Functional Brain Imaging of Speech Perception via Electrical Stimulation

E. A. Tobey, M. D. Devous, P. S. Roland

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

In order to examine factors contributing to speech perception performance variations in cochlear implant users, single photon emission computed tomography (SPECT) was used to examine cortical activity (regional cerebral blood 1 flow, rCBF) elicited by the electrical stimulation of multichannel cochlear implants. Normal hearing (N=9) and cochlear implant (N=8) subjects watched a 15 minute videotaped story under two conditions: audio presented monaurally to the left ear (implanted for cochlear implant subjects), and a visual only presentation. Left monaural stimulation in normal hearing subjects produced significant bilateral activation of Brodmann areas 41, 42, 22, 21, and 38. Cochlear implant subjects with relatively high levels of open-set speech perception demonstrated bilateral activation of cortex; however, the extent of activation was significantly less than that observed for normal hearing individuals, particularly in auditory association cortex (Brodmann areas 22, 21, 38). Individuals with minimal open set speech perception scores demonstrated unilateral activation of the cortex on the hemisphere contralateral to the ear of implantation, with minimal auditory association cortex activation. Supported by NIH-NIDCD R01 DC04558.

Original languageEnglish (US)
Title of host publicationAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
EditorsR.S. Leder
Pages1991-1994
Number of pages4
Volume3
StatePublished - 2003
EventA New Beginning for Human Health: Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Cancun, Mexico
Duration: Sep 17 2003Sep 21 2003

Other

OtherA New Beginning for Human Health: Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
CountryMexico
CityCancun
Period9/17/039/21/03

    Fingerprint

Keywords

  • Brain imaging
  • Cochlear Implants
  • Electrical Hearing
  • rCBF
  • SPECT

ASJC Scopus subject areas

  • Bioengineering

Cite this

Tobey, E. A., Devous, M. D., & Roland, P. S. (2003). Functional Brain Imaging of Speech Perception via Electrical Stimulation. In R. S. Leder (Ed.), Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings (Vol. 3, pp. 1991-1994)