Research Topics
| R A PoldrackSummaryAffiliation: Harvard University Country: USA Publications
| Collaborators
|
Detail Information
Publications
Pediatric functional magnetic resonance imaging: progress and challengesRussell A Poldrack
Massachusetts General Hospital NMR Center and Harvard Medical School, Charlestown, Massachusetts 02131, USA
Top Magn Reson Imaging 13:61-70. 2002....- Neural systems for perceptual skill learningRussell A Poldrack
MGH NMR Center, 149 13th Street, Charlestown, MA 02131, USA
Behav Cogn Neurosci Rev 1:76-83. 2002.... - Interactive memory systems in the human brainR A Poldrack
Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital, and Harvard Medical School, Charlestown, Massachusetts 02131, USA
Nature 414:546-50. 2001..However, this dependence rapidly declined with training, as predicted by previous computational models of associative learning... - Striatal activation during acquisition of a cognitive skillR A Poldrack
Department of Psychology, Stanford University, USA
Neuropsychology 13:564-74. 1999..Findings provide initial evidence for the role of frontostriatal systems in normal cognitive skill learning... 
The role of left prefrontal cortex in language and memoryJ D Gabrieli
Department of Psychology, Stanford University, Stanford, CA 94305, USA
Proc Natl Acad Sci U S A 95:906-13. 1998....- Hemispheric asymmetries and individual differences in visual concept learning as measured by functional MRIC A Seger
Department of Psychology, Colorado State University, 80523, Fort Collins, CO 80523, USA
Neuropsychologia 38:1316-24. 2000..Such a progression from initial right-hemisphere processing of specific instances to bilateral activity as left-hemisphere conceptual processes are recruited may underlie the development of many forms of visual knowledge... - Functional specialization for semantic and phonological processing in the left inferior prefrontal cortexR A Poldrack
Department of Psychology, Stanford University, CA 94305, USA
Neuroimage 10:15-35. 1999..The results suggest that a distinct region in the left inferior frontal cortex is involved in semantic processing, whereas other regions may subserve phonological processes engaged during both semantic and phonological tasks... - Microstructure of temporo-parietal white matter as a basis for reading ability: evidence from diffusion tensor magnetic resonance imagingT Klingberg
Department of Psychology, Stanford University, California 94305, USA
Neuron 25:493-500. 2000..The anisotropy reflects microstructure of white matter tracts, which may contribute to reading ability by determining the strength of communication between cortical areas involved in visual, auditory, and language processing... - Differences in the hemodynamic response to event-related motor and visual paradigms as measured by near-infrared spectroscopyG Jasdzewski
Athinoula M Martinos Center, Massachusetts General Hospital, Harvard Medical School, 149 13th St, Charlestown, MA 02129, USA
Neuroimage 20:479-88. 2003..We suggest that this difference, which is consistent with functional magnetic resonance imaging (fMRI) data, may be attributable to different capillary transit times in these cortices... - Images of medial temporal lobe functions in human learning and memoryJ D Gabrieli
Department of Psychology, Stanford University, Stanford, California 94305, USA
Neurobiol Learn Mem 70:275-83. 1998..A third study reveals suppression of the MTL during striatum-dependent cognitive skill learning. These studies provide images of MTL activations that are correlated with, independent from, or antagonistic to memory performance... - The neural basis of visual skill learning: an fMRI study of mirror readingR A Poldrack
Department of Psychology, Stanford University, CA 94305 2130, USA
Cereb Cortex 8:1-10. 1998..By examining skill learning and item-specific repetition priming in the same task, this study demonstrates that both of these forms of learning exhibit shifts in the set of neural structures that contribute to performance... - Disrupted neural responses to phonological and orthographic processing in dyslexic children: an fMRI studyE Temple
Institute of Neuroscience, Stanford University, CA 94305, USA
Neuroreport 12:299-307. 2001..These results indicate dyslexia may be characterized in childhood by disruptions in the neural bases of both phonological and orthographic processes important for reading... - What is the mechanism for fluency in successive recognition?R A Poldrack
Department of Psychology, Stanford University, CA 94305 2130 USA
Acta Psychol (Amst) 98:167-81. 1998..One possible mechanism for fluency in recognition may be based upon reductions in the orientation of attention that accompany item repetition... - Material-specific lateralization in the medial temporal lobe and prefrontal cortex during memory encodingA J Golby
Department of Radiology, Stanford University, Stanford, California 94305, USA
Brain 124:1841-54. 2001..Scenes and faces resulted in approximately symmetrical activation in both regions. The data indicate that the lateralization of encoding processes is determined by the verbalizability of stimuli... - Relations between the neural bases of dynamic auditory processing and phonological processing: evidence from fMRIR A Poldrack
MGH-NMR Center and Harvard Medical School, Charlestown, MA 02129, USA
J Cogn Neurosci 13:687-97. 2001..These results directly demonstrate that a subset of the left inferior frontal regions involved in phonological processing is also sensitive to transient acoustic features within the range of comprehensible speech... - The relationship between skill learning and repetition priming: experimental and computational analysesR A Poldrack
