Research Topics
| C RanganathSummaryAffiliation: University of California Country: USA Publications
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Detail Information
Publications
Coding of objects in the prefrontal cortex in monkeys and humansGregor Rainer
Max Planck Institute for Biological Cybernetics, Tubingen, Germany
Neuroscientist 8:6-11. 2002..At a larger level, the convergence of findings from monkey and human studies demonstrates that concurrent investigation of scientific questions in both species can be a fruitful approach and promises to lead to future advances...- Neural mechanisms of expert skills in visual working memoryChristopher D Moore
Department of Psychology, Princeton University, New Jersey 08540, USA
J Neurosci 26:11187-96. 2006.... - Category-specific modulation of inferior temporal activity during working memory encoding and maintenanceCharan Ranganath
Center for Neuroscience and Department of Psychology, University of California at Davis, 1544 Newton Ct, Davis, CA 95616, USA
Brain Res Cogn Brain Res 20:37-45. 2004..These results are consistent with the view that visual working memory encoding and maintenance processes are implemented through modulation of inferior temporal activity by prefrontal cortex... - The cognitive neuroscience of memory function and dysfunction in schizophreniaCharan Ranganath
Center for Neuroscience and Department of Psychology, University of California at Davis, Davis, CA 95618, USA
Biol Psychiatry 64:18-25. 2008..A brief summary of research on episodic memory in schizophrenia is presented to provide a context for investigating item-specific and relational memory processes. Candidate brain regions are also discussed... - Inferior temporal, prefrontal, and hippocampal contributions to visual working memory maintenance and associative memory retrievalCharan Ranganath
Center for Neuroscience and Department of Psychology, University of California at Davis, Davis, California 95616, USA
J Neurosci 24:3917-25. 2004.... - The 3-D prefrontal cortex: Hemispheric asymmetries in prefrontal activity and their relation to memory retrieval processesCharan Ranganath
Center for Neuroscience and Department of Psychology, University of California Davis, 95616, USA
J Cogn Neurosci 16:903-7. 2004.... - Directing the mind's eye: prefrontal, inferior and medial temporal mechanisms for visual working memoryCharan Ranganath
Center for Neuroscience and Department of Psychology, University of California at Davis, 1544 Newton Ct, Davis, CA 95616, USA
Curr Opin Neurobiol 15:175-82. 2005.... - Doubts about double dissociations between short- and long-term memoryCharan Ranganath
Center for Neuroscience, University of California at Davis, CA 95616, USA
Trends Cogn Sci 9:374-80. 2005..We consider alternative ways to explain the neural mechanisms of memory across different retention intervals... - Dissociable correlates of two classes of retrieval processing in prefrontal cortexCharan Ranganath
Center for Neuroscience, 1544 Newton Ct, University of California at Davis, Davis, CA 95616, USA
Neuroimage 35:1663-73. 2007..Results from this study are consistent with the idea that different PFC subregions implement distinct, but complementary processes that collectively support accurate episodic memory judgments... - Working memory maintenance contributes to long-term memory formation: neural and behavioral evidenceCharan Ranganath
Center for Neuroscience and Department of Psychology, University of California at Davis, CA 95616, USA
J Cogn Neurosci 17:994-1010. 2005.... - Functional connectivity with the hippocampus during successful memory formationCharan Ranganath
Department of Psychology and Center for Neuroscience, University of California at Davis, Davis, CA 95616, USA
Hippocampus 15:997-1005. 2005..These findings demonstrate that successful memory formation is associated with transient increases in cortico-hippocampal interaction... - Working memory for visual objects: complementary roles of inferior temporal, medial temporal, and prefrontal cortexC Ranganath
Center for Neuroscience and Department of Psychology, University of California at Davis, 1544 Newton Court, Davis, CA 95616, USA
Neuroscience 139:277-89. 2006.... - Dissociable correlates of recollection and familiarity within the medial temporal lobesCharan Ranganath
Center for Neuroscience and Department of Psychology, University of California at Davis, 1544 Newton Ct, Davis, CA 95616, USA
Neuropsychologia 42:2-13. 2004..Collectively, these results support the view that different subregions within the MTL memory system implement unique encoding processes that differentially support familiarity and recollection... - Neural mechanisms for detecting and remembering novel eventsCharan Ranganath
