Omar A Gharbawie

Summary

Affiliation: Vanderbilt University
Country: USA

Publications

  1. pmc Multiple parietal-frontal pathways mediate grasping in macaque monkeys
    Omar A Gharbawie
    Department of Psychology, Vanderbilt University, Nashville, Tennessee 37203, USA
    J Neurosci 31:11660-77. 2011
  2. pmc Cortical connections of functional zones in posterior parietal cortex and frontal cortex motor regions in new world monkeys
    Omar A Gharbawie
    Department of Psychology, Vanderbilt University, 301 Wilson Hall, 111 21st Avenue South, Nashville, TN 37203, USA
    Cereb Cortex 21:1981-2002. 2011
  3. pmc Thalamocortical connections of functional zones in posterior parietal cortex and frontal cortex motor regions in New World monkeys
    Omar A Gharbawie
    Psychology Department, Vanderbilt University, Nashville, TN 37203, USA
    Cereb Cortex 20:2391-410. 2010
  4. ncbi request reprint Recovery of skilled reaching following motor cortex stroke: do residual corticofugal fibers mediate compensatory recovery?
    Omar A Gharbawie
    Department of Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Drive, Lethbridge, AB, T1K 3M4, Canada
    Eur J Neurosci 26:3309-27. 2007
  5. ncbi request reprint Cortical neuron response properties are related to lesion extent and behavioral recovery after sensory loss from spinal cord injury in monkeys
    Hui Xin Qi
    Department of Psychology, Vanderbilt University, Nashville, Tennessee 37240
    J Neurosci 34:4345-63. 2014
  6. pmc Impairment and recovery of hand use after unilateral section of the dorsal columns of the spinal cord in squirrel monkeys
    Hui Xin Qi
    Department of Psychology, Vanderbilt University, Nashville, TN 37240, USA
    Behav Brain Res 252:363-76. 2013
  7. pmc Optical imaging in galagos reveals parietal-frontal circuits underlying motor behavior
    Iwona Stepniewska
    Department of Psychology, Vanderbilt University, Nashville, TN 37203, USA
    Proc Natl Acad Sci U S A 108:E725-32. 2011
  8. doi request reprint Transient middle cerebral artery occlusion disrupts the forelimb movement representations of rat motor cortex
    Omar A Gharbawie
    Department of Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, Lethbridge, Alberta, Canada
    Eur J Neurosci 28:951-63. 2008
  9. ncbi request reprint Attempt-dependent decrease in skilled reaching characterizes the acute postsurgical period following a forelimb motor cortex lesion: an experimental demonstration of learned nonuse in the rat
    Crystal A Erickson
    Department of Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Drive, Lethbridge, Alta T1K 3M4, Canada
    Behav Brain Res 179:208-18. 2007
  10. ncbi request reprint Skilled reaching impairments from the lateral frontal cortex component of middle cerebral artery stroke: a qualitative and quantitative comparison to focal motor cortex lesions in rats
    Omar A Gharbawie
    Department of Psychology and Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Dr, Lethbridge, AB, Canada T1K 3M4
    Behav Brain Res 156:125-37. 2005

