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.

doi:10.64898/2026.06.14.731832

bioRxiv · 10.64898/2026.06.14.731832

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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Abstract

Response hyperalignment (RHA) of fMRI patterns acquired during movie-viewing in 12 rhesus monkeys revealed shared representational spaces despite idiosyncratic functional topographies. 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 demonstrate that nonhuman primates share high-dimensional, high-capacity representational spaces encoded in idiosyncratic fine-grained functional topographies.

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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.. 2026-06-18. Hyperalignment Reveals Shared Information in Macaques' Idiosyncratic Fine-Grained Movie fMRI Patterns. https://doi.org/10.64898/2026.06.14.731832

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