Center for Neuroscience and Department of Psychology, University of California, Davis, 1544 Newton Ct, Davis, California 95616, USA
Nat Rev Neurosci 4:193-202. 2003..Here, we review this research and suggest how changes in neural processing at the cellular, synaptic and network levels allow us to detect, attend to and subsequently remember the occurrence of a novel event... - Prefrontal activity associated with working memory and episodic long-term memoryCharan Ranganath
Department of Psychology, Center for Neuroscience, University of California, 1544 Newton Ct, Davis, CA 95616, USA
Neuropsychologia 41:378-89. 2003..These results support the view that the same prefrontal regions implement reflective processes that support both WM and LTM... - A unified framework for the functional organization of the medial temporal lobes and the phenomenology of episodic memoryCharan Ranganath
Center for Neuroscience and Department of Psychology, University of California at Davis, Davis, California 95618, USA
Hippocampus 20:1263-90. 2010.... - Brain waves following remembered faces index conscious recollectionK A Paller
Department of Psychology, Northwestern University, Evanston, IL 60208 2710, USA
Brain Res Cogn Brain Res 7:519-31. 1999.... - Medial temporal lobe activity associated with active maintenance of novel informationC Ranganath
Helen Wills Neuroscience Institute and Department of Psychology, University of California, Berkeley, Berkeley, CA 94720, USA
Neuron 31:865-73. 2001..Our results reveal the importance of medial temporal lobe regions for the active maintenance of novel information in the absence of perceptual stimulation... - Imaging recollection and familiarity in the medial temporal lobe: a three-component modelRachel A Diana
Center for Neuroscience, 1544 Newton Court, Davis, CA 95618, USA
Trends Cogn Sci 11:379-86. 2007..We highlight several predictions for future imaging studies that follow from the BIC model... - Functional connectivity with anterior cingulate and orbitofrontal cortices during decision-makingM X Cohen
Department of Epileptology, University of Bonn, Germany
Brain Res Cogn Brain Res 23:61-70. 2005.... - Behavioral and neural predictors of upcoming decisionsM X Cohen
University of Bonn, Bonn, Germany
Cogn Affect Behav Neurosci 5:117-26. 2005..These findings provide a novel link between behavior and neural activity by demonstrating that value functions are manifested both in adjustments in behavioral strategies and in the neural activity that accompanies those adjustments... - The eyes have it: hippocampal activity predicts expression of memory in eye movementsDeborah E Hannula
Center for Neuroscience, University of California, Davis, 1544 Newton Court, Davis, CA 95618, USA
Neuron 63:592-9. 2009.... - The effects of unitization on familiarity-based source memory: testing a behavioral prediction derived from neuroimaging dataRachel A Diana
Department of Psychology, University of California, Davis, CA, USA
J Exp Psychol Learn Mem Cogn 34:730-40. 2008..These findings suggest that familiarity can contribute to source recognition and that its contribution depends critically on the way item and source information are initially processed... - Prefrontal and medial temporal lobe activity at encoding predicts temporal context memoryLucas J Jenkins
Center for Neuroscience and Department of Psychology, University of California, Davis, California 95616, USA
J Neurosci 30:15558-65. 2010..These results highlight MTL and PFC contributions to temporal memory at the time of encoding and suggest a particular role for the rostrolateral PFC in encoding coarse temporal context... - White matter changes compromise prefrontal cortex function in healthy elderly individualsChristine Wu Nordahl
University of California at Davis, Sacramento, CA 95817, USA
J Cogn Neurosci 18:418-29. 2006..These results suggest that disruption of white matter tracts, especially within the PFC, may be a mechanism for age-related changes in memory functioning... - Reinforcement learning signals predict future decisionsMichael X Cohen
Department of Epileptology and Center for Mind and Brain, University of Bonn, 53105 Bonn, Germany
J Neurosci 27:371-8. 2007..These findings provide novel evidence that humans engage a reinforcement learning process to adjust representations of competing decision options... - Reward expectation modulates feedback-related negativity and EEG spectraMichael X Cohen
Department of Epilepsy and Center for Life and Brain, Sigmund Freud Str 25, Bonn 53105, Germany
