Research Topics
| Alain PtitoSummaryAffiliation: McGill University Country: Canada Publications
| Collaborators
|
Detail Information
Publications
Contributions of functional magnetic resonance imaging (fMRI) to sport concussion evaluationAlain Ptito
Montreal Neurological Institute McGill University, Montreal, Quebec, Canada
NeuroRehabilitation 22:217-27. 2007..Our existing and ongoing fMRI studies will be described as examples to highlight the potential and contribution of this non-invasive functional neuroimaging technique in the assessment of sports-related concussion and its management...- Neural substrates of blindsight after hemispherectomyAlain Ptito
Cognitive Neuroscience Unit, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
Neuroscientist 13:506-18. 2007..The following article is a review of their research on the involvement of the superior colliculi in blindsight in hemispherectomized patients. ... - Blindsight mediated by an S-cone-independent collicular pathway: an fMRI study in hemispherectomized subjectsSandra E Leh
McGill University, Canada
J Cogn Neurosci 22:670-82. 2010..We conclude that the human superior colliculus is blind to the S-cone-isolating stimuli, and blindsight is mediated by an S-cone-independent collicular pathway... - Superior colliculi involvement in poststroke unilateral spatial neglect: a pilot studyTatiana Ogourtsova
School of Physical and Occupational Therapy, McGill University, Montreal, Quebec, Canada
Top Stroke Rehabil 18:770-85. 2011..We determined the feasibility of investigating SC contribution to poststroke USN using the SSE in 3 groups... - Electrophysiology and functional MRI in post-acute mild traumatic brain injuryNadia Gosselin
Cognitive Neuroscience Unit, Montreal Neurological Institute and Hospital, Montreal, Canada
J Neurotrauma 28:329-41. 2011..ERP reveals decreased amplitude of the N350 component, while fMRI demonstrates that the more severe the symptoms, the lower the BOLD signal changes in the mid-DLPFC... - Recovery from mild head injury in sports: evidence from serial functional magnetic resonance imaging studies in male athletesJen Kai Chen
Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
Clin J Sport Med 18:241-7. 2008..To examine functional brain activation patterns before and after postconcussive symptoms (PCS) resolution... - Neural substrates of symptoms of depression following concussion in male athletes with persisting postconcussion symptomsJen Kai Chen
Montreal Neurological Institute, McGill University, Montreal, QC H3A 2B4, Canada
Arch Gen Psychiatry 65:81-9. 2008..Depressed mood is frequently reported by individuals who have sustained cerebral concussion but little is known about the nature of this alteration in mood state... - Theta burst stimulation-induced inhibition of dorsolateral prefrontal cortex reveals hemispheric asymmetry in striatal dopamine release during a set-shifting task: a TMS-[(11)C]raclopride PET studyJi H Ko
Montreal Neurological Institute, McGill University, Montreal, QC, Canada
Eur J Neurosci 28:2147-55. 2008.... - A validation of the post concussion symptom scale in the assessment of complex concussion using cognitive testing and functional MRIJen Kai Chen
Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
J Neurol Neurosurg Psychiatry 78:1231-8. 2007..Clinical assessment of cerebral concussion relies on the presence and duration of post concussive symptoms (PCS). Given that these PCS are subjective reports and not always specific to concussion, their usefulness remains to be validated... - Retrosplenial and hippocampal brain regions in human navigation: complementary functional contributions to the formation and use of cognitive mapsGiuseppe Iaria
Montreal Neurological Institute, McGill University, 3801 University Street, Montreal, Quebec, Canada, H3A 2B4
Eur J Neurosci 25:890-9. 2007.... - Absence of S-cone input in human blindsight following hemispherectomySandra E Leh
Neuropsychology Cognitive Neuroscience Unit, Montreal Neurological Institute, 3801 University Street, Montreal, Quebec, Canada H3A 2B4
Eur J Neurosci 24:2954-60. 2006..A direct retino-pulvinar-cortical connection is also unlikely as the pulvinar nucleus is known to receive input from S-cones as well as from L/M-cone-driven colour-opponent ganglion cells... - Brain functions after sports-related concussion: insights from event-related potentials and functional MRINadia Gosselin
Cognitive Neuroscience Unit, Montreal Neurological Institute, Montreal, Quebec, Canada
Phys Sportsmed 38:27-37. 2010.... - Unconscious vision: new insights into the neuronal correlate of blindsight using diffusion tractographySandra E Leh
Cognitive Neuroscience Unit, Montreal Neurological Institute and Hospital, McGill University Montreal, Canada
Brain 129:1822-32. 2006..In contrast, no projections from the SC on the hemispherectomized side were observed in hemispherectomized subjects without blindsight, in support of a key role of this structure in 'Type-I' or 'attention blindsight'... - Fronto-striatal connections in the human brain: a probabilistic diffusion tractography studySandra E Leh
Montreal Neurological Institute and Hospital, McGill University, Montreal, QC, Canada
