An 8-year experience with depth electrodes in the evaluation of ablative seizure surgery candidates

J. R. Smith, H. F. Flanigin, D. W. King, B. B. Gallagher, Anthony M Murro, G. L. Holmes, L. R. Campbell, Gregory P Lee, J. Wheless

Research output: Contribution to journalArticle

13 Scopus citations


Stereotactically implanted depth electrodes are one means of localization of seizure foci. Unilateral seizure focus localization was obtained in 72.7% mesial temporal (MT) implants and 50% of focus/extramesial temporal (MT-XMT) implants. Recent increase in localization to over 80% in MT implants was possible because a larger percentage of patients had MT-XMT implants. Increased localization to 60% in MT- XMT implants was related to using more XMT electrodes per patient and to orienting electrodes to monitor larger limbic XMT and neocortical areas. Since MT foci were localized in 25% of MT-XMT cases, MT electrodes should be included with all MT-XMT implants. Depth electrography can also be used to rule out certain patients as surgical candidates. Therefore, a surgical decision can be reached in a very high percentage of patients undergoing depth implantation. Surgical results are comparable to those in our overall series.

Original languageEnglish (US)
Pages (from-to)60-66
Number of pages7
JournalStereotactic and Functional Neurosurgery
Issue number1-8
StatePublished - Jan 1 1990



  • Depth electrodes
  • Epilepsy focus
  • Seizure focus localization
  • Stereotactic surgery
  • Temporal lobe

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology

Cite this

Smith, J. R., Flanigin, H. F., King, D. W., Gallagher, B. B., Murro, A. M., Holmes, G. L., Campbell, L. R., Lee, G. P., & Wheless, J. (1990). An 8-year experience with depth electrodes in the evaluation of ablative seizure surgery candidates. Stereotactic and Functional Neurosurgery, 54(1-8), 60-66.