Neuroimage 35:968-78. 2007..These findings suggest that the neural mechanisms of feedback processing may differ between wins and losses... - Perirhinal cortex supports encoding and familiarity-based recognition of novel associationsA Logan Haskins
Department of Psychology, University of California at Davis, Davis, CA 95618, USA
Neuron 59:554-60. 2008..These results explain the discrepancy in the literature by showing that novel associations can be encoded in a unitized manner, thereby allowing PRc to support associative recognition based on familiarity... - High-resolution multi-voxel pattern analysis of category selectivity in the medial temporal lobesRachel A Diana
Center for Neuroscience, University of California, Davis, CA 95616, USA
Hippocampus 18:536-41. 2008..The results indicate that regions within the medial temporal lobe may support distinct functions, and that the PHc appears to be particularly sensitive to category-level information... - Medial temporal lobe activity predicts successful relational memory bindingDeborah E Hannula
Center for Neuroscience, University of California, Davis, California 95618, USA
J Neurosci 28:116-24. 2008..These results indicate that the hippocampus and related MTL structures contribute to successful encoding and retrieval of relational information in visual short-term memory... - CNTRICS final task selection: long-term memoryJohn D Ragland
Department of Psychiatry and Behavioral Sciences, University of California at Davis, Sacramento, CA 95817, USA
Schizophr Bull 35:197-212. 2009..This discussion is followed by each nominating authors' description of their selected task paradigm, ending with some thoughts about future directions... - The dorsolateral prefrontal cortex contributes to successful relational memory encodingLinda J Murray
Center for Neuroscience and Department of Psychology, University of California at Davis, Davis, California 95616, USA
J Neurosci 27:5515-22. 2007..These results support the view that the DLPFC may contribute to LTM through its role in active processing of relationships during encoding, whereas the VLPFC may have a more general role in promoting successful LTM formation... - Prefrontal activation deficits during episodic memory in schizophreniaJohn D Ragland
University of California Davis Imaging Research Center, 4701 X St, Sacramento, CA 95817, USA
Am J Psychiatry 166:863-74. 2009..This quantitative meta-analysis of functional imaging studies of episodic encoding and retrieval tests the prediction that these deficits are most consistently associated with dysfunction in the prefrontal cortex... - Different mechanisms of episodic memory failure in mild cognitive impairmentChristine Wu Nordahl
Center for Neuroscience, University of California at Davis, Davis, CA, USA
Neuropsychologia 43:1688-97. 2005..Although both syndromes are associated with episodic memory deficits, CVD is additionally associated with working memory and executive control deficits... - Medial temporal lobe activity during source retrieval reflects information type, not memory strengthRachel A Diana
Center for Neuroscience, University of California, Davis, CA 95618, USA
J Cogn Neurosci 22:1808-18. 2010.... - Dorsolateral prefrontal cortex promotes long-term memory formation through its role in working memory organizationRobert S Blumenfeld
Center for Neuroscience, Department of Psychology, University of California, Davis, California 95616, USA
J Neurosci 26:916-25. 2006..These results support the view that the DLPFC contributes to LTM formation through its role in organization of information in WM... - Individual differences in extraversion and dopamine genetics predict neural reward responsesMichael X Cohen
Department of Epileptology, University of Bonn, 53115 Bonn, Germany Center for Neuroscience, University of California, Davis, CA 95616, USA
Brain Res Cogn Brain Res 25:851-61. 2005..These results demonstrate a link between stable differences in personality, genetics, and brain functioning... - Neural correlates of person recognitionKen A Paller
Department of Psychology, Northwestern University, Evanston, Illinois 60208, USA
Learn Mem 10:253-60. 2003.... - Category expectation modulates baseline and stimulus-evoked activity in human inferotemporal cortexAmrita M Puri
Center for Mind and Brain, University of California, Davis, 95618, USA
Brain Res 1301:89-99. 2009.... - Lag-sensitive repetition suppression effects in the anterior parahippocampal gyrusCraig J Brozinsky
Psychology Department, University of California, Davis, California 95616, USA
