Chatterjee, Anjan

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Now showing 1 - 10 of 17
  • Publication
    Conceptual Representations of Action in the Lateral Temporal Cortex
    (2005-12-01) Kable, Joseph W; Thompson-Schill, Sharon L.; Kan, Irene P; Chatterjee, Anjan; Wilson, Ashley
    Retrieval of conceptual information from action pictures causes greater activation than from object pictures bilaterally in human motion areas (MT/MST) and nearby temporal regions. By contrast, retrieval of conceptual information from action words causes greater activation in left middle and superior temporal gyri, anterior and dorsal to the MT/MST. We performed two fMRI experiments to replicate and extend these findings regarding action words. In the first experiment, subjects performed conceptual judgments of action and object words under conditions that stressed visual semantic information. Under these conditions, action words again activated posterior temporal regions close to, but not identical with, the MT/MST. In the second experiment, we included conceptual judgments of manipulable object words in addition to judgments of action and animal words. Both action and manipulable object judgments caused greater activity than animal judgments in the posterior middle temporal gyrus. Both of these experiments support the hypothesis that middle temporal gyrus activation is related to accessing conceptual information about motion attributes, rather than alternative accounts on the basis of lexical or grammatical factors. Furthermore, these experiments provide additional support for the notion of a concrete to abstract gradient of motion representations with the lateral occipitotemporal cortex, extending anterior and dorsal from the MT/MST towards the peri-sylvian cortex.
  • Publication
    Neural Substrates of Action Event Knowledge
    (2002-07-01) Kable, Joseph W; Chatterjee, Anjan; Lease-Spellmeyer, Jessica
    Human concepts can be roughly divided into entities (prototypically referred to in language by nouns) and events (prototypically referred to in language by verbs). While much work in cognitive neuroscience has investigated how the brain represents different categories of entities, less attention has been given to the more basic distinction between entities and events. We used functional magnetic resonance imaging to examine brain activity while subjects performed a conceptual matching task that required them to access knowledge of objects and actions, using either pictures or words. Since action events involve movement through space, we hypothesized that accessing knowledge of actions would cause greater activation in brain regions involved in motion or spatial processing. In comparison to objects, accessing knowledge of actions through pictures was accompanied by increased activity bilaterally in the human MT/MST and nearby regions of the lateral temporal cortex. Accessing knowledge of actions through words activated areas just anterior and dorsal to area MT/MST on the left, within the posterior aspect of the middle and superior temporal gyri. We propose that the lateral occipital temporal cortex contains a mosaic of neural regions that processes different kinds of motion, ranging from the perception of objects moving in the world to the conception of movement implied in action verbs. The lateral occipital temporal cortex mediates the perceptual and conceptual features of action events, similar to the way that the ventral occipital temporal cortex processes the perceptual and conceptual features of entities.
  • Publication
    Common and Unique Representations in pFC for Place Attractiveness
    (2015-05-01) Kable, Joseph W; Pegors, Teresa K; Chatterjee, Anjan; Epstein, Russell A
    Although previous neuroimaging research has identified overlapping correlates of subjective value across different reward types in the ventromedial pFC (vmPFC), it is not clear whether this “common currency” evaluative signal extends to the aesthetic domain. To examine this issue, we scanned human participants with fMRI while they made attractiveness judgments of faces and places—two stimulus categories that are associated with different underlying rewards, have very different visual properties, and are rarely compared with each other. We found overlapping signals for face and place attractiveness in the vmPFC, consistent with the idea that this region codes a signal for value that applies across disparate reward types and across both economic and aesthetic judgments. However, we also identified a subregion of vmPFC within which activity patterns for face and place attractiveness were distinguishable, suggesting that some category-specific attractiveness information is retained in this region. Finally, we observed two separate functional regions in lateral OFC: one region that exhibited a category-unique response to face attractiveness and another region that responded strongly to faces but was insensitive to their value. Our results suggest that vmPFC supports a common mechanism for reward evaluation while also retaining a degree of category-specific information, whereas lateral OFC may be involved in basic reward processing that is specific to only some stimulus categories.
  • Publication
    Buildings, Beauty, and the Brain: A Neuroscience of Architectural Experience
    (2017-09-01) Coburn, Alex; Vartanian, Oshin; Chatterjee, Anjan
    A burgeoning interest in the intersection of neuroscience and architecture promises to offer biologically inspired insights into the design of spaces. The goal of such interdisciplinary approaches to architecture is to motivate construction of environments that would contribute to peoples' flourishing in behavior, health, and well-being. We suggest that this nascent field of neuroarchitecture is at a pivotal point in which neuroscience and architecture are poised to extend to a neuroscience of architecture. In such a research program, architectural experiences themselves are the target of neuroscientific inquiry. Here, we draw lessons from recent developments in neuroaesthetics to suggest how neuroarchitecture might mature into an experimental science. We review the extant literature and offer an initial framework from which to contextualize such research. Finally, we outline theoretical and technical challenges that lie ahead.
