stimuli revealed in patients with spatial neglectRadek Ptak
Division of Neurorehabilitation, University Hospital Geneva, 1211 Geneva 14, Switzerland
Brain 130:3211-22. 2007..We conclude that impaired initiation of saccades in any direction contributes to the deficits of spatial exploration that characterize spatial neglect... - Normalisation and increase of abnormal ERP patterns accompany recovery from aphasia in the post-acute stageMarina Laganaro
Laboratory of Cognitive Rehabilitation, Division of Rehabilitation, Geneva University Hospital and University of Geneva, Switzerland
Neuropsychologia 46:2265-73. 2008.... - Time estimation in Parkinson's disease: normal long duration estimation despite impaired short duration discriminationJ M Riesen
University Department of Neurology, Inselspital Bern, and Rehabilitation Clinic University Hospital, Geneva, Switzerland
J Neurol 248:27-35. 2001..We suggest that time estimation, i. e. the feeling for the flow of time, is normal in PD patients despite impaired discrimination of brief intervals in the range of seconds... - Peripheral dysgraphia characterized by the co-occurrence of case substitutions in uppercase and letter substitutions in lowercase writingM Di Pietro
Division of Neurorehabilitation, Department of Clinical Neurosciences, University Hospitals and University of Geneva, Switzerland
Cortex 47:1038-51. 2011.... - Processing content or location: distinct brain activation in a memory taskValerie Treyer
PET Center, Division of Nuclear Medicine, University Hospital, Zurich, Switzerland
Hippocampus 15:684-9. 2005..These data demonstrate distinct contributions of the left and right MTL to the processing of "what" vs. "where" in memory... - Mechanism of disorientation in Alzheimer's diseaseSabine Joray
Memory Clinic, Department of Geriatrics, Geneva University Hospitals, Geneva, Switzerland
Eur Neurol 52:193-7. 2004..This finding is compatible with the different distribution of degeneration in AD and the orbitofrontal damage typically present in severely disoriented amnesics... - Neutral functional realignment orthosis prevents hand pain in patients with subacute stroke: a randomized trialElisabeth Bürge
Haute école de santé Geneva, HES SO University of Applied Sciences Western Switzerland, Geneva, Switzerland
Arch Phys Med Rehabil 89:1857-62. 2008..To quantify the preventive effect of a neutral functional realignment orthosis on pain, mobility, and edema of the hand in subacute hemiparetic poststroke patients with severe motor deficits... - Paradoxical switching to a barely-mastered second language by an aphasic patientB Leemann
Division for Rehabilitation, Geneva University Hospitals, Geneva, Switzerland
Neurocase 13:209-13. 2007..We concluded, in line with previous reports, that our case used his metalinguistic knowledge to compensate for his inability to access his linguistic skills... - Masseter muscle thickness in hospitalised stroke patientsM Schimmel
Division of Gerodontology and Removable Prosthodontics, University of Geneva, Geneva, Switzerland
J Oral Rehabil 37:726-30. 2010..This asymmetric stimulation of the masticatory muscles may have caused this difference in the masseter muscle bulk... - Dissociated active and passive tactile shape recognition: a case study of pure tactile apraxiaN Valenza
Clinique de Rééducation, Hopitaux Universitaires de Geneve, Geneve, Switzerland
Brain 124:2287-98. 2001..We interpret the deficit of our patient as a pure tactile apraxia without tactile agnosia, i.e. a specific inability to use tactile feedback to generate the exploratory procedures necessary for tactile shape recognition... - Defective spatial imagery with pure Gerstmann's syndromeAntonio Carota
Service de Rééducation, Hopitaux Universitaires de Geneve, Geneva, Switzerland
Eur Neurol 52:1-6. 2004..We hypothesize that, in this case, the main cognitive denominator of Gerstmann's tetrad was a severe dysfunction in mental rotation and translation. This report provides further evidence for the spatial nature of Gerstmann's syndrome... - Subcortical loop activation during selection of currently relevant memoriesValerie Treyer
University Hospital,
J Cogn Neurosci 15:610-8. 2003..The data are compatible with a role of the dopaminergic reward system in the monitoring of ongoing reality in thinking... - Functional magnetic resonance imaging and diffusion tensor imaging in a case of central poststroke painMohamed L Seghier
Department of Radiology, University of Hospital of Geneva, Switzerland
J Pain 6:208-12. 2005..Our investigations show, for CPSP pathogenesis, the role of damage of lateral nociceptive thalamoparietal fibers together with the release of activity of anterior cingulate and posterior parietal regions... - Dramatic recovery from prolonged Wernicke-Korsakoff diseaseAntonio Carota
, , , Suisse
Eur Neurol 53:45-6. 2005 - A technique to train new oculomotor behavior in patients with central macular scotomas during reading related tasks using scanning laser ophthalmoscopy: immediate functional benefits and gains retentionAnouk Déruaz
Ophthalmology Clinic, Department of Clinical Neurosciences and Dermatology, Geneva University Hospitals, Switzerland
BMC Ophthalmol 6:35. 2006..We use an additional fixation point which, when combined with the initial PRL, allows the fulfillment of both letter resolution and global viewing of words...