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A NEUROPHYSIOLOGICAL STUDY ON COCHLEAR IMPLANTATION BY OPTICAL IMAGING

Research Project

Project/Area Number 06454484
Research Category

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

Allocation TypeSingle-year Grants
Research Field Otorhinolaryngology
Research InstitutionTOKYO MEDICAL AND DENTAL UNIBERSITY

Principal Investigator

TANIGUCHI Ikuo  TOKYO MEDICAL AND DENTAL UNIVERSITY PROFESSOR, 難治疾患研究所, 教授 (60014255)

Co-Investigator(Kenkyū-buntansha) HOSOKAWA Yutaka  TOKYO MEDICAL AND DENTAL UNIVERSITY RESEARCH ASSOCIATE, 難治疾患研究所, 助手 (80181501)
HORIKAWA Junsei  TOKYO MEDICAL AND DENTAL UNIVERSITY ASSOCIATE PROFESSOR, 難治疾患研究所, 助教授 (50114781)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥7,200,000 (Direct Cost: ¥7,200,000)
Fiscal Year 1995: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1994: ¥4,900,000 (Direct Cost: ¥4,900,000)
KeywordsCOCHLEAR IMPLANT / OPTICAL IMAGING / NEUROPHYSIOLOGICAL STUDY / COCHLEAR ELECTRICAL STIMULATION17GA01 : Horikawa, J.and I.Taniguchi
Research Abstract

To observe the spatio-temporal representation of cochlear electrical stimulation in the auditory cortex, we applied the optical imaging technique in the guinea pig. The cortical activity induced by acoustic and cochlear electrical stimulation were recorded with a 12*12 photodiode array and a voltage-sensitive dye. For electrical stimulation wire electrodes were inserted into the scala tympani and the scala vestibuli of the cochlea. Bipolar stimulation with single electrical pulses to the cochlea induced two active spots separated in the auditory cortical fields, anterior and dorsocaudal, which are tonotopically organized. Such active spots were transiently localized in the cortex also in acoustic stimulation. However, the active spots induced by electrical stimulation moved transversally across isofrequency contours in the auditory cortex and spread broadly throughout the cortex with time. The magnitude of responses as a function of electrical intensity showed a very narrow dynamic range. In addition, the response latencies were almost constant for various stimulus intensities. These results were significantly different from those for normal sound stimulation. This suggests that electrical stimulation bypasses the sensory transducer mechanism, and activates directly the nerve terminals in the cochlea.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (32 results)

All Other

All Publications (32 results)

  • [Publications] 谷口郁雄 他: "蝸牛内電気刺激による聴覚皮質神経活動のオプティカル・イメージング" Audiol.Jpn.38. 543-544 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 森山俊男 他: "異なった方向からの音刺激によるモルモット皮質聴覚領の両耳応答の時空間パターン" Audiol.Jpn.38. 735-736 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Taniguchi,I.et al.: "Optical imaging of neural activity in audotiry cortex induced by intracochlear electrical stimulation." Proceedings of IBRO Satellite Symposium "Processing in Auditory and Language Cortex". (in press). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Moriyama,T.et al.: "Optical recording of azimuth representation in guinea pig auditory cortex." Proceedings of IBRO Satellite Symposium "Processing in Auditory and Language Cortex". (in press). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Taniguchi,I.et al.: "Optical imaging of cortical activity induced by intracochlear electrical stimulation" Biomedical Res.(in press). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Horikawa,J.et al.: "Optical imaging of spatiotemporal patterns of glutamatergic excitation and GAB Aergic inhibition in the guinea pig auditory cortex in vivo." J.Physiol.(in press). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] "Two-dimensional optical recording of neural activities of guinea pig auditory cortex in response to acoustic stimuli." International symposium of "Dynamics of Neural Processing". Extended abstracts book. 44-48 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Hosokawa, Y., Horikawa, M.Nasu and I.Taniguchi: "Binaural interaction in the guinea pig auditory cortex observed by optical recording." Assoc.Res.Otolaryngol Abstr. 23-93 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Horikawa, J., I.Taniguchi, Y.Hosokawa, M.Kubota and M.Nasu: "Glutamatergic excitation and GABA ergic inhibition in guinea pig auditory cortex observed by in-vivo optical recording" Neurosci.Res.Suppl. 19. S213 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Hosokawa, Y., J.Horikawa, M.Nasu and I.Taniguchi: "Binaural responses of guinea pig auditory cortex observed by optical imaging method" Jpn.J.Physiol. 44, Suppl.1. S195 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Moriyama, T., Y.Hosokawa, J.Horikawa and I.Taniguchi: "Spatio-temporal representation of sound localization in the guinea pig auditory cortex measured by optical recording" Neurosci.Res.Suppi. 19. S213 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Horikawa, J., Y.Hosokawa, M.Kubota, M.Nasu and Taniguchi I: "Excitatory and inhibitory mechanism in the auditory cortex of guinea pigs observed by in-vivo optical recording" 4th IBRO World Congress of Neuroscience, Abstr. 288 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Taniguchi, I., J.Horikawa, Y.Hosokawa and M.Nasu: "Optical imaging of neural activity in audotiry cortex induced by intracochlear electrical stimulation." IBRO Satellite Symposium "Processing in Auditory and Language Cortex". 20-50 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Taniguchi, I., J.Horikawa and Y.Hosokawa: "Optical imaging of cortical activity induced by intracochlear electrical stimulation" International Symposium "Plastic Change in the Vecoauditory System of the Brain", Abstr. 18 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Moriyama, T., J.Horikawa, Y.Hosokawa and I.Taniguchi: "Optical recording of azimuth representation in guinea pig auditory cortex" IBRO Satellite Symposium "Processing in Auditory and Language Cortex".

