Detection versus location judgments in a hidden pattern task: Functional MRI and behavioral correlates

Abstract

We used functional magnetic resonance imaging (fMRI) to assess cortical involvement in a hidden pattern task. The experimental and control conditions involved judgment of the presence/absence versus the position of a complex pattern. Activation specific to hidden pattern identification was concentrated on frontal, dorsal parietal, and mesolimbic cortex. This was consistent not only across individual subjects, but with hidden figures tasks used in previous fMRI investigations. Results suggest that pattern identification relies on a relatively stable neural network controlling selective attention. In combination with fMRI, hidden pattern tasks may be useful in neuropsychological assessment of visual search and object identification.

Keywords:

• Hidden figures
• Embedded figures
• Selective attention
• Functional magnetic resonance imaging
• Visual search

Acknowledgments

This work was supported in part by the grants from the Canadian Institute for Health Research (CIHR), the Natural Sciences and Engineering Research Council (NSERC), and the National Research Council Canada.