Neurosci Lett 419:113-8. 2007..Identifying the anatomical organization of the fronto-striatal network has important implications for understanding basal ganglia function and associated disease processes... - Absence of cognitive deficits following deep brain stimulation of the subthalamic nucleus for the treatment of Parkinson's diseaseMaria Fraraccio
Division of Cognitive Neuroscience, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
Arch Clin Neuropsychol 23:399-408. 2008..We conclude that electrical stimulation of the motor subthalamic nucleus does not cause appreciable declines in cognitive function in well-selected patients... - Independence in managing one's finances after traumatic brain injuryCarolina Bottari
Occupational Therapy Program, School of Rehabilitation, Universit de Montr al, Montreal, Canada
Brain Inj 25:1306-17. 2011..Conclusions: The budgeting task of the IADL Profile discriminates TBI subjects from controls. Planning was shown to be the most significant difficulty underlying reduced independence in the task... - Contribution of the superior colliculi to post-stroke unilateral spatial neglect and recoveryTatiana Ogourtsova
Faculty of Medicine, School of Physical and Occupational Therapy, McGill University, 3630 Promenades Sir William Osler, Montreal, Quebec H3G 1Y5, Canada
Neuropsychologia 48:2407-16. 2010..Further exploration of the mechanisms involved and their impact on USN in human subjects will help develop theoretically based intervention strategies tailored to USN type... - Superior colliculi involvement in poststroke unilateral spatial neglect: a pilot studyTatiana Ogourtsova
School of Physical and Occupational Therapy, McGill University, Montreal, Quebec
Top Stroke Rehabil 18:770-85. 2011..These fi ndings suggest avenues for research that may lead to novel rehabilitation interventions... - Alterations in right posterior hippocampus in early blind individualsDaniel Robert Chebat
Harland Sanders Research Chair, School of Optometry, University of Montreal, Montreal, Canada
Neuroreport 18:329-33. 2007.... - Patterns of cortical thickness and surface area in early Parkinson's diseaseThomas Jubault
Unité de Neuroimagerie Fonctionelle, Institut Universitaire de Geriatrie de Montreal, Montreal, QC, Canada
Neuroimage 55:462-7. 2011..In the future, MRI-generated corticometry, combined with additional behavioral markers, may prove to be a useful diagnosis tool to characterize the evolution of motor and cognitive deficits in PD... - Current concepts in concussion rehabilitationKaren M Johnston
Concussion Program, McGill Sport Medicine Centre, 475 Pine Avenue West, Montreal, Quebec, H2W 1S4, Canada
Curr Sports Med Rep 3:316-23. 2004..In this article we introduce the largely unexplored concept of multidimensional concussion rehabilitation and discuss physical, psychologic, social, and sport-specific issues. As well, we propose future directions in this field... - Mood stability during acute stimulator challenge in Parkinson's disease patients under long-term treatment with subthalamic deep brain stimulationAlexandre Berney
Department of Psychiatry, McGill University, Montreal, Canada
Mov Disord 22:1093-6. 2007..Acute stimulator challenge in long-term STN-DBS-treated PD patients does not appear to provoke clinically relevant mood effects... - Deficits in complex visual information processing after mild TBI: electrophysiological markers and vocational outcome prognosisJulie Lachapelle
Department of Neurology Neurosurgery, McGill University, Montreal, Quebec, Canada
Brain Inj 22:265-74. 2008..To evaluate low-level to complex information processing using visual electrophysiology and to examine the latter's prognostic value in regards to vocational outcome in persons having sustained a mild traumatic brain injury (mTBI)... - Cortical areas mediating stereopsis in the human brain: a PET studyAudrey Fortin
, , CP 6128, Succursale Centre-Ville,
Neuroreport 13:895-8. 2002.... - Texture segregation in traumatic brain injury--a VEP studyJulie Lachapelle
, , 2275 Laurier Avenue East, , Qu, Canada H2H 2N8
Vision Res 44:2835-42. 2004..It could also help quantify cortical damage that is not revealed with more standard clinical tools... - Pantomime to visual presentation of objects: left hand dyspraxia in patients with complete callosotomyHedda Lausberg
Department of Neurology, Free University of Berlin, Germany
Brain 126:343-60. 2003.... - Split-brain patients neglect left personal space during right-handed gesturesHedda Lausberg
Department of Neurology, Free University of Berlin, Hindenburgdamm 30, D 12200, Berlin, Germany
Neuropsychologia 41:1317-29. 2003..Rather, the results provide support for theoretical models that consider the left hemisphere as specialised for processing the right half of space during the execution of descriptive gestures... - Error correction strategies for motor behavior after unilateral brain damage: short-term motor learning processesNuma Dancause
Physiology Department, Neurological Sciences Research Center, University of Montreal, Que, Canada
Neuropsychologia 40:1313-23. 2002..Taken together, these results imply that all hemiparetic individuals would not benefit equally from the same motor re-training approaches...