Related Experiment Video
Updated: Jan 13, 2026
Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale
Published on: July 8, 2025
Feature library for behavioural characterization of early and late seizures in an experimental model of
Pedro Andrade1, Asla Pitkänen1
1A. I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, PO Box 1627, Kuopio FI-70211, Finland.
Background:
To generate a behavioral feature library for a more granular description of seizure semiology in rats with traumatic brain injury (TBI). To compare the new approach to the Racine score.
New Method:
A library of 59 seizure-related behavioral features was generated by annotating 329 seizures in 31 rats with TBI, which were monitored using high-resolution video-electroencephalogram. Of the 329 seizures, 149 were early, 85 post-electrode implantation (6th post-injury month), and 95 late seizures (7th post-injury month). Of the 59 behavioral features, 3 were pre-ictal, 43 ictal, and 13 post-ictal. Of the 43 ictal features, 7 related to consciousness, 5 to mouth and whiskers, 2 to eyes, 7 to head, 2 to ears, 6 to paws, 12 to body and tail, 2 to autonomic function, and 1 to wet-dog shakes.
Results:
Early, post-implantation, and late seizures showed different behavioral phenotypes (p < 0.001). The number of behavioral features in post-electrode implantation and late seizures was greater than that in early seizures (p < 0.05). Behavioral features did not reliably differentiate transitions from pre-ictal to ictal or from ictal to post-ictal phases.
Comparison With Existing Methods:
Ninety-one percent of early, 45 % of post-electrode implantation, and 18 % of late seizures with a Racine score of 0 showed up to 6-7 ictal-related behaviors.
Conclusions:
The Proposed feature list can be applied for the harmonization of data analysis and reporting, and training of video-based seizure detection algorithms to speed up non-invasive, affordable epilepsy diagnosis and assessment of treatment effects in TBI models.
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