• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Functional integration of vergence and accommodation at the rostral Superior Colliclus and its role in strabismus

Research Project

Project/Area Number 13470370
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Ophthalmology
Research InstitutionSapporo Medical University

Principal Investigator

OHTSUKA Kenji  Sapporo Medical University, School of Medicine, Professor, 医学部, 教授 (60203832)

Co-Investigator(Kenkyū-buntansha) HASHIMOTO Masato  Sapporo Medical University, School of Medicine, Assistant Professor, 医学部, 講師 (90295353)
OHBA Masahiro  Sapporo Medical University, School of Medicine, Assistant Professor, 医学部, 講師 (00244343)
SUZUKI Yasuo  Sapporo Medical University, School of Medicine, Assistant Professor, 医学部, 講師 (40221329)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 2002: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2001: ¥6,800,000 (Direct Cost: ¥6,800,000)
KeywordsSuperior Colliculus / vergence / accommodation / fixation / fixation zone / disconjugate eve movement / near reflex / strabismus
Research Abstract

We have repented that the rostral superior colliculus (the rostral SC) of cats is involved in the control of accommodation (Ohtsuka et al., 1993 ; 1994 ; 1996), and that the rostral SC receives descending projections from the cortical area related to accommodation and vergence (Ohtsuka et al., 1996). In the present study, we investigated the role of the rostral SC on the control of vergence eye movements. Two alert cats were used in this study. Binocular eye movements were recorded using magnetic search coils. The SC was identified and mapped by a single-unit activity mat showed correlation with visual stimuli and/or saccades. Disconjugate eye movements (3.9deg.+/-0.9deg., mean+/-SD) were evoked by the electrical micro-stimulation of the rostral SC (10-40 μA, 125-500Hz, 125-500ms). We inactivated the rostral SC of an alert cat trained to track a vergence target by 0.5%muscimol injections (0.5μl). Convergence eye movements were almost abolished by the injection of muscimol in the unilateral rostral SC. Spontaneous saccades were inhibited by stimulation of the same area where disconjugate eye movements were evoked. These findings suggest that the rostral SC is involved in the control of vergence eye movements. We think that the rostral SC is an important neural substrate for the functional linkage of accommodation, vergence and visual fixation

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] Ohtsuka K: "Effects of superior colliculus inhibition on three-dimensional visual motion processing in the lateral supurasylvian visual area of the cat"Jpn J Ophthalmol. 45. 475-481 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kawata Y: "Dynamic asymmetries in convergence eye movements under natural viewing conditions"Jpn J Ophthalmol. 45. 437-444 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hashimoto M: "Vascular compression as a cause of superior oblique myokimia disclosed by thin-slice magnetic resonance imaging"Am J Ophthalmol. 131. 676-677 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ohtsuka K: "Accommodation and convergence palsy due to lesions in the bilateral rostral superior colliculus"Am J Ophthalmol. 133. 425-427 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ohsuka K: "Effect of steroid pulse therapy with or without orbital radiotherapy on Graves' ophthalmopathy"Am J Ophthalmol. 135・3. 285-290 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Suzuki Y: "Three-dimensional eye movement analysis of superior oblique myokimia"Am J Ophthalmol. (In press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ohtsuka K: "Effects of superior colliculus inhibition on three-dimensional visual motion processing in the lateral supurasylvian visual area of the cat"Jpn J Ophthalmol. 45. 475-481 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kawata Y: "Dynamic asymmetries in convergence eye movements under natural viewing conditions"Jpn J Ophthalmol. 45. 437-444 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hashimoto M: "Vascular compression as a cause of superior oblique myokimia disclosed by thin-slice magnetic resonance imaging"Am J Ophthalmol. 131. 676-677 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ohtsuka K: "Accommodation and convergence palsy due to lesions in the bilateral rostral superior colliculus"Am J Ophthalmol. 133. 425-427 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ohtsuka K: "Effect of steroid pulse therapy with or without orbital radiotherapy on Graves' ophthalmopathy"Am J Ophthalmol. (In press). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Suzuki Y: "Three-dimensional eye movement analysis of superior oblique myokimia"Am J Ophthalmol. (In press). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ohtsuka K: "Effects of superior colliculus inhibition on three-dimensional visual motion processing in the lateral supurasylvian visual area of the cat"Jpn J Ophthalmol. 45. 475-481 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] Kawata Y: "Dynamic asymmetries in convergence eye movements under natural viewing conditions"Jpn J Ophthalmol. 45. 437-444 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] Hashimoto M: "Vascular compression as a cause of superior oblique myokimia disclosed by thin-slice magnetic resonance imaging"Am J Ophthalmol. 131. 676-677 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] Ohtsuka K: "Accommodation and convergence palsy due to lesions in the bilateral rostral superior colliculus"Am J Ophthalmol. 133. 425-427 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Ohsuka K: "Effect of steroid pulse therapy with or without orbital radiotherapy on Graves' ophthalmopathy"Am J Ophthalmol. 135・3. 285-290 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Suzuki Y: "Three-dimensional eye movement analysis of superior oblique myokimia"Am J Ophthalmol. (In press).

    • Related Report
      2002 Annual Research Report

URL: 

Published: 2001-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi