Alain Ptito

Summary

Affiliation: McGill University
Country: Canada

Publications

  1. ncbi request reprint Contributions of functional magnetic resonance imaging (fMRI) to sport concussion evaluation
    Alain Ptito
    Montreal Neurological Institute McGill University, Montreal, Quebec, Canada
    NeuroRehabilitation 22:217-27. 2007
  2. ncbi request reprint Neural substrates of blindsight after hemispherectomy
    Alain Ptito
    Cognitive Neuroscience Unit, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
    Neuroscientist 13:506-18. 2007
  3. doi request reprint The influence of pain on cerebral functioning after mild traumatic brain injury
    Nadia Gosselin
    Cognitive Neuroscience Unit, Montreal Neurological Institute and Hospital, Montreal, Quebec, Canada
    J Neurotrauma 29:2625-34. 2012
  4. doi request reprint Blindsight mediated by an S-cone-independent collicular pathway: an fMRI study in hemispherectomized subjects
    Sandra E Leh
    McGill University, Canada
    J Cogn Neurosci 22:670-82. 2010
  5. doi request reprint Superior colliculi involvement in poststroke unilateral spatial neglect: a pilot study
    Tatiana Ogourtsova
    School of Physical and Occupational Therapy, McGill University, Montreal, Quebec, Canada
    Top Stroke Rehabil 18:770-85. 2011
  6. doi request reprint Electrophysiology and functional MRI in post-acute mild traumatic brain injury
    Nadia Gosselin
    Cognitive Neuroscience Unit, Montreal Neurological Institute and Hospital, Montreal, Canada
    J Neurotrauma 28:329-41. 2011
  7. doi request reprint Recovery from mild head injury in sports: evidence from serial functional magnetic resonance imaging studies in male athletes
    Jen Kai Chen
    Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
    Clin J Sport Med 18:241-7. 2008
  8. doi request reprint Neural substrates of symptoms of depression following concussion in male athletes with persisting postconcussion symptoms
    Jen Kai Chen
    Montreal Neurological Institute, McGill University, Montreal, QC H3A 2B4, Canada
    Arch Gen Psychiatry 65:81-9. 2008
  9. pmc 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 study
    Ji H Ko
    Montreal Neurological Institute, McGill University, Montreal, QC, Canada
    Eur J Neurosci 28:2147-55. 2008
  10. doi request reprint Brain functions after sports-related concussion: insights from event-related potentials and functional MRI
    Nadia Gosselin
    Cognitive Neuroscience Unit, Montreal Neurological Institute, Montreal, Quebec, Canada
    Phys Sportsmed 38:27-37. 2010

