Abstract
Sasaoka et al.(2005) showed that active exploration of 3-D object views facilitated subsequent object recognition performance. We investigated neural substrates contributing to this facilitation using MEG. The MEG data was recorded while participants performed a matching task in which two 3-D object views related by rotation were serially presented. There were two recording sessions. Before the second session, participants in the Active group actively explored 3-D object views. Participants in the Passive group observed a replay of the active exploration. In 200-400ms after the second view onset, an equivalent current dipole was estimated in the left intraparietal sulcus for most of the participants. In the second session, the RMS of all channels on the left hemisphere in that period decreased for the Active group. This tendency was clear when the angular distance between two views was large. These results suggested that active exploration affected the activation in the left IPS.
