Toward construction of artificial intelligence systems for recognition of three-dimensional objects based on population cell activity

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K07713
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 51010:Basic brain sciences-related
• Research Institution: Kagoshima University
• Principal Investigator: Okamura Jun-ya 鹿児島大学, 理工学域工学系, 准教授 (30447594)
• Co-Investigator(Kenkyū-buntansha): 王 鋼 鹿児島大学, 理工学域工学系, 教授 (40274831)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 物体認識 / TE野 / TEO野 / 神経細胞集団 / 機械学習

Outline of Final Research Achievements

Area TE is a final visual area, where object information is processed, in macaque brain. Population responses of the cells in area TE and area TEO, which supplies major afferent to area TE, were analyzed by using machine learning. It has been reported that single cells in area TE show viewing angle tolerance of 30-60° to the objects with a prior experience of within-set image task, in which monkeys had experienced the objects in discrimination at each of several viewing angles. In the present study population of the cells in areas TE and TEO were analyzed by using machine learning. Population of the cells in area TE showed viewing angle tolerance of 30-60° to the objects that the monkeys had experienced in object task, in which different views of an object were associated, and within-set image task. Viewing angle tolerance of the population of the cells in area TEO was not observed, suggesting viewing angle tolerance is represented in the population of the cells in area TE.

Free Research Field

神経科学

Academic Significance and Societal Importance of the Research Achievements

観察角度が変わると物体の網膜像が大きく変化する。しかし、私たちは観察角度の変化に関わらず同じ物体をよく似た別の物体から区別できる。この観察角度に依らない物体認識が脳のどの部位で形成されるかを本研究課題では明らかにした。物体視の最終段に位置するTE野の神経細胞集団において観察角度許容性が表現され、TE野に入力するTEO野の神経細胞集団では表現されていなかった。このことから、観察角度許容性は物体視の最終段に位置するTE野において表現される視覚機能であることが明らかになった。