Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

  • Listen to MedLink on the go with Audio versions of each article.

Hippocampal seizure with progressive involvement of neocortical temporal areas (spectral analysis)

32-channel stereoelectroencephalographic referential recording of a spontaneous hippocampal onset seizure. The recording from the left hippocampus (inner contacts of depth electrode 2 = channel 5) is enlarged at the top of the figure. Spectral analysis of the 32 channels is shown at right for four time windows (1, 5, 7, and 9). Note the anatomical position of the eight depth electrodes. The contacts recorded are numbered in the Talairach schema and are arranged from top-left to right-bottom in the power spectra maps (frequency 0 to 30 Hz). Note the clear-cut power maximum in the channel 5 recording from the left hippocampus with progressive involvement of the outer contacts of depth electrodes 3 and 4 in window 9. (Contributed by Dr. Heinz Gregor Wieser.)

Associated Disorders

  • mesial temporal lobe epilepsy
  • mesial temporal lobe epilepsy with hippocampal sclerosis