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Hosokawa, Y., J.Horikawa, M.Nasu and I.Taniguchi: "Optical recording of guinea pig auditory cortex induced by intracochlear electrical stimulation" Jpn.J.Physiol. 45 : Suppl.1. S169 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Horikawa, J., Y.Hosokawa, M.Nasu and I.Taniguchi: "Spatial and temporal characteristics of inhibition in the guinea pig auditory cortex studied by optical recording" Jpn.J.Physiol. 45 : Suppl.1. S161 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Moriyama, T., Y.Hosokawa, J.Horikawa and I.Taniguchi: "Frequency dependency of directional sensitivity in guinea pig auditory cortex observed by optical imaging" Jpn.J.Physiol. 45 : Suppl.1. S160 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Taniguchi, I., J.Horikawa, Y.Hosokawa and M.Nasu: "Optical imaging of cortical activity indeced by intracochlear electrical stimulation" Biomedical Res. (in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Horikawa, J., Y.Hosokawa, M.Kubota, M.Nasu and I.Taniguchi: "Optical imaging of spatiotemporal patterns of glutamatergic excitation and GABAergic inhibition in the guinea pig auditory cortex in vivo" J.Physiol. (in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 谷口郁雄 他: "蝸牛内電気刺激による聴覚皮質神経活動のオプティカル・イメージング" Audiol.Jpn.38. 543-544 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 森山俊男 他: "異なった方向からの音刺激によるモルモット皮質聴覚領の両耳応答の時空間パターン" Audiol.Jpn.38. 735-736 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Taniguchi,I.et al.: "Optical imaging of neural activity in audotiry cortex induced by intracochlear electrical stimulation." Proceedings of IBRO Satellite Symposium "Processing in Auditory and Language Cortex". (in press). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Moriyama,T.et al.: "Optical recording of azimuth representation in guinea pig auditory cortex." Proceedings of IBRO Statellite Symposium "Processing in Auditory and Language Cortex". (in press). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Taniguchi,I.et al.: "Optical imaging of cortical activity induced by intracochlear electrical stimulation" Biomedical Res.(in press). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Horikawa,J.et al.: "Optical imaging of spatiotemporal patterns of glutamatergic excitation and GABAergic inhibition in the guinea pig auditory cortex in vivo." J.Physiol.(in press). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Horikawa,J.et al.: "Two-dimensional optical recording of neural activities of guinea pig auditory cortex in response to acoustic stimuli." Extended Abstracts Book of International Symposium of "Dyanamics of Neural Processing". 44-48 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Horikawa,J.et al.: "Spatiotemporal responese change in rat auditory cortex during cerebral ischemia monitored by optical recording." Assoc.Res.Otolaryngol.Abstr.23 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Hosokawa,Y.et al.: "GABA responses in guinea pig auditory cortex observed by optical recording." Neurosci.Res.Suppl.19. S212 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Horikawa,J.et al.: "After-discharges in the auditory cortex of the mustached bat : No oscillatory discharges for binding auditory information." Hearing Res.76. 45-52 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Moriyama,T.et al.: "Responses of inferior collicular neurons of the FM bat,Eptesicus fuscus,to pulse trains with varied pulse amplitudes." Hearing Res.79. 105-114 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Horikawa,J.et al.: "Effects of inhibitory and excitatory channel blockers on neural responses of guinea pig auditory cortex studied by in-vivo optical recording." Jpn.J.Physiol.44 Suppl.1. S195 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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