BOLD activity during mental rotation and viewpoint-dependent object recognition.

Gauthier I, Hayward WG, Tarr MJ, Anderson AW, Skudlarski P, Gore JC
Neuron. 2002 34 (1): 161-71

PMID: 11931750

We measured brain activity during mental rotation and object recognition with objects rotated around three different axes. Activity in the superior parietal lobe (SPL) increased proportionally to viewpoint disparity during mental rotation, but not during object recognition. In contrast, the fusiform gyrus was preferentially recruited in a viewpoint-dependent manner in recognition as compared to mental rotation. In addition, independent of the effect of viewpoint, object recognition was associated with ventral areas and mental rotation with dorsal areas. These results indicate that the similar behavioral effects of viewpoint obtained in these two tasks are based on different neural substrates. Such findings call into question the hypothesis that mental rotation is used to compensate for changes in viewpoint during object recognition.

MeSH Terms (10)

Analysis of Variance Brain Brain Mapping Female Humans Magnetic Resonance Imaging Male Mental Processes Parietal Lobe Pattern Recognition, Visual

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