Collaborators

Detail Information

Publications29

  1. ncbi request reprint Contributions of functional magnetic resonance imaging (fMRI) to sport concussion evaluation
    Alain 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...
  2. ncbi request reprint Neural substrates of blindsight after hemispherectomy
    Alain 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. ...
  3. doi request reprint The influence of pain on cerebral functioning after mild traumatic brain injury
    Nadia Gosselin
    Cognitive Neuroscience Unit, Montreal Neurological Institute and Hospital, Montreal, Quebec, Canada
    J Neurotrauma 29:2625-34. 2012
    ..Moreover, this study suggests that pain, cognition, and cerebral functioning interactions could not easily be generalized from one clinical population to another...
  4. doi request reprint Blindsight mediated by an S-cone-independent collicular pathway: an fMRI study in hemispherectomized subjects
    Sandra 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...
  5. doi request reprint Superior colliculi involvement in poststroke unilateral spatial neglect: a pilot study
    Tatiana 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...
  6. doi request reprint Electrophysiology and functional MRI in post-acute mild traumatic brain injury
    Nadia 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...
  7. doi request reprint Recovery from mild head injury in sports: evidence from serial functional magnetic resonance imaging studies in male athletes
    Jen 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...
  8. doi request reprint Neural substrates of symptoms of depression following concussion in male athletes with persisting postconcussion symptoms
    Jen 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...
  9. pmc 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 study
    Ji H Ko
    Montreal Neurological Institute, McGill University, Montreal, QC, Canada
    Eur J Neurosci 28:2147-55. 2008
    ....
  10. doi request reprint Brain functions after sports-related concussion: insights from event-related potentials and functional MRI
    Nadia Gosselin
    Cognitive Neuroscience Unit, Montreal Neurological Institute, Montreal, Quebec, Canada
    Phys Sportsmed 38:27-37. 2010
    ....
  11. ncbi request reprint Absence of S-cone input in human blindsight following hemispherectomy
    Sandra 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...
  12. pmc A validation of the post concussion symptom scale in the assessment of complex concussion using cognitive testing and functional MRI
    Jen 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...
  13. ncbi request reprint Retrosplenial and hippocampal brain regions in human navigation: complementary functional contributions to the formation and use of cognitive maps
    Giuseppe Iaria
    Montreal Neurological Institute, McGill University, 3801 University Street, Montreal, Quebec, Canada, H3A 2B4
    Eur J Neurosci 25:890-9. 2007
    ....
  14. doi request reprint Independence in managing one's finances after traumatic brain injury
    Carolina Bottari
    Occupational Therapy Program, School of Rehabilitation, Universite de Montreal, Montreal, Canada
    Brain Inj 25:1306-17. 2011
    ....
  15. doi request reprint Contribution of the superior colliculi to post-stroke unilateral spatial neglect and recovery
    Tatiana 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...
  16. ncbi request reprint Fronto-striatal connections in the human brain: a probabilistic diffusion tractography study
    Sandra 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...
  17. ncbi request reprint Unconscious vision: new insights into the neuronal correlate of blindsight using diffusion tractography
    Sandra 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'...
  18. doi request reprint Absence of cognitive deficits following deep brain stimulation of the subthalamic nucleus for the treatment of Parkinson's disease
    Maria 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...
  19. ncbi request reprint Superior colliculi involvement in poststroke unilateral spatial neglect: a pilot study
    Tatiana 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...
  20. ncbi request reprint Alterations in right posterior hippocampus in early blind individuals
    Daniel Robert Chebat
    Harland Sanders Research Chair, School of Optometry, University of Montreal, Montreal, Canada
    Neuroreport 18:329-33. 2007
    ....
  21. doi request reprint Patterns of cortical thickness and surface area in early Parkinson's disease
    Thomas 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...
  22. ncbi request reprint Current concepts in concussion rehabilitation
    Karen 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...
  23. ncbi request reprint Mood stability during acute stimulator challenge in Parkinson's disease patients under long-term treatment with subthalamic deep brain stimulation
    Alexandre 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...
  24. doi request reprint Deficits in complex visual information processing after mild TBI: electrophysiological markers and vocational outcome prognosis
    Julie 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)...
  25. ncbi request reprint Texture segregation in traumatic brain injury--a VEP study
    Julie Lachapelle
    Centre de recherche interdisciplinaire en readaptation, Site Centre de Réadaptation Lucie Bruneau, 2275 Laurier Avenue East, Montreal, Que, 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...
  26. ncbi request reprint Cortical areas mediating stereopsis in the human brain: a PET study
    Audrey Fortin
    Ecole d Optometrie, Universite de Montreal, CP 6128, Succursale Centre Ville, Montreal Quebec Canada H3C 3J7
    Neuroreport 13:895-8. 2002
    ....
  27. ncbi request reprint Split-brain patients neglect left personal space during right-handed gestures
    Hedda 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...
  28. ncbi request reprint Pantomime to visual presentation of objects: left hand dyspraxia in patients with complete callosotomy
    Hedda Lausberg
    Department of Neurology, Free University of Berlin, Germany
    Brain 126:343-60. 2003
    ....
  29. ncbi request reprint Error correction strategies for motor behavior after unilateral brain damage: short-term motor learning processes
    Numa 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...