D C Rojas

Summary

Affiliation: University of Colorado Health Sciences Center
Country: USA

Publications

  1. ncbi request reprint Smaller left hemisphere planum temporale in adults with autistic disorder
    Donald C Rojas
    Department of Psychiatry, University of Colorado Health Sciences Center, Box C268 68 CPH, 4200 East 9th Avenue, Denver, CO 80262, USA
    Neurosci Lett 328:237-40. 2002
  2. ncbi request reprint Neuromagnetic alpha suppression during an auditory sternberg task. Evidence for a serial, self-terminating search of short-term memory
    D C Rojas
    Biomagnetic Imaging Laboratory, Department of Psychiatry, Box C268 68 CPH, University of Colorado Health Sciences Center, 4200 E 9th Avenue, 80262, Denver, CO, USA
    Brain Res Cogn Brain Res 10:85-9. 2000
  3. ncbi request reprint Planum temporale volume in children and adolescents with autism
    Donald C Rojas
    Department of Psychiatry, University of Colorado Health Sciences Center, Box C268 68 CPH Rm 2J08, Denver, CO, USA
    J Autism Dev Disord 35:479-86. 2005
  4. pmc Regional gray matter volumetric changes in autism associated with social and repetitive behavior symptoms
    Donald C Rojas
    Department of Psychiatry, University of Colorado Health Sciences Center, Denver, CO, 80220, USA
    BMC Psychiatry 6:56. 2006
  5. pmc Neuromagnetic evidence of broader auditory cortical tuning in schizophrenia
    Donald C Rojas
    Department of Psychiatry, University of Colorado at Denver and Health Sciences Center, 4200 E 9th Avenue, Denver, CO 80220, United States
    Schizophr Res 97:206-14. 2007
  6. pmc Reduced neural synchronization of gamma-band MEG oscillations in first-degree relatives of children with autism
    Donald C Rojas
    University of Colorado at Denver and Health Sciences Center, 4200 E, 9th Avenue, Denver, CO, USA
    BMC Psychiatry 8:66. 2008
  7. ncbi request reprint Development of the 40Hz steady state auditory evoked magnetic field from ages 5 to 52
    Donald C Rojas
    Department of Psychiatry, University of Colorado Health Sciences Center, Box C268 68 CPH, 4200 E 9th Avenue, Denver, CO 80262, USA
    Clin Neurophysiol 117:110-7. 2006
  8. ncbi request reprint Hippocampus and amygdala volumes in parents of children with autistic disorder
    Donald C Rojas
    Department of Psychiatry, University of Colorado Health Sciences Center, Box C268 68 CPH, 4200 E 9th Ave, Denver, CO 80262, USA
    Am J Psychiatry 161:2038-44. 2004
  9. ncbi request reprint Reduced hippocampal volume in association with p50 nonsuppression following traumatic brain injury
    D B Arciniegas
    Research, Radiology, and Psychiatric Services, Denver Veterans Affairs Medical Center, CO, USA
    J Neuropsychiatry Clin Neurosci 13:213-21. 2001
  10. ncbi request reprint Auditory evoked magnetic fields in adults with fragile X syndrome
    D C Rojas
    University of Colorado Health Sciences Center, Box C268-68 CPH, 4200 E. 9th Avenue, Denver, CO 80262, USA
    Neuroreport 12:2573-6. 2001

