Georgetown University Medical Center home page Georgetown University home page Georgetown University Medical Center home page Search Directory About CSL

Programmed by Vladislav Staroselskiy

 

ABOUT CSL  
NEWS/EVENTS  
CSL MEMBERS  
DYSLEXIA  
RESEARCH  
BE INVOLVED  
WHAT IS FMRI?  
INFORMATION PACKETS  
SOFTWARE  
CLASSES  
CSL INTERNAL  
CONTACT US  

Chandan Vaidya, Ph.D.

Associate Professor, Department of Psychology

B.A. -- Bombay University, 1984, Psychology
M.S. -- Syracuse University, 1989, Developmental Psychology
Ph.D -- Syracuse University, 1992, Developmental Psychology

Dr. Vaidya received her post-doctoral training in Cognitive Neuroscience from Stanford University. She is currently the director of the Developmental Cognitive Neuroscience Lab at Georgetown. Her research aims at characterizing the neurobiological basis of cognitive control. She links behavior to brain by using paradigms from experimental psychology to isolate cognitive processes in healthy individuals. She then applies these paradigms to patients with disorders of cognitive processes due to lesions, degenerative diseases such as Alzheimer's, or developmental disorders such as Attention Deficit Hyperactivity Disorder (ADHD). functional Magnetic Resonance Imaging (fMRI) is then used to image these cognitive processes in the brain. These sources of evidence constrain each other in important ways and offer a convergent view of the neurobiological basis of cognition that is informative not only to the basic cognitive scientist but also to the clinical practitioner, whether it be for diagnosis or intervention. For instance, using pharmacological fMRI, she found that improvements in attention and methylphenidate were related to distinct brain responses in children diagnosed with ADHD relative to healthy children. These findings suggest dopaminergic dysfunction in ADHD, and may be useful in the development of biologically valid diagnostic criteria for that disorder.

Publications:

