Locating vep equivalent dipoles in magnetic resonance images

Towle V. L., ÇAKMUR R., Cao Y., Brigell M., Parmeggiani L.

International Journal of Neuroscience, cilt.80, ss.105-116, 1995 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 80
  • Basım Tarihi: 1995
  • Doi Numarası: 10.3109/00207459508986096
  • Dergi Adı: International Journal of Neuroscience
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.105-116
  • Anahtar Kelimeler: Evoked potential, Image registration, Magnetic resonance imaging, MRI, VEP, Visual evoked potential
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Pattern-reversal and diffuse flash visual evoked potentials (VEPs) were obtained from 4 normal adults. A spatio-temporal dipole model was used to determine the location of the hypothetical equivalent dipoles consistent with the scalp distribution of the VEPs. Equivalent dipoles representing ERG and VEP activity were placed within 3-D magnetic resonance images of the brain. Most of the localization error appeared to be due to inadequate sampling of the potential field in frontal and occipital areas by the 10-20 system of electrode placement. Locating electrophysiologic dipoles within magnetic resonance images of brain structure allows evaluation of dipole localization techniques. © 1995 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.