Research Topics
| Alex MartinSummaryAffiliation: National Institutes of Health Country: USA Publications
| Collaborators
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Detail Information
Publications
Functional but not structural changes associated with learning: an exploration of longitudinal voxel-based morphometry (VBM)Adam G Thomas
Functional MRI Facility, NIMH, Bethesda, MD, USA
Neuroimage 48:117-25. 2009....- Sources of group differences in functional connectivity: an investigation applied to autism spectrum disorderTyler B Jones
Laboratory of Brain and Cognition, National Institute of Mental Health NIH, Bethesda, MD 20892, USA
Neuroimage 49:401-14. 2010..These findings suggest that the estimate of disrupted functional connectivity in ASD is likely driven by differences in task-unrelated neuronal fluctuations... - Neural systems supporting lexical search guided by letter and semantic category cues: a self-paced overt response fMRI study of verbal fluencyRasmus M Birn
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, MD 20892, USA
Neuroimage 49:1099-107. 2010..They also provide strong evidence that verbal fluency can be successfully evaluated in the MR environment using overt, self-paced, responses... 
The representation of object concepts in the brainAlex Martin
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, Maryland 20892 1366, USA
Annu Rev Psychol 58:25-45. 2007..However, some property-based regions seem to show a categorical organization, thus providing evidence consistent with category-based, domain-specific formulations as well...- The selectivity and functional connectivity of the anterior temporal lobesW Kyle Simmons
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, MD 20892 1366, USA
Cereb Cortex 20:813-25. 2010..Rather than serving as a domain-general semantic hub, the ATLs work in unison with the social cognition system to support learning facts about others... - Fractionation of social brain circuits in autism spectrum disordersStephen J Gotts
Section on Cognitive Neuropsychology, Laboratory of Brain and Cognition, National Institute of Mental Health NIMH, National Institutes of Health, Bethesda, MD 20892, USA
Brain 135:2711-25. 2012..This selective pattern was independently obtained for correlations with measures of social symptom severity, implying a fractionation of the social brain in autism spectrum disorders at the level of whole circuits... - Diminished sensitivity to sad facial expressions in high functioning autism spectrum disorders is associated with symptomatology and adaptive functioningGregory L Wallace
Laboratory of Brain and Cognition, National Institute of Mental Health, 10 Center Drive, Room 4C104, MSC 1366, Bethesda, MD 20892 1366, USA
J Autism Dev Disord 41:1475-86. 2011..Controlling for this overall group difference revealed particularly diminished sensitivity to sad facial expressions in ASD, which was uniquely correlated with ratings of autism-related behavior and adaptive functioning... - Lateralized spatial and object memory encoding in entorhinal and perirhinal corticesPatrick S F Bellgowan
Section on Cognitive Neuropsychology, NIMH, Bethesda, Maryland 20892, USA
Learn Mem 16:433-8. 2009..object processing. Our findings suggest that this process-specific distinction may be expressed in the human brain as a hemispheric division of labor... - Broad and narrow conceptual tuning in the human frontal lobesStephen J Gotts
Laboratory of Brain and Cognition, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA
Cereb Cortex 21:477-91. 2011..The combination of broad and narrow conceptual tuning within prefrontal cortex may support flexible selection, retrieval, and classification of objects at different levels of categorical abstraction... - Understanding animate agents: distinct roles for the social network and mirror systemThalia Wheatley
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, Maryland, USA
Psychol Sci 18:469-74. 2007..Although observing and imagining the moving shapes engaged the mirror system, only activation of the social network was modulated by animacy... - Distinct cortical correlates of autistic versus antisocial traits in a longitudinal sample of typically developing youthGregory L Wallace
Laboratory of Brain and Cognition, National Institute of Mental Health, NIH, Bethesda, Maryland 20892 1366, USA
J Neurosci 32:4856-60. 2012..These results support the dimensional view of psychopathology and provide neural signatures that can serve as informative endophenotypes for future genetic studies... - Spontaneous resting-state BOLD fluctuations reveal persistent domain-specific neural networksW Kyle Simmons
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, Maryland, USA
Soc Cogn Affect Neurosci 7:467-75. 2012..Here, we show that the 'social' and 'tool' neural networks are maintained even when subjects are not engaged in social- and tool-related information processing, and so constitute intrinsic domain-specific neural networks... - Characteristic cortical thickness patterns in adolescents with autism spectrum disorders: interactions with age and intellectual ability revealed by canonical correlation analysisMasaya Misaki
