Research Topics
| D C RojasSummaryAffiliation: University of Colorado Health Sciences Center Country: USA Publications
Research Grants
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Detail Information
Publications
Neuromagnetic alpha suppression during an auditory sternberg task. Evidence for a serial, self-terminating search of short-term memoryD 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...
Regional gray matter volumetric changes in autism associated with social and repetitive behavior symptomsDonald 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...- Neuromagnetic evidence of broader auditory cortical tuning in schizophreniaDonald 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.... - Reduced neural synchronization of gamma-band MEG oscillations in first-degree relatives of children with autismDonald 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... - Development of the 40Hz steady state auditory evoked magnetic field from ages 5 to 52Donald 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... - Planum temporale volume in children and adolescents with autismDonald 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... - Hippocampus and amygdala volumes in parents of children with autistic disorderDonald 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... - Smaller left hemisphere planum temporale in adults with autistic disorderDonald 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... - Reduced hippocampal volume in association with p50 nonsuppression following traumatic brain injuryD 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... - Auditory evoked magnetic fields in adults with fragile X syndromeD 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... - Anomalous somatosensory cortical localization in schizophreniaMartin 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... 
Impairments in phonological processing and nonverbal intellectual function in parents of children with autismGwen 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...- Gray matter volume differences and the effects of smoking on gray matter in schizophreniaJason 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... - Neurological signs and cognitive performance distinguish between adolescents with and without psychosisDavid 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... - Aberrant functional organization and maturation in early-onset psychosis: evidence from magnetoencephalographyTony 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... - Cortical gamma generators suggest abnormal auditory circuitry in early-onset psychosisTony 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... - Comparison of the O-Log and GOAT as measures of posttraumatic amnesiaKimberly 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... - Increased hemodynamic response in the hippocampus, thalamus and prefrontal cortex during abnormal sensory gating in schizophreniaJason 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... - A voxel-based morphometry study of gray matter in parents of children with autismEric 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... - Increased hippocampal volume in schizophrenics' parents with ancestral history of schizophreniaJosette 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..Rather, it appears that clinically unaffected parents who transmit apparent genetic risk for schizophrenia may have increased hippocampal volume, which may be a protective factor against the illness... - Effect of task difficulty on the functional anatomy of temporal processingJason 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.... - Alterations in tonotopy and auditory cerebral asymmetry in schizophreniaDonald C Rojas
Department of Psychiatry, University of Colorado Health Sciences Center, Denver, Colorado 80262, USA
Biol Psychiatry 52:32-9. 2002..Alterations in fundamental sensory organization may underlie or interact with higher order cognitive mechanisms to produce changes in cognitive task performance... - Children and adolescents with autism exhibit reduced MEG steady-state gamma responsesTony 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 Grants
- Brain Lateralization in Adolescent PsychosisDonald Rojas; Fiscal Year: 2005....