The dynamics of invariant object recognition in the human visual system.

TitleThe dynamics of invariant object recognition in the human visual system.
Publication TypeJournal Article
Year of Publication2014
AuthorsIsik, L, Meyers, E, Leibo, JZ, Poggio, T
JournalJ Neurophysiol
Volume111
Issue1
Pagination91-102
Date Published01/2014
ISSN1522-1598
KeywordsAdolescent, Adult, Evoked Potentials, Visual, Female, Humans, Male, Pattern Recognition, Visual, Reaction Time, visual cortex
Abstract

The human visual system can rapidly recognize objects despite transformations that alter their appearance. The precise timing of when the brain computes neural representations that are invariant to particular transformations, however, has not been mapped in humans. Here we employ magnetoencephalography decoding analysis to measure the dynamics of size- and position-invariant visual information development in the ventral visual stream. With this method we can read out the identity of objects beginning as early as 60 ms. Size- and position-invariant visual information appear around 125 ms and 150 ms, respectively, and both develop in stages, with invariance to smaller transformations arising before invariance to larger transformations. Additionally, the magnetoencephalography sensor activity localizes to neural sources that are in the most posterior occipital regions at the early decoding times and then move temporally as invariant information develops. These results provide previously unknown latencies for key stages of human-invariant object recognition, as well as new and compelling evidence for a feed-forward hierarchical model of invariant object recognition where invariance increases at each successive visual area along the ventral stream.

Corresponding Dataset - The dynamics of invariant object recognition in the human visual system.

URLhttp://jn.physiology.org/content/early/2013/09/27/jn.00394.2013.abstract
DOI10.1152/jn.00394.2013
Alternate JournalJ. Neurophysiol.
PubMed ID24089402
PubMed Central IDPMC4280161
Grant ListT32 GM007484 / GM / NIGMS NIH HHS / United States

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