ORIENTATION & MOTION

Decoding orientation and motion - Our lab has developed novel methods to decode fundamental aspects of perception by analyzing the information contained in fMRI activity patterns in the human visual cortex. By analyzing the information contained in coarse-scale fMRI signals, we can detect the presence of feature-selective information that primarily resides at fine spatial scales.

Our fMRI methods allow us to reliably predict which of several orientations or motion directions a person is viewing. Moreover, when observers are presented with an ambiguous display consisting of two overlapping features (e.g., horizontal and vertical stripes), we can decode the contents of feature-based attention to determine which of two competing features is dominant in a person's mind.

Relevant Publications

Kamitani, Y., Tong, F. (2005). Decoding the visual and subjective contents of the human brain. Nature Neuroscience, 8: 679-85.

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Kamitani, Y, & Tong, F. (2006). Decoding seen and attended motion directions from activity in the human visual cortex. Current Biology, 16, 1096-1102.

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Yamashita, O., Sato, M.-A., Yoshioka, T., Tong, F., Kamitani, Y. (2008). Sparse estimation automatically selects voxels relevant for the decoding of fMRI activity patterns. Neuroimage, 42, 1414-1429.

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Swisher, J.D., Gatenby, J.C., Gore, J.C., Wolfe, B.A., Moon, C.-H., Kim, S.-G., Tong, F. (2010). Multiscale pattern analysis of orientation-selective activity in the primary visual cortex. Journal of Neuroscience. 30: 325-330.

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Hong, S. W., Tong, F., & Seiffert, A. E. (2012). Direction-selective patterns of activity in human visual cortex suggest common neural substrates for different types of motion. Neuropsychologia, 50(4): 514-21.

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Tong, F., & Pratte, M.S. (2012). Decoding patterns of human brain activity. Annual Review of Psychology, 63, 483-509.

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