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

Central processing from speech recognition to vocalization

Research Project

Project/Area Number 09671742
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Otorhinolaryngology
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

FUJIKI Nobuya  Kyoto University Graduate School of Medicine, Department of Hearing and Speech Science, Instructor, 医学研究科, 助手 (20271009)

Co-Investigator(Kenkyū-buntansha) NAGAMINE Takashi  Kyoto University Graduate School of Medicine, Department of Brain Pathophysiolog, 医学研究科, 助手 (10231490)
NAITO Yasushi  Kyoto University Graduate School of Medicine, Department of Hearing and Speech S, 医学研究科, 講師 (70217628)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1998: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1997: ¥2,000,000 (Direct Cost: ¥2,000,000)
Keywordsauditory language / Magnetoencephalography / superior temporal gyrus / visual language / visual cortex / temporo-parieto-occipital region / Broca's area / supplementary motor area / 発語 / 事象関連脳磁界反応 / 側頭葉-頭頂葉-後頭葉境界部 / 運動野 / 並列処理 / 語音 / 優位半球 / 漢字
Research Abstract

To evaluate, an auditory language processing, we measured auditory evoked magnetic fields elicited by a speech sound and non speech sounds using magnetoencephalography. N100m latency of a pure tone, the fundamental frequency of which was 170 Hz, was longer than that of a white noise, a Japanese vowel sound and a produced complex sound which included power of F0, F1, F2 and F3 peak of the vowel sound. Equivalent current dipole (ECD) elicited by each stimulus was estimated in the superior temporal gyrus and there was no significant difference of the location between each other. Although the ECD moment was larger over the right hemisphere than the left hemisphere, the difference of the ECD moments between these stimuli was significant over the left hemisphere. This finding imply that phonological processing is performed mainly in the left auditory cortex, which seems to be dominant in language processing.
Regarding a visual language processing, event-related magnetic fields (ERFs) were rec … More orded when normal subjects were presented with a rectangle, a Japanese Kanji character and an unreadable character followed by silent reading only if Kanji character was presented. The ERF averages for the Kanji and unreadable characters were larger than that for the rectangle at latencies of about 100 ms in the visual cortex and 200 ms in the temporo-parieto-occipital region. This observation suggests that the first stage of visual word processing might arise in the occipital lobe. This observation suggests that the first stage of visual language processing might arise in the visual, cortex.
Event-related magnetic fields (ERFs) were also recorded when the subjects were presented with Japanese Kanji characters followed by vocalizations. The ERF were observed at latencies of about 100 ms in the visual cortex and 200 ms in the temporo-parieto-occipital region which is so-called Wernicke's area. In some cases, the ERFs were also seen on the frontal lobe at the latencies from 200 ms to 400 ms and the ECDs were estimated in Broca's area, its right hemisphere homologue and the supplementary motor area. These findings suggests that parallel processing might occur in the frontal cortex during vocalizations. Less

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] Naito, Y., et al: "Sound-induced Activation of Auditory Cortices in Cochlear Implant Users with Post-and Prelingual Deafness Demonstrated by Positron Emission Tomography." Acta Otolaryngol(Stockh). 117. 490-496 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Fujiki, N., et al: "Influence of unilateral deafness on auditory evoked magnetic field." Neuro Report. 9. 3129-3133 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Fujiki, N., et al: "Influence of speech-coding strategy on cortical activity in cochlear implant users : positron emission tomographic study." Acta Otolaryngol(Stockh). 118. 797-802 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Fujiki, N., et al: "Correlation between rCBF and speech perception in cochlear implant users." Auris Nasus Larynx. in press. (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Fujiki,N., et al: "Brain activities of pre-and postlingually deafened children using cochlear implants." Ann Otol Rhinol Laryngol(Suppl). in press. (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Naito, Y., et al: "Auditory evoked magnetic fields in patients with hearing disorder." Biomag 98. in press. (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Naito., et al: "Sound induced Activation of Auditory Cortices in Cochlear Implant Users with Post-and Preligual Deafness Demonstrated by Positron Emission Tomography." Acta Otolaryngol (Stockh). 117. 490-496 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Fujiki N., et al: "Influence of unilateral deafness on auditory evoked magnetic field." NeuroReport. 9. 3129-3133 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Fujiki N., et al: "Influence of speech-coding strategy on cortical activity in cochlear implant users : a positron emission tomographic study." Acta Otolaryngol (Stockh). 118. 797-802 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Fujiki N., et al: "Correlation between rCBF and speech perception in cochlear implant users." Auris Nasus Larynx. (in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Fujiki N., et al: "Brain activities of pre-and postlingually deafened children using cochlear implants." Ann Otol Rhinol Laryngol (Suppl). (in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Naito Y., et al: "Auditory evoked magnetic fields in patients with hearing disorder" Biomag. 98(in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Fujiki N.,et al: "Influence of unilateral deafness on auditory evoked magnetic field." Neur oReport. 9. 3129-3133 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Fujiki N.,et al: "Influence of speech-coding strategy on cortical activity in cochlear implant users : a positron emission tomographic study." Acta Otolaryngol(Stockh). 118. 797-802 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Naito Y.,et al: "Effect of profound deafness on cortical networks for spoken language processing a PET study." Cochlear implants(Waltzman SB and Cohen NL,eds.).(in press). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Naito Y.,et al: "Auditory evoked magnetic fields in patients with hearing disorder." Biomag 98. (in press). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Fujiki N.,et al: "Correlation between rCBF and speech perception in cochlear implant users." Auris Nasus Larynx. (in press). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Fujiki N.,et al: "Brain activities of pre-and postlingually deafened children using cochlear implants." Ann Otol Rhinol Laryngol(Suppl). (in press). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Shiomi Y., et al: "Efficacy of transmeatal low power laser irradiation on tinnitus:a preliminary report." Auris Nasus Larynx. 24. 39-42 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Shiomi Y., et al: "Characteristics of DPOAE audiogram in tinnitus patients." Hearing Res. 108. 83-88 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Naito Y., et al: "Brain plasticity observed deaf subjects:PET study in cochlear implant users and normal subjects." Proceedings of XVI world congress of otorhinolaryngology head and neck surgery. 937-941 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Naito Y., et al: "Sound-induced Activation of Auditory Cortices Cochlear Implant Users with Post-and Prelingual Deafness Demonstrated by Positron Emission Tomography." Acta Otolaryngol(Stockh). 117. 490-496 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Shiomi Y., et al: "Cortical Activity of a Patient With Usher's Syndrome Using a Cochlear Implant." Am J Otolaryngol. 18. 412-414 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 藤木暢也、他: "突発性難聴陳旧例に対する高圧酸素療法" 耳鼻臨床. 90. 1319-1322 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 本庄 巌、他: "脳からみた言語" 中山書店, 250 (1997)

    • Related Report
      1997 Annual Research Report

URL: 

Published: 1997-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi