Research Topics
| Andrew C PapanicolaouSummaryAffiliation: Baylor College of Medicine Country: USA Publications
| Collaborators
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Detail Information
Publications
Brain mechanisms for reading in children with and without dyslexia: a review of studies of normal development and plasticityAndrew C Papanicolaou
Department of Neurosurgery, Vivian L Smith Center for Neurologic Research, University of Texas Houston Medical School, 77030, USA
Dev Neuropsychol 24:593-612. 2003....- Early development of neurophysiological processes involved in normal reading and reading disability: a magnetic source imaging studyPanagiotis G Simos
Department of Neurosurgery, University of Texas Health Science Center at Houston, Houston, TX, USA
Neuropsychology 19:787-98. 2005.... - Integrating sensory and motor mapping in a comprehensive MEG protocol: clinical validity and replicabilityEduardo M Castillo
Vivian L Smith Center for Neurologic Research, Department of Neurosurgery, University of Texas Houston Medical School, Houston, TX 77030, USA
Neuroimage 21:973-83. 2004..This method minimizes methodological problems and improves our knowledge of the spatiotemporal organization of the sensorimotor cortical network and helps to optimize the surgical management of patients with perirolandic lesions... - Atypical language representation in patients with chronic seizure disorder and achievement deficits with magnetoencephalographyJoshua I Breier
Vivian L Smith Center for Neurologic Research, Department of Neurosurgery, Division of Clinical Neurosciences, The University of Texas Health Science Center at Houston, Texas 77030, USA
Epilepsia 46:540-8. 2005..To characterize the relation between hemispheric asymmetries in language-specific brain activity and reading/spelling achievement by using magnetoencephalography (MEG)... - When epilepsy interferes with word comprehension: findings in Landau-Kleffner syndromeEduardo M Castillo
Department of Pediatrics, University of Texas Houston Medical School, Houston, TX 77030, USA
J Child Neurol 23:97-101. 2008.... - Spatiotemporal patterns of language-specific brain activity in patients with chronic aphasia after stroke using magnetoencephalographyJoshua I Breier
Department of Neurosurgery, Division of Clinical Neurosciences, Vivian L Smith Center for Neurologic Research, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
Neuroimage 23:1308-16. 2004.... - Contributions of magnetic source imaging to the understanding of dyslexiaShirin Sarkari
Department of Neurosurgery, Vivian L. Smith Center for Neurologic Research, University of Texas Health Science Center, Houston 77030, USA
Semin Pediatr Neurol 9:229-38. 2002..These findings suggest that dyslexia represents a functional deficit in the neural circuit that mediates the conversion of print to sound, which is amenable to change given adequate instruction... - Cortical representation of dermatomes: MEG-derived maps after tactile stimulationEduardo M Castillo
Department of Neurosurgery, Vivian L Smith Center for Neurologic Research, University of Texas Houston, Medical School, 1333 Moursund Street, Ste H114, Houston, TX 77030, USA
Neuroimage 25:727-33. 2005.... - Multimodality neuroimaging evaluation improves the detection of subtle cortical dysplasia in seizure patientsWenbo Zhang
Department of Neurosurgery, Vivian L Smith Center for Neurologic Research, Texas Comprehensive Epilepsy Program, University of Texas Health Science Center at Houston, 1333 Moursund Street, Ste H114, Houston, TX 77030, USA
Neurol Res 25:53-7. 2003..Normal magnetic resonance images should be re-evaluated for subtle signs of focal cortical dysplasia especially when magnetoencephalography recording demonstrate focal epileptic discharges... - Magnetoencephalographic studies of language reorganization after cerebral insultJoshua I Breier
Division of Clinical Neurosciences, Department of Neurosurgery, University of Texas Houston Health Science Center, Houston, TX 77030, USA
Arch Phys Med Rehabil 87:S77-83. 2006.... - Magnetocephalography: a noninvasive alternative to the Wada procedureAndrew C Papanicolaou
Department of Neurosurgery, Vivian L Smith Center for Neurologic Research, Houston, Texas, USA
J Neurosurg 100:867-76. 2004..In this study the authors evaluated the sensitivity and selectivity of a noninvasive language mapping procedure based on magnetoencephalography (MEG), for determining hemispheric dominance for language functions... - A review of clinical applications of magnetoencephalographyAndrew C Papanicolaou
