Hyperalignment Reveals Shared Information in Macaques' Idiosyncratic Fine-Grained Movie fMRI Patterns
Zhang, Y.; Wang, H.; Zhu, Q.; Li, X.; Han, J.; Jiahui, G.; Shim, W. M.; Kim, R.; Gobbini, M. I.; Haxby, J. V.; Feilong, M.; Vanduffel, W.
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We modeled shared representational spaces in macaque brains using fMRI data from 12 rhesus monkeys obtained during movie-viewing and response hyperalignment (RHA). RHA greatly improved inter-subject correlation of movie response time-series in occipital, temporal, and prefrontal cortices and afforded highly accurate between-subject decoding of movie time-points and estimation of idiosyncratic functional topographies. These results reveal shared high-dimensional, high capacity representational spaces encoded in idiosyncratic fine- and coarse-grained functional topographies.
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