Research Grants

  1. Brain Lateralization in Adolescent Psychosis
    Donald Rojas; Fiscal Year: 2005

Detail Information

Publications23

  1. ncbi request reprint Smaller left hemisphere planum temporale in adults with autistic disorder
    Donald C Rojas
    Department of Psychiatry, University of Colorado Health Sciences Center, Box C268 68 CPH, 4200 East 9th Avenue, Denver, CO 80262, USA
    Neurosci Lett 328:237-40. 2002
    ..003). No differences in HG volumes were observed between the two groups. The volume reduction seen in the left hemisphere of the autism group may suggest an early neurodevelopmental disturbance in autism that impacts language development...
  2. ncbi request reprint Neuromagnetic alpha suppression during an auditory sternberg task. Evidence for a serial, self-terminating search of short-term memory
    D C Rojas
    Biomagnetic Imaging Laboratory, Department of Psychiatry, Box C268 68 CPH, University of Colorado Health Sciences Center, 4200 E 9th Avenue, 80262, Denver, CO, USA
    Brain Res Cogn Brain Res 10:85-9. 2000
    ..This may indicate that STM scanning is serial, but self-terminates when matching occurs...
  3. ncbi request reprint Planum temporale volume in children and adolescents with autism
    Donald C Rojas
    Department of Psychiatry, University of Colorado Health Sciences Center, Box C268 68 CPH Rm 2J08, Denver, CO, USA
    J Autism Dev Disord 35:479-86. 2005
    ..No differences in HG volumes were observed between the two groups. Lack of PT asymmetry may suggest an early neurodevelopmental disturbance in autism...
  4. pmc Regional gray matter volumetric changes in autism associated with social and repetitive behavior symptoms
    Donald C Rojas
    Department of Psychiatry, University of Colorado Health Sciences Center, Denver, CO, 80220, USA
    BMC Psychiatry 6:56. 2006
    ..We attempted to replicate these whole brain studies and to correlate regional volume changes with several autism symptom measures...
  5. pmc Neuromagnetic evidence of broader auditory cortical tuning in schizophrenia
    Donald C Rojas
    Department of Psychiatry, University of Colorado at Denver and Health Sciences Center, 4200 E 9th Avenue, Denver, CO 80220, United States
    Schizophr Res 97:206-14. 2007
    ....
  6. pmc Reduced neural synchronization of gamma-band MEG oscillations in first-degree relatives of children with autism
    Donald C Rojas
    University of Colorado at Denver and Health Sciences Center, 4200 E, 9th Avenue, Denver, CO, USA
    BMC Psychiatry 8:66. 2008
    ..Transient auditory gamma-band responses, however, have not yet been investigated in autism or in the first-degree relatives of persons with the autism...
  7. ncbi request reprint Development of the 40Hz steady state auditory evoked magnetic field from ages 5 to 52
    Donald C Rojas
    Department of Psychiatry, University of Colorado Health Sciences Center, Box C268 68 CPH, 4200 E 9th Avenue, Denver, CO 80262, USA
    Clin Neurophysiol 117:110-7. 2006
    ..Adults exhibit strong auditory 40 Hz magnetic steady state responses (SSR). Although EEG measured SSR has been studied in children, the developmental course of the magnetic SSR is unknown...
  8. ncbi request reprint Hippocampus and amygdala volumes in parents of children with autistic disorder
    Donald C Rojas
    Department of Psychiatry, University of Colorado Health Sciences Center, Box C268 68 CPH, 4200 E 9th Ave, Denver, CO 80262, USA
    Am J Psychiatry 161:2038-44. 2004
    ..The authors hypothesized that parents of children with a diagnosis of autistic disorder would show similar changes in these structures...
  9. ncbi request reprint Reduced hippocampal volume in association with p50 nonsuppression following traumatic brain injury
    D B Arciniegas
    Research, Radiology, and Psychiatric Services, Denver Veterans Affairs Medical Center, CO, USA
    J Neuropsychiatry Clin Neurosci 13:213-21. 2001
    ..Findings support the hypothesis that hippocampal injury underlies P50 nonsuppression post TBI and suggest that such structural abnormalities may be observed even in "mildly" injured persons...
  10. ncbi request reprint Auditory evoked magnetic fields in adults with fragile X syndrome
    D C Rojas
    University of Colorado Health Sciences Center, Box C268-68 CPH, 4200 E. 9th Avenue, Denver, CO 80262, USA
    Neuroreport 12:2573-6. 2001
    ..Anomalous cerebral lateralization may suggest an early critical window for effects on neocortical development of the fragile X mental retardation protein (FMRP) produced by the FMR1 gene in individuals with FXS...
  11. ncbi request reprint Anomalous somatosensory cortical localization in schizophrenia
    Martin Reite
    Department of Psychiatry, University of Colorado Health Sciences Center, Denver, CO 80262, USA
    Am J Psychiatry 160:2148-53. 2003
    ..This study examines magnetoencephalographic localization of field sources evoked by tactile stimulation generated in area 3b of the primary somatosensory cortex in patients with schizophrenia compared with normal subjects...
  12. doi request reprint Impairments in phonological processing and nonverbal intellectual function in parents of children with autism
    Gwen L Schmidt