Hippocampus 15:557-61. 2005..Our results demonstrate that activity in the human medial temporal cortex, like that of monkeys, exhibits repetition suppression effects that are sensitive to the length of the interval between repetitions... - The medial temporal lobe supports conceptual implicit memoryWei Chun Wang
Department of Psychology, University of California, Davis, Davis, CA 95616, USA
Neuron 68:835-42. 2010..These patient and imaging results converge to suggest that the PRc plays a critical role in conceptual implicit memory, and possibly conceptual processing in general... - Novelty effects on recollection and familiarity in recognition memoryMark M Kishiyama
Department of Psychology, University of California, Davis, California 95616, USA
Mem Cognit 31:1045-51. 2003..Thus, both processes benefit from stimulus novelty, but the extent to which recollection benefits from novelty depends on the encoding condition... - Testing a neurocomputational model of recollection, familiarity, and source recognitionKane W Elfman
Department of Psychology, University of California, Davis, CA 95616, USA
J Exp Psychol Learn Mem Cogn 34:752-68. 2008..The authors conducted 3 new behavioral source experiments that confirmed the model's prediction. The results demonstrate that the model provides a viable account of item and source recognition performance... - Dissociating familiarity from recollection in human recognition memory: different rates of forgetting over short retention intervalsAndrew P Yonelinas
Department of Psychology, University of California, Davis 95616, USA
Psychon Bull Rev 9:575-82. 2002..In agreement with the results from nonhuman species, the present results indicate that item familiarity decreases more rapidly than recollection over short retention intervals... - Effects of extensive temporal lobe damage or mild hypoxia on recollection and familiarityAndrew P Yonelinas
Department of Psychology, University of California, Davis, California 95616, USA
Nat Neurosci 5:1236-41. 2002..In sum, we found that the regions disrupted in mild hypoxia, such as the hippocampus, are centrally involved in conscious recollection, whereas the surrounding temporal lobe supports familiarity-based memory discrimination... - Recognition memory for source and occurrence: the importance of recollectionJoel R Quamme
Department of Psychology, University of California, Davis, California 95616, USA
Mem Cognit 30:893-907. 2002.... - Separating sensitivity from response bias: implications of comparisons of yes-no and forced-choice tests for models and measures of recognition memoryNeal E A Kroll
Department of Psychology, University of California, Davis 95616, USA
J Exp Psychol Gen 131:241-54. 2002..The results illustrate the pitfalls of using a single-component model to measure accuracy in tasks that reflect 2 or more underlying processes... - Developmental differences in medial temporal lobe function during memory encodingSimona Ghetti
Department of Psychology, University of California, Davis, California 95616, USA
J Neurosci 30:9548-56. 2010.... - Faces are special but not too special: spared face recognition in amnesia is based on familiarityMariam Aly
University of California, Department of Psychology, Davis, CA 95616, USA
Neuropsychologia 48:3941-8. 2010..In addition, the findings challenge material-general theories of memory, and suggest that both material and process are important determinants of memory performance in amnesia... - Recollection and familiarity: examining controversial assumptions and new directionsAndrew P Yonelinas
Department of Psychology, University of California, Davis, California 95616, USA
Hippocampus 20:1178-94. 2010.... - Memory variability is due to the contribution of recollection and familiarity, not to encoding variabilityJoshua D Koen
Department of Psychology, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
J Exp Psychol Learn Mem Cogn 36:1536-42. 2010..These results indicate that old item memory variability is due to the relative contribution of recollection and familiarity... - Recall and recognition in mild hypoxia: using covariance structural modeling to test competing theories of explicit memoryJoel R Quamme
Department of Psychology, University of California, Davis, CA 95616, USA
Neuropsychologia 42:672-91. 2004..The results support models of explicit memory in which recollection depends on the hippocampus and frontal lobes, whereas familiarity-based recognition relies on other brain regions... - Receiver operating characteristics (ROCs) in recognition memory: a reviewAndrew P Yonelinas
Department of Psychology, University of California, Davis, CA 95616, USA
