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Cerebral Mechanism of Visually Guided Eye Movements

Research Project

Project/Area Number 60480113
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Neurophysiology and muscle physiology
Research InstitutionHirosaki University

Principal Investigator

SUZUKI Hisao  Hirosaki Univ. Sch. of Medicine (professor), 医学部, 教授 (00003351)

Co-Investigator(Kenkyū-buntansha) SASAKI Yosihiro  Hirosaki Univ. Sch. of Medicine (reseach associate), 医学部, 助手 (70178672)
NAKAYAMA Hirofumi  Hirosaki Univ. Sch. of Medicine (research associate), 医学部, 助手 (90172478)
AZUMA Masao  Hirosaki Univ. Sch. of Medicine (associate professor), 医学部, 助教授 (60003563)
Project Period (FY) 1985 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 1987: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1986: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1985: ¥3,200,000 (Direct Cost: ¥3,200,000)
Keywordsfrontal eye field / eye movements / monkey / microstimulation / サッケード / 眼球運動 / 視覚性入力 / 入力線維連絡
Research Abstract

We tried to reveal the role of the frontal eye field (FEF) in the generation of visually guided eye movements using alert macaque monkeys. We first localized the extent of the FEF as the cortical area in which intracortical microstimulation elicites saccadic eye movements. The area was found to be restricted in the anterior bank of the arcuate sulcus extending anteriorly to the cortical exposed surface. In thus defined FEF, there was topographic organization regarding the amplitude of the electrically elicited saccade. We obtained saccades with similar amplitude and direction in all depth of a cortical locus. When stimulating different loci, saccade vector properties changed systematically. A small saccade was elicited in the lateral portion of FEF, and a large one was in the medial portion. We also investigated the visual input to the FEF by recording visual neurons. They were diffusely present in the FEF, and they were again topographically organized. In the lateral portion, neurons had small receptive fields near the center of gaze. Neurons in the medial portion had large receptive fields in the peripheral visual field. Then, we further examined the relation between the visual input and the motor (saccadic) output in each locus. The saccade brought the visual line into a part where the visual receptive field had occupied before the stimulation, suggesting that the visual input facilitates the saccade generation. Considering these results together with differentiation in the afferent and efferent neural structures, we postulated that the FEF plays an important role in the generation of saccades triggered by a visual object.

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Komatu: Brain Res.327. 324-327 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Suzuki: Vision Res.25. 465-469 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Azuma: J. Physiol. Soc. Japan. 47. 450 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Sasaki: J. Physiol. Soc. Japan. 48. 338 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Suzukj: J. elctrophysiol. tech. 14. 121-124 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Azuma: Behav. Brain Res.27. 93-98 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Komatu: "Projections from the functional subdivisions of the frontal eye field to the superior colliculus in the monkey" Brain Res.327. 324-327 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Suzuki: "Distribution and organization of visual and anditory neurons in the monkey prefrontal cortex." Vision Res.25. 465-469 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Sasaki: "Eye movements examined by the corneal reflection image." J. Physiol. Soc. Japan. 48. 338- (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Suzuki: "A reliable marking technique for identification of recording and stimulating sites in the brain." J. electrophysiol. tech.14. 121-124 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Azuma: "Relation between visual input and motor outflow for eye movements in monkey frontal eye field." Behav. Brain Res.27. 93-98 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Masao Azuma: J.Physiol.Soc.Japan. 48. 109 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] Yoshihiro Sasaki: J.Physiol.Soc.Japan. 48. 336 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] Masao Azuma: Neurosci.Res.S3. 89 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] Hisao Suzuki: J.Electrophysiol.Tech. 14. (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] Masao Azuma: Behav.Brain Res.

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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