Department of Psychology, University of Illinois at Urbana Champaign, USA
J Exp Psychol Learn Mem Cogn 25:208-35. 1999..The experimental and computational results are interpreted as suggesting that skill learning and priming should be viewed as 2 aspects of a single incremental learning mechanism... - Can the cerebral metabolic rate of oxygen be estimated with near-infrared spectroscopy?D A Boas
Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
Phys Med Biol 48:2405-18. 2003..A more precise estimate of the flow-consumption ratio will require better estimates of the model parameters or flow information, as can be provided by combining NIRS with fMRI... - Cortical and subcortical contributions to Stop signal response inhibition: role of the subthalamic nucleusAdam R Aron
Department of Psychology, Brain Research Institute, University of California, Los Angeles, California 90095, USA
J Neurosci 26:2424-33. 2006..Future research is required to establish whether Stop-signal inhibition could be implemented via a direct functional neuroanatomic projection between IFC and STN (a "hyperdirect" pathway)... - Altered brain activation in dorsolateral prefrontal cortex in adolescents and young adults at genetic risk for schizophrenia: an fMRI study of working memoryLarry J Seidman
Harvard Medical School, Department of Psychiatry, Massachusetts Mental Health Center Public Psychiatry Division, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
Schizophr Res 85:58-72. 2006..Because substantially less is known about these phenotypes in adolescent subjects we sought to demonstrate that young relatives of persons with schizophrenia manifest impaired WM and altered prefrontal activation... - Elaborative verbal encoding and altered anterior parahippocampal activation in adolescents and young adults at genetic risk for schizophrenia using FMRIHeidi W Thermenos
Harvard Medical School, Massachusetts Mental Health Center in the Division of Public Psychiatry, Department of Psychiatry, Beth Israel Deaconess Medical Center, Boston, USA
Biol Psychiatry 61:564-74. 2007..We used functional magnetic resonance imaging (fMRI) to assess brain activity in the MTL during novel and repeated word-pair encoding... - The neural basis of loss aversion in decision-making under riskSabrina M Tom
Department of Psychology, University of California Los Angeles UCLA, Franz Hall, Box 951563, Los Angeles, CA 90095 1563, USA
Science 315:515-8. 2007..Finally, individual differences in behavioral loss aversion were predicted by a measure of neural loss aversion in several regions, including the ventral striatum and prefrontal cortex... - Diffusion tensor imaging of the superior longitudinal fasciculus and working memory in recent-onset schizophreniaKatherine H Karlsgodt
Department of Psychology, University of California, Los Angeles, California 90095 1563, USA
Biol Psychiatry 63:512-8. 2008.... - Selective amplification of stimulus differences during categorical processing of speechRajeev D S Raizada
Institute for Learning and Brain Sciences, University of Washington, Box 357988, Seattle, WA 98195, USA
Neuron 56:726-40. 2007..Selective amplification serves to emphasize key stimulus differences, thereby shaping perceptual categories. The approach presented here provides a quantitative way to measure the degree to which such processing is taking place... 
Neural substrates for reversing stimulus-outcome and stimulus-response associationsGui Xue
Foundation for Psychocultural Research University of California, Los Angeles Center for Culture, Brain and Development, University of California, Los Angeles, California 90095, USA
J Neurosci 28:11196-204. 2008..The later increase of right ventral lateral prefrontal cortex and caudate for reversal of stimulus-outcome associations suggests their importance in outcome reversal learning in the face of interference...- Selective corticostriatal dysfunction in schizophrenia: examination of motor and cognitive skill learningKarin Foerde
Department of Psychology, University of California Los Angeles, Los Angeles, CA, USA
Neuropsychology 22:100-9. 2008..In contrast, patients were not impaired at learning on the SRT relative to controls, suggesting that patients with schizophrenia may have dysfunction in a specific corticostriatal subcircuit... - The neural substrates of visual perceptual learning of words: implications for the visual word form area hypothesisGui Xue
Department of Psychology, University of Southern California, Seely G Mudd 501, Los Angeles, CA 90089 161, USA
J Cogn Neurosci 19:1643-55. 2007..These results confirm our conjecture that the VWFA is not dedicated to words, and visual expertise acquired with training reduces rather than increases its activity... - Dissociable controlled retrieval and generalized selection mechanisms in ventrolateral prefrontal cortexDavid Badre
Department of Psychology and Neurosciences Program, Stanford University, Stanford, California 94305, USA
Neuron 47:907-18. 2005..Distinct PFC mechanisms mediate top-down retrieval and postretrieval selection... - Long-term test-retest reliability of functional MRI in a classification learning taskAdam R Aron
Department of Psychology, Franz Hall Box 951563, University of California, Los Angeles, CA 90095, USA
Neuroimage 29:1000-6. 2006..We conclude that fMRI can have high long-term test-retest reliability, making it suitable as a biomarker for brain development and neurodegeneration... - The neural correlates of motor skill automaticityRussell A Poldrack
Department of Psychology, University of California, Los Angeles, Los Angeles, California 90095 1563, USA
J Neurosci 25:5356-64. 2005.... - Imaging phonology without print: assessing the neural correlates of phonemic awareness using fMRITami Katzir