    Colorado State University, Fort Collins, CO, USA
    J Clin Exp Neuropsychol 30:557-67. 2008
    ..Our finding of nonword repetition difficulties, along with others' previous findings for nonword reading in autism families, suggests that problems in phonological processing might be characteristic of the broad autism phenotype...
  13. ncbi request reprint Gray matter volume differences and the effects of smoking on gray matter in schizophrenia
    Jason R Tregellas
    Research Service, Denver VA Medical Center, Denver, Colorado, USA
    Schizophr Res 97:242-9. 2007
    ..The present study used voxel-based morphometry (VBM) to examine differences in gray matter in subjects with schizophrenia and evaluate the effects of smoking on this measure...
  14. ncbi request reprint Neurological signs and cognitive performance distinguish between adolescents with and without psychosis
    David B Arciniegas
    Neuropsychiatry Service, University of Colorado School of Medicine, Campus Box C268 25, 4200 East Ninth Avenue, Denver, CO 80262, USA
    J Neuropsychiatry Clin Neurosci 19:266-73. 2007
    ..There were no relationships between medication status and either NES or IQ scores. These results support a broadly conceived neurodevelopmental formulation of adolescent psychotic disorders...
  15. pmc Aberrant functional organization and maturation in early-onset psychosis: evidence from magnetoencephalography
    Tony W Wilson
    Neuromagnetic Imaging Center, Department of Psychiatry, University of Colorado, Health Sciences Center, Denver, CO 80262, USA
    Psychiatry Res 156:59-67. 2007
    ..These findings suggest aberrant maturation underlies the reduction in cerebral laterality associated with psychosis...
  16. pmc Cortical gamma generators suggest abnormal auditory circuitry in early-onset psychosis
    Tony W Wilson
    Magnetoencephalography Laboratory, Department of Neurology, Wake Forest University Health Sciences, Winston Salem, NC 27103, USA
    Cereb Cortex 18:371-8. 2008
    ..e., ear-of-stimulation effects) potentially suggesting that multiple stages along auditory pathways contribute to connectivity aberrations found in patients with psychosis...
  17. ncbi request reprint Comparison of the O-Log and GOAT as measures of posttraumatic amnesia
    Kimberly L Frey
    Brain Injury Rehabilitation Unit, HealthONE Spalding Rehabilitation Hospital, Aurora, Colorado 80011, USA
    Brain Inj 21:513-20. 2007
    ..To compare PTA severity and duration assessments made by Orientation Log (O-Log) and the Galveston Orientation and Amnesia Test (GOAT) and the relationship of data yielded by these assessments to rehabilitation outcomes...
  18. pmc Increased hemodynamic response in the hippocampus, thalamus and prefrontal cortex during abnormal sensory gating in schizophrenia
    Jason R Tregellas
    VISN19 MIRECC, Denver VA Medical Center, Denver, Colorado, USA
    Schizophr Res 92:262-72. 2007
    ..This study used functional magnetic resonance imaging (fMRI) to investigate the functional neuroanatomy of sensory gating deficits in schizophrenia...
  19. ncbi request reprint A voxel-based morphometry study of gray matter in parents of children with autism
    Eric Peterson
    Department of Psychiatry, University of Colorado Health Sciences Center, Denver, Colorado 80262, USA
    Neuroreport 17:1289-92. 2006
    ..This investigation constitutes the first whole-brain study of regional brain volume in the parents of autistic children, and suggests that a number of structural changes observed in autism may be familial...
  20. ncbi request reprint Increased hippocampal volume in schizophrenics' parents with ancestral history of schizophrenia
    Josette G Harris
    Department of Psychiatry, University of Colorado School of Medicine, 4200 E 9th Avenue, Denver, CO 80262, USA
    Schizophr Res 55:11-7. 2002
    ..The aim of this study was to measure the hippocampal volume of the parents of schizophrenic probands, in relationship to the apparent transmission of genetic risk...
  21. ncbi request reprint Effect of task difficulty on the functional anatomy of temporal processing
    Jason R Tregellas
    Department of Psychiatry, University of Colorado Health Sciences Center, Campus Box C268 71, 4200 E 9th Avenue, Denver, CO 80262, USA
    Neuroimage 32:307-15. 2006
    ....
  22. ncbi request reprint Alterations in tonotopy and auditory cerebral asymmetry in schizophrenia
    Donald C Rojas
    Department of Psychiatry, University of Colorado Health Sciences Center, Denver, Colorado 80262, USA
    Biol Psychiatry 52:32-9. 2002
    ..This study examines whether the most fundamental level of auditory cortical organization, tonotopy, is altered in schizophrenia...
  23. pmc Children and adolescents with autism exhibit reduced MEG steady-state gamma responses
    Tony W Wilson
    Department of Psychiatry, Neuromagnetic Imaging Center, University of Colorado, Health Sciences Center, Denver, Colorado 80262, USA
    Biol Psychiatry 62:192-7. 2007
    ..This study examines the integrity of local circuitry by focusing on gamma band activity in auditory cortices of children and adolescents with autism...

Research Grants1

  1. Brain Lateralization in Adolescent Psychosis
    Donald Rojas; Fiscal Year: 2005
    ....