Neural Mechanism in Numerical Counting Processes of Presented Objects

• Project/Area Number: 21500365
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Neurophysiology and muscle physiology
• Research Institution: Tohoku University
• Principal Investigator: SHIMA Keisetsu 東北大学, 大学院・医学系研究科, 助教 (60124583)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 細胞活動 / カウンティング / サル / 認知課題 / 数的操作 / 認知機能 / 数 / 視覚認知 / カウンティング課題 / 前頭前野 / 日本サル / 前補足運動野

Research Abstract

Previous b ehavioral studies in primates have suggested the existence of two distinct elements in numerical system, such as approximate and precise numerical systems. How the precise numerical system is operated in the monkey. We trained two monkeys to perform a numerosity-based operation task and examined the effect of numerosity on the performance level. Two distinct number systems exist with the critical object index-number of 4. The monkey was able to change the number of dots. The monkey was able to adjust device-use to change dot numbers toward a target number. Also, the monkey successfully switched to effective device-use, and the device-use chosen in the first step of each trial was become effective after several trials. It was suggested that intra-trial and inter-trial switching behavior may have different mechanisms.

Research Products

• [Journal Article] Neuronal activity in the prefrontal cortex during performance of a dual task consisting of a main-and an interrupting-task. (2012)
  • Author(s): Miyazaki, A., Nakajima, T., Shima, K., Mushiake, H.
  • Journal Title: Int. Conf. Cog. Neuro Volume: Vol.3,(印刷中)
  • Peer Reviewed
• [Journal Article] Neuronal activity in the prefrontal cortex during performance of a dual task consisting of a main- and an interrupting-task (2012)
  • Author(s): Miyazaki, A., Nakajima, T, Shima, K., Mushiake, H.
  • Journal Title: Int.Conf.Cog.Neuro. Volume: 3(印刷中)
  • Peer Reviewed
• [Journal Article] Neuronal mchanism controlling a dual-task consisting of a sequential motor task and an interrupting task (2012)
  • Author(s): Nakajima, T., Miyazaki, A., Shima, K., Mushiake, H
  • Journal Title: 日本神経回路学会誌 Volume: 18 Pages: 129-134
• [Journal Article] 順序動作課題と割込課題からなる二重課題を制御する神経機構 (2011)
  • Author(s): 中島敏, 宮崎淳, 嶋啓節, 虫明元
  • Journal Title: 日本神経回路学会誌 Volume: Vol.18、129-134
  • NAID: 10029734035
• [Journal Article] Deciphering elapsed time and predicting action timing from neuronal population signals (2011)
  • Author(s): Shinomoto, S, Omi, T, Mita, A, Mushiake, H., Shima, K., Matsuzaka, Y., Tanji, J.
  • Journal Title: Front. Comput. Neurosci Volume: 5 : Article 29 Pages: 1-11
  • NAID: 120003674042
  • Peer Reviewed
• [Journal Article] Deciphering elapsed time and predicting action timing from neuronal population signals (2011)
  • Author(s): Shinomoto, S, Omi, T, Mita, A, Mushiake, H., Shima, K., Matsuzaka, Y., Tanji, J.
  • Journal Title: Front.Comput.Neurosci. Volume: 5 Pages: 1-11
  • NAID: 120003674042
  • Peer Reviewed
• [Journal Article] Deficits in Action Selection Based on Numerical Informationafter Inactivation of the Posterior Parietal Cortex in Monkeys (2010)
  • Author(s): Sawamura, H., Shima, K, Tanji, J.
  • Journal Title: J. Neurophysiol Volume: 104 Pages: 902-910
  • Peer Reviewed
• [Journal Article] Deficits in Action Selection Based on Numerical Informationafter Inactivation of the Posterior Parietal Cortex in Monkeys. (2010)
  • Author(s): Sawamura, H., Shima, K., Tanji, J.
  • Journal Title: J.Neuropysiology Volume: 104 Pages: 902-910
  • Peer Reviewed
• [Journal Article] Interval time coding by neurons in the presupplementary and supplementary motor areas (2009)
  • Author(s): Mita, A., Mushiake, H., Shima, K., Matsuzaka, Y., Tanji, J.
  • Journal Title: Nat Neurosci Volume: 12 Pages: 502-507
  • Peer Reviewed
• [Journal Article] Relating neuronal firing patterns to functional differentiation of cerebral cortex. (2009)
  • Author(s): Shinomoto, S., Kim, H., Shimokawa, T., Matsuno, N., Funahashi, S., Shima, K, Fujita, I., Tamura, H., Doi, T., Kawano, K., Inaba, N., Fukushima, K., Kurkin, S., Kurata, K., Taira, M., Tsutsu, K., Hidehiko Komatsu, H., Ogawa, T., Koida, K., Tanji, J., Toyama, K.
  • Journal Title: PLoS.Comput.Biol. 5
  • NAID: 120003780186
  • Peer Reviewed
• [Journal Article] Interval time coding by neurons in the presupplementary and supplementary motor areas. (2009)
  • Author(s): Mita, A., Mushiake, H., Shima, K., Matsuzaka, Y., Tanji, J.
  • Journal Title: Nature Neurosci. 12 Pages: 502-507
  • Peer Reviewed