Laboratory of Brain and Cognition, National Institute of Mental Health, National Institute of Health, Bethesda, MD, USA USA
Neuroimage 60:1890-901. 2012..We discuss these findings vis-à-vis prior results obtained utilizing univariate methods... - Age-related temporal and parietal cortical thinning in autism spectrum disordersGregory L Wallace
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, MD 20892 1366, USA
Brain 133:3745-54. 2010..e. greater thinning) may be characteristic of these disorders... - A neural system for learning about object functionJill Weisberg
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, MD 20892, USA
Cereb Cortex 17:513-21. 2007..quot;.. - Species-specific calls activate homologs of Broca's and Wernicke's areas in the macaqueRicardo Gil-da-Costa
National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland 20892, USA
Nat Neurosci 9:1064-70. 2006.... - Impaired visual scanning and memory for faces in high-functioning autism spectrum disorders: it's not just the eyesJoseph Snow
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, Maryland 20892, USA
J Int Neuropsychol Soc 17:1021-9. 2011..e., eyes, nose, and mouth). We concluded that ASD individuals have a domain-specific memory impairment for faces relative to mechanical objects and that this impairment may be related to abnormal scanning during encoding... - Grounding object concepts in perception and action: evidence from fMRI studies of toolsMichael S Beauchamp
Section on Cognitive Neuropsychology, Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, 20892 1366 MD, USA
Cortex 43:461-8. 2007..We describe a simple model that explains how low-level receptive field properties like those known to exist in area MT/V5 could give rise to the high-level category-related representations observed in functional imaging experiments... - The anterior temporal lobes and the functional architecture of semantic memoryW Kyle Simmons
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, Maryland 20892 1366, USA
J Int Neuropsychol Soc 15:645-9. 2009..Here, we review neuropsychological and neuroimaging studies that bear on these three accounts and offer suggestions for future research to elucidate the roles of the ATLs in semantic memory... - The neural basis of implicit moral attitude--an IAT study using event-related fMRIQian Luo
Unit on Affective Cognitive Neuroscience, Mood and Anxiety Program, National Institute of Mental Health, Department of Health and Human Services, 15K North Drive, Room 206, MSC 2670, Bethesda, MD 20892, USA
Neuroimage 30:1449-57. 2006..The functional contributions of these regions in moral reasoning are discussed... - Trouble at rest: how correlation patterns and group differences become distorted after global signal regressionZiad S Saad
Scientific and Statistical Computing Core, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892, USA
Brain Connect 2:25-32. 2012..We touch on the need for careful accounting of nuisance parameters when making group comparisons of correlation maps... - Repetition priming across the adult lifespan--the long and short of itCheri L Wiggs
Laboratory of Brain and Cognition, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA
Neuropsychol Dev Cogn B Aging Neuropsychol Cogn 13:308-25. 2006..These findings support the assertion that repetition priming and explicit memory reflect the operation of distinct systems, and that these systems may undergo different rates of change in aging... 
Facial emotion recognition in autism spectrum disorders: a review of behavioral and neuroimaging studiesMadeline B Harms
Laboratory of Brain and Cognition, National Institute of Mental Health, 10 Center Drive, Room 4C104, MSC 1366, Bethesda, MD 20892 1366, USA
Neuropsychol Rev 20:290-322. 2010....- A wavelet-based method for measuring the oscillatory dynamics of resting-state functional connectivity in MEGAvniel Singh Ghuman
Laboratory of Brain and Cognition, National Institute of Mental Health, USA
Neuroimage 56:69-77. 2011..This spectral resting-state functional connectivity imaging method may allow us to better understand the oscillatory dynamics underlying intrinsic functional connectivity in the human brain... - Parallel visual motion processing streams for manipulable objects and human movementsMichael S Beauchamp
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, MD 20892, USA
Neuron 34:149-59. 2002..Specificity for different types of complex motion (in combination with visual form) may be an organizing principle in lateral temporal cortex... - Experience-dependent modulation of category-related cortical activityLinda L Chao
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, MD, USA
Cereb Cortex 12:545-51. 2002..Together, these findings suggest that category-related activations reflect the retrieval of information about category-specific features and attributes... - A common neural substrate for perceiving and knowing about colorW Kyle Simmons
Department of Psychology, Emory University, USA
Neuropsychologia 45:2802-10. 2007.... - Unraveling multisensory integration: patchy organization within human STS multisensory cortexMichael S Beauchamp
