Final Report Summary - PERCEPCON (From perception to conception: How the brain processes meaningful concepts)
In a large set of studies using both time-sensitive magnetoencephalography [MEG] and spatially-sensitive fMRI, we found that visual object recognition involves dynamic processes of transformation from low-level early visual analyses through superordinate category to basic-level conceptual representations. We found that different kinds of semantic representations are developed over time, from early categorical [animals, tools] representations in the fusiform to object-specific [dog, hammer] representations in the perirhinal cortex, suggesting a conceptual hierarchical of processing along the ventral stream similar to the visual hierarchy of processing. Our research shows that feature-based models of object meaning provide a unifying set of principles which account for the different types of semantic representations of objects that evolve over time along the ventral stream.
A review of this work has recently been published by Alex Clarke and Lorraine K Tyler in Trends in Cognitive Science, “Understanding what we see: How we derive meaning from vision”.2015, 19(11): 677-687.