  1. Demb, J. B., Desmond, J. E., Wagner, A. D., Vaidya, C. J., Glover, G. H., and Gabrieli, J. D. E. (1995). Semantic encoding and retrieval in the left inferior prefrontal cortex: A functional MRI study of task difficulty and process specificity. Journal of Neuroscience, 15, 5870-5878.
  2. Vaidya, C. J., Gabrieli, J. D. E., Keane, M. M., and Monti, L. A. (1995). Perceptual and conceptual memory processes in global amnesia. Neuropsychology, 4, 580-591.
  3. Gabrieli, J. D. E., Desmond, J. E., Demb, J. B., Wagner, A. D., Stone, M. V., Vaidya, C. J., & Glover, G. H. (1996). Functional magnetic resonance imaging of semantic memory processes in the frontal lobes. Psychological Science, 7, 278-283.
  4. Verfaellie, M., Gabrieli, J. D. E., Vaidya, C. J., Croce, P. & Reminger, S. L. (1996). Implicit memory for pictures in amnesia: role of etiology and priming task. Neuropsychology, 10, 517-528.
  5. Vaidya, C. J., Gabrieli, J. D. E., Demb, J. B., Keane, M. M., and Wetzel, L. C. (1996). Impaired priming on the general knowledge task in amnesia. Neuropsychology, 10, 529-537.
  6. Fleischman, D. A., Vaidya, C. J., Lange, K. L., and Gabrieli, J. D. E. (1997). A dissociation between visuoperceptual explicit and implicit memory processes. Brain and Cognition, 35, 42-57.
  7. Vaidya, C. J., Gabrieli, J. D. E., Keane, M. M., Monti, L. A., Gutierrez-Rivas, H., and Zarella, M. M. (1997). Evidence for multiple mechanisms of conceptual priming on implicit memory tests. Journal of Experimental Psychology: Learning, Memory, & Cognition, 23, 1324-1343.
  8. Vaidya, C. J., Gabrieli, J. D. E., Verfaellie, M., Fleischman, D., & Askari, N. Font- specific priming following global amnesia and occipital lobe damage. (1998). Neuropsychology, 12, 1-10.
  9. Stone, M., Ladd, S. L., Vaidya, C. J., & Gabrieli, J. D. E. (1998). Word identification priming for ignored and attended words. Consciousness and Cognition: An International Journal, 7, 238-258.
  10. Vaidya, C. J., Austin, G., Kirkorian, G., Ridlehuber, H. W., Desmond, J. E., Glover, G. H., & Gabrieli, J. D. E. (1998). Selective effects of methylphenidate in Attention Deficit Hyperactivity Disorder: A functional magnetic resonance study. Proceedings of the National Academy of Sciences, 95, 14494-14499.
  11. Fleischman, D. A., Gabrieli, J. D. E., Reminger, S., Vaidya, C. J., & Benett, D. A. (1998). Object decision priming in Alzheimer's disease. Journal of the International Neuropsychological Society, 4, 435-446.
  12. Klingberg, T., Vaidya, C. J., Gabrieli, J. D. E., Moseley, M. E., & Hedehus, M. (1999). Myelination and organization of the frontal white matter in children: A diffusion tensor MRI study. NeuroReport, 10, 2817-2821.
  13. Vaidya, C. J. and Gabrieli, J. D. E. (1999). Searching for a neurobiological signature of Attention Deficit Hyperactivity Disorder. Molecular Psychiatry, 4, 206-208.
  14. Gabrieli, J. D. E., Brewer, J., and Vaidya, C. J. (1999). Memory. In Textbook of Neurology (Eds. C. Goetz and E. J. Pappert, pp. 56-69). W. B. Saunders Company: Orlando, Florida.
  15. Gabrieli, J. D. E., Vaidya, C. J., Stone, M., Francis, W. S., Thompson- Schill, S. L., Fleischman, D. A., Tinkelberg, J. R., Yesavage, J. A., & Wilson, R. S. (1999). The role of attention in repetition priming: Convergent behavioral and neuropsychological evidence. Journal of Experimental Psychology: General, 128, 479-498.
  16. Vaidya, C. J., Gabrieli, J. D. E., Monti, L. A., Tinklenberg, J. R., & Yesavage, J. A. (1999). Dissociation between two forms of conceptual priming in Alzheimer's disease. Neuropsychology, 13, 516-524.
  17. Vaidya, C. J., & Gabrieli, J. D. E. (2000). Picture superiority in conceptual memory: Dissociative effects of encoding and retrieval tasks. Memory & Cognition, 28, 1165-1172.
  18. Bunge, S. A., Dudukovic. N. M., Thomason, M. E., Vaidya, C. J., & Gabrieli, J. D. E. (2002). Development of frontal lobe contributions to cognitive control in children: Evidence from fMRI. Neuron, 33, 301-311.
  19. Vaidya, C. J., Zhao, M., Desmond, J. E., & Gabrieli, J. D. E. (2002). Evidence for cortical encoding specificity in episodic memory: Memory- induced re-activation of picture processing areas. Neuropsychologia, 40(12), 2136-2143.
  20. Vaidya, C. J. (2002). Application of pharmacological fMRI to developmental psychiatric disorders. Developmental Science, (3), 310-317.
  21. Gabrieli JDE, Preston AR, Brewer J, and Vaidya (2003). Memory. In: Goetz C, Pappert EJ (eds.), In: Textbook of Neurology 2nd Edition. Orlando, Florida: W. B. Saunders Company 56-69.
  22. Howard JH, Jr., Howard DV, Dennis NA, Yankovich H, and Vaidya (2004). Implicit spatial contextual learning in healthy aging. Neuropsychology 18: 124-134.
  23. Vaidya, C.J., Bunge S.A., Dudukovic N.M., Zalecki C.A., Elliott G.R., and Gabrieli J.D.E. (in press). Altered neural substrates of cognitive control in childhood ADHD: Evidence from functional magnetic resonance imaging. American Journal of Psychiatry.
  24. Berl M.M., Vaidya C.J., and Gaillard W.D. (in press). Functional imaging of developmental and adaptive changes in neurocognition. Neuroimage.
Georgetown University home page