The 94th KARC Colloquium
The 94th KARC Colloquium was ended. Thank you for the participation.
| Date&Time | Thursday, 31, July, 2008 14:00-16:00 |
| Place | TV Conference Room, 3F, Research Building 2,Kobe Advanced ICT Research Center |
| Lecturer | “Visualization of monkey’s hierarchical worldview” |
| Speaker | Dr. Masato Okada The University of Tokyo, Graduate School of Frontier Sciences, Department of Complexity Science and Engineering, Professor |
| Abstract | Sugase et al. presented 38 images to two monkeys and conducted single unit recordings in the inferior temporal (IT) cortex, a crucial area for pattern recognition. The 38 images were divided into three groups: a group with monkey faces, a group with human faces, and a group with simple shapes. The group with human faces was further divided into three individual human faces with four facial expressions. The group with monkey faces was further divided into four individual monkey faces with four facial expressions. There is a hierarchical structure in the set of images. We found that 38 neural population vectors corresponding to the 38 images split into three clusters corresponding to human faces, monkey faces and other simple shapes in the early phase (90-140msec), and that these three clusters split into sub-clusters corresponding to finer categorizations in the later phase (140-190msec). This finding strongly suggests that the hierarchical structure embedded in the set of images is encoded in the temporal evolutions of neuron activities in the IT cortex. |
| Language | Japanese |
| Admission | Free |
| Organizer | Dr.Yasushi Naruse Biological ICT group,Kobe Advanced ICT Research Center |