Optical recording of retinal and visual cortical responses evoked by electrical stimulation on the retina

Makoto Osanai, Haruko Sakaehara, Hajime Sawai, Wen Jie Song, Tetsuya Yagi

Research output: Contribution to journalArticlepeer-review


To develop a retinal prosthesis for blind patients using an implanted multielectrode array, it is important to study the response properties of retinal ganglion cells and of the visual cortex to localized retinal electrical stimulation. Optical imaging can reveal the spatio-temporal properties of neuronal activity. Therefore, we conducted a calcium imaging study to investigate response properties to local current stimulation in frog retinas, and a membrane potential imaging study to explore the visual cortical responses to retinal stimulation in guinea pigs. In the retina, local current stimuli evoked transient responses in the ganglion cells located near the stimulus electrode. The spatial pattern of the responding area was altered by changing the location of the stimulation. Local electrical stimulation to the retina also caused transient responses in the visual cortex. The responding cortical areas in the primary visual cortex were localized. A spatially different cortical response was observed to stimulation of a different position on the retina. These results suggest that the imaging study has great potential in revealing the spatio-temporal properties of the neuronal response for the retinal prosthesis.

Original languageEnglish
Pages (from-to)1595-1602+16
JournalIEEJ Transactions on Electronics, Information and Systems
Issue number10
Publication statusPublished - 2007


  • Artificial vision
  • Calcium imaging
  • Electrical stimulation
  • Membrane potential imaging
  • Retina
  • Visual cortex

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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