Department of Neurosurgery, Vivian L. Smith Center for Neurologic Research, University of Texas - Health Science Center at Houston, Houston, Texas 77030, USA
Int Rev Neurobiol 68:223-47. 2005 - Brain activation profiles during the early stages of reading acquisitionPanagiotis G Simos
Department of Neurosurgery, The Vivian L Smith Center for Neurologic Research, The University of Texas Health Science Center Houston, 77030, USA
J Child Neurol 17:159-63. 2002..This finding is consistent with current cognitive models of reading acquisition and dyslexia, pointing to the critical role of phonologic awareness skills in learning to read... - A comparison of functional MRI and magnetoencephalography for receptive language mappingRebecca L Billingsley-Marshall
Division of Clinical Neurosciences, Department of Neurosurgery, University of Texas Health Science Center at Houston, 1333 Moursund Street, Suite H114, Houston, TX 77030, USA
J Neurosci Methods 161:306-13. 2007..Laterality quotients derived from the two modalities showed poor agreement between the two methods for commonly active regions of interest. Locations of peak activity also varied considerably within participants between the two methods... - Abnormal activation of temporoparietal language areas during phonetic analysis in children with dyslexiaJoshua I Breier
Department of Neurosurgery, Division of Clinical Neurosciences, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
Neuropsychology 17:610-21. 2003.... - Localization of ictal and interictal bursting epileptogenic activity in focal cortical dysplasia: agreement of magnetoencephalography and electrocorticographyHideaki Ishibashi
Department of Neurosurgery, Vivian L Smith Center for Neurologic Research, The University of Texas Health Science Center at Houston, 77030, USA
Neurol Res 24:525-30. 2002..This was critical for pre-surgical planning regarding placement of intracranial electrodes and for risk-benefit evaluation... - Somatosensory evoked magnetic fields in hemimegalencephalyHideaki Ishibashi
Department of Neurosurgery, Vivian L Smith Center for Neurologic Research, The University of Texas Health Science Center at Houston, 77030, USA
Neurol Res 24:459-62. 2002..These findings suggest that the presence and location of MEG-derived somatosensory maps reflect the severity of the cortical lamination defects in hemimegalencephaly... - Differential brain activation patterns during perception of voice and tone onset time series: a MEG studyAndrew C Papanicolaou
Vivian L Smith Center for Neurologic Research, Department of Neurosurgery, University of Texas Houston Medical School, Houston, TX 77030, USA
Neuroimage 18:448-59. 2003..Differences in late activation patterns potentially reflect the operation of a postperceptual process (e.g., rehearsal in working memory) that is restricted to speech stimuli... - Neuroimaging features of epidermal nevus syndromeWenbo Zhang
Department of Neurosurgery, Vivian L. Smith Center for Neurologic Research, Texas Comprehensive Epilepsy Program, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
AJNR Am J Neuroradiol 24:1468-70. 2003..One patient underwent hemispherectomy because of the medically intractable seizure. He remained seizure free with topiramate monotherapy... - Multimodality functional imaging evaluation in a patient with Rasmussen's encephalitisHideaki Ishibashi
Department of Neurosurgery, Vivian L Smith Center for Neurologic Research, Division of Clinical Neurosciences, The University of Texas Health Science Center at Houston, USA
Brain Dev 24:239-44. 2002..In addition, MEG may provide insights about the cortical reorganization of somatosensory cortex following hemispherectomy... - The hippocampus and memory of verbal and pictorial materialAndrew C Papanicolaou
Vivian L Smith Center for Neurologic Research, Department of Neurosurgery, University of Texas Health Science Center Houston, Texas 77030, USA
Learn Mem 9:99-104. 2002..This study demonstrates the specialization of the two medial temporal lobe (MTL) regions, including the hippocampi, for mnemonic processing of verbal and pictorial items that are difficult to encode verbally... - Brain mechanisms for reading words and pseudowords: an integrated approachPanagiotis G Simos
Vivian L Smith Center for Neurologic Research, Department of Neurosurgery, The University of Texas Houston, Medical School, Houston, TX 77030, USA
Cereb Cortex 12:297-305. 2002.... - Detection and significance of focal, interictal, slow-wave activity visualized by magnetoencephalography for localization of a primary epileptogenic regionHideaki Ishibashi