Psychol Bull 133:800-32. 2007..The results indicate that there are at least 2 functionally distinct component/processes underlying recognition memory. In addition, the ROC results have various implications for how recognition memory performance should be measured... - Separating the brain regions involved in recollection and familiarity in recognition memoryAndrew P Yonelinas
Department of Psychology, University of California Davis, Davis, California 95616, USA
J Neurosci 25:3002-8. 2005..The results indicate that recollection and familiarity rely on different networks of brain regions and provide insights into the functional roles of different regions involved in episodic recognition memory... - Memory in the aging brain: doubly dissociating the contribution of the hippocampus and entorhinal cortexAndrew P Yonelinas
Department of Psychology, University of California, Davis, California 95616, USA
Hippocampus 17:1134-40. 2007.... - Moving beyond pure signal-detection models: comment on Wixted (2007)Colleen M Parks
Department of Psychology, University of California, Davis, CA 95616, USA
Psychol Rev 114:188-202; discussion 203-9. 2007..Although important challenges remain, hybrid models such as this provide a more useful framework within which to understand human memory than do pure signal-detection models... - Correlates of memory function in community-dwelling elderly: the importance of white matter hyperintensitiesChristopher I Petkov
Center for Neuroscience, University of California at Davis, 95616, USA
J Int Neuropsychol Soc 10:371-81. 2004..We conclude that WMH are an important pathological substrate that affects certain memory functions in normal individuals and those with mild memory loss and discuss how tasks associated with WMH may rely upon frontal lobe function... - Frontal brain activity during episodic and semantic retrieval: insights from event-related potentialsC Ranganath
Northwestern University, Department of Psychology, 2029 Sheridan Road, Evanston, IL 60208 2710, USA
J Cogn Neurosci 11:598-609. 1999..These findings support the notion that the right prefrontal cortex is engaged in the service of memory retrieval, particularly for episodic memories... - Aging effects on recollection and familiarity: the role of white matter hyperintensitiesColleen M Parks
Department of Psychology, University of Nevada, Las Vegas, NV 89154, USA
Neuropsychol Dev Cogn B Aging Neuropsychol Cogn 17:422-38. 2010.... - Bilateral thalamic lesions affect recollection- and familiarity-based recognition memory judgmentsMark M Kishiyama
Helen Wills Neuroscience Institute, University of California, Berkeley, CA 94728 3190, USA
Cortex 41:778-88. 2005..The results are in agreement with models indicating that the anteromedial thalamus is important for both recollection- and familiarity-based recognition memory... - Novelty enhancements in memory are dependent on lateral prefrontal cortexMark M Kishiyama
Helen Wills Neuroscience Institute, University of California, Berkeley, California 94720, USA
J Neurosci 29:8114-8. 2009..These results provide neuropsychological evidence supporting a key role for the lateral PFC in producing stimulus novelty advantages in memory... - Effect of unitization on associative recognition in amnesiaJoel R Quamme
Department of Psychology, Princeton University, Princeton, New Jersey 08540, USA
Hippocampus 17:192-200. 2007..The relevance of the results to the debate over the importance of the hippocampus in memory for associations is discussed... - Differential time-dependent effects of emotion on recollective experience and memory for contextual informationTali Sharot
Department of Psychology, New York University, 6 Washington Place Room 863, New York, NY 10003, USA
Cognition 106:538-47. 2008..The findings indicate that emotion slows the effects of forgetting on the recollective experience associated with studied events, without necessarily slowing the forgetting of specific contextual details of those events... - Prefrontal cortex and long-term memory encoding: an integrative review of findings from neuropsychology and neuroimagingRobert S Blumenfeld
Center for Neuroscience and Department of Psychology, University of California at Davis, CA, USA roblume ucdavis edu
Neuroscientist 13:280-91. 2007..Thus, dorsolateral and ventrolateral regions of the PFC may implement different control processes that support LTM formation in a complementary fashion... - Preliminary evidence that daily changes in frontal alpha asymmetry correlate with changes in affect in therapy sessionsJ P Rosenfeld
Department of Psychology, Northwestern University, Evanston, IL 60208 2710, USA