Collaborators

Detail Information

Publications24

  1. pmc Multiple parietal-frontal pathways mediate grasping in macaque monkeys
    Omar A Gharbawie
    Department of Psychology, Vanderbilt University, Nashville, Tennessee 37203, USA
    J Neurosci 31:11660-77. 2011
    ..Direct and indirect connections between those parietal-frontal pathways likely coordinate their respective functions into an accurate grasp...
  2. pmc Cortical connections of functional zones in posterior parietal cortex and frontal cortex motor regions in new world monkeys
    Omar A Gharbawie
    Department of Psychology, Vanderbilt University, 301 Wilson Hall, 111 21st Avenue South, Nashville, TN 37203, USA
    Cereb Cortex 21:1981-2002. 2011
    ..Additional weak interlinks between dissimilar zones (e.g., PPC reach and PPC grasp) were apparent and may coordinate actions...
  3. pmc Thalamocortical connections of functional zones in posterior parietal cortex and frontal cortex motor regions in New World monkeys
    Omar A Gharbawie
    Psychology Department, Vanderbilt University, Nashville, TN 37203, USA
    Cereb Cortex 20:2391-410. 2010
    ..PPC connections with VL and VP provide links to cerebellar nuclei and the somatosensory system, respectively, that may integrate PPC functions with M1/PM...
  4. ncbi request reprint Recovery of skilled reaching following motor cortex stroke: do residual corticofugal fibers mediate compensatory recovery?
    Omar A Gharbawie
    Department of Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Drive, Lethbridge, AB, T1K 3M4, Canada
    Eur J Neurosci 26:3309-27. 2007
    ..The results are discussed in relation to the idea that the involvement of the neocortical areas in skilled reaching performance and its recovery is proportional to the region from which corticospinal projections originate...
  5. ncbi request reprint Cortical neuron response properties are related to lesion extent and behavioral recovery after sensory loss from spinal cord injury in monkeys
    Hui Xin Qi
    Department of Psychology, Vanderbilt University, Nashville, Tennessee 37240
    J Neurosci 34:4345-63. 2014
    ....
  6. pmc Impairment and recovery of hand use after unilateral section of the dorsal columns of the spinal cord in squirrel monkeys
    Hui Xin Qi
    Department of Psychology, Vanderbilt University, Nashville, TN 37240, USA
    Behav Brain Res 252:363-76. 2013
    ..In addition, axon branches from peripheral afferents that terminate on neurons in the dorsal horn of the spinal cord are likely central to the functional recovery. ..
  7. pmc Optical imaging in galagos reveals parietal-frontal circuits underlying motor behavior
    Iwona Stepniewska
    Department of Psychology, Vanderbilt University, Nashville, TN 37203, USA
    Proc Natl Acad Sci U S A 108:E725-32. 2011
    ..Thus, long-train stimulation is effective in evoking ethologically relevant sequences of movements by activating nodes in a cortical network for a behaviorally relevant period rather than spreading activation in a nonspecific manner...
  8. doi request reprint Transient middle cerebral artery occlusion disrupts the forelimb movement representations of rat motor cortex
    Omar A Gharbawie
    Department of Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, Lethbridge, Alberta, Canada
    Eur J Neurosci 28:951-63. 2008
    ..Thus, M1 dysfunction contributes to the impairments that ensue from proximal MCA occlusion, even when the infarct is limited to subcortical regions...
  9. ncbi request reprint Attempt-dependent decrease in skilled reaching characterizes the acute postsurgical period following a forelimb motor cortex lesion: an experimental demonstration of learned nonuse in the rat
    Crystal A Erickson
    Department of Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Drive, Lethbridge, Alta T1K 3M4, Canada
    Behav Brain Res 179:208-18. 2007
    ....
  10. ncbi request reprint Skilled reaching impairments from the lateral frontal cortex component of middle cerebral artery stroke: a qualitative and quantitative comparison to focal motor cortex lesions in rats
    Omar A Gharbawie
    Department of Psychology and Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Dr, Lethbridge, AB, Canada T1K 3M4
    Behav Brain Res 156:125-37. 2005
    ..The results are discussed in relation to the contribution of lateral frontal cortex injury to MCA stroke sensorimotor syndromes...
  11. ncbi request reprint Parallel stages of learning and recovery of skilled reaching after motor cortex stroke: "oppositions" organize normal and compensatory movements
    Omar A Gharbawie
    Department of Psychology and Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Dr, Lethbridge, Alberta T1K 3M4, Canada
    Behav Brain Res 175:249-62. 2006
    ..That the stages of recovery from motor cortex stroke parallel those of initial acquisition are discussed in relation to contemporary explanations of diaschisis and the contribution of motor cortex to motor learning...
  12. ncbi request reprint Nicotine stimulates dendritic arborization in motor cortex and improves concurrent motor skill but impairs subsequent motor learning
    Claudia L R Gonzalez
    Department of Psychology and Neuroscience, Canadian Centre for Behavioral Neuroscience, University of Lethbridge, Lethbridge, Alberta T1K 3M4, Canada
    Synapse 55:183-91. 2005
    ..The results suggest that plasticity coincidence with skilled training is essential to skilled motor learning, but this expenditure can impair subsequent learning...