Vivian L Smith Foundation for Neurological Research, Department of Neurosurgery, The University of Texas Houston Health Science Center, Houston 77030, USA
J Neurosurg 96:724-30. 2002..In the present study the authors examined the significance of focal, slow-wave and interictal spike activity detected using MEG in 29 patients who suffered from MTLE that was not associated with structural brain lesions... - Functional imaging before and after constraint-induced language therapy for aphasia using magnetoencephalographyJoshua I Breier
Division of Clinical Neurosciences in the Department of Neurosurgery, University of Texas Houston Health Science Center, Houston, Texas 77030, USA
Neurocase 12:322-31. 2006..Response to CILT, however, was positively correlated with the degree of pre-therapy MEG activity within posterior areas of the right hemisphere only on an individual basis... - Neocortical reorganization in spina bifidaJenifer Juranek
Department of Pediatrics, University of Texas Health Science Center at Houston, Texas, USA
Neuroimage 40:1516-22. 2008.... - Development and organization of the human brain tissue compartments across the lifespan using diffusion tensor imagingKhader M Hasan
Department of Diagnostic and Interventional Imaging, University of Texas Houston Health Science Center, Houston, Texas, USA
Neuroreport 18:1735-9. 2007..In contrast, cerebrospinal fluid volume increases linearly with age... - Spatiotemporal patterns of brain activation during an action naming task using magnetoencephalographyJoshua I Breier
Center for Clinical Neurosciences, Department of Pediatrics, Neurology, and Neurosurgery, University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
J Clin Neurophysiol 25:7-12. 2008.... - Changes in language-specific brain activation after therapy for aphasia using magnetoencephalography: a case studyJoshua I Breier
Department of Pediatrics, Center for Clinical Neurosciences, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
Neurocase 13:169-77. 2007..Results provide support, in the same individual, for a role for both hemispheres in recovery of language function after therapy for chronic aphasia... - Aberrant cortical functionality and somatosensory deficits after strokeEduardo M Castillo
Center for Clinical Neurosciences, Department of Pediatrics, The University of Texas Medical School, Houston, Texas 77030, USA
J Clin Neurophysiol 25:132-8. 2008..Lack of activation of SI cortex after stimulation of the affected hand and spontaneous slow oscillatory activity in postcentral areas are neurophysiological correlates of somatosensory deficit in the postacute phase of stroke... - Behavioral and neurophysiologic response to therapy for chronic aphasiaJoshua I Breier
Center for Clinical Neurosciences in the Department of Pediatrics, University of Texas Health Science Center at Houston, Houston, TX, USA
Arch Phys Med Rehabil 90:2026-33. 2009..Breier JI, Juranek J, Maher LM, Schmadeke S, Men D, Papanicolaou AC. Behavioral and neurophysiologic response to therapy for chronic aphasia... - Diffusion tensor tractography quantification of the human corpus callosum fiber pathways across the lifespanKhader M Hasan
Department of Diagnostic and Interventional Imaging, University of Texas Medical School at Houston, 6431 Fannin Street, MSB 2 100, Houston, TX 77030, USA
Brain Res 1249:91-100. 2009..Our study provides for the first time normative baseline macro- and microstructural age trajectories of the human CC subvolumes across the lifespan that can be helpful for normative behavioral and clinical studies... - Development and aging of the healthy human brain uncinate fasciculus across the lifespan using diffusion tensor tractographyKhader M Hasan
Department of Diagnostic and Interventional Imaging, University of Texas Medical School at Houston, 6431 Fannin Street, MSB 2 100, Houston, TX 77030, USA
Brain Res 1276:67-76. 2009..Results of this study may lend themselves to better understanding of UF role in future behavioral and clinical studies... - Changes in maps of language activity activation following melodic intonation therapy using magnetoencephalography: two case studiesJoshua I Breier
Center for Clinical Neurosciences in the Department of Pediatrics, The University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
