Sherif Karama

Summary

Affiliation: McGill University
Country: Canada

Publications

  1. pmc Film excerpts shown to specifically elicit various affects lead to overlapping activation foci in a large set of symmetrical brain regions in males
    Sherif Karama
    McConnell Brain Imaging Center, Montreal Neurological Institute, McGill University, Montreal, Canada
    PLoS ONE 6:e22343. 2011
  2. pmc Dopamine transporter 3'UTR VNTR genotype is a marker of performance on executive function tasks in children with ADHD
    Sherif Karama
    Department of Psychiatry, McGill University, Montreal, Canada
    BMC Psychiatry 8:45. 2008
  3. pmc Cortical thickness correlates of specific cognitive performance accounted for by the general factor of intelligence in healthy children aged 6 to 18
    Sherif Karama
    McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, QC, Canada
    Neuroimage 55:1443-53. 2011
  4. doi Factor structure of the restricted academic situation scale: implications for ADHD
    Sherif Karama
    Department of Psychiatry, McGill University, Douglas Hospital Research Centre, Montreal, Canada
    J Atten Disord 12:442-8. 2009
  5. pmc Interactive effects of dehydroepiandrosterone and testosterone on cortical thickness during early brain development
    Tuong Vi Nguyen
    McConnell Brain Imaging Center, Montreal Neurological Institute, McGill University, Montreal, Quebec H3A 2B4, Canada
    J Neurosci 33:10840-8. 2013
  6. pmc Anxious/depressed symptoms are linked to right ventromedial prefrontal cortical thickness maturation in healthy children and young adults
    Simon Ducharme
    McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, QC H3A 2B4, Canada
    Cereb Cortex 24:2941-50. 2014
  7. pmc Testosterone-related cortical maturation across childhood and adolescence
    Tuong Vi Nguyen
    McConnell Brain Imaging Center, Montreal Neurological Institute, Montreal, Quebec, Canada H3A 2B4
    Cereb Cortex 23:1424-32. 2013
  8. pmc Decreased regional cortical thickness and thinning rate are associated with inattention symptoms in healthy children
    Simon Ducharme
    McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Canada
    J Am Acad Child Adolesc Psychiatry 51:18-27.e2. 2012
  9. pmc Negative associations between corpus callosum midsagittal area and IQ in a representative sample of healthy children and adolescents
    Hooman Ganjavi
    Department of Psychiatry, McGill University, Montreal, Quebec, Canada
    PLoS ONE 6:e19698. 2011
  10. doi Trajectories of cortical thickness maturation in normal brain development - The importance of quality control procedures
    Simon Ducharme
    Montreal Neurological Institute, McConnell Brain Imaging Centre, McGill University, 3801 University Street, Montreal, QC H3A 2B4, Canada McGill University Health Centre, Department of Psychiatry, McGill University, 1025 Pine Avenue West, Montreal, QC H3A 1A1, Canada Electronic address
    Neuroimage 125:267-79. 2016

Collaborators

Detail Information

Publications21

  1. pmc Film excerpts shown to specifically elicit various affects lead to overlapping activation foci in a large set of symmetrical brain regions in males
    Sherif Karama
    McConnell Brain Imaging Center, Montreal Neurological Institute, McGill University, Montreal, Canada
    PLoS ONE 6:e22343. 2011
    ..This study clearly confirms for the visual modality, that processing emotional stimuli leads to widespread increases in activation that cluster within relatively confined areas, regardless of valence...
  2. pmc Dopamine transporter 3'UTR VNTR genotype is a marker of performance on executive function tasks in children with ADHD
    Sherif Karama
    Department of Psychiatry, McGill University, Montreal, Canada
    BMC Psychiatry 8:45. 2008
    ..Executive function deficits are considered among the most important pathogenic pathways leading to ADHD and may index part of the heterogeneity in this disorder...
  3. pmc Cortical thickness correlates of specific cognitive performance accounted for by the general factor of intelligence in healthy children aged 6 to 18
    Sherif Karama
    McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, QC, Canada
    Neuroimage 55:1443-53. 2011
    ..Within a psychometric framework, cortical thickness correlates of cognitive performance on complex tasks are well captured by g in this demographically representative sample...
  4. doi Factor structure of the restricted academic situation scale: implications for ADHD
    Sherif Karama
    Department of Psychiatry, McGill University, Douglas Hospital Research Centre, Montreal, Canada
    J Atten Disord 12:442-8. 2009
    ..25 mg/kg of methylphenidate. Placebo and methylphenidate were each administered according to a double-blind placebo-controlled crossover design...
  5. pmc Interactive effects of dehydroepiandrosterone and testosterone on cortical thickness during early brain development
    Tuong Vi Nguyen
    McConnell Brain Imaging Center, Montreal Neurological Institute, McGill University, Montreal, Quebec H3A 2B4, Canada
    J Neurosci 33:10840-8. 2013
    ....
  6. pmc Anxious/depressed symptoms are linked to right ventromedial prefrontal cortical thickness maturation in healthy children and young adults
    Simon Ducharme
    McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, QC H3A 2B4, Canada
    Cereb Cortex 24:2941-50. 2014
    ..Potential neurobiological mechanisms underlying this maturation pattern are proposed. These results demonstrate the dynamic impact of age on relations between vmPFC and negative affect in the developing brain. ..
  7. pmc Testosterone-related cortical maturation across childhood and adolescence
    Tuong Vi Nguyen
    McConnell Brain Imaging Center, Montreal Neurological Institute, Montreal, Quebec, Canada H3A 2B4
    Cereb Cortex 23:1424-32. 2013
    ..These findings show the association between testosterone and CTh to be complex, highly dynamic, and to vary, depending on sex and age; they also suggest sex-related hemispheric lateralization effects of testosterone in humans...
  8. pmc Decreased regional cortical thickness and thinning rate are associated with inattention symptoms in healthy children
    Simon Ducharme
    McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Canada
    J Am Acad Child Adolesc Psychiatry 51:18-27.e2. 2012
    ..However, the relationship between cortical maturation and attention capacities in typically developing children is unknown. This study examines cortical thickness correlates of inattention symptoms in a large sample of healthy children...
  9. pmc Negative associations between corpus callosum midsagittal area and IQ in a representative sample of healthy children and adolescents
    Hooman Ganjavi
    Department of Psychiatry, McGill University, Montreal, Quebec, Canada
    PLoS ONE 6:e19698. 2011
    ..These findings suggest that the correlation between CC midsagittal area and IQ may be related to age and gender...
  10. doi Trajectories of cortical thickness maturation in normal brain development - The importance of quality control procedures
    Simon Ducharme
    Montreal Neurological Institute, McConnell Brain Imaging Centre, McGill University, 3801 University Street, Montreal, QC H3A 2B4, Canada McGill University Health Centre, Department of Psychiatry, McGill University, 1025 Pine Avenue West, Montreal, QC H3A 1A1, Canada Electronic address
    Neuroimage 125:267-79. 2016
    ..This study further supports the crucial importance of implementing post-processing QC in CTh studies of development, aging, and neuropsychiatric disorders. ..
  11. pmc Right anterior cingulate cortical thickness and bilateral striatal volume correlate with child behavior checklist aggressive behavior scores in healthy children
    Simon Ducharme
    McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, 3801 University Street, Montreal, Quebec, Canada
    Biol Psychiatry 70:283-90. 2011
    ..The anterior cingulate cortex (ACC), orbitofrontal cortex (OFC), and basal ganglia have been implicated in pathological aggression. This study aimed at identifying neuroanatomical correlates of impulsive aggression in healthy children...
  12. doi Cortical Structural Connectivity Alterations in Primary Insomnia: Insights from MRI-Based Morphometric Correlation Analysis
    Lu Zhao
    McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, QC, Canada H3A 2B4
    Biomed Res Int 2015:817595. 2015
    ..Our findings support previous functional neuroimaging studies and provide novel insights into variations in brain network configuration that may be involved in the pathophysiology of insomnia. ..
  13. ncbi Dopamine transporter 3'-UTR VNTR genotype and ADHD: a pharmaco-behavioural genetic study with methylphenidate
    Ridha Joober
    Department of Psychiatry, McGill University and Douglas Hospital Research Centre, Montreal, QC, Canada
    Neuropsychopharmacology 32:1370-6. 2007
    ..They also suggest the presence of genetic heterogeneity that could be indexed by the quality of behavioral response to MPH...
  14. doi Structural insights into aberrant cortical morphometry and network organization in psychogenic erectile dysfunction
    Lu Zhao
    McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
    Hum Brain Mapp 36:4469-82. 2015
    ..This work provides structural insights on the complex phenomenon of psychogenic sexual dysfunction in men, and suggests a specific vulnerability factor, possibly as an extra "organic" factor, that may play an important role in pED...
  15. doi Neuroanatomical correlates of behavioral rating versus performance measures of working memory in typically developing children and adolescents
    Nazlie Faridi
    Department of Psychiatry, McGill University
    Neuropsychology 29:82-91. 2015
    ..This study was conducted to investigate sources of this discrepancy through correlation of volumetric and cortical thickness (CT) neuroimaging values with performance and questionnaire measures of working memory (WM)...
  16. pmc Developmental changes in organization of structural brain networks
    Budhachandra S Khundrakpam
    McConnell Brain Imaging Center, Montreal Neurological Institute, McGill University, Montreal, QC H3A 2B4, Canada
    Cereb Cortex 23:2072-85. 2013
    ..Our finding reveals a time window of plasticity occurring during late childhood which may accommodate crucial changes during puberty and the new developmental tasks that an adolescent faces. ..
  17. doi Positional and surface area asymmetry of the human cerebral cortex
    Oliver C Lyttelton
    Department of Biomedical Engineering, McGill University, Montreal, Canada
    Neuroimage 46:895-903. 2009
    ..By clearly separating out the effects of structural translocation and surface area change from those of thickness and curvature, this study resolves the confound of these variables inherent in VBM studies...
  18. doi 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...
  19. ncbi Increased striatal gray matter densities in patients with schizophrenia and substance use disorder: a voxel-based morphometry study
    Stephane Potvin
    Department of Psychiatry, Fernand Seguin Research Center, University of Montreal, Canada
    Psychiatry Res 154:275-9. 2007
    ..Increased striatal GMD were found in patients with schizophrenia and substance use disorder (n=12), but not schizophrenia only patients (n=11), compared to healthy volunteers (n=15)...
  20. doi A new template to study callosal growth shows specific growth in anterior and posterior regions of the corpus callosum in early childhood
    Jennyfer Ansado
    Ste Justine Hospital Research Center, Montreal, QC, Canada
    Eur J Neurosci 42:1675-84. 2015
    ..As shown by differences between 2D estimations and actual 3D measurements of callosal growth, our study highlights the importance of considering the horizontal width in measuring developmental changes in the CC...
  21. pmc Heritable changes in regional cortical thickness with age
    Francois Chouinard-Decorte
    McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, QC, H3A 2B4, Canada
    Brain Imaging Behav 8:208-16. 2014
    ..This suggests that different genetic factors account for cortical thickness heritability at different ages in these regions. ..