Role of the precuneus in the detection of incongruency between tactile and visual texture information: A functional MRI study

Ryo Kitada*, Akihiro T. Sasaki, Yuko Okamoto, Takanori Kochiyama, Norihiro Sadato

*この研究の対応する著者

研究成果: Article査読

24 被引用数 (Scopus)

抄録

Visual clues as to the physical substance of manufactured objects can be misleading. For example, a plastic ring can appear to be made of gold. However, we can avoid misidentifying an object's substance by comparing visual and tactile information. As compared to the spatial properties of an object (e.g., orientation), however, little information regarding physical object properties (material properties) is shared between vision and touch. How can such different kinds of information be compared in the brain? One possibility is that the visuo-tactile comparison of material information is mediated by associations that are previously learned between the two modalities. Previous studies suggest that a cortical network involving the medial temporal lobe and precuneus plays a critical role in the retrieval of information from long-term memory. Here, we used functional magnetic resonance imaging (fMRI) to test whether these brain regions are involved in the visuo-tactile comparison of material properties. The stimuli consisted of surfaces in which an oriented plastic bar was placed on a background texture. Twenty-two healthy participants determined whether the orientations of visually- and tactually-presented bar stimuli were congruent in the orientation conditions, and whether visually- and tactually-presented background textures were congruent in the texture conditions. The texture conditions revealed greater activation of the fusiform gyrus, medial temporal lobe and lateral prefrontal cortex compared with the orientation conditions. In the texture conditions, the precuneus showed greater response to incongruent stimuli than to congruent stimuli. This incongruency effect was greater for the texture conditions than for the orientation conditions. These results suggest that the precuneus is involved in detecting incongruency between tactile and visual texture information in concert with the medial temporal lobe, which is tightly linked with long-term memory.

本文言語English
ページ(範囲)252-262
ページ数11
ジャーナルNeuropsychologia
64
DOI
出版ステータスPublished - 2014 11 1
外部発表はい

ASJC Scopus subject areas

  • 実験心理学および認知心理学
  • 認知神経科学
  • 行動神経科学

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