Laboratory of Brain and Cognition, National Institutes of Health, Bethesda, Maryland, USA
Nat Neurosci 7:1190-2. 2004..These studies suggest a functional architecture in which information from different modalities is brought into close proximity via a patchy distribution of inputs, followed by integration in the intervening cortex... - FMRI responses to video and point-light displays of moving humans and manipulable objectsMichael S Beauchamp
National Institute of Mental Health, LBC, National Institutes of Health, Bethesda, MD 20892 1366, USA
J Cogn Neurosci 15:991-1001. 2003..Whereas the STS responded strongly to point-light displays, it showed an even larger response to video displays, suggesting that the STS integrates form, color, and motion information... - Integration of auditory and visual information about objects in superior temporal sulcusMichael S Beauchamp
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, MD 20892 USA
Neuron 41:809-23. 2004..We suggest that pSTS/MTG is specialized for integrating different types of information both within modalities (e.g., visual form, visual motion) and across modalities (auditory and visual)... - Shades of Déjerine--forging a causal link between the visual word form area and readingAlex Martin
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, Maryland 20892, USA
Neuron 50:173-5. 2006..quot; In this issue of Neuron, Gaillard and colleagues offer evidence consistent with Déjerine's proposal and provide new insights to the functional role of the "visual word form area.".. - Face adaptation without a faceAvniel Singh Ghuman
Laboratory of Brain and Cognition, National Institute of Mental Health, National Institutes of Health, 10 Center Drive, Bethesda, MD 20892 1366, USA
Curr Biol 20:32-6. 2010..More generally, these results reveal that high-level perceptual adaptation can occur when the property or features being adapted are automatically inferred rather than perceived in the adapting stimulus... - Toward an evolutionary perspective on conceptual representation: species-specific calls activate visual and affective processing systems in the macaqueRicardo Gil-da-Costa
National Institute on Deafness and Other Communication Disorders, National Institute of Mental Health, and Positron Emission Tomography Department, Clinical Center, National Institutes of Health, Bethesda, MD 20892, USA
Proc Natl Acad Sci U S A 101:17516-21. 2004..These findings shed light on the evolutionary precursors of conceptual representation in humans, suggesting that monkeys and humans have a common neural substrate for representing object concepts... - Brief report: Further evidence for inner speech deficits in autism spectrum disordersGregory L Wallace
Laboratory of Brain and Cognition, National Institute of Mental Health, 10 Center Drive, MSC 1366, Building 10, Room 4C104, Bethesda, MD 20892 1366, USA
J Autism Dev Disord 39:1735-9. 2009..These findings suggest that diminished inner speech usage among individuals with high functioning autism spectrum disorders (relative to TD controls) may contribute to executive dysfunction associated with these disorders... - Improved BOLD detection in the medial temporal region using parallel imaging and voxel volume reductionPatrick S F Bellgowan
Section on Cognitive Neuropsychology, NIMH, 10 Center Drive, 10 Center Dr, Bldg 10 room 4C104, NIH, Bethesda, MD 20892 1366, USA
Neuroimage 29:1244-51. 2006..These results demonstrate that BOLD investigation of anterior MTL function can be enhanced by decreasing voxel size but only in combination with the SNR gained by using the 16-channel head coil system... - Adaptive behavior ratings correlate with symptomatology and IQ among individuals with high-functioning autism spectrum disordersLauren Kenworthy
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, MD, USA
J Autism Dev Disord 40:416-23. 2010.... - Threat, domain-specificity and the human amygdalaJiongjiong Yang
Laboratory of Brain and Cognition, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA
Neuropsychologia 50:2566-72. 2012..Thus, our findings suggest two circuits underpinning an automatic response to threatening stimuli; an amygdala-based circuit for animate entities, and a cortex-based circuit for responding to manmade, manipulable objects... - Automatic priming of semantically related words reduces activity in the fusiform gyrusThalia Wheatley
Laboratory of Brain and Cognition, National Institutes of Mental Health, National Institutes of Health, 10 Center Drive MSC 1366, Bethesda, MD 20892, USA
J Cogn Neurosci 17:1871-85. 2005.... - Using PET H2O15 brain imaging to study the functional-anatomical correlates of non-human primate communicationRicardo Gil-da-Costa
National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, USA
Methods 38:221-6. 2006..Methods for acquiring and analyzing PET data to identify significant regions of brain activity in single animals are also presented... - Modulation of neural activity during object naming: effects of time and practiceMiranda van Turennout
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, MD, USA
Cereb Cortex 13:381-91. 2003....