Inferotemporal neurons represent low-dimensional configurations of parameterized shapes
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- 19 November 2001
- journal article
- research article
- Published by Springer Nature in Nature Neuroscience
- Vol. 4 (12) , 1244-1252
- https://doi.org/10.1038/nn767
Abstract
Behavioral studies with parameterized shapes have shown that the similarities among these complex stimuli can be represented using a low number of dimensions. Using psychophysical measurements and single-cell recordings in macaque inferotemporal (IT) cortex, we found an agreement between low-dimensional parametric configurations of shapes and the representation of shape similarity at the behavioral and neuronal level. The shape configurations, computed from both the perceived and neuron-based similarities, revealed a low number of dimensions and contained the same stimulus order as the parametric configurations. However, at a metric level, the behavioral and neural representations deviated consistently from the parametric configurations. These findings suggest an ordinally faithful but metrically biased representation of shape similarity in IT.Keywords
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