  • Publication
    Cosmetic Neurology: For Physicians the Future is Now
    (2004-08-01) Chatterjee, Anjan
  • Publication
    Action Concepts in the Brain: An Activation Likelihood Estimation Meta-Analysis
    (2013-08-01) Watson, Christine E; Cardillo, Eileen R; Chatterjee, Anjan; Ianni, Geena R
    Many recent neuroimaging studies have investigated the representation of semantic memory for actions in the brain. We used activation likelihood estimation (ALE) meta-analyses to answer two outstanding questions about the neural basis of action concepts. First, on an “embodied” view of semantic memory, evidence to date is unclear regarding whether visual motion or motor systems are more consistently engaged by action concepts. Second, few studies have directly investigated the possibility that action concepts accessed verbally or nonverbally recruit different areas of the brain. Because our meta-analyses did not include studies requiring the perception of dynamic depictions of actions or action execution, we were able to determine whether conceptual processing alone recruits visual motion and motor systems. Significant concordance in brain regions within or adjacent to visual motion areas emerged in all meta-analyses. By contrast, we did not observe significant concordance in motor or premotor cortices in any analysis. Neural differences between action images and action verbs followed a gradient of abstraction among representations derived from visual motion information in the left lateral temporal and occipital cortex. The consistent involvement of visual motion but not motor brain regions in representing action concepts may reflect differences in the variability of experience across individuals with perceiving versus performing actions.
  • Publication
    Artistic Production Following Brain Damage: A Study of Three Artists
    (2011-10-01) Chatterjee, Anjan; Bromberger, Bianca; Smith, William B; Sternschein, Rebecca; Widick, Page
    We know little about the neurologic bases of art production. The idea that the right brain hemisphere is the “artistic brain” is widely held, despite the lack of evidence for this claim. Artists with brain damage can offer insight into these laterality questions. The authors used an instrument called the Assessment of Art Attributes to examine the work of two individuals with left-brain damage and one with right-hemisphere damage. In each case, their art became more abstract and distorted and less realistic. They also painted with looser strokes, less depth and more vibrant colors. No unique pattern was observed following right-brain damage. However, art produced after left-brain damage also became more symbolic. These results show that the neural basis of art production is distributed across both hemispheres in the human brain.
  • Publication
    Specificity of Action Representations in the Lateral Occipitotemporal Cortex
    (2006-09-01) Kable, Joseph W; Chatterjee, Anjan
    The ability to recognize actions is important for cognitive development and social cognition. Areas in the lateral occipitotemporal cortex show increased activity when subjects view action sequences; however, whether this activity distinguishes between specific actions as necessary for action recognition is unclear. We used a functional magnetic resonance imaging adaptation paradigm to test for brain regions that exhibit action-specific activity. Subjects watched a series of action sequences in which the action performed or the person performing the action could be repeated from a previous scan. Three regions—the superior temporal sulcus (pSTS), human motion-sensitive cortex (MT/MST), and extrastriate body area (EBA)—showed decreased activity for previously seen actions, even when the actions were novel exemplars because the persons involved had not been seen previously. These action-specific adaptation effects provide compelling evidence that representations in the pSTS, MT/MST, and EBA abstract actions from the agents involved and distinguish between different particular actions.
  • Publication
    Resident Decision Making: Opioids in the Outpatient Setting
    (2016-05-01) Kable, Joseph W; Siegler, James E; Chatterjee, Anjan
    Pain represents the chief complaint for nearly half of all emergency department (ED) and outpatient clinic visits in the United States, and as much as it pains the first author to admit it (being a resident physician himself), residents are the frontline clinicians who encounter these patients. Despite available resources, residents often are ill-prepared to manage these patients, particularly in regard to the use of opioid analgesics. Compared to other providers, residents are more likely to overtreat abusers of opioid analgesics and refill opioid prescriptions more quickly. The reasons for this behavior deserve further scrutiny. In this Perspectives article, we ask why residents may be more likely to prescribe opioids for pain, and we provide recommendations for educational interventions to address this.
  • Publication
    The promise and predicament of cosmetic neurology
    (2006-02-01) Chatterjee, Anjan
    Advances in cognitive neuroscience make cosmetic neurology in some form inevitable and will give rise to extremely difficult ethical issues.