Harvard Graduate School of Education, Cambridge, MA 02138, USA
Neuroimage 27:106-15. 2005..These findings suggest that phonological processing that is not mediated by print relies primarily on frontal language processing areas among skilled readers... - Functional neuroanatomy of working memory in adults with attention-deficit/hyperactivity disorderEve M Valera
Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02129, USA
Biol Psychiatry 57:439-47. 2005..The objective of this study was to examine neural functioning in ADHD adults during performance on a verbal working memory task... - The effect of working memory performance on functional MRI in schizophreniaHeidi W Thermenos
Harvard Medical School, Department of Psychiatry, Massachusetts Mental Health Center, Boston, MA 02115, USA
Schizophr Res 74:179-94. 2005..We report functional magnetic resonance imaging (fMRI) data comparing subjects with schizophrenia and healthy controls performing a 2-back working memory (WM) task, addressing the effects of task performance... - Medial temporal and prefrontal lobe activation during verbal encoding following glucose ingestion in schizophrenia: A pilot fMRI studyWilliam S Stone
Department of Psychiatry at Massachusetts Mental Health Center, Harvard Medical School, USA
Neurobiol Learn Mem 83:54-64. 2005.... - How do memory systems interact? Evidence from human classification learningRussell A Poldrack
Department of Psychology and Brain Research Institute, UCLA, Los Angeles, CA 90095, USA
Neurobiol Learn Mem 82:324-32. 2004..These results suggest that memory system interactions may reflect multiple mechanisms that combine to optimize behavior based on experience... - The cognitive neuroscience of response inhibition: relevance for genetic research in attention-deficit/hyperactivity disorderAdam R Aron
Department of Psychology and Brain Research Institute, University of California, Los Angeles, California 90095, USA
Biol Psychiatry 57:1285-92. 2005..Moreover, a dissection of response inhibition into more basic components such as rule maintenance, vigilance, and target detection may provide yet better targets for association with genes for neuromodulation and brain development... - Automatic independent component labeling for artifact removal in fMRIJussi Tohka
Institute of Signal Processing, Tampere University of Technology, Tampere, Finland
Neuroimage 39:1227-45. 2008..We conclude that automatic ICA-based denoising offers a potentially useful approach to improve the quality of fMRI data and consequently increase the accuracy of the statistical analysis of these data... - Neural deficits in children with dyslexia ameliorated by behavioral remediation: evidence from functional MRIElise Temple
Program in Neuroscience, Stanford University, Stanford, CA 94305, USA
Proc Natl Acad Sci U S A 100:2860-5. 2003.... - Competition among multiple memory systems: converging evidence from animal and human brain studiesRussell A Poldrack
Department of Psychology and Brain Research Institute, Franz Hall, University of California at Los Angeles, PO Box 951563, Los Angeles, CA 90095 1563, USA
Neuropsychologia 41:245-51. 2003..g. basolateral amygdala) and activity of neocortical brain regions involved in top-down response selection... - Automaticity in motor sequence learning does not impair response inhibitionJessica R Cohen
Department of Psychology, University of California, Los Angeles, Los Angeles, California 90095 1563, USA
Psychon Bull Rev 15:108-15. 2008..These results demonstrate that the ability to inhibit a motor response does not decrease with automaticity, suggesting that some aspects of automatic behavior are not ballistic... - Sequence learning: what's the hippocampus to do?Russell A Poldrack
Department of Psychology and Brain Research Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA
Neuron 37:891-3. 2003..A brain imaging study by Schendan et al., in this issue of Neuron, provides direct evidence of medial temporal lobe activation during implicit learning of motor sequences... - Inhibition and the right inferior frontal cortexAdam R Aron
Department of Experimental Psychology, Downing Street, University of Cambridge, Cambridge CB2 3EB, UK
Trends Cogn Sci 8:170-7. 2004..Future research should investigate the generality of this proposed inhibitory function to other task domains, and its interaction within a wider network... - Secondary-task effects on classification learningKarin Foerde
Department of Psychology, University of California, Los Angeles, California 90095 1563, USA
Mem Cognit 35:864-74. 2007.... - Category learning and the memory systems debateRussell A Poldrack
Department of Psychology, UCLA, Los Angeles, CA 90095 1563, USA
Neurosci Biobehav Rev 32:197-205. 2008.... - Triangulating a cognitive control network using diffusion-weighted magnetic resonance imaging (MRI) and functional MRIAdam R Aron
Department of Psychology, University of California San Diego, La Jolla, California 92093, USA
J Neurosci 27:3743-52. 2007..The results also demonstrate a three-way functional-anatomical network in the right hemisphere that could either brake or completely stop responses... - Modulation of competing memory systems by distractionKarin Foerde
Department of Psychology and Brain Research Institute, University of California, Los Angeles, CA 90095-1563, USA
Proc Natl Acad Sci U S A 103:11778-83. 2006.... - Construction of a 3D probabilistic atlas of human cortical structuresDavid W Shattuck
Laboratory of Neuro Imaging, Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, 635 Charles Young Drive South, NRB1, Suite 225, Los Angeles, CA 90095, USA
Neuroimage 39:1064-80. 2008....