Int J Psychophysiol 23:137-41. 1996..Strong correlations were obtained, however, between asymmetry score and affect change score and, in particular, between asymmetry score and change in positive affect... - Dissociating perceptual and conceptual implicit memory in multiple sclerosis patientsDiana Blum
Department of Radiology, University of California, San Francisco, CA, USA
Brain Cogn 50:51-61. 2002..Moreover, the results indicate that perceptual implicit memory can be neurologically dissociated from conceptual implicit memory... - Effects of unilateral prefrontal lesions on familiarity, recollection, and source memoryAudrey Duarte
Helen Wills Neuroscience Institute, Berkeley, California 94720, USA
J Neurosci 25:8333-7. 2005..These findings suggest that the PFC plays a critical role in recognition memory based on familiarity as well as recollection. Furthermore, these results suggest that left PFC regions are critical for source recollection... - Content-specific activation during associative long-term memory retrievalPatrick Khader
Experimental and Biological Psychology, Philipps University, 35032 Marburg, Germany
Neuroimage 27:805-16. 2005..These results show that material-specific cortical networks are systematically activated during long-term memory retrieval that overlap with areas also activated by positions and faces during perceptual and working memory tasks... - The electrophysiology of memory: section II: clinical studies. Exploring human memory processes with event-related potentialsThomas Grunwald
Swiss Epilepsy Center, Zurich, Switzerland
Clin EEG Neurosci 38:1. 2007 - Working memory maintenance contributes to long-term memory formation: evidence from slow event-related brain potentialsPatrick Khader
Department of Psychology, Philipps University Marburg, Marburg, Germany
Cogn Affect Behav Neurosci 7:212-24. 2007..Together, these results are strongly consistent with the ideas that WM maintenance contributes to LTM formation and that this may occur through strengthening of stimulus-specific cortical memory traces... - Topography and dynamics of associative long-term memory retrieval in humansPatrick Khader
Philipps University Marburg, Germany
J Cogn Neurosci 19:493-512. 2007..The integrated results suggest that the neuronal dynamics of associative memory retrieval are equivalent for different types of associations, but that the structural basis is clearly content-specific... - Dissociable neural correlates for familiarity and recollection during the encoding and retrieval of picturesAudrey Duarte
Department of Molecular and Cellular Biology, University of California at Berkeley, 4143 Tolman Hall, Berkeley, CA 94720 5050, USA
Brain Res Cogn Brain Res 18:255-72. 2004..These results demonstrate that familiarity and recollection reflect the outcome of neurally distinct memory processes at both encoding and retrieval... - Intact recollection memory in high-performing older adults: ERP and behavioral evidenceAudrey Duarte
University of California at Berkeley, San Francisco 94121, USA
J Cogn Neurosci 18:33-47. 2006....
Research Grants
- Perirhinal Cortex and Associative MemoryCharan Ranganath; Fiscal Year: 2009..Such memory disorders can have a devastating effect on patients' quality of life. Research clarifying the basic neural mechanisms of memory can lead to improved diagnosis and treatment of these disorders. ..
- Fractionating Prefrontal Contributions to MemoryCharan Ranganath; Fiscal Year: 2010..The proposed research can lead to new approaches to the diagnosis and treatment of memory disorders. ..
- Perirhinal Cortex and Associative MemoryAndrew P Yonelinas; Fiscal Year: 2010..Such memory disorders can have a devastating effect on patients'quality of life. Research clarifying the basic neural mechanisms of memory can lead to improved diagnosis and treatment of these disorders. ..
- Perirhinal Cortex and Associative MemoryCharan Ranganath; Fiscal Year: 2009..Such memory disorders can have a devastating effect on patients' quality of life. Research clarifying the basic neural mechanisms of memory can lead to improved diagnosis and treatment of these disorders. ..
- Fractionating Prefrontal Contributions to MemoryCharan Ranganath; Fiscal Year: 2009..Results from these studies will enable the development of a theory that characterizes, both cognitively and neurally, the processes implemented by specific prefrontal regions that relate to memory. ..
- Perirhinal Cortex and Associative MemoryCHARAN contact RANGANATH; Fiscal Year: 2011..Such memory disorders can have a devastating effect on patients'quality of life. Research clarifying the basic neural mechanisms of memory can lead to improved diagnosis and treatment of these disorders. ..