J Clin Exp Neuropsychol 32:309-14. 2010..Results are consistent with hypotheses that melodic intonation therapy acts through promotion of left hemisphere activation... - Transcallosal connectivity and cortical rhythms: findings in children with spina bifidaEduardo M Castillo
Center for Clinical Neurosciences, Department of Pediatrics, Medical School, University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
Neuroreport 20:1188-92. 2009..Atypical cortical oscillatory activity is associated with reduced transcallosal connectivity in children with spina bifida... - Magnetoencephalography (MEG) and magnetic source imaging (MSI)James W Wheless
Department of Neurology, Texas Comprehensive Epilepsy Program, University of Texas Health Science Center, Houston, Texas, USA
Neurologist 10:138-53. 2004..The magnetic source image (MSI) is created when the MEG data is superimposed on a magnetic resonance image (MRI)... - Reliability and validity of functional neuroimaging techniques for identifying language-critical areas in children and adultsRebecca L Billingsley-Marshall
Vivian L Smith Center for Neurologic Research, Department of Neurosurgery, Division of Clinical Neurosciences, University of Texas Houston Medical School, 77030, USA
Dev Neuropsychol 26:541-63. 2004.... - Altering the brain circuits for reading through intervention: a magnetic source imaging studyPanagiotis G Simos
Department of NeurosurgeryVivian L Smith Institute of Neurologic Research, University of Texas, Health Science Center, Houston, TX, USA
Neuropsychology 21:485-96. 2007..Nonimpaired readers did not show systematic changes in brain activity across visits... - Toward the substitution of invasive electroencephalography in epilepsy surgeryAndrew C Papanicolaou
Division of Clinical Neurosciences in the Department of Neurosurgery, University of Texas - Houston Health Science Center, Houston, Texas 77030, USA
J Clin Neurophysiol 22:231-7. 2005..The authors predict the replacement of the more invasive procedure with MEG in the near future for TLE cases, subsequent to the optimization of the conditions under which preoperative MEG is performed... - Reproducibility of measures of neurophysiological activity in Wernicke's area: a magnetic source imaging studyPanagiotis G Simos
Department of Psychology, University of Crete, Rethymno, Crete 74100, Greece
Clin Neurophysiol 116:2381-91. 2005..The purpose of this study was to evaluate the reproducibility of estimates of neurophysiological activity obtained with Magnetic Source Imaging... - Magnetic source imaging studies of dyslexia interventionsPanagiotis G Simos
Department of Psychology, University of Crete, Rethymno, Greece
Dev Neuropsychol 30:591-611. 2006.... - Time-locked brain activity associated with emotion: a pilot MEG studyJose Leon-Carrion
Human Neuropsychology Laboratory, Departamento de Psicologia Experimental, University of Seville, Seville, Spain
Brain Inj 20:857-65. 2006..To examine the time course of brain activation in response to emotionally evocative pictures... - MEG localization of language-specific cortex utilizing MR-FOCUSSAndrew C Papanicolaou
Neurology 64:765; author reply 765. 2005 - Hemispheric language dominance in magnetoencephalography: sensitivity, specificity, and data reduction techniquesWarren S Merrifield
Huntington Medical Research Institutes, Pasadena, CA, USA
Epilepsy Behav 10:120-8. 2007..00. These findings are consistent with previous MEG investigations of language function in comparison with the Wada technique and support the use of MEG language mapping in most patients with an IQ within or above the average range... - Aberrant spatiotemporal activation profiles associated with math difficulties in children: a magnetic source imaging studyPanagiotis G Simos
Department of Pediatrics, Children s Learning Institute, University of Texas Health Science Center at Houston, TX, USA
Neuropsychology 22:571-84. 2008.... - Intensive instruction affects brain magnetic activity associated with oral word reading in children with persistent reading disabilitiesPanagiotis G Simos
University of Crete, Department of Psychology, Rethymno, Crete, Greece
J Learn Disabil 40:37-48. 2007..These findings extend previous results in demonstrating significant changes in the spatiotemporal profile of activation associated with word reading in response to reading remediation... - What aspects of experience can functional neuroimaging be expected to reveal?Andrew C Papanicolaou
Division of Clinical Neuroscience Department of Neurosurgery, The University of Texas Houston Medical School, 1333 Moursund Suite H114, Houston, Texas 77030, USA
Int J Psychophysiol 64:101-5. 2007....