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Functional brain mapping of monkey tool use.

S Obayashi·T Suhara·K Kawabe·T Okauchi·J Maeda·Y Akine·H Onoe·A Iriki
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Abstract

When using a tool, we can perceive a psychological association between the tool and the body parts-the tool is incorporated into our "body-image." During tool use, visual response properties of bimodal (tactile and visual) neurons in the intraparietal area of the monkey's cerebral cortex were modified to include the hand-held tool. Visual properties of the monkey intraparietal neurons may represent the body-image in the brain. We explored tool use-induced activation within the intraparietal area and elsewhere in alert monkey brain using positron emission tomography (PET). Tool use-related activities compared with the control condition (simple-stick manipulation) revealed a significant increase in cerebral blood flow in the corresponding intraparietal region, basal ganglia, presupplementary motor area, premotor cortex, and cerebellum. These tool use-specific areas may participate in maintaining and updating the body-image for the precise guidance of a hand-held rake onto a distant reward.

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AnimalsBrainBrain MappingImage Processing, Computer-AssistedImaging, Three-DimensionalMacacaMaleParietal LobeProblem SolvingPsychomotor PerformanceRegional Blood FlowTomography, Emission-ComputedJournal ArticleResearch Support, Non-U.S. Gov't

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S Obayashi, T Suhara, K Kawabe, T Okauchi, J Maeda, Y Akine, H Onoe, A Iriki. 2001. Functional brain mapping of monkey tool use.. https://doi.org/10.1006/nimg.2001.0878

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