WHO:	Seong Gi-Kim , Professor of Neurobiology Brain Imaging Research Center University of Pittsburgh
TOPIC:	How accurately fMRI detects neural activity sites
ABSTRACT:	The conventional fMRI approach has been extensively used for investigating various brain functions with a spatial resolution ranging from a few millimeters to a few centimeters. While this spatial scale is suitable for the majority of cognitive and psychology questions, it is not adequate for studying functional parcellation at the millimeter or sub-millimeter level. In my talk, I will discuss about spatial specificity of fMRI signals at a sub-millimeter level. Spatial constraints of current fMRI techniques were examined using a cat orientation column model. If large vessel contribution is minimized, the fMRI response can be specific to sub-millimeter columnar and laminar structures. This suggests that if only tissue specific signal is observed, fMRI can detect sites of neural activity accurately.Ã
WHEN:	9/22/2003 12:00:00 PM
WHERE:	Meliora 269

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