An Internal Model of the Human Hand Affects Recognition of Graspable Tools
In this study, we validated a plausibility of a hypothesis that in the human brain an internal simulation of grasping contributes to tool recognition. Such an internal simulation must be performed by utilizing internal models of the human hand. An internal model corresponding to a geometrically transformed hand shape was retrained by an experimental paradigm we built. The retrained internal model of the dominant hand affected cognitive judgments of object size of tools used by the dominant hand and however did not influence these of tools used by the non-dominant hand. While, those results in the training condition of the non-dominant hand showed the reverse tendency of the former results. The above results indicate the plausibility of the hypothesis.
KeywordsGraspable tool Recognition Internal model Human hand
This research was partially supported by MEXT KAKENHI (C) No. 15K00200.
- 2.Borghi, A.M.: Object concepts and action. In: Grounding Cognition: The Role of Perception and Action in Memory, Language, and Thinking, pp. 2–34. Cambridge University Press, Cambridge (2005)Google Scholar
- 4.Imamizu, H., Miyauchi, S., Tamada, T., Sasaki, Y., Takino, R., Putz, B., Yoshioka, T., Kawato, M.: Human cerebellar activity reflecting an acquired internal model of a new tool. Nature 403(6766), 192–195 (2000)Google Scholar
- 10.van der Hoort, B., Guterstam, A., Ehrsson, H.H.: Being barbie: the size of one’\(s\) own body determines the perceived size of the world. PLoS ONE 6(5), 1–10 (2011)Google Scholar