  13. ncbi request reprint Evidence for bilateral control of skilled movements: ipsilateral skilled forelimb reaching deficits and functional recovery in rats follow motor cortex and lateral frontal cortex lesions
    Claudia L R Gonzalez
    Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Dr, Lethbridge, AB T1K 3M4, Canada
    Eur J Neurosci 20:3442-52. 2004
    ....
  14. pmc Cell-poor septa separate representations of digits in the ventroposterior nucleus of the thalamus in monkeys and prosimian galagos
    Hui Xin Qi
    Department of Psychology, Vanderbilt University, Nashville, Tennessee 37203, USA
    J Comp Neurol 519:738-58. 2011
    ..As vGluT2 is expressed in the synaptic terminations from dorsal columns and trigeminal brainstem nuclei, the effectiveness of vGluT2 preparations in revealing septa in VP likely reflects a lack of synapses using glutamate in the septa...
  15. ncbi request reprint Chronic low-dose administration of nicotine facilitates recovery and synaptic change after focal ischemia in rats
    Claudia L R Gonzalez
    Department of Psychology and Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Drive, Lethbridge, AB T1K 3M4, Canada
    Neuropharmacology 50:777-87. 2006
    ..The results suggest that the behavioral enhancement in the stroke+nicotine group might be attributable to the enhanced dendritic growth in residual cortical motor regions...
  16. ncbi request reprint Cortical connections to single digit representations in area 3b of somatosensory cortex in squirrel monkeys and prosimian galagos
    Chia Chi Liao
    Department of Psychology, Vanderbilt University, Nashville, Tennessee
    J Comp Neurol 521:3768-90. 2013
    ..The organization of feedback connections could provide a substrate for the integration of information across the representations of adjacent digits in area 3b...
  17. ncbi request reprint The topography of three-dimensional exploration: a new quantification of vertical and horizontal exploration, postural support, and exploratory bouts in the cylinder test
    Omar A Gharbawie
    Department of Psychology and Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Dr, Lethbridge, Alta, Canada T1K 3M4
    Behav Brain Res 151:125-35. 2004
    ..The results are discussed in relation to the use of the cylinder test for analyzing a number of behaviors including exploration, locomotion, and supporting reactions...
  18. ncbi request reprint Cholinergic and serotonergic neocortical projection lesions given singly or in combination cause only mild impairments on tests of skilled movement in rats: evaluation of a model of dementia
    Omar A Gharbawie
    Department of Psychology and Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Dr, Alberta T1K 3M4, Canada
    Brain Res 970:97-109. 2003
    ..The results are discussed in relation to the problems associated with the development of a unilateral model of dementia...
  19. ncbi request reprint Effects of muscimol inactivations of functional domains in motor, premotor, and posterior parietal cortex on complex movements evoked by electrical stimulation
    Iwona Stepniewska
    Department of Psychology, Vanderbilt University, Nashville, Tennessee
    J Neurophysiol 111:1100-19. 2014
    ..Overall, the results support the conclusion that PPC, PMC, and M1 are subdivided into functional domains that are hierarchically related within parallel networks. ..
  20. pmc Cortical and subcortical plasticity in the brains of humans, primates, and rats after damage to sensory afferents in the dorsal columns of the spinal cord
    Jon H Kaas
    Department of Psychology, Vanderbilt University, Nashville, TN 37203, USA
    Exp Neurol 209:407-16. 2008
    ..Thus, this and other therapeutic strategies have the potential of enhancing sensorimotor recoveries after spinal cord injuries in humans...
  21. ncbi request reprint The exploratory behavior of rats in an open environment optimizes security
    Ian Q Whishaw
    Department of Neuroscience, Canadian Centre for Behavioural Neuroscience, Lethbridge, Alta, Canada
    Behav Brain Res 171:230-9. 2006
    ..The results are discussed in relation to the advantages of investigating the influence of neural processes on exploration in terms optimization theory versus motivational theory...
  22. pmc Cortical networks for ethologically relevant behaviors in primates
    Jon H Kaas
    Department of Psychology, Vanderbilt University, Nashville, TN 37240 7817, USA
    Am J Primatol 75:407-14. 2013
    ..However, functional domains may have evolved in motor cortex before the emergence of archaic primates...
  23. pmc Thalamic connections of architectonic subdivisions of temporal cortex in grey squirrels (Sciurus carolinensis)
    Peiyan Wong
    Department of Psychology, Vanderbilt University, Nashville, Tennessee 37212, USA
    J Comp Neurol 510:440-61. 2008
    ..Understanding how temporal cortex is functionally organized in squirrels can guide interpretations of temporal cortex organization in other rodents in which architectonic subdivisions are not as obvious...
  24. pmc The organization and evolution of dorsal stream multisensory motor pathways in primates
    Jon H Kaas
    Department of Psychology, Vanderbilt University Nashville, TN, USA
    Front Neuroanat 5:34. 2011
    ..While several classes of PPC modules appear to be retained by all primates, elaboration and differentiation of these modules likely occurred in some primates, especially humans...