RT Journal Article
SR Electronic
T1 Eye-movement reinstatement and neural reactivation during mental imagery
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 107953
DO 10.1101/107953
A1 Michael B. Bone
A1 Marie St-Laurent
A1 Christa Dang
A1 Douglas A. McQuiggan
A1 Jennifer D. Ryan
A1 Bradley R. Buchsbaum
YR 2017
UL http://biorxiv.org/content/early/2017/05/23/107953.abstract
AB Half a century ago, Donald Hebb posited that mental imagery is a constructive process that emulates perception. Specifically, Hebb claimed that visual imagery results from the reactivation of neural activity associated with viewing images. He also argued that neural reactivation and imagery benefit from the re-enactment of eye movement patterns that first occurred at viewing (fixation reinstatement). To investigate these claims, we applied multivariate pattern analyses to functional MRI (fMRI) and eye-tracking data collected while healthy human participants repeatedly viewed and visualized complex images. We observed that the specificity of neural reactivation correlated positively with vivid imagery and with memory for stimulus image details. Moreover, neural reactivation correlated positively with fixation reinstatement, meaning that image-specific eye movements accompanied image-specific patterns of brain activity during visualization. These findings support the conception of mental imagery as a simulation of perception, and provide evidence of the supportive role of eye-movement in neural reactivation.