Impact of injury location and severity on posttraumatic epilepsy in the rat: role of frontal neocortex

Author: Curia, G.; Levitt, M.; Fender, J. S.; Miller, J. W.; Ojemann, J. & D’Ambrosio, R.

Description: Human posttraumatic epilepsy (PTE) is highly heterogeneous, ranging from mild remitting to progressive disabling forms. PTE results in simple partial, complex partial, and secondarily generalized seizures with a wide spectrum of durations and semiologies. PTE variability is thought to depend on the heterogeneity of head injury and patient’s age, gender, and genetic background. To better understand the role of these factors, we investigated the seizures resulting from calibrated fluid percussion injury (FPI) to adolescent male Sprague-Dawley rats with video electrocorticography. We show that PTE incidence and the frequency and severity of chronic seizures depend on the location and severity of FPI. The frontal neocortex was more prone to epileptogenesis than the parietal and occipital, generating earlier, longer, and more frequent partial seizures. A prominent limbic focus developed in most animals, regardless of parameters of injury. Remarkably, even with carefully controlled injury parameters, including type, severity, and location, the duration of posttraumatic apnea and the age and gender of outbred rats, there was great subject-to-subject variability in frequency, duration, and rate of progression of seizures, indicating that other factors, likely the subjects’ genetic background and physiological states, have critical roles in determining the characteristics of PTE.

Subject headings: Animals; Craniocerebral Trauma, complications, pathology, physiopathology; Electroencephalography, methods; Epilepsy, Post-Traumatic, etiology, pathology, physiopathology; Male; Neocortex, pathology, physiopathology; Rats; Rats, Sprague-Dawley; Severity of Illness Index

Publication year: 2011

Journal or book title: Cerebral cortex

Volume: 21

Issue: 7

Pages: 1574-1592

Find the full text:

Find more like this one (cited by):,16&hl=en

Type: